JP2005117300A - Radio set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately set the gain of a radio part of a radio set for each frequency, to adjust the gain when it is desired to temporarily increase or decrease the gain after being set for each frequency, and to change the gain to a previously set value when the gain is to be returned to the value. <P>SOLUTION: This radio set is equipped with: a separating means of separating a plurality of signals of different frequencies; a plurality of gain varying means capable of varying the gains of the signals of the respective frequencies after separating the signals of the respective frequencies by the separating means; and a 1st voltage control means and a 2nd voltage control means of controlling the plurality of gain varying means. Adjustment to a desired gain is attained by controlling the 1st voltage control means and 2nd voltage control means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to gain adjustment of a radio unit of a radio device.

Here, the prior art will be described with respect to the adjustment to the set gain of each frequency when the signal of the frequency F1, the signal of the frequency F2, and the signal of the frequency F3, which are three frequency signals, enter the high frequency input section as inputs. Go.
4 (a) and 4 (b) show the configuration of the radio unit of a conventional radio device. First, 4 (a) in the figure will be described. 4A includes a high-frequency input unit 1, high-frequency amplifiers 2A and 2B, an electronic attenuator 3, a control voltage unit 4, and a high-frequency output unit 5.
When a signal of frequency F1, a signal of frequency F2, and a signal of frequency F3, which are three frequency signals, are input to the high frequency input section, the three frequency signals input to the high frequency input section 1 by the high frequency amplifier 2A. Is amplified. After being amplified, the signal of each frequency is adjusted to a gain set in advance for each frequency by the electronic attenuator 3. In FIG. 4 (a), the gain of the frequency F1 input to the high-frequency input unit is GF1, the gain of the frequency F2 is GF2, the gain of the frequency F3 is GF3, and the setting gain adjusted by the electronic attenuator for each frequency is the frequency F1. Is G1, the frequency F2 is G2, and the frequency F3 is G3. When the gain of the signal of each frequency is adjusted by the electronic attenuator 3, the adjustment is made to the set gain for each frequency by controlling the power control unit 4 that controls the power of the electronic attenuator. Next, the signal of each frequency adjusted to the set gain by the electronic attenuator 3 is amplified by the high frequency amplifier 2 </ b> B and output to the high frequency output unit 5. The above is the configuration of the wireless unit of the conventional wireless device and the flow of processing in the wireless unit.
4B is realized by replacing the electronic attenuator 3 shown in FIG. 4A with a variable gain amplifier. The process flow of FIG. 4B is the same as the process flow of the radio unit shown in FIG.

However, in the radio unit of the conventional radio, as shown in FIG. 4 (a), the transmission path for transmitting signals of a plurality of frequencies is the same, so the gain for each frequency is adjusted to the set gain by the electronic attenuator 3. It was difficult. For example, when the gain GF1 of the frequency F1 input to the high frequency input unit is adjusted to the set gain by the electronic attenuator and adjusted to GF1 = G1, the gain GF2 of the frequency F2 is larger than the gain set value G2 of the frequency F2. The gain GF3 of the band F3 is smaller than the gain setting value G3 of the frequency band F3, and it is difficult to adjust to the setting gain for each frequency.
Further, it is difficult to temporarily change the gain of only a signal of a specific frequency that is a test or the like, and after returning to the set gain after changing the gain.
The radio unit of the conventional radio shown in FIG. 4 (b) has the same problem as the radio shown in FIG. 4 (a).

  In order to solve the above problems, in the present invention, a separation unit that separates a plurality of signals having different frequencies, and a plurality of signals that can change the gain of each frequency signal after the separation unit separates each signal of each frequency. There is provided a radio device comprising: the gain variable means; and at least one voltage control means for controlling the plurality of gain variable means.

The present invention has a function of adjusting a set gain set for each frequency by an electronic attenuator corresponding to each frequency or a variable gain amplifier in a radio unit of a radio that transmits several different frequencies. Thus, it is possible to accurately set the gain for each frequency.
Further, when it is desired to temporarily increase or decrease the gain after setting the gain for each frequency, the gain can be adjusted by using a variable resistor with a center click that can adjust the control voltage. When returning the gain to a preset value, it is possible to change the gain to a preset value by returning the adjuster with the center click to a place where there is a click feeling.

  Here, as described in the prior art, the set gain of each frequency when the signal of frequency F1, the signal of frequency F2, and the signal of frequency F3, which are signals of three frequencies, enter the high frequency input unit as input. I will explain the adjustment to

A first embodiment of the present invention will be described with reference to FIG. It is a figure which shows the structure of the radio | wireless part of the radio | wireless machine in 1st Example of this invention. 1A shows a high-frequency input 1, high-frequency amplifiers 2A and 2B, a divider 11, three electronic attenuators 3A, 3B and 3C, a voltage control unit 4A, a low-pass filter 6A, a band-pass filter 6B and a high-pass filter 6C. And a high-frequency output 5. In this embodiment, when a signal of three frequencies, a signal of frequency F1, a signal of frequency F2, and a signal of frequency F3, enters the high frequency input 1 as an input, the signal of each frequency is amplified by the high frequency amplifier 2A. The signal amplified by the high-frequency amplifier 2A is sent to each filter via the distributor 11, and is separated for each frequency by the low-pass filter 6A, the band-pass filter 6B, and the high-pass filter 6C. The signal of each frequency separated by each filter is adjusted to a set gain by each electronic attenuator corresponding to each frequency. Here, the gain of the frequency F1 that has entered the high-frequency input unit 1 is GF1, the gain of the frequency 2 adjusted by each electronic attenuator is GF2, the gain of the frequency 3 is GF3, and each set gain of each frequency is set to G1. The frequency F2 is G2, and the frequency F3 is G3. The electronic attenuator corresponding to each frequency is assumed to be the electronic attenuator 3A for the frequency F1, the electronic attenuator 3B for the frequency F2, and the electronic attenuator 3C for the frequency F3.
Next, the signal of frequency F1, the signal of frequency F2, and the signal of frequency F3 separated by each filter are adjusted by each electronic attenuator so as to have a set gain of each frequency. When adjusting to the set gain of each frequency by each electronic attenuator, the gain is adjusted by controlling the voltage of each electronic attenuator by the voltage control unit 4A for controlling each voltage. Here, the voltage control unit 4A is composed of a variable resistor or a D / A converter, and controls the voltage.
Next, after the gain of each frequency signal is adjusted by each electronic attenuator, the frequency F1 is passed through the low pass filter 6A, the frequency F2 is passed through the band pass filter 6B, and the frequency F3 is passed through the high pass filter 6C. Are synthesized by the synthesizer 12, and the signals of each frequency synthesized by the synthesizer 12 are amplified by the high frequency amplifier 2 </ b> B and output to the high frequency output unit 5.
FIG. 1 (b) is realized by replacing each electronic attenuator of FIG. 1 (a) with a variable gain amplifier, and can perform the same processing as FIG. 1 (a).

In FIG. 1 (a), since the signal is separated for each frequency and an adjustment unit is provided for adjusting the set gain by the electronic attenuator for each signal of each frequency, the voltage of the electronic attenuator is controlled by the voltage control unit 4A. By controlling the above, it is possible to adjust the signal of each frequency to each set gain.
Also in FIG. 1B, the same processing and the same effect as in FIG. 1A can be obtained.

Here, the adjustment to the set gain of each frequency when the signal of the frequency F1, the signal of the frequency F2, and the signal of the frequency F3, which are three frequency signals, are input to the high frequency input unit will be described. . In addition, after adjusting the signal of each frequency to the set gain, only the gain of the frequency F3 is temporarily changed and the gain of the frequency F3 is returned to the set gain again.
A second embodiment of the present invention is shown in FIG. FIG. 2 (a1) shows a high-frequency input 1, high-frequency amplifiers 2A and 2B, a divider 11, electronic attenuators 3A, 3B and 3C, a voltage control adding unit 4B, a first voltage control unit 4C and a second control voltage unit 4D. , A low-pass filter 6A, a band-pass filter 6B, a high-pass filter 6C, a synthesizer 12, and a high-frequency output 5. In this embodiment, when a signal of three frequencies, a signal of frequency F1, a signal of frequency F2, and a signal of frequency F3, enters the high frequency input 1 as an input, the signal of each frequency is amplified by the high frequency amplifier 2A. The signal amplified by the high-frequency amplifier 2A is sent to each filter via the distributor 11, and is separated for each frequency by the low-pass filter 6A, the band-pass filter 6B, and the high-pass filter 6C. The signal of each frequency separated by each filter is adjusted to a set gain by each electronic attenuator corresponding to each frequency. Here, the gain of the frequency F1 that has entered the high frequency input unit 1 is GF1, the gain of the frequency 2 is GF2, the gain of the frequency 3 is GF3, and the set gains of each frequency are G1 for the frequency F1, G2 for the frequency F2, The frequency F3 is G3. The electronic attenuator corresponding to each frequency is assumed to be the electronic attenuator 3A for the frequency F1, the electronic attenuator 3B for the frequency F2, and the electronic attenuator 3C for the frequency F3.
Next, the signal of frequency F1, the signal of frequency F2, and the signal of frequency F3 separated by each filter are adjusted by each electronic attenuator so as to have a set gain of each frequency. When each electronic attenuator is adjusted to the set gain of each frequency, the voltage is adjusted by the voltage control adder 4B to adjust the gain. Here, the voltage control addition unit 4B adds the voltages of the first voltage control unit 4C and the second voltage control unit 4D, controls the voltage of each electronic attenuator by the added voltage, and controls each electronic attenuator. The first voltage control unit 4C is configured by a variable resistor or a D / A converter and controls the voltage. The second voltage control unit 4D performs control using a variable resistor with a center click. The variable resistor with a center click used in this embodiment has a click feeling at a preset initial value position, that is, the center position, and does not have a click feeling at other places.
Next, when controlling the voltage of each electronic attenuator, the second voltage control unit 4D is fixed in a state of a preset initial value, that is, in a state where there is a click feeling at the center position. The voltage of the second voltage control unit at this time is assumed to be V2. Since the voltage of the second voltage control unit 4D is fixed at the initial value, a fixed voltage value V2 is input to the voltage control addition unit 4B. For this reason, when adjusting the gain of the signal of each frequency to the set gain, the voltage is mainly controlled by the first voltage controller 4C. The control voltage of the first voltage control unit 4C is set to V1. The voltage control adder 4B adds the input voltages of the first voltage controller 4C and the second voltage controller 4D, and controls and adjusts each electronic attenuator with each voltage value based on the added voltage value. Let VA be the voltage after adding the voltage of the first voltage control unit 4C and the voltage of the second voltage control unit.
Next, after the gain of each frequency signal is adjusted by each electronic attenuator, the frequency F1 is passed through the low pass filter 6A, the frequency F2 is passed through the band pass filter 6B, and the frequency F3 is passed through the high pass filter 6C. Are synthesized by the synthesizer 12, and the signals of each frequency synthesized by the synthesizer 12 are amplified by the high frequency amplifier 2 </ b> B and output to the high frequency output unit 5.

Next, a case where the gain of the frequency band F3 is temporarily changed and the gain is returned to the set gain will be described. In this embodiment, the first voltage control unit 4C, the second voltage control unit 4D, and the voltage control addition unit 4B are provided as the configuration of the radio unit, so that the gain of a specific frequency is temporarily changed and the gain is again increased. To return to the set gain. Here, description will be made with reference to FIG.
As described above, after setting the gain GF3 of the frequency band F3 to the setting gain G3, if you want to increase or decrease the gain temporarily, or if you want to increase or decrease the setting gain G3 of the frequency F3 by α, make the adjustment earlier. The voltage value V1 of the first control voltage unit 4C is fixed, the second voltage control unit 4D is adjusted to V2 ± α1, and the voltage of the voltage control adding unit 4B is set to VA ± αA. Thus, the gain of the frequency F3 can be increased or decreased from the set gain G3 by α. When it is desired to finally return the gain of the frequency F3 to the set gain G3, the second voltage control unit 4D is set to the initial value by returning the second voltage control unit 4D to a place where the click feeling is present, that is, the center position. Returning to V2, since the first voltage control unit 4C is unchanged from V1, the control voltage of the control voltage adding unit 4B for adjusting the electronic attenuator returns to VA, and the gain also returns to the set gain G3 of the frequency F3. The second embodiment is effective when it is desired to increase or decrease the gain of each frequency individually after adjusting the gain of each frequency to the set gain. FIGS. 3 (b1) and 2 (b2) show the electronic attenuator described in FIGS. 2 (a1) and 2 (a2) replaced with a variable gain amplifier. 2 (b1) and FIG. 2 (b2) can be adjusted in gain by controlling in the same manner as in FIG. 2 (a1) and FIG. 2 (a2) as described above.

Here, the adjustment to the set gain of each frequency when the signal of the frequency F1, the signal of the frequency F2, and the signal of the frequency F3, which are three frequency signals, are input to the high frequency input unit will be described. .
A third embodiment is shown in FIG. 3A shows a high frequency input 1, high frequency amplifiers 2A and 2B, a divider 11, electronic attenuators 3A, 3B and 3C, a low pass filter 6A, a band pass filter 6B, a high pass filter 6C, a synthesizer 12, a high frequency output 5, It comprises a detector 10, amplifiers 2C, 2D, 2E, A / D converters 7A, 7B, 7C, a CPU 8, and D / A converters 9A, 9B, 9C. In this embodiment, when a signal of three frequencies, a signal of frequency F1, a signal of frequency F2, and a signal of frequency F3, enters the high frequency input 1 as an input, the signal of each frequency is amplified by the high frequency amplifier 2A. The signal amplified by the high-frequency amplifier 2A is sent to each filter via the distributor 11, and is separated for each frequency by the low-pass filter 6A, the band-pass filter 6B, and the high-pass filter 6C. The signal of each frequency separated by each filter is adjusted to a set gain by each electronic attenuator corresponding to each frequency. Here, the gain of the frequency F1 that has entered the high frequency input unit 1 is GF1, the gain of the frequency 2 is GF2, the gain of the frequency 3 is GF3, and the set gains of each frequency are G1 for the frequency F1, G2 for the frequency F2, The frequency F3 is G3. The electronic attenuator corresponding to each frequency is assumed to be the electronic attenuator 3A for the frequency F1, the electronic attenuator 3B for the frequency F2, and the electronic attenuator 3C for the frequency F3.
Next, the signal of frequency F1, the signal of frequency F2, and the signal of frequency F3 separated by each filter are adjusted by each electronic attenuator so as to have a set gain of each frequency. When adjusting to the set gain of each frequency by each electronic attenuator, the gain is adjusted by controlling the voltage of each electronic attenuator by the D / A converters 9A, 9B, and 9C. Each D / A converter is controlled by the CPU 8.
Next, after the gain of each frequency signal is adjusted by each electronic attenuator, the frequency F1 is passed through the low pass filter 6A, the frequency F2 is passed through the band pass filter 6B, and the frequency F3 is passed through the high pass filter 6C. Are synthesized by the synthesizer 12, and the signals of each frequency synthesized by the synthesizer 12 are amplified by the high frequency amplifier 2 </ b> B and output to the high frequency output unit 5. The signal amplified by the high-frequency amplifier 2B is output to the low-pass filter 6D, the band-pass filter 6E, and the high-pass filter 6F that are the same as those output to the high-frequency output unit 5 by the detector 10. Signals that have passed through the low-pass filter 6D, the band-pass filter 6E, and the high-pass filter 6F are separated into signals of each frequency and amplified by amplifiers 2C, 2D, and 2E corresponding to the respective frequencies. Each frequency signal amplified by each amplifier is converted to a digital signal by A / D converters 7A, 7B, and 7C corresponding to each frequency, and each signal is sent to CPU 8. The CPU 8 adjusts the gain of each frequency to the set gain by controlling each D / A converter 9A, 9B, 9C and controlling each electronic attenuator based on the value of the incoming digital signal of each frequency.
FIG. 3 (b) is realized by replacing each electronic attenuator of FIG. 3 (a) with a variable gain amplifier, and can perform the same processing as FIG. 3 (a).
By using the configuration and processing flow of the radio unit of the radio as described above, the gain for each frequency can be kept constant.

  The present invention relates to a radio unit of a radio device, and in particular, it is possible to accurately set a gain for each frequency by performing gain adjustment at several different frequencies.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simple configuration diagram of a radio unit using an electronic attenuator in a first embodiment of the present invention; Simple configuration diagram of a radio unit using a variable gain amplifier in the first embodiment of the present invention Simple configuration diagram of a radio unit using an electronic attenuator in the second embodiment of the present invention Simple configuration diagram of a radio unit using an electronic attenuator in the second embodiment of the present invention Simple configuration diagram of a radio unit using a variable gain amplifier in the second embodiment of the present invention Simple configuration diagram of a radio unit using a variable gain amplifier in the second embodiment of the present invention Simple configuration diagram of a radio unit using an electronic attenuator in a third embodiment of the present invention Simple configuration diagram of a radio unit using a variable gain amplifier according to a third embodiment of the present invention Simple configuration diagram of radio unit using electronic attenuator Simple configuration diagram of radio unit using variable gain amplifier

Explanation of symbols

1: high frequency input, 2A: high frequency amplifier, 2B high frequency amplifier, 3A: electronic attenuator, 3B: electronic attenuator, 3C: electronic attenuator, 4: control voltage unit, 5A: filter, 5B: filter, 5C: filter, 6: high frequency output

Claims (1)

Separating means for separating a plurality of signals having different frequencies, a plurality of gain variable means for changing the gain of each frequency signal after being separated for each frequency signal by the separating means, and the plurality of gain varying means And at least one voltage control means for controlling the radio.

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