JP2003018480A - Video wireless transmitter, video wireless receiver and video wireless transmission reception system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video wireless transmission reception system that can excellently transmit and receive video and audio by preventing missing of a communication signal and deterioration in an error rate. SOLUTION: A high frequency transmission circuit section 14 is placed closely to a 1st side 30a, a transmitter side control circuit section 15 is placed closely to both of a 2nd side 30b and a 4th side 30d, and a video signal analog/digital conversion circuit section 11 is placed closely to both of a 3rd side 30c and a 4th side 30d on one side of a printed circuit board 30. Further, a transmission signal processing circuit section 13 is placed closely to the 1st side 30a, a transmitter side reference signal generating circuit section 16 is placed to one corner clamped by the 2nd side 30b and the 4th side 30d, and a transmitter side power supply circuit section 17 is placed to a corner clamped by the 3rd side 30c and the 4th side 30d on the other side of the printed circuit board 30, and an audio signal analog/digital conversion circuit section 12 is placed closely to the 4th side 30d clamped between the transmitter side reference signal generating circuit section 16 and the transmitter side power supply circuit section 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video wireless transmission / reception system including a video transmitter for wirelessly transmitting a video signal and a video receiver for receiving the video signal wirelessly transmitted. .

[0002]

2. Description of the Related Art FIG. 6 is a block circuit diagram showing a schematic configuration of a conventional video wireless transmission / reception system. The conventional video wireless communication system 50 of FIG. 6 has the following circuit configuration. The video wireless transmission / reception system 50 includes a video wireless transmitter 53 and a video wireless receiver 56.

A video tape recorder (VTR) 52, for example, is connected to the input side of the video wireless transmitter 53, and an antenna 54 is connected to the output side of the video wireless transmitter 53. Also, the video wireless receiver 56
An antenna 55 is connected to the input side of, and the output side of the video wireless receiver 56 is, for example, a television (TV) 5
7 is connected.

Next, the operation of the conventional video wireless transmission / reception system 50 of FIG. 6 will be described. Video wireless transmitter 5
3, the video signal P and the audio signal S output from the video tape recorder (VTR) 52 are converted into a high frequency signal RF by the video wireless transmitter 53 and transmitted from the antenna 54 to the video wireless receiver 56.

In the video wireless receiver 56, the high frequency signal RF transmitted from the video wireless transmitter 53 is received by the antenna 55. The received radio frequency signal RF is converted into the original video signal P and audio signal S by the video wireless receiver 56. The video signal P and the audio signal S are input to the television (TV) 57 and converted into video and audio.

As described above, by using the video wireless transmission / reception system 50, for example, a video tape recorder (VTR) 52 or the like can be viewed on a television (TV) 57 or the like installed at a remote place. be able to. Also, a video tape recorder (VTR) 5
2, an outdoor antenna is connected, and a television broadcast is tuned in by a video tape recorder (VTR) 52.
Video signal P and audio signal S of the selected television broadcast
By outputting the above, the television broadcast can be viewed on the television (TV) 57 even in a place where the television signal cannot be properly received indoors.

In order to transmit the video signal P and the audio signal S from the video wireless transmitter 53 to the video wireless receiver 56 by the high frequency signal RF, for example, the frequency band of the high frequency signal RF is 2.4 GHz band, Spread spectrum (S
The pread spectrum technology is used. Generally, in a communication method using a spread spectrum technique, an input baseband signal such as a video signal P and an audio signal S is modulated on the transmitting side, and further spread spectrum is performed using a spread code, and then transmitted as a high frequency signal RF. To be done. The spread spectrum signal received at the receiving side is demodulated (despread) using the same spreading code as at the transmitting side.
Then, the original video signal P and audio signal S are obtained.

[0008]

However, the above-mentioned prior art has the following problems. That is, in the case where the respective circuits constituting each of the video wireless transmitter 53 and the video wireless receiver 56 are arranged on one printed circuit board having a small area in order to miniaturize the video wireless transmitter 53, mutual interference of signals between the circuits is caused. However, there has been a problem in that a communication signal is lost or an error rate is deteriorated due to mixing of different signals from other circuits, so that video and audio cannot be transmitted and received well.

In order to solve the above-mentioned problems, how to arrange each circuit to be formed on one printed circuit board having a small area is examined in each of the video wireless transmitter 53 and the video wireless receiver 56. Had to do.

The present invention has been made in order to solve the above problems, and separates each circuit into circuit blocks, and devises a method of arranging each circuit block on a printed circuit board. As a result, by reducing mutual interference of signals between circuits and mixing of different signals from other circuits, loss of communication signals and deterioration of error rate can be prevented, and video and audio can be transmitted and received satisfactorily. The purpose is to provide a system.

[0011]

In order to solve the above problems, the present invention provides a video signal analog / digital conversion circuit section for converting an input analog video signal into a digital video signal, and an input analog audio signal. An audio signal analog / digital conversion circuit unit for converting into a digital audio signal, a transmission signal processing circuit unit for converting the digital video signal and the digital audio signal into a packetized transmission baseband signal, and a high frequency of the transmission baseband signal. A high frequency transmission circuit unit for converting into a signal, a transmission side control circuit unit for controlling the operation of the transmission signal processing circuit unit, and a transmission side reference signal for generating a reference signal relating to the transmission signal processing circuit unit and the high frequency transmission circuit unit. The generation circuit section and the transmission side power supply circuit section for supplying power to each circuit section are provided on both front and back surfaces of a substantially rectangular printed board. A video wireless transmitter provided, wherein the video signal analog / digital conversion circuit unit, the high frequency transmission circuit unit, and the transmission side control circuit unit are provided on one surface of the printed circuit board, On the other side, the audio signal analog-digital conversion circuit unit,
The transmission signal processing circuit unit, the transmission side reference signal generation circuit unit, and the transmission side power supply circuit unit are arranged.

Further, according to the present invention, on one surface of the printed circuit board, the high-frequency transmission circuit section is arranged close to the first side of the printed circuit board, and the second side adjacent to the first side. Of the third side adjacent to the first side and the first side of the third side adjacent to the first side. It is characterized in that the video signal analog-digital conversion circuit section is disposed in proximity to both sides of a fourth side facing the side.

According to the present invention, on the other surface of the printed circuit board, the transmission signal processing circuit section is disposed close to the first side of the printed circuit board and is adjacent to the first side. The transmission-side reference signal generating circuit section is disposed at one corner sandwiched between the second side and the fourth side facing the first side, and the third side adjacent to the first side and the third side. The transmission side power supply circuit section is disposed at one corner sandwiched between a fourth side facing the first side and the fourth side sandwiched by the transmission side reference signal generating circuit section and the transmission side power supply circuit section. The audio signal analog / digital conversion circuit section is disposed in the vicinity of the side.

Further, according to the present invention, the printed circuit board is a laminated board including a surface layer, a plurality of intermediate layers, and a back surface layer, and the video signal analog-digital conversion circuit section and a high frequency wave are formed on the surface layer. A transmission circuit section and a transmission side control circuit section are provided, and the voice signal analog / digital conversion circuit section, a transmission signal processing circuit section, a transmission side reference signal generation circuit section, and a transmission side power supply circuit section are provided on the back surface layer. The ground pattern relating to each of the circuit portions is disposed on at least one of the plurality of intermediate layers.

Further, according to the present invention, the power supply circuit section on the transmitting side supplies power to at least one of the other intermediate layers sandwiched between the surface layer and the intermediate layer on which the ground pattern is provided. It is characterized in that a power supply pattern relating to the connection with the circuit portion is provided.

Further, according to the present invention, the signal pattern relating to the transmission signal processing circuit section is arranged on at least one of the other intermediate layers sandwiched between the back surface layer and the intermediate layer on which the earth pattern is provided. It is characterized by being installed.

The present invention also provides a high-frequency receiving circuit section for converting an input high-frequency signal into a packetized reception baseband signal, and a digital video signal and a digital signal based on the packetized reception baseband signal. Received signal processing circuit unit for converting to an audio signal, video signal digital / analog conversion circuit unit for converting the digital video signal to an analog video signal, and audio signal digital / analog conversion for converting the digital audio signal to an analog audio signal A circuit section, a reception side control circuit section that controls the operation of the reception signal processing circuit section, a reception side reference signal generation circuit section that generates a reference signal related to the reception signal processing circuit section and the high-frequency receiving path section, and A video circuit that has a receiving side power supply circuit section that supplies power to each circuit section on both front and back sides of a substantially rectangular printed circuit board. In the receiver, the high frequency receiving circuit unit, the video signal digital-analog conversion circuit unit and the receiving side control circuit unit are arranged on one surface of the printed circuit board, and the other surface of the printed circuit board is A reception signal processing circuit unit, a voice signal digital / analog conversion circuit unit, a reception side reference signal generation circuit unit, and a reception side power supply circuit unit are arranged.

Further, according to the present invention, the high-frequency receiving circuit section is disposed on one surface of the printed board in proximity to the first side of the printed board, and the second high-frequency receiving circuit section is adjacent to the first side. And the third side adjacent to the first side and the first side, the receiving-side control circuit unit is disposed close to both sides of the fourth side and the fourth side opposite to the first side. It is characterized in that the video signal digital-analog conversion circuit section is disposed close to both sides of the fourth side facing the side.

According to the present invention, on the other surface of the printed circuit board, the received signal processing circuit section is disposed close to the first side of the printed circuit board and adjacent to the first side. The reception-side reference signal generating circuit section is disposed at one corner sandwiched between the second side and the fourth side opposite to the first side, and the third side adjacent to the first side and the third side. The receiving side power supply circuit section is disposed at one corner sandwiched between a fourth side facing the first side and the fourth side sandwiched by the receiving side reference signal generating circuit section and the receiving side power supply circuit section. The audio signal digital-analog conversion circuit section is disposed in the vicinity of the side.

Further, according to the present invention, the printed board is a laminated board including a front surface layer, a plurality of intermediate layers, and a back surface layer, and the front surface layer includes the high-frequency receiving circuit section and a video signal digital analog. A conversion circuit unit and a reception side control circuit unit are provided, and the reception signal processing circuit unit, a voice signal digital / analog conversion circuit unit, a reception side reference signal generation circuit unit, and a reception side power supply circuit unit are provided on the back surface layer. The ground pattern relating to each of the circuit portions is disposed on at least one of the plurality of intermediate layers.

Further, according to the present invention, the receiving side power supply circuit section supplies power to at least one of the other intermediate layers sandwiched between the surface layer and the intermediate layer on which the ground pattern is provided. It is characterized in that a power supply pattern relating to the connection with the circuit portion is provided.

Further, according to the present invention, the signal pattern relating to the received signal processing circuit section is arranged on at least one of the other intermediate layers sandwiched between the back surface layer and the intermediate layer on which the earth pattern is provided. It is characterized by being installed.

The video wireless transmission / reception system of the present invention is characterized by comprising the video wireless transmitter and the video wireless receiver.

[0024]

1 is a schematic view showing the arrangement of each circuit on a printed circuit board of a video wireless transmitter according to an embodiment of the present invention, and FIG. 2 shows an embodiment of the present invention. It is a block circuit diagram which shows the schematic structure of the video wireless transmitter concerned. Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
Will be described with reference to.

FIG. 2 shows a video wireless transmitter 1 according to this embodiment.
2 is a block circuit diagram showing a schematic configuration of 0. FIG. The video wireless transmitter 10 of this embodiment shown in FIG. 2 has the following circuit configuration. The video wireless transmitter 10 is a video signal analog
Digital conversion circuit unit 11, voice signal analog / digital conversion circuit unit 12, transmission signal processing circuit unit 13, high frequency transmission circuit unit 14, transmission side control circuit unit 15, transmission side reference signal generation circuit unit 16, transmission side power supply circuit unit 17, an antenna 18, and input terminals 19a and 19b.

The input terminal 19a is connected to the input side of the video signal analog / digital conversion circuit section 11, and the output side of the video signal analog / digital conversion circuit section 11 is connected to the input side of the transmission signal processing circuit section 13. It The input terminal 19b is used for the audio signal analog / digital conversion circuit unit 12
, And the output side of the audio signal analog / digital conversion circuit section 12 is connected to the input side of the transmission signal processing circuit section 13.

The output side of the transmission signal processing circuit section 13 is connected to the input side of the high frequency transmission circuit section 14, and the output side of the high frequency transmission circuit section 14 is connected to the antenna 18. Further, the transmission side control circuit unit 15 is connected to the transmission signal processing circuit unit 13, and the transmission side reference signal generation circuit unit 16 is connected.
However, the transmission signal processing circuit unit 13 and the high frequency transmission circuit unit 14
It is connected to the.

Then, the transmission side power supply circuit section 17 includes the video signal analog / digital conversion circuit section 11, the audio signal analog / digital conversion circuit section 12, and the transmission signal processing circuit section 1.
3, the high frequency transmission circuit unit 14, the transmission side control circuit unit 15, and the transmission side reference signal generation circuit unit 16 are respectively connected.

Next, the operation of the video wireless transmitter 10 of this embodiment shown in FIG. 2 will be described. Video wireless transmitter 10
In, the analog video signal input from the input terminal 19a is converted into a digital video signal by the video signal analog / digital conversion circuit unit 11. The analog audio signal input from the input terminal 19b is converted into a digital audio signal by the audio signal analog / digital conversion circuit unit 12.

The digital video signal and the digital audio signal are converted by the transmission signal processing circuit section 13 into a packetized transmission baseband signal. Then, the transmission baseband signal is converted into a high frequency signal by the high frequency transmission circuit unit 14 and transmitted from the antenna 18 to the video wireless receiver 20 described later.

The transmitting side control circuit section 15 controls the operation of the transmitting signal processing circuit section 13, and the transmitting side reference signal generating circuit section 16 controls the operation of the transmitting signal processing circuit section 13 and the high frequency transmitting circuit section 14. A signal (for example, 44 MHz) is generated. The transmission side power supply circuit unit 17 includes a video signal analog / digital conversion circuit unit 11, a sound signal analog / digital conversion circuit unit 12, a transmission signal processing circuit unit 13, a high frequency transmission circuit unit 14, a transmission side control circuit unit 15, and Power is supplied to each of the transmission side reference signal generation circuit units 16.

As described above, in the video wireless transmitter 10, for example, by connecting a video tape recorder or the like (not shown) to the input terminals 19a and 19b, the video and audio of the video tape recorder or the like (not shown) can be obtained. Can be transmitted to a video wireless receiver 20, which will be described later, installed at a remote place.

In order to transmit the analog video signal and the analog audio signal from the video wireless transmitter 10 as a high frequency signal to the video wireless receiver 20, which will be described later, for example, the frequency band of the high frequency signal is 2.4 GHz band. , Spread spectrum technology is used. Generally, in a communication method using spread spectrum technology, an input baseband signal such as an analog video signal and an analog audio signal is modulated on the transmitting side, spread spectrum is spread using a spread code, and then transmitted as a high frequency signal. It Then, the spread spectrum signal received at the receiving side is demodulated (despread) using the same spreading code as that at the transmitting side, and becomes the original analog video signal and analog audio signal.

FIG. 1 is a schematic view showing the arrangement of each circuit on the printed circuit board of the video wireless transmitter of this embodiment.
(A) is a plan view seen from one side of the printed circuit board, (b) is an enlarged sectional view of a part of the printed circuit board, and (c) is seen from the other side of the printed circuit board. It is a top view. Next, the arrangement of each circuit on the printed circuit board 30 of the video wireless transmitter 10 of this embodiment will be described with reference to FIG.

FIGS. 1 (a) and 1 (c) show a state in which the same circuit configuration as that of the video wireless transmitter 10 described in FIG. 2 is arranged on both front and back surfaces of a substantially rectangular printed circuit board 30. It is a thing. On one surface of the printed circuit board 30 shown in FIG. 1A, the video signal analog / digital conversion circuit unit 1 is provided.
1, the high-frequency transmission circuit unit 14 and the transmission-side control circuit unit 15 are provided, and the audio signal analog / digital conversion circuit unit 12 and the transmission signal processing circuit unit are provided on the other surface of the printed circuit board 30 shown in FIG. 1C. 13, transmission side reference signal generation circuit section 16
Also, a transmission side power supply circuit section 17 is provided.

That is, by disposing the high frequency transmission circuit section 14 and the transmission signal processing circuit section 13 that handles digital signals separately on the front and back sides of the printed circuit board 30, digital signal noise generated from the transmission signal processing circuit section 13 has a high frequency. Mixing in the transmission circuit unit 14 can be reduced.

Further, by separately disposing the high frequency transmitting circuit section 14 and the transmitting side reference signal generating circuit section 16 for generating the reference signal (for example, 44 MHz) on the front and back sides of the printed circuit board 30, the transmitting side reference signal generating circuit is provided. Mixing of the reference signal (for example, 44 MHz) generated by the unit 16 and its harmonic component noise into the high frequency transmission circuit unit 14 can be reduced.

By disposing the high frequency transmitting circuit section 14 and the transmitting side power source circuit section 17 separately on the front and back of the printed circuit board 30, the power source noise generated from the transmitting side power source circuit section 17 is transmitted to the high frequency transmitting circuit section 14. Mixing can be reduced. Further, it is possible to reduce the mixing of external power supply noise from the external power supply (not shown) to which the transmission side power supply circuit unit 17 is connected to the high frequency transmission circuit unit 14.

Further, the video signal analog-digital conversion circuit section 11 and the audio signal analog-digital conversion circuit section 12
By disposing and on the front and back of the printed circuit board 30, mutual interference between the video signal and the audio signal can be reduced.

On one surface of the printed circuit board 30 shown in FIG. 1A, the high frequency transmission circuit section 14 is disposed in the vicinity of the first side 30a of the printed circuit board 30, and the first side 30 is provided.
The transmission side control circuit unit 15 is disposed close to both sides of the second side 30b adjacent to a and the fourth side 30d facing the first side 30a, and the transmission side control circuit unit 15 is adjacent to the first side 30a. Side 3 of 3
0c and the fourth side 30d opposite to the first side 30a and both sides of the video signal analog-digital conversion circuit unit 1
1 is provided.

That is, the high-frequency transmission circuit section 14 is on the first side 30a side, and the transmission-side control circuit section 15 and the video signal analog-digital conversion circuit section 11 are on the fourth side 30d side opposite to the first side 30a. By separately arranging them, it is possible to reduce mixing of digital signal noise generated from the transmission side control circuit unit 15 and the video signal analog / digital conversion circuit unit 11 into the high frequency transmission circuit unit 14.

On the other surface of the printed circuit board 30 shown in FIG. 1C, the transmission signal processing circuit section 13 is arranged close to the first side 30a of the printed circuit board 30, and the first side 3 is provided.
0a is adjacent to the second side 30b and the first side 30a is opposed to the fourth side 30d, and the transmission side reference signal generating circuit section 16 is disposed at one corner and is adjacent to the first side 30a. The matching third side 30c and the fourth side 3 facing the first side 30a.
The transmission side power supply circuit section 17 is disposed in one corner sandwiched between 0d and 0d, and is sandwiched between the transmission side reference signal generation circuit section 16 and the transmission side power supply circuit section 17 and close to the fourth side 30d. A digital conversion circuit unit 12 is provided.

That is, the transmission signal processing circuit unit 13 is set to the first
The digital signal generated from the transmission signal processing circuit unit 13 by separately disposing the audio signal analog-digital conversion circuit unit 12 on the side 30a side of the fourth side 30d facing the first side 30a. It is possible to reduce signal noise from being mixed into the audio signal analog / digital conversion circuit unit 12.

By separately disposing the transmission signal processing circuit section 13 on the first side 30a side and the transmission side power supply circuit section 17 on the fourth side 30d side opposite to the first side 30a, respectively. The digital signal noise generated from the transmission signal processing circuit unit 13 can be reduced from leaking to an external power supply (not shown) connected to the transmission power supply circuit unit 17 via the transmission power supply circuit unit 17, and the external power supply ( External power source noise (not shown) can be reduced from being mixed into the transmission signal processing circuit unit 13.

Further, the transmitting side reference signal generating circuit section 16 is disposed at one corner sandwiched between the second side 30b and the fourth side 30d, and the transmitting side power supply circuit section 17 is arranged at the third side 30c and the third side 30c. It is arranged at one corner sandwiched by four sides 30d, and the transmission side reference signal generation circuit section 16 and the transmission side power supply circuit section 17 are separated by the maximum distance on the fourth side 30d side. Reference signal generated from the signal generation circuit unit 16 (for example, 44 MHz)
And its harmonic component noise can reduce leakage to an external power source (not shown) connected to the transmission side power supply circuit unit 17 via the transmission side power supply circuit unit 17, and at the same time, can reduce the external power supply from the external power supply (not shown). It is possible to reduce mixing of noise into the transmission side reference signal generation circuit section 16.

FIG. 1B is an enlarged cross-sectional view of a part of the printed circuit board 30, showing a state of the pattern arranged between the layers when the printed circuit board 30 is a laminated board. The printed circuit board 30 has a surface layer 31.
And a plurality of intermediate layers 32, 33, 34, 35 and the back surface layer 3
And a video signal analog / digital conversion circuit unit 11, a high frequency transmission circuit unit 14, and a transmission side control circuit unit 15 are disposed on a front surface layer 31, and a back surface layer 36.
1, an audio signal analog / digital conversion circuit unit 12, a transmission signal processing circuit unit 13, a transmission side reference signal generation circuit unit 16 and a transmission side power supply circuit unit 17 are provided, and at least one of the plurality of intermediate layers, FIG. In (b), for example, the intermediate layer 33 is provided with the ground pattern associated with each of the circuit portions. And, each of the circuit parts and the ground pattern,
They are connected by through holes (not shown).

That is, the video signal analog / digital conversion circuit section 11, the high frequency transmission circuit section 14 and the transmission side control circuit section 15 arranged on the front surface layer 31, and the audio signal analog / digital arranged on the back surface layer 36. Conversion circuit unit 12, transmission signal processing circuit unit 13, transmission side reference signal generation circuit unit 16
By electromagnetically shielding the transmission side power supply circuit unit 17 and the ground pattern provided in the intermediate layer 33,
This further enhances the effect of separating the circuits arranged on both the front and back sides of the printed circuit board 30.

Therefore, the high frequency transmission circuit section 14 and the transmission signal processing circuit section 13 for handling digital signals are separately arranged on the front and back of the printed circuit board 30 and are electromagnetically shielded by the earth pattern, whereby the transmission signal processing circuit section is formed. 1
It is possible to more effectively reduce the mixing of the digital signal noise generated from No. 3 into the high frequency transmission circuit unit 14.

The high frequency transmission circuit section 14 and the transmission side reference signal generation circuit section 16 for generating the reference signal (for example, 44 MHz) are separately arranged on the front and back of the printed circuit board 30.
Further, by electromagnetically shielding by the earth pattern, it is possible to more effectively reduce the mixing of the reference signal (for example, 44 MHz) generated by the transmission side reference signal generation circuit section 16 and its harmonic component noise into the high frequency transmission circuit section 14. it can.

Further, the high frequency transmission circuit section 14 and the transmission side power supply circuit section 17 are separately arranged on the front and back of the printed circuit board 30,
Further, by electromagnetically shielding with the earth pattern, it is possible to more effectively reduce the power supply noise generated from the transmission side power supply circuit unit 17 from being mixed into the high frequency transmission circuit unit 14. Furthermore, it is possible to more effectively reduce the mixing of external power source noise from the external power source (not shown) to which the transmitting side power source circuit unit 17 is connected to the high frequency transmitting circuit unit 14.

Further, the video signal analog / digital conversion circuit section 11 and the audio signal analog / digital conversion circuit section 12
By separately disposing and on the front and back of the printed circuit board 30 and electromagnetically shielding them by the earth pattern, mutual interference between the video signal and the audio signal can be more effectively reduced.

At least one of the other intermediate layers sandwiched between the surface layer 31 and the intermediate layer 33 on which the earth pattern is provided in FIG. 1 (b), for example, the intermediate layer 32 in FIG. 1 (b). In addition, a power supply pattern relating to the connection of the transmission side power supply circuit unit 17 with each circuit unit that supplies power is provided. The transmission side power supply circuit section 17 and the power supply pattern are connected by through holes (not shown).

That is, the video signal analog / digital conversion circuit section 11, the high frequency transmission circuit section 14 and the transmission side control circuit section 15 arranged on the front surface layer 31, and the audio signal analog / digital arranged on the back surface layer 36. Conversion circuit unit 12, transmission signal processing circuit unit 13, transmission side reference signal generation circuit unit 16
And the transmission-side power supply circuit section 17 are electromagnetically doubly shielded by both the ground pattern provided on the intermediate layer 33 and the power supply pattern provided on the intermediate layer 32. This further enhances the separation effect between the circuits arranged on both the front and back sides.

Therefore, the high-frequency transmission circuit section 14 and the transmission signal processing circuit section 13 for handling digital signals are separately arranged on the front and back of the printed circuit board 30, and further, the two patterns of the earth pattern and the power supply pattern are used to electromagnetically doubly electromagnetically. By shielding, the digital signal noise generated from the transmission signal processing circuit unit 13 can be more effectively reduced from being mixed into the high frequency transmission circuit unit 14.

Further, the high frequency transmission circuit section 14 and the transmission side reference signal generation circuit section 16 for generating the reference signal (for example, 44 MHz) are separately arranged on the front and back of the printed circuit board 30,
Further, by double electromagnetic shielding by both the ground pattern and the power source pattern, a reference signal (for example, 4
(4 MHz) and its harmonic component noise can be more effectively reduced from being mixed into the high-frequency transmission circuit unit 14.

Further, the high frequency transmission circuit section 14 and the transmission side power supply circuit section 17 are separately disposed on the front and back of the printed circuit board 30,
Further, by double electromagnetic shielding by both the ground pattern and the power source pattern, it is possible to more effectively reduce the power source noise generated from the transmission side power source circuit unit 17 from being mixed in the high frequency transmission circuit unit 14. Further, external power source noise from an external power source (not shown) to which the transmitting side power source circuit section 17 is connected causes high frequency transmitting circuit section 14
It can be more effectively reduced to be mixed in the.

Further, the video signal analog / digital conversion circuit section 11 and the audio signal analog / digital conversion circuit section 12
And 2 are separately disposed on the front and back of the printed circuit board 30 and further double electromagnetically shielded by both the ground pattern and the power source pattern, so that mutual interference between the video signal and the audio signal can be more effectively performed. It can be reduced.

In FIG. 1B, at least one of the other intermediate layers sandwiched between the back surface layer 36 and the intermediate layer 33 on which the ground pattern is arranged, in FIG. 1B, for example, the intermediate layer 35. A signal pattern relating to the transmission signal processing circuit section 13 is provided in the. The transmission signal processing circuit unit 13 and the signal pattern are connected by a through hole (not shown).

That is, by arranging the signal pattern relating to the transmission signal processing circuit section 13 that handles digital signals in the intermediate layer 35, the digital signal noise radiated from the signal pattern can be reduced.

FIG. 3 is a schematic diagram showing the arrangement of each circuit on the printed circuit board of the video wireless receiver according to the embodiment of the present invention, and FIG. 4 is a video wireless receiver according to the embodiment of the present invention. FIG. 3 is a block circuit diagram showing a schematic configuration of the machine. Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 3 and 4.

FIG. 4 shows the video wireless receiver 2 of this embodiment.
2 is a block circuit diagram showing a schematic configuration of 0. FIG. The video wireless receiver 20 of this embodiment shown in FIG. 4 has the following circuit configuration. The video wireless receiver 20 is a digital video signal
Analog conversion circuit unit 21, voice signal digital / analog conversion circuit unit 22, reception signal processing circuit unit 23, high frequency reception circuit unit 24, reception side control circuit unit 25, reception side reference signal generation circuit unit 26, reception side power supply circuit unit 27, an antenna 28, and output terminals 29a and 29b.

The antenna 28 is connected to the input side of the high frequency receiving circuit section 24, and the output side of the high frequency receiving circuit section 24 is
It is connected to the input side of the reception signal processing circuit unit 23. In addition, the output side of the reception signal processing circuit unit 23 has a video signal digital-analog conversion circuit unit 21 and an audio signal digital
It is connected to each input side of the analog conversion circuit section 22. Also, the video signal digital / analog conversion circuit unit 2
The output side of 1 is connected to the output terminal 29a, and the output side of the audio signal digital-analog conversion circuit section 22 is connected to the output terminal 29b.

The receiving side control circuit section 25 is connected to the received signal processing circuit section 23, and the receiving side reference signal generating circuit section 26 is connected to the received signal processing circuit section 23 and the high frequency receiving circuit section 24. .

Then, the receiving side power supply circuit section 27 includes the video signal digital / analog conversion circuit section 21, the audio signal digital / analog conversion circuit section 22, and the reception signal processing circuit section 2.
3, the high frequency receiving circuit section 24, the receiving side control circuit section 25, and the receiving side reference signal generating circuit section 26, respectively.

Next, the operation of the video wireless receiver 20 of this embodiment shown in FIG. 4 will be described. Video wireless receiver 20
In, the high frequency signal from the video wireless transmitter 10 is received from the antenna 28, and the input high frequency signal is converted into a packetized reception baseband signal by the high frequency reception circuit section 24. The packetized reception baseband signal is converted into the original digital video signal and digital audio signal by the reception signal processing circuit unit 23.

The digital video signal is converted into an analog video signal by the video signal digital / analog conversion circuit section 21 and output from the output terminal 29a. The digital audio signal is converted into an analog audio signal by the audio signal digital / analog conversion circuit unit 22 and output from the output terminal 29b.

The reception side control circuit section 25 controls the operation of the reception signal processing circuit section 23, and the reception side reference signal generation circuit section 26 controls the reference of the high frequency reception circuit section 24 and the reception signal processing circuit section 23. A signal (for example, 44 MHz) is generated. The reception side power supply circuit section 27 includes a video signal digital / analog conversion circuit section 21, an audio signal digital / analog conversion circuit section 22, a reception signal processing circuit section 23, a high frequency reception circuit section 24, a reception side control circuit section 25, and Power is supplied to each of the reception side reference signal generation circuit units 26.

As described above, in the video wireless receiver 20, by connecting, for example, a television (not shown) to the output terminals 29a and 29b, the above-mentioned video wireless transmitter 10 installed at a remote place. You can watch the video and audio transmitted from.

As a communication system between the video wireless transmitter 10 and the video wireless receiver 20 described above, for example, the frequency band of the high frequency signal is the 2.4 GHz band, and the spread spectrum (Spread Spectrum) technique is used. There is. Generally, in a communication method using spread spectrum technology, an input baseband signal such as an analog video signal and an analog audio signal is modulated on the transmitting side, spread spectrum is spread using a spread code, and then transmitted as a high frequency signal. It Then, the spread spectrum signal received at the receiving side is demodulated (despread) using the same spreading code as that at the transmitting side, and becomes the original analog video signal and analog audio signal.

FIG. 3 is a schematic view showing the arrangement of each circuit on the printed circuit board of the video wireless receiver of this embodiment.
(A) is a plan view seen from one side of the printed circuit board, (b) is an enlarged sectional view of a part of the printed circuit board, and (c) is seen from the other side of the printed circuit board. It is a top view. Next, the arrangement of each circuit on the printed circuit board 40 of the video wireless receiver 20 of the present embodiment will be described with reference to FIG.

FIGS. 3 (a) and 3 (c) show a state in which the same circuit configuration as that of the video wireless receiver 20 described in FIG. 4 is arranged on both front and back surfaces of a substantially rectangular printed board 40. It is a thing. On one surface of the printed circuit board 40 shown in FIG. 3A, the video signal digital / analog conversion circuit unit 2 is provided.
1. The high frequency receiving circuit section 24 and the receiving side control circuit section 25 are provided, and the audio signal digital / analog converting circuit section 22 and the receiving signal processing circuit section are provided on the other surface of the printed circuit board 40 shown in FIG. 3C. 23, receiving side reference signal generating circuit section 26
Also, a receiving side power supply circuit section 27 is provided.

That is, by disposing the high frequency receiving circuit section 24 and the received signal processing circuit section 23 for handling digital signals separately on the front and back of the printed circuit board 40, the digital signal noise generated from the received signal processing circuit section 23 becomes high frequency. It is possible to reduce mixing into the receiving circuit section 24.

Further, the high-frequency receiving circuit section 24 and the receiving-side reference signal generating circuit section 26 for generating the reference signal (for example, 44 MHz) are separately arranged on the front and back of the printed circuit board 40, so that the receiving-side reference signal generating circuit is provided. It is possible to reduce mixing of the reference signal (for example, 44 MHz) generated by the unit 26 and its harmonic component noise into the high frequency receiving circuit unit 24.

By disposing the high frequency receiving circuit section 24 and the receiving side power source circuit section 27 separately on the front and back sides of the printed circuit board 40, the power source noise generated from the receiving side power source circuit section 27 is transmitted to the high frequency receiving circuit section 24. Mixing can be reduced. Further, it is possible to reduce the mixing of external power supply noise from the external power supply (not shown) to which the receiving side power supply circuit unit 27 is connected to the high frequency receiving circuit unit 24.

Further, the video signal digital / analog conversion circuit section 21 and the audio signal digital / analog conversion circuit section 22.
By disposing and on the front and back of the printed circuit board 40, mutual interference between the video signal and the audio signal can be reduced.

On one surface of the printed circuit board 40 shown in FIG. 3A, the high frequency receiving circuit section 24 is arranged in proximity to the first side 40a of the printed circuit board 40, and the first side 40
The receiving-side control circuit section 25 is disposed in proximity to both sides of the second side 40b adjacent to a and the fourth side 40d facing the first side 40a, and is adjacent to the first side 40a. Side 4 of 3
0c and a fourth side 40d facing the first side 40a, both of which are close to each other, and the video signal digital-analog conversion circuit unit 2
1 is provided.

That is, the high frequency receiving circuit section 24 is on the first side 40a side, and the receiving side control circuit section 25 and the video signal digital / analog conversion circuit section 21 are on the fourth side 40d side opposite to the first side 40a. In addition, by separately arranging them, it is possible to reduce mixing of digital signal noise generated from the reception side control circuit unit 25 and the video signal digital-analog conversion circuit unit 21 into the high frequency reception circuit unit 24.

On the other surface of the printed circuit board 40 shown in FIG. 3C, the reception signal processing circuit section 23 is arranged close to the first side 40a of the printed circuit board 40, and the first side 4
0a is adjacent to the second side 40b and the first side 40a is opposed to the fourth side 40d, and the receiving side reference signal generating circuit section 26 is disposed at one corner and is adjacent to the first side 40a. Third side 40c that matches and fourth side 4 that faces first side 40a
The receiving side power supply circuit section 27 is disposed in one corner sandwiched between 0d and 0d, and is sandwiched between the receiving side reference signal generating circuit section 26 and the receiving side power supply circuit section 27 and is close to the fourth side 40d. An analog conversion circuit section 22 is provided.

That is, the received signal processing circuit section 23 is set to the first
The digital signal generated from the reception signal processing circuit unit 23 by separately arranging the audio signal digital-analog conversion circuit unit 22 on the side 40a side of the fourth side 40d facing the first side 40a. The signal noise can be reduced from being mixed into the audio signal digital-analog conversion circuit section 22.

By disposing the reception signal processing circuit section 23 on the first side 40a side and the reception side power supply circuit section 27 on the fourth side 40d side opposite to the first side 40a, respectively. The digital signal noise generated from the reception signal processing circuit unit 23 can be reduced from leaking to an external power supply (not shown) connected to the reception side power supply circuit unit 27 via the reception side power supply circuit unit 27, and the external power supply ( External power source noise (not shown) can be reduced from being mixed into the received signal processing circuit unit 23.

Further, the receiving side reference signal generating circuit section 26 is disposed at one corner sandwiched between the second side 40b and the fourth side 40d, and the receiving side power supply circuit section 27 is arranged at the third side 40c and the third side 40c. It is arranged at one corner sandwiched by the side 40d of 4 and the distance between the receiving side reference signal generating circuit section 26 and the receiving side power supply circuit section 27 is maximally separated on the side of the fourth side 40d. Reference signal generated from the signal generation circuit unit 26 (for example, 44 MHz)
And its harmonic component noise can reduce leakage to an external power supply (not shown) connected to the reception side power supply circuit section 27 via the reception side power supply circuit section 27, and at the same time, reduce the external power supply from the external power supply (not shown). It is possible to reduce the mixing of noise into the reception side reference signal generation circuit unit 26.

FIG. 3B is an enlarged cross-sectional view of a part of the printed circuit board 40, showing a state of patterns arranged between the respective layers when the printed circuit board 40 is a laminated board. The printed circuit board 40 has a surface layer 41.
And a plurality of intermediate layers 42, 43, 44, 45 and the back surface layer 4
And a video signal digital / analog conversion circuit section 21, a high frequency receiving circuit section 24, and a receiving side control circuit section 25 are disposed on a front surface layer 41, and a back surface layer 46.
An audio signal digital / analog conversion circuit unit 22, a reception signal processing circuit unit 23, a reception side reference signal generation circuit unit 26, and a reception side power supply circuit unit 27 are arranged in at least one of the intermediate layers, as shown in FIG. In (b), for example, the intermediate layer 43 is provided with the ground pattern associated with each of the circuit portions. And, each of the circuit parts and the ground pattern,
They are connected by through holes (not shown).

That is, the video signal digital / analog conversion circuit section 21, the high frequency receiving circuit section 24 and the receiving side control circuit section 25 provided on the front surface layer 41, and the audio signal digital / analog provided on the back surface layer 46. Conversion circuit unit 22, reception signal processing circuit unit 23, reception side reference signal generation circuit unit 26
By electromagnetically shielding the receiving side power supply circuit unit 27 and the ground pattern provided in the intermediate layer 43,
This further enhances the effect of separating the circuits arranged on both the front and back sides of the printed circuit board 40.

Therefore, the high-frequency receiving circuit section 24 and the received signal processing circuit section 23 for handling digital signals are separately arranged on the front and back of the printed circuit board 40, and are further electromagnetically shielded by the earth pattern, so that the received signal processing circuit section is Two
It is possible to more effectively reduce the mixing of the digital signal noise generated from 3 into the high frequency receiving circuit section 24.

The high frequency receiving circuit section 24 and the receiving side reference signal generating circuit section 26 for generating the reference signal (for example, 44 MHz) are separately arranged on the front and back of the printed circuit board 40.
Further, by electromagnetically shielding by the earth pattern, it is possible to more effectively reduce the mixing of the reference signal (for example, 44 MHz) generated by the receiving side reference signal generating circuit section 26 and its harmonic component noise into the high frequency receiving circuit section 24. it can.

Further, the high frequency receiving circuit section 24 and the receiving side power supply circuit section 27 are separately arranged on the front and back of the printed circuit board 40,
Further, by electromagnetically shielding by the earth pattern, it is possible to more effectively reduce the power supply noise generated from the reception side power supply circuit unit 27 from being mixed into the high frequency reception circuit unit 24. Further, it is possible to more effectively reduce the mixing of external power source noise from the external power source (not shown) to which the receiving side power source circuit unit 27 is connected to the high frequency receiving circuit unit 24.

Further, the video signal digital / analog conversion circuit section 21 and the audio signal digital / analog conversion circuit section 22.
By separately arranging and on the front and back of the printed circuit board 40 and electromagnetically shielding by the earth pattern, mutual interference between the video signal and the audio signal can be more effectively reduced.

In FIG. 3B, at least one other intermediate layer sandwiched between the surface layer 41 and the intermediate layer 43 on which the ground pattern is provided, and in FIG. 3B, for example, the intermediate layer 42. In addition, a power supply pattern relating to the connection of the receiving side power supply circuit unit 27 with each circuit unit that supplies power is provided. The receiving side power supply circuit unit 27 and the power supply pattern are connected by through holes (not shown).

That is, the video signal digital / analog conversion circuit section 21, the high frequency receiving circuit section 24 and the receiving side control circuit section 25 provided on the front surface layer 41, and the audio signal digital / analog provided on the back surface layer 46. Conversion circuit unit 22, reception signal processing circuit unit 23, reception side reference signal generation circuit unit 26
And the receiving-side power supply circuit section 27 are electromagnetically doubly shielded by both the ground pattern provided on the intermediate layer 43 and the power supply pattern provided on the intermediate layer 42, whereby the printed circuit board 40 This further enhances the separation effect between the circuits arranged on both the front and back sides.

Therefore, the high frequency receiving circuit section 24 and the received signal processing circuit section 23 for handling digital signals are separately arranged on the front and back sides of the printed circuit board 40, and further, the two patterns of the ground pattern and the power source pattern are used to electromagnetically doubly electromagnetically. By shielding, the digital signal noise generated from the reception signal processing circuit unit 43 can be more effectively reduced from being mixed into the high frequency reception circuit unit 24.

Further, the high frequency receiving circuit section 24 and the receiving side reference signal generating circuit section 26 for generating the reference signal (for example, 44 MHz) are separately disposed on the front and back of the printed circuit board 40.
Further, by double electromagnetic shielding by both the ground pattern and the power source pattern, a reference signal (for example, 4
(4 MHz) and its harmonic component noise can be more effectively reduced from being mixed into the high frequency receiving circuit section 24.

The high frequency receiving circuit section 24 and the receiving side power supply circuit section 27 are separately arranged on the front and back of the printed circuit board 40.
Further, by double electromagnetic shielding by both the ground pattern and the power supply pattern, it is possible to more effectively reduce the power supply noise generated from the reception side power supply circuit unit 27 from being mixed into the high frequency reception circuit unit 24. Furthermore, external power source noise from an external power source (not shown) to which the receiving side power source circuit unit 27 is connected causes high frequency receiving circuit unit 24.
It can be more effectively reduced to be mixed in the.

Further, the video signal digital / analog conversion circuit section 21 and the audio signal digital / analog conversion circuit section 22.
And 2 are separately disposed on the front and back of the printed circuit board 40, and are further electromagnetically shielded by both the ground pattern and the power source pattern, so that mutual interference between a video signal and an audio signal can be more effectively performed. It can be reduced.

At least one of the other intermediate layers sandwiched between the back surface layer 46 and the intermediate layer 43 provided with the ground pattern in FIG. 3B, for example, the intermediate layer 45 in FIG. 3B. A signal pattern relating to the received signal processing circuit section 23 is arranged in the. The reception signal processing circuit section 23 and the signal pattern are connected by a through hole (not shown).

That is, by arranging the signal pattern relating to the received signal processing circuit section 23 that handles digital signals in the intermediate layer 45, the digital signal noise radiated from the signal pattern can be reduced.

FIG. 5 is a block circuit diagram showing a schematic configuration of the video wireless transmission / reception system according to the embodiment of the present invention. The video wireless transmission / reception system 1 of the present exemplary embodiment shown in FIG. 5 includes the video wireless transmitter 10 of the present exemplary embodiment described with reference to FIGS. 1 and 2, and the present exemplary embodiment described with reference to FIGS. 3 and 4. Video wireless receiver 20 of.

Therefore, with respect to the circuit configuration, the circuit operation and the arrangement of each circuit on the printed circuit board of each of the video wireless transmitter 10 and the video wireless receiver 20, the video wireless transmitter 10 is shown in FIGS. Video wireless receiver 20
Are the same as those described with reference to FIGS. 3 and 4, and the same numbers are assigned to the video wireless transmitter 10 and the video wireless receiver 2.
0 The individual description is omitted, and the system operation of the video wireless transmission / reception system 1 of FIG. 5 will be described below.

In the video wireless transmitter 10, for example, by connecting a video tape recorder or the like (not shown) to the input terminals 19a and 19b, the video signal and the audio signal of the video tape recorder or the like (not shown) are converted into high frequency signals. And transmits it to the video wireless receiver 20 installed at a place distant from the antenna 18.

In the video wireless receiver 20, the high frequency signal transmitted from the video wireless transmitter 10 is received by the antenna 28, converted into the original video signal and audio signal and output from the output terminals 29a, 29b. . Then, by connecting, for example, a television (not shown) to the output terminals 29a and 29b, the television or the like (not shown) installed at a place where the video and audio of the video tape recorder or the like (not shown) are separated from each other. ) Can be viewed at.

An outdoor antenna is connected to the video tape recorder or the like (not shown) to select a television broadcast in the video tape recorder or the like (not shown), and a video signal of the selected television broadcast and If the audio signal is output, the television broadcast can be viewed on the television or the like (not shown) even in a place where the television signal cannot be properly received indoors.

As a communication system between the video wireless transmitter 10 and the video wireless receiver 20, for example, the frequency band of the high frequency signal is the 2.4 GHz band, and the spread spectrum (Spread Spectrum) technique is used. Generally, in a communication method using spread spectrum technology, an input baseband signal such as an analog video signal and an analog audio signal is modulated on the transmitting side, spread spectrum is spread using a spread code, and then transmitted as a high frequency signal. It Then, the spread spectrum signal received at the receiving side is demodulated (despread) using the same spreading code as that at the transmitting side, and becomes the original analog video signal and analog audio signal.

Next, a schematic diagram showing the arrangement of each circuit on the printed circuit board 30 of the video wireless transmitter 10 of FIG. 1 and the arrangement of each circuit on the printed circuit board 40 of the video wireless receiver 20 of FIG. The arrangement of each of these circuits will be described below with reference to the schematic diagram showing the configuration. The arrangement of each circuit on the printed circuit board 30 of the video wireless transmitter 10 in FIG. 1 is compared with the arrangement of each circuit on the printed circuit board 40 of the video wireless receiver 20 in FIG.

The printed circuit board 30 of FIG. 1A and FIG.
On one surface of each of the printed circuit boards 40 of (a), the video signal analog / digital conversion circuit unit 11 is the video signal digital / analog conversion circuit unit 21, the high frequency transmission circuit unit 14 is the high frequency reception circuit unit 24, and the transmission side. The control circuit section 15 is arranged at the same position corresponding to each of the receiving side control circuit sections 25.

On the other surface of each of the printed circuit board 30 of FIG. 1C and the printed circuit board 40 of FIG. 3C, the audio signal analog / digital conversion circuit section 12 has the audio signal digital / analog conversion circuit section 22. In addition, the transmission signal processing circuit unit 13 is provided in the reception signal processing circuit unit 23, and the transmission side reference signal generation circuit unit 16 is provided in the reception side reference signal generation circuit unit 26.
Further, the transmission side power supply circuit section 17 is arranged at the same position corresponding to the reception side power supply circuit section 27, respectively.

In the arrangement of the patterns in the plurality of intermediate layers of the printed circuit board 30 of FIG. 1B and the printed circuit board 40 of FIG. 3B, the ground pattern of the intermediate layer 33 is the ground pattern of the intermediate layer 43. The intermediate layer 32
The power source pattern of No. 1 corresponds to the power source pattern of the intermediate layer 42, and the signal pattern of the intermediate layer 35 corresponds to the signal pattern of the intermediate layer 45.

As described above, in the video wireless transmitter 10 and the video wireless receiver 20, the circuit board having the function corresponding to each of the transmitting side and the receiving side is provided on the printed circuit board 3.
By arranging 0 and the printed circuit board 40 so as to correspond to the same position, respectively, the design can be made common.

[0107]

As described above, according to the present invention, a video signal analog / digital conversion circuit section for converting an input analog video signal into a digital video signal, and an input analog audio signal into a digital audio signal. Audio signal analog / digital conversion circuit unit, transmission signal processing circuit unit for converting the digital video signal and digital audio signal into a packetized transmission baseband signal, and high frequency transmission for converting the transmission baseband signal into a high frequency signal A circuit section, a transmission side control circuit section that controls the operation of the transmission signal processing circuit section, a transmission side reference signal generation circuit section that generates a reference signal related to the transmission signal processing circuit section and the high frequency transmission circuit section, and A wireless power transmitter for video transmission, in which a power supply side power supply circuit unit that supplies power to each circuit unit is provided on both front and back surfaces of a substantially rectangular printed circuit board. A video signal analog / digital conversion circuit unit, a high frequency transmission circuit unit and a transmission side control circuit unit are provided on one surface of the printed circuit board, and the audio signal is provided on the other surface of the printed circuit board. A signal analog / digital conversion circuit section, a transmission signal processing circuit section, a transmission side reference signal generation circuit section, and a transmission side power supply circuit section are arranged.

Therefore, according to the present invention, by arranging the high frequency transmission circuit section and the transmission signal processing circuit section for handling digital signals separately on the front and back of the printed circuit board, the digital signal generated from the transmission signal processing circuit section can be obtained. It is possible to reduce mixing of noise into the high frequency transmission circuit unit.

Further, by disposing the high-frequency transmission circuit section and the transmission-side reference signal generation circuit section for generating the reference signal separately on the front and back of the printed circuit board, the reference signal generated from the transmission-side reference signal generation circuit section can be obtained. It is possible to reduce mixing of a signal and its harmonic component noise into the high frequency transmission circuit section.

By disposing the high-frequency transmission circuit section and the transmission-side power supply circuit section separately on the front and back of the printed circuit board, power supply noise generated from the transmission-side power supply circuit section is mixed into the high-frequency transmission circuit section. Can be reduced.
Further, it is possible to reduce mixing of external power supply noise from the external power supply to which the transmission side power supply circuit unit is connected to the high frequency transmission circuit unit.

By disposing the video signal analog / digital conversion circuit section and the audio signal analog / digital conversion circuit section separately on the front and back of the printed circuit board, mutual interference between the video signal and the audio signal is prevented. It can be reduced.

That is, as described above, the mutual interference of signals between the circuits and the mixing of different signals and noise from other circuits are reduced to prevent the loss of communication signals and the deterioration of the error rate. A video wireless transmitter capable of excellently transmitting video and audio can be provided.

Further, according to the present invention, the high-frequency transmission circuit section is disposed on one surface of the printed circuit board in the vicinity of the first side of the printed circuit board, and the second side adjacent to the first side is arranged. Of the third side adjacent to the first side and the first side of the third side adjacent to the first side. It is characterized in that the video signal analog-digital conversion circuit section is disposed in proximity to both sides of a fourth side facing the side.

Therefore, according to the present invention, on one surface of the printed circuit board, the high frequency transmission circuit section is on the first side, and the transmission side control circuit section and the video signal analog / digital conversion circuit section are the first side. The digital signal noise generated from the transmission side control circuit unit and the video signal analog / digital conversion circuit unit is mixed into the high frequency transmission circuit unit by separately disposing on the fourth side opposite to the first side. Can be reduced.

That is, as described above, a video wireless transmitter capable of transmitting video and audio satisfactorily by preventing the loss of communication signals and the deterioration of the error rate by reducing the mixing of noise between the circuits. Can be provided.

Further, according to the present invention, on the other surface of the printed circuit board, the transmission signal processing circuit section is arranged close to the first side of the printed circuit board, and the transmission signal processing circuit section is adjacent to the first side. The transmission-side reference signal generating circuit section is disposed at one corner sandwiched between the second side and the fourth side facing the first side, and the third side adjacent to the first side and the third side. The transmission side power supply circuit section is disposed at one corner sandwiched between a fourth side facing the first side and the fourth side sandwiched by the transmission side reference signal generating circuit section and the transmission side power supply circuit section. The audio signal analog / digital conversion circuit section is disposed in the vicinity of the side.

Therefore, according to the present invention, on the other surface of the printed circuit board, the transmission signal processing circuit section faces the first side and the audio signal analog-digital conversion circuit section faces the first side. By arranging them separately on the fourth side, the digital signal noise generated from the transmission signal processing circuit unit can be reduced from being mixed into the audio signal analog-digital conversion circuit unit.

By separately disposing the transmission signal processing circuit section on the first side a side and the transmission side power supply circuit section on the fourth side side facing the first side, respectively, Digital signal noise generated from the transmission signal processing circuit unit can reduce leakage to an external power source connected to the transmission side power source circuit unit via the transmission side power source circuit unit, and external power source noise from the external power source can be reduced. It is possible to reduce mixing in the transmission signal processing circuit unit.

Further, the transmitting side reference signal generating circuit section is arranged at one corner sandwiched between the second side and the fourth side, and the transmitting side power supply circuit section is arranged at the third side and the fourth side. The transmitting side reference signal generating circuit section is disposed at a corner sandwiched between the transmitting side reference signal generating circuit section and the transmitting side reference signal generating circuit section by maximizing the distance between the transmitting side reference signal generating circuit section and the transmitting side power supply circuit section on the fourth side. It is possible to reduce the leakage of the reference signal and its harmonic component noise generated from the external power source connected to the transmission side power source circuit section via the transmission side power source circuit section, and to reduce the external power source noise from the external power source. Can be reduced from being mixed into the transmitting side reference signal generating circuit section.

That is, as described above, video and audio can be satisfactorily transmitted by reducing the mixing of different signals and noise from other circuits to prevent the loss of communication signals and the deterioration of the error rate. A wireless transmitter can be provided.

Further, according to the present invention, the printed board is a laminated board including a surface layer, a plurality of intermediate layers, and a back surface layer, and the surface layer includes the video signal analog / digital conversion circuit section and a high frequency wave. A transmission circuit section and a transmission side control circuit section are provided, and the voice signal analog / digital conversion circuit section, a transmission signal processing circuit section, a transmission side reference signal generation circuit section, and a transmission side power supply circuit section are provided on the back surface layer. The ground pattern relating to each of the circuit portions is disposed on at least one of the plurality of intermediate layers.

Therefore, according to the present invention, the video signal analog-digital conversion circuit section, the high frequency transmission circuit section and the transmission side control circuit section provided on the front surface layer, and the video signal analog-digital conversion circuit section and the transmission side control circuit section provided on the back surface layer. Printing is performed by electromagnetically shielding the voice signal analog / digital conversion circuit unit, the transmission signal processing circuit unit, the transmission side reference signal generation circuit unit, and the transmission side power supply circuit unit by the earth pattern arranged in the intermediate layer. This further enhances the separation effect between the circuits arranged on both front and back surfaces of the substrate.

Therefore, the high-frequency transmission circuit section and the transmission signal processing circuit section for handling digital signals are separately arranged on the front and back of the printed circuit board, and are further electromagnetically shielded by the earth pattern, whereby the transmission signal processing circuit section is provided. It is possible to more effectively reduce the mixing of digital signal noise generated from the high frequency transmission circuit unit.

Further, the high-frequency transmission circuit section and the transmission-side reference signal generation circuit section for generating the reference signal are separately arranged on the front and back sides of a printed circuit board, and are further electromagnetically shielded by the earth pattern to transmit the transmission signal. It is possible to more effectively reduce the mixing of the reference signal generated by the side reference signal generation circuit unit and its harmonic component noise into the high frequency transmission circuit unit.

Further, by separately disposing the high-frequency transmission circuit section and the transmission-side power supply circuit section on the front and back of the printed circuit board, and by electromagnetically shielding by the earth pattern,
It is possible to more effectively reduce the power supply noise generated from the transmission side power supply circuit unit from being mixed into the high frequency transmission circuit unit. Furthermore, it is possible to more effectively reduce the mixing of external power supply noise from the external power supply to which the transmission side power supply circuit unit is connected to the high frequency transmission circuit unit.

Further, the video signal analog / digital conversion circuit section and the audio signal analog / digital conversion circuit section are separately arranged on the front and back of the printed circuit board, and are further electromagnetically shielded by the ground pattern, so that the video signal Mutual interference with an audio signal can be reduced more effectively.

That is, as described above, the mutual interference of signals between the circuits and the mixing of different signals and noise from other circuits are effectively reduced to prevent the loss of communication signals and the deterioration of the error rate. By doing so, it is possible to provide a video wireless transmitter that can better transmit video and audio.

Further, according to the present invention, the power supply circuit section on the transmitting side supplies power to at least one of the other intermediate layers sandwiched between the surface layer and the intermediate layer on which the ground pattern is provided. It is characterized in that a power supply pattern relating to the connection with the circuit portion is provided.

Therefore, according to the present invention, the video signal analog-digital conversion circuit section, the high frequency transmission circuit section and the transmission side control circuit section provided on the front surface layer, and the video signal analog-digital conversion circuit section and the transmission side control circuit section provided on the back surface layer. An audio signal analog / digital conversion circuit unit, a transmission signal processing circuit unit, a transmission side reference signal generation circuit unit, and a transmission side power supply circuit unit are disposed on the earth pattern and the intermediate layer disposed on the intermediate layer. The electromagnetic shielding is doubled by the two patterns of the power source pattern, thereby further enhancing the separating effect between the circuits arranged on both front and back surfaces of the printed circuit board.

Therefore, the high-frequency transmission circuit section and the transmission signal processing circuit section for handling digital signals are separately arranged on the front and back sides of the printed circuit board, and further, the two patterns of the ground pattern and the power source pattern are used to electromagnetically shield them from each other. By doing so, it is possible to more effectively reduce the mixing of digital signal noise generated from the transmission signal processing circuit unit into the high frequency transmission circuit unit.

Further, the high frequency transmitting circuit section and the transmitting side reference signal generating circuit section for generating the reference signal are separately arranged on the front and back sides of the printed circuit board, and further, two patterns are provided by both the ground pattern and the power source pattern. Due to the heavy electromagnetic shielding, it is possible to more effectively reduce the mixing of the reference signal and its harmonic component noise generated by the transmitting side reference signal generating circuit section into the high frequency transmitting circuit section.

Further, by separately disposing the high-frequency transmission circuit section and the transmission-side power supply circuit section on the front and back sides of the printed circuit board, and further by electromagnetically shielding them by both the ground pattern and the power supply pattern, It is possible to more effectively reduce the power supply noise generated from the transmission side power supply circuit unit from being mixed into the high frequency transmission circuit unit. further,
External power supply noise from the external power supply to which the transmission side power supply circuit unit is connected can be more effectively reduced from being mixed into the high frequency transmission circuit unit.

Further, the video signal analog / digital conversion circuit section and the audio signal analog / digital conversion circuit section are separately arranged on the front and back of the printed circuit board, and two patterns are provided by both the ground pattern and the power supply pattern.
The heavy electromagnetic shielding can more effectively reduce the mutual interference between the video signal and the audio signal.

That is, as described above, it is possible to more effectively reduce the mutual interference of signals between the circuits and the mixing of different signals and noise from other circuits, so that the loss of the communication signal and the deterioration of the error rate are reduced. By preventing, it is possible to provide a video wireless transmitter capable of transmitting video and audio even better.

According to the present invention, the signal pattern relating to the transmission signal processing circuit section is arranged on at least one of the other intermediate layers sandwiched between the back surface layer and the intermediate layer on which the ground pattern is provided. It is characterized by being installed.

Therefore, according to the present invention, the digital signal noise radiated from the signal pattern is reduced by disposing the signal pattern relating to the transmission signal processing circuit section that handles digital signals in the intermediate layer. You can

That is, as described above, a video wireless transmitter capable of transmitting video and audio satisfactorily by preventing the loss of communication signals and the deterioration of the error rate by reducing the mixing of noise between the circuits. Can be provided.

The present invention also includes a high-frequency receiving circuit section for converting an input high-frequency signal into a packetized reception baseband signal, and a digital video signal and a digital signal based on the packetized reception baseband signal. Received signal processing circuit unit for converting to an audio signal, video signal digital / analog conversion circuit unit for converting the digital video signal to an analog video signal, and audio signal digital / analog conversion for converting the digital audio signal to an analog audio signal A circuit section, a reception side control circuit section that controls the operation of the reception signal processing circuit section, a reception side reference signal generation circuit section that generates a reference signal related to the reception signal processing circuit section and the high-frequency receiving path section, and A video circuit that has a receiving side power supply circuit section that supplies power to each circuit section on both front and back sides of a substantially rectangular printed circuit board. In the receiver, the high frequency receiving circuit unit, the video signal digital-analog conversion circuit unit and the receiving side control circuit unit are arranged on one surface of the printed circuit board, and the other surface of the printed circuit board is A reception signal processing circuit unit, a voice signal digital / analog conversion circuit unit, a reception side reference signal generation circuit unit, and a reception side power supply circuit unit are arranged.

Therefore, according to the present invention, the high frequency receiving circuit section and the received signal processing circuit section for handling a digital signal are separately arranged on the front and back sides of the printed circuit board.
It is possible to reduce mixing of digital signal noise generated from the reception signal processing circuit unit into the high frequency reception circuit unit.

Further, the high-frequency receiving circuit section and the receiving-side reference signal generating circuit section for generating the reference signal are separately arranged on the front and back sides of the printed circuit board to generate the receiving-side reference signal generating circuit section. It is possible to reduce mixing of the reference signal and its harmonic component noise into the high frequency receiving circuit section.

Further, by disposing the high-frequency receiving circuit section and the receiving-side power supply circuit section separately on the front and back of the printed circuit board, the power-supply noise generated from the receiving-side power supply circuit section is mixed into the high-frequency receiving circuit section. Can be reduced.
Further, it is possible to reduce mixing of external power source noise from the external power source to which the receiving side power source circuit unit is connected to the high frequency receiving circuit unit.

By disposing the video signal digital / analog conversion circuit section and the audio signal digital / analog conversion circuit section separately on the front and back of the printed circuit board, mutual interference between the video signal and the audio signal is prevented. It can be reduced.

That is, as described above, the mutual interference of signals between the circuits and the mixing of different signals and noise from other circuits are reduced to prevent the loss of communication signals and the deterioration of the error rate. A video wireless receiver that can favorably receive video and audio can be provided.

Further, according to the present invention, the high-frequency receiving circuit portion is disposed on one surface of the printed board in proximity to the first side of the printed board, and the second side adjacent to the first side. And the third side adjacent to the first side and the first side, the receiving-side control circuit unit is disposed close to both sides of the fourth side and the fourth side opposite to the first side. It is characterized in that the video signal digital-analog conversion circuit section is disposed close to both sides of the fourth side facing the side.

Therefore, according to the present invention, on one surface of the printed circuit board, the high-frequency receiving circuit section is on the first side, and the receiving-side control circuit section and the video signal digital-analog conversion circuit section are on the first side. The digital signal noise generated from the receiving side control circuit unit and the video signal digital / analog conversion circuit unit is mixed into the high frequency receiving circuit unit by separately disposing on the fourth side opposite to the first side. Can be reduced.

That is, as described above, a video wireless receiver capable of transmitting video and audio satisfactorily by preventing the loss of communication signals and the deterioration of the error rate by reducing the mixing of noise between the circuits. Can be provided.

Further, according to the present invention, on the other surface of the printed circuit board, the received signal processing circuit section is arranged close to the first side of the printed circuit board, and the received signal processing circuit section is adjacent to the first side. The reception-side reference signal generating circuit section is disposed at one corner sandwiched between the second side and the fourth side opposite to the first side, and the third side adjacent to the first side and the third side. The receiving side power supply circuit section is disposed at one corner sandwiched between a fourth side facing the first side and the fourth side sandwiched by the receiving side reference signal generating circuit section and the receiving side power supply circuit section. The audio signal digital-analog conversion circuit section is disposed in the vicinity of the side.

Therefore, according to the present invention, on the other surface of the printed circuit board, the reception signal processing circuit section faces the first side and the audio signal digital-analog conversion circuit section faces the first side. By arranging them separately on the fourth side, the digital signal noise generated from the received signal processing circuit unit can be reduced from being mixed into the audio signal digital-analog conversion circuit unit.

The reception signal processing circuit section is on the first side and the reception side power supply circuit section is on the fourth side.
The digital signal noise generated from the reception signal processing circuit unit is leaked to the external power source connected to the reception side power supply circuit unit via the reception side power supply circuit unit by separately arranging on the side of It is possible to reduce the noise and the external power supply noise from the external power supply to be mixed into the received signal processing circuit unit.

Further, the receiving side reference signal generating circuit section is arranged at one corner sandwiched between the second side and the fourth side, and the receiving side power supply circuit section is arranged at the third side and the fourth side. The receiving side reference signal generating circuit section is disposed at one corner sandwiched between the receiving side reference signal generating circuit section and the receiving side power source circuit section by maximizing the distance between the receiving side reference signal generating circuit section and the receiving side power supply circuit section. It is possible to reduce the leakage of the reference signal and its harmonic component noise generated from the external power source connected to the receiving side power source circuit section via the receiving side power source circuit section, and the external power source noise from the external power source is reduced. It is possible to reduce mixing in the reception side reference signal generating circuit section.

That is, as described above, video and audio can be satisfactorily transmitted by reducing the mixing of different signals and noise from other circuits to prevent the loss of communication signals and the deterioration of the error rate. A wireless receiver can be provided.

According to the present invention, the printed board is a laminated board including a front surface layer, a plurality of intermediate layers, and a back surface layer, and the high frequency receiving circuit section, the video signal digital analog are provided on the front surface layer. A conversion circuit unit and a reception side control circuit unit are provided, and the reception signal processing circuit unit, a voice signal digital / analog conversion circuit unit, a reception side reference signal generation circuit unit, and a reception side power supply circuit unit are provided on the back surface layer. The ground pattern relating to each of the circuit portions is disposed on at least one of the plurality of intermediate layers.

Therefore, according to the present invention, the video signal digital-analog conversion circuit section, the high frequency receiving circuit section and the receiving side control circuit section provided on the front surface layer, and the video signal digital-analog converting circuit section provided on the back surface layer. Printing is performed by electromagnetically shielding the voice signal digital / analog conversion circuit unit, the reception signal processing circuit unit, the reception side reference signal generation circuit unit, and the reception side power supply circuit unit by the earth pattern arranged in the intermediate layer. This further enhances the separation effect between the circuits arranged on both front and back surfaces of the substrate.

Therefore, the high-frequency receiving circuit section and the receiving signal processing circuit section for handling digital signals are separately disposed on the front and back of the printed circuit board, and are further electromagnetically shielded by the earth pattern, whereby the receiving signal processing circuit section is provided. It is possible to more effectively reduce the mixing of digital signal noise generated by the above into the high frequency receiving circuit unit.

Further, the high frequency receiving circuit section and the receiving side reference signal generating circuit section for generating the reference signal are separately arranged on the front and back sides of a printed circuit board, and are further electromagnetically shielded by the earth pattern to thereby receive the signal. It is possible to more effectively reduce the mixing of the reference signal generated by the side reference signal generating circuit unit and its harmonic component noise into the high frequency receiving circuit unit.

Further, the high-frequency receiving circuit section and the receiving-side power supply circuit section are separately arranged on the front and back of the printed circuit board, and are further electromagnetically shielded by the earth pattern.
It is possible to more effectively reduce the power supply noise generated from the reception side power supply circuit unit from being mixed into the high frequency reception circuit unit. Further, it is possible to more effectively reduce the external power source noise from the external power source to which the receiving side power source circuit unit is connected, mixed into the high frequency receiving circuit unit.

Further, the video signal digital / analog conversion circuit section and the audio signal digital / analog conversion circuit section are separately arranged on the front and back of the printed circuit board, and are further electromagnetically shielded by the earth pattern, so that the video signal Mutual interference with an audio signal can be reduced more effectively.

That is, as described above, the mutual interference of signals between circuits and the mixing of different signals and noise from other circuits are effectively reduced to prevent the loss of communication signals and the deterioration of the error rate. By doing so, it is possible to provide a video wireless receiver that can better transmit video and audio.

According to the present invention, the receiving side power supply circuit section supplies power to at least one of the other intermediate layers sandwiched between the surface layer and the intermediate layer on which the ground pattern is provided. It is characterized in that a power supply pattern relating to the connection with the circuit portion is provided.

Therefore, according to the present invention, the video signal digital-analog conversion circuit section, the high frequency receiving circuit section and the receiving side control circuit section provided on the front surface layer, and the video signal digital-analog converting circuit section provided on the back surface layer. An audio signal digital / analog conversion circuit unit, a reception signal processing circuit unit, a reception side reference signal generation circuit unit, and a reception side power supply circuit unit are disposed on the earth pattern and the intermediate layer disposed on the intermediate layer. The electromagnetic shielding is doubled by the two patterns of the power source pattern, thereby further enhancing the separating effect between the circuits arranged on both front and back surfaces of the printed circuit board.

Therefore, the high-frequency receiving circuit section and the received signal processing circuit section for handling digital signals are separately arranged on the front and back of the printed circuit board, and further, the two patterns of the earth pattern and the power source pattern are used to electromagnetically shield them from each other. By doing so, it is possible to more effectively reduce the mixing of digital signal noise generated from the reception signal processing circuit unit into the high frequency reception circuit unit.

Further, the high frequency receiving circuit section and the receiving side reference signal generating circuit section for generating the reference signal are separately arranged on the front and back of the printed circuit board, and further, two patterns are provided by both the ground pattern and the power source pattern. Due to the heavy electromagnetic shielding, it is possible to more effectively reduce the mixing of the reference signal generated by the receiving side reference signal generating circuit section and its harmonic component noise into the high frequency receiving circuit section.

Further, the high frequency receiving circuit section and the receiving side power supply circuit section are separately arranged on the front and back of the printed circuit board, and are further electromagnetically shielded by both the ground pattern and the power supply pattern. It is possible to more effectively reduce the power supply noise generated from the reception side power supply circuit unit from being mixed into the high frequency reception circuit unit. further,
The external power supply noise from the external power supply to which the reception side power supply circuit unit is connected can be more effectively reduced from being mixed into the high frequency reception circuit unit.

Further, the video signal digital-analog conversion circuit section and the audio signal digital-analog conversion circuit section are separately arranged on the front and back of the printed circuit board, and further, two patterns are provided by both the ground pattern and the power supply pattern.
The heavy electromagnetic shielding can more effectively reduce the mutual interference between the video signal and the audio signal.

That is, as described above, it is possible to more effectively reduce the mutual interference of signals between the circuits and the mixing of different signals and noise from other circuits. By preventing, it is possible to provide a video wireless receiver capable of transmitting video and audio even better.

Further, according to the present invention, the signal pattern relating to the received signal processing circuit section is arranged on at least one of the other intermediate layers sandwiched between the back surface layer and the intermediate layer on which the ground pattern is provided. It is characterized by being installed.

Therefore, according to the present invention, the digital signal noise radiated from the signal pattern is reduced by disposing the signal pattern relating to the received signal processing circuit section that handles digital signals in the intermediate layer. You can

That is, as described above, a video wireless receiver capable of transmitting video and audio satisfactorily by preventing the loss of communication signals and the deterioration of the error rate by reducing the mixing of noise between the circuits. Can be provided.

The video wireless transmission / reception system of the present invention is characterized by comprising the video wireless transmitter and the video wireless receiver.

Therefore, according to the present invention, in each of the video wireless transmitter and the video wireless receiver, as described above, mutual interference of signals between the circuits and mixing of different signals and noise from other circuits are reduced. As a result, it is possible to provide a video wireless transmission / reception system capable of favorably transmitting video and audio by preventing the loss of communication signals and the deterioration of error rate.

Further, as described above, in the video wireless transmitter and the video wireless receiver, the circuit blocks having the corresponding functions on the transmitting side and the receiving side are arranged at the same positions on the respective printed circuit boards. This makes it possible to standardize the design.

[Brief description of drawings]

FIG. 1 is a schematic view showing an arrangement of each circuit on a printed circuit board of a video wireless transmitter according to an embodiment of the present invention,
(A) is a plan view seen from one side of the printed circuit board, (b) is an enlarged sectional view of a part of the printed circuit board, and (c) is seen from the other side of the printed circuit board. It is a top view.

FIG. 2 is a block circuit diagram showing a schematic configuration of a video wireless transmitter according to the embodiment of the present invention.

FIG. 3 is a schematic view showing an arrangement of each circuit on a printed circuit board of the video wireless receiver according to the embodiment of the present invention;
(A) is a plan view seen from one side of the printed circuit board, (b) is an enlarged sectional view of a part of the printed circuit board, and (c) is seen from the other side of the printed circuit board. It is a top view.

FIG. 4 is a block circuit diagram showing a schematic configuration of a video wireless receiver according to an embodiment of the present invention.

FIG. 5 is a block circuit diagram showing a schematic configuration of a video wireless transmission / reception system according to an embodiment of the present invention.

FIG. 6 is a block circuit diagram showing a schematic configuration of a conventional video wireless transmission / reception system.

[Explanation of symbols]

1 Video wireless transmission / reception system 10 video wireless transmitter 11 Video signal analog / digital conversion circuit 12 Voice signal analog / digital conversion circuit 13 Transmission signal processing circuit section 14 High frequency transmitter circuit 15 Transmission side control circuit 16 Transmission side reference signal generation circuit 17 Transmitter power circuit 18 antenna 20 video wireless receiver 21 Video signal digital-analog conversion circuit section 22 Audio signal digital-analog conversion circuit section 23 Received Signal Processing Circuit Section 24 High frequency receiving circuit 25 Receiving side control circuit 26 Reception side reference signal generation circuit section 27 Power supply circuit on receiving side 28 antenna 30 printed circuit boards 30a first side 30b second side 30c Third side 30d Fourth side 31 surface layer 32 Middle layer (power supply pattern) 33 Middle layer (earth pattern) 34 Middle class 35 middle layer (signal pattern) 36 Back Layer 40 printed circuit board 40a first side 40b second side 40c Third side 40d Fourth side 41 surface layer 42 Middle layer (power supply pattern) 43 Middle layer (earth pattern) 44 Middle class 45 Middle layer (signal pattern) 46 Back layer

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5C025 AA01 AA25 AA28 AA29 BA30                       DA01                 5K052 AA11 BB02 BB07 DD19 FF38

Claims (13)

[Claims] 1. A video signal analog / digital conversion circuit unit for converting an input analog video signal into a digital video signal, and an audio signal analog / digital conversion circuit unit for converting an input analog audio signal into a digital audio signal. A transmission signal processing circuit unit for converting the digital video signal and the digital audio signal into a packetized transmission baseband signal, a high frequency transmission circuit unit for converting the transmission baseband signal into a high frequency signal, and the transmission signal processing circuit Side control circuit section for controlling the operation of the section, a transmission side reference signal generation circuit section for generating a reference signal relating to the transmission signal processing circuit section and the high frequency transmission circuit section, and a transmission for supplying power to each of the circuit sections A video wireless transmitter having a side power supply circuit section provided on both front and back surfaces of a substantially rectangular printed circuit board. On one surface of the substrate, the video signal analog-digital conversion circuit, a high frequency transmission circuit and the transmission-side control circuit unit is disposed on the other surface of the printed circuit board,
A video wireless transmitter comprising the audio signal analog / digital conversion circuit unit, a transmission signal processing circuit unit, a transmission side reference signal generation circuit unit, and a transmission side power supply circuit unit. 2. On one surface of the printed circuit board,
The high-frequency transmission circuit section is arranged close to the first side of the printed circuit board, and both sides of a second side adjacent to the first side and a fourth side facing the first side. The transmission side control circuit section is disposed in proximity to the video signal, and the video signal is disposed in proximity to both sides of a third side adjacent to the first side and a fourth side opposite to the first side. 2. The video wireless transmitter according to claim 1, further comprising an analog / digital conversion circuit section. 3. On the other surface of the printed circuit board,
The transmission signal processing circuit unit is disposed in proximity to the first side of the printed circuit board, and includes a second side adjacent to the first side and a fourth side facing the first side. The transmission side reference signal generating circuit section is disposed in one corner sandwiched, and in one corner sandwiched by a third side adjacent to the first side and a fourth side facing the first side. The transmission side power supply circuit section is disposed, and is sandwiched between the transmission side reference signal generation circuit section and the transmission side power supply circuit section, and the audio signal analog-digital conversion circuit section is disposed close to the fourth side. The video wireless transmitter according to claim 1, wherein the video wireless transmitter is provided. 4. The printed board is a laminated board including a front surface layer, a plurality of intermediate layers, and a back surface layer, and the video signal analog / digital conversion circuit unit, the high frequency transmission circuit unit, and the high frequency transmission circuit unit on the front surface layer. A transmission side control circuit unit is provided, and the voice signal analog / digital conversion circuit unit is provided on the back surface layer.
A transmission signal processing circuit unit, a transmission side reference signal generation circuit unit, and a transmission side power supply circuit unit are arranged, and an earth pattern for each circuit unit is arranged in at least one layer of the plurality of intermediate layers. The video wireless transmitter according to any one of claims 1 to 3, characterized in that: 5. A circuit unit for supplying power from the power supply circuit unit on the transmitting side to at least one of the other intermediate layers sandwiched between the surface layer and the intermediate layer provided with the ground pattern. The video wireless transmitter according to claim 4, wherein a power supply pattern for connection is provided. 6. A signal pattern relating to the transmission signal processing circuit unit is disposed on at least one of the other intermediate layers sandwiched between the back surface layer and the intermediate layer on which the earth pattern is disposed. The video wireless transmitter according to claim 4 or 5, characterized in that: 7. A high frequency receiving circuit unit for converting an input high frequency signal into a packetized reception baseband signal, and converting the packetized reception baseband signal into an original digital video signal and digital audio signal. A received signal processing circuit section, a video signal digital / analog conversion circuit section for converting the digital video signal into an analog video signal, and an audio signal digital / analog conversion circuit section for converting the digital audio signal into an analog audio signal, A receiving side control circuit section for controlling the operation of the receiving signal processing circuit section, a receiving side reference signal generating circuit section for generating a reference signal related to the receiving signal processing circuit section and the high frequency receiving path section, and each of the circuit sections. A video wireless receiver in which a power circuit on the receiving side for supplying power is arranged on both front and back sides of a substantially rectangular printed circuit board. The high-frequency receiving circuit unit, the video signal digital-analog conversion circuit unit, and the receiving-side control circuit unit are provided on one surface of the printed circuit board, and the received signal processing circuit unit is provided on the other surface of the printed circuit board. A video wireless receiver comprising: an audio signal digital-analog conversion circuit section, a reception side reference signal generation circuit section, and a reception side power supply circuit section. 8. On one surface of the printed circuit board,
The high-frequency receiving circuit unit is arranged close to the first side of the printed circuit board, and both sides of a second side adjacent to the first side and a fourth side facing the first side. The receiving side control circuit section is disposed in proximity to the video signal, and the video signal is disposed in proximity to both sides of a third side adjacent to the first side and a fourth side opposite to the first side. 8. The video wireless receiver according to claim 7, further comprising a digital-analog conversion circuit section. 9. On the other surface of the printed circuit board,
The reception signal processing circuit unit is disposed in the vicinity of the first side of the printed circuit board, and includes a second side adjacent to the first side and a fourth side facing the first side. The receiving-side reference signal generating circuit section is disposed in one corner sandwiched, and in one corner sandwiched by a third side adjacent to the first side and a fourth side facing the first side. The reception side power supply circuit section is arranged, and is sandwiched between the reception side reference signal generation circuit section and the reception side power supply circuit section, and the audio signal digital-analog conversion circuit section is arranged close to the fourth side. 9. The video wireless receiver according to claim 7, which is provided. 10. The printed circuit board is a laminated board including a front surface layer, a plurality of intermediate layers, and a back surface layer, and the high frequency receiving circuit unit, the video signal digital-analog conversion circuit unit, and the video signal digital-analog conversion circuit unit on the front surface layer. A receiving side control circuit section is provided, and the received signal processing circuit section, audio signal digital / analog conversion circuit section, receiving side reference signal generating circuit section and receiving side power supply circuit section are provided on the back surface layer, and 10. The video wireless receiver according to claim 7, wherein at least one of the intermediate layers is provided with a ground pattern associated with each of the circuit units. 11. At least one other intermediate layer sandwiched between the surface layer and the intermediate layer on which the ground pattern is provided.
11. The video wireless receiver according to claim 10, wherein the layer is provided with a power supply pattern relating to connection with each circuit unit for supplying power by the receiving side power supply circuit unit. 12. At least one of the other intermediate layers sandwiched between the back surface layer and the intermediate layer provided with the ground pattern.
12. A layer is provided with a signal pattern relating to the received signal processing circuit section,
Video wireless receiver described in. 13. A video wireless transmitter according to any one of claims 1 to 6 and a video wireless receiver according to any one of claims 7 to 12. A wireless video transmission / reception system characterized by.