CN208479629U - A kind of stereo transmission circuit of FM - Google Patents
A kind of stereo transmission circuit of FM Download PDFInfo
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- CN208479629U CN208479629U CN201821167843.0U CN201821167843U CN208479629U CN 208479629 U CN208479629 U CN 208479629U CN 201821167843 U CN201821167843 U CN 201821167843U CN 208479629 U CN208479629 U CN 208479629U
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- frequency modulation
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Abstract
The utility model relates to a kind of stereo transmission circuit of FM, including processor and linear voltage regulator, processor is connected with frequency modulation transceiving chip and audio-frequency amplifier, and frequency modulation transceiving chip is connect with audio-frequency amplifier；Linear voltage regulator is connect with frequency modulation transceiving chip, audio-frequency amplifier and processor respectively；Frequency modulation transceiving chip is connected with antenna and audio input interface, and audio-frequency amplifier is connected with audio output interface；The end ARO of frequency modulation transceiving chip is connected with first capacitor, the end VIN2 of the other end connection audio-frequency amplifier of first capacitor, and the end ALO of frequency modulation transceiving chip is connected with the second capacitor, the end VIN1 of the other end connection audio-frequency amplifier of the second capacitor；It realizes and wireline audio signal is converted into wireless audio signal, and the audio signal received can also be done to fidelity and handled so that output sound quality is more clear, more there is three-dimensional sense, small in size, at low cost, applicability is extensive.
Description
Technical field
The utility model relates to communication technology technical fields, more specifically to a kind of stereo transmission circuit FM of FM
Stereo transmission circuit.
Background technique
FM FM receiver on the market at present, by adjusting the broadcast singal that different UHF band reception Base Transmitters goes out,
And for mountain area, subway station is interior, and the signal fidelity for waiting some areas to receive in intensive building is lower, or can not receive
The broadcast singal that Base Transmitter goes out；Therefore the utility model proposes the design solutions of the stereo transmission circuit of FM, can incite somebody to action
The audio signals such as Discman, MD, MP3 are converted into FM FM signal and launch, and allow family or vehicle-mounted radio to receive, i.e.,
The stereo music music effect completely new by user experience can be enjoyed.
Utility model content
The technical problem to be solved by the present invention is to, in view of the above drawbacks of the prior art, provide it is a kind of small in size,
It is at low cost, the stereo transmission circuit of the extensive FM of applicability.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
Construct a kind of stereo transmission circuit of FM, including processor and linear voltage regulator；Wherein, the processor is connected with
Frequency modulation transceiving chip and audio-frequency amplifier, the frequency modulation transceiving chip are connect with the audio-frequency amplifier；The linear voltage regulator
It is connect respectively with the frequency modulation transceiving chip, audio-frequency amplifier and processor；The frequency modulation transceiving chip be connected with antenna and
Audio input interface, the audio-frequency amplifier are connected with audio output interface；The end ARO of the frequency modulation transceiving chip is connected with
One capacitor, the other end of the first capacitor connect the end VIN2 of the audio-frequency amplifier, the end ALO of the frequency modulation transceiving chip
It is connected with the second capacitor, the other end of second capacitor connects the end VIN1 of the audio-frequency amplifier.
The stereo transmission circuit of FM described in the utility model, wherein multiple ends GND of the frequency modulation transceiving chip are equal
It is connect with the end GND of the linear voltage regulator；The end ARI of the frequency modulation transceiving chip is connected with third capacitor, the third electricity
The other end of appearance is connected with the first inductance, and the other end of first inductance is connect with the end R of the audio input interface；It is described
The end ALI of frequency modulation transceiving chip is connected with the 4th capacitor, and the other end of the 4th capacitor is connected with the second inductance, and described second
The other end of inductance is connect with the end L of the audio input interface.
The stereo transmission circuit of FM described in the utility model, wherein the end RFO of the frequency modulation transceiving chip is connected with
5th capacitor and third inductance, the other end of the third inductance are connect with the end GND of the frequency modulation transceiving chip；Described
The other end of five capacitors is connected with the 6th capacitor and the 4th inductance, and the other end of the 4th inductance is connected to the antenna, institute
The other end for stating the 4th inductance is also connected with the 7th capacitor, and the other end of the six, the 7th capacitor is received and dispatched with the frequency modulation
The end GND of chip connects.
The stereo transmission circuit of FM described in the utility model, wherein the other end of the 5th capacitor is also connected with
One resistance, the other end of the first resistor are connected with the 5th inductance, and the other end and the frequency modulation of the 5th inductance are received and dispatched
The end GND of chip connects；The other end of the first resistor is also connect with the end GND of the audio input interface.
The stereo transmission circuit of FM described in the utility model, wherein the end VOUT2 of the audio-frequency amplifier is connected with
8th capacitor, the other end of the 8th capacitor are connected with the first variable resistance, the other end of first variable resistance and institute
State the end the L connection of audio output interface；The end VOUT1 of the audio-frequency amplifier is connected with the 9th capacitor, the 9th capacitor
The other end is connected with the second adjustable resistance, and the other end of the second adjustable resistance is connect with the end R of the audio output interface.
The stereo transmission circuit of FM described in the utility model, wherein the end RFI of the frequency modulation transceiving chip is connected with
Tenth capacitor, the other end of the tenth capacitor are connected with the 6th inductance, and the other end of the 6th inductance is connected with the second electricity
Resistance, the other end of the second resistance are connect with the end GND of the audio output interface, and the other end of the second resistance is also
It is connected with third variable resistance, the other end of the third variable resistance is connect with the end GND of the frequency modulation transceiving chip.
The stereo transmission circuit of FM described in the utility model, wherein the end INT of the processor, the end SCL, the end SDA,
The end CEN, the end XCLK and the end INT, the end SCL, the end SDA, the end CEN, the end CLK of the frequency modulation transceiving chip are correspondingly connected with；The place
The end SHUTDOWN of reason device is connected to the end SHUTDOWN of the audio-frequency amplifier.
The stereo transmission circuit of FM described in the utility model, wherein the end VOUT of the linear voltage regulator respectively with institute
State the end INT, the end SCL, the end the SDA connection of processor；The end VOUT of the linear voltage regulator respectively with the audio-frequency amplifier
The end UP/DN, the end CLOCK, the connection of the end VCC；The end VOUT of the linear voltage regulator and the end VCC of the frequency modulation transceiving chip connect
It connects.
The utility model has the beneficial effects that: linear voltage regulator is to frequency modulation transceiving chip, audio-frequency amplifier and processing
Device provides stable working power；Frequency modulation transceiving chip will be connect by audio input interface and external audio signal wired connection
The audio signal received is transmitted through antenna after transmitting is handled receives wireless audio signal for external wireless receiving device；
Frequency modulation transceiving chip is more clear sound quality by processing also by the audio signal transmission received to audio-frequency amplifier simultaneously,
More there is three-dimensional sense, believed for it using better audio with carrying out wired connection with external equipment by audio output interface
Number；It realizes and wireline audio signal is converted into wireless audio signal, and the audio signal received can also be done at fidelity
Reason more has three-dimensional sense, small in size, at low cost, applicability is extensive so that output sound quality is more clear.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below in conjunction with attached drawing and reality
Applying example, the utility model is described in further detail, and the accompanying drawings in the following description is only section Example of the invention, for this
For the those of ordinary skill of field, without creative efforts, it is attached to can also be obtained according to these attached drawings other
Figure:
Fig. 1 is the stereo transmission circuit frequency modulation transceiving chip of FM and audio-frequency amplifier of the utility model preferred embodiment
Circuit diagram；
Fig. 2 is the circuit diagram of the stereo transmission circuit processor of FM of the utility model preferred embodiment；
Fig. 3 is the circuit diagram of the stereo transmission circuit linear voltage regulator of FM of the utility model preferred embodiment.
Specific embodiment
It is practical below in conjunction with this in order to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Technical solution in new embodiment carries out clear, complete description, it is clear that described embodiment is the portion of the utility model
Point embodiment, rather than whole embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not paying creation
Property labour under the premise of every other embodiment obtained, belong to the protection scope of the utility model.
The stereo transmission circuit of the FM of the utility model preferred embodiment is as shown in Figure 1, simultaneously referring to Fig.2, Fig. 3 includes place
Device U3 and linear voltage regulator U6318 is managed, processor U3 is connected with frequency modulation transceiving chip U1 and audio-frequency amplifier U2, frequency modulation transmitting-receiving
Chip U1 is connect with audio-frequency amplifier U2；Linear voltage regulator U6318 respectively with frequency modulation transceiving chip U1, audio-frequency amplifier U2 with
And processor U3 connection；Frequency modulation transceiving chip U1 is connected with antenna ANT5004 and audio input interface REC1, audio-frequency amplifier
U2 is connected with audio output interface REC2；The end ARO of frequency modulation transceiving chip U1 is connected with first capacitor C7, and first capacitor C7's is another
One end connects the end VIN2 of audio-frequency amplifier U2, and the end ALO of frequency modulation transceiving chip U1 is connected with the second capacitor C8, the second capacitor C8
The other end connection audio-frequency amplifier U2 the end VIN1；Linear voltage regulator U6318 is to frequency modulation transceiving chip U1, audio-frequency amplifier
U2 and processor U3 provide stable working power；Frequency modulation transceiving chip U1 passes through audio input interface REC1 and external audio
Signal wired connection launches the audio signal received through antenna ANT5004 for external wireless after transmitting is handled
Receiving device receives wireless audio signal；Frequency modulation transceiving chip is also by the audio signal transmission received to audio-frequency amplifier simultaneously
U2 is more clear sound quality by processing, more has three-dimensional sense, with by audio output interface REC2 and external equipment into
Row wired connection uses better audio signal for it；It realizes and wireline audio signal is converted into wireless audio signal, and also
The audio signal received can be done to fidelity to handle so that output sound quality is more clear, more there is three-dimensional sense, it is small in size, at
This is low, and applicability is extensive.
As shown in Figure 1, multiple ends GND of frequency modulation transceiving chip U1 are connect with the end GND of linear voltage regulator U6318；It adjusts
The end ARI of frequency transceiving chip U1 is connected with third capacitor C10, and the other end of third capacitor C10 is connected with the first inductance L4, and first
The other end of inductance L4 is connect with the end R of audio input interface REC1；The end ALI of frequency modulation transceiving chip U1 is connected with the 4th capacitor
C9, the other end of the 4th capacitor C9 are connected with the second inductance L3, the other end of the second inductance L3 and the L of audio input interface REC1
End connection, constitutes filter circuit circuit, to prevent other frequency signals from passing through.
As shown in Figure 1, the end RFO of frequency modulation transceiving chip U1 is connected with the 5th capacitor C3 and third inductance L2, third inductance
The other end of L2 is connect with the end GND of frequency modulation transceiving chip U1；The other end of 5th capacitor C3 is connected with the 6th capacitor C2 and
Four inductance L1, the other end of the 4th inductance L1 are connected to antenna ANT5004, and the other end of the 4th inductance L1 is also connected with the 7th
Capacitor C1, the other end of the six, the 7th capacitor C2, C1 are connect with the end GND of frequency modulation transceiving chip U1, constitute filter circuit
Circuit, to prevent other frequency signals from passing through.
As shown in Figure 1, the other end of the 5th capacitor C3 is also connected with first resistor R1, the other end of first resistor R1 connects
It is connected to the 5th inductance L5, the other end of the 5th inductance L5 is connect with the end GND of frequency modulation transceiving chip U1；First resistor R1's is another
One end is also connect with the end GND of audio input interface REC1, is generated load and is formed potential difference.
As shown in Figure 1, the end VOUT2 of audio-frequency amplifier U2 is connected with the 8th capacitor C12, the other end of the 8th capacitor C12
It is connected with the first variable resistance B101, the other end of the first variable resistance B101 is connect with the end L of audio output interface REC2；Sound
The end VOUT1 of audio amplifier U1 is connected with the 9th capacitor C13, and the other end of the 9th capacitor C13 is connected with the second adjustable resistance
The other end of B1, the second adjustable resistance B1 are connect with the end R of audio output interface REC2, constitute filter circuit circuit, to prevent
Other frequency signals pass through.
As shown in Figure 1, the end RFI of frequency modulation transceiving chip U1 is connected with the tenth capacitor C14, the other end of the tenth capacitor C14
It is connected with the 6th inductance L6, the other end of the 6th inductance L6 is connected with second resistance R4, the other end and audio of second resistance R4
The end GND of output interface RES2 connects, and the other end of second resistance R4 is also connected with third variable resistance B2, third variable resistance
The other end of B2 is connect with the end GND of frequency modulation transceiving chip U1, constitutes filter circuit circuit, to prevent other frequency signals logical
It crosses.
As shown in Fig. 2, the end INT of processor U3, the end SCL, the end SDA, the end CEN, the end XCLK are with frequency modulation transceiving chip U1's
The end INT, the end SCL, the end SDA, the end CEN, the end CLK are correspondingly connected with；The end SHUTDOWN of processor U3 is connected to audio-frequency amplifier U2
The end SHUTDOWN, improve working efficiency, to adapt to different use demands.
As shown in figure 3, the end VOUT of linear voltage regulator U6318 connects with the end INT of processor U3, the end SCL, the end SDA respectively
It connects；The end VOUT of linear voltage regulator U6318 is connect with the end UP/DN of audio-frequency amplifier U2, the end CLOCK, the end VCC respectively；Linearly
The end VOUT of voltage-stablizer U6318 is connect with the end VCC of frequency modulation transceiving chip U1, using linear voltage regulator U6318 for entire electricity
Road operates normally, and further increases working efficiency.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Claims (8)
1. a kind of stereo transmission circuit of FM, including processor and linear voltage regulator；It is characterized in that, the processor is connected with
Frequency modulation transceiving chip and audio-frequency amplifier, the frequency modulation transceiving chip are connect with the audio-frequency amplifier；The linear voltage regulator
It is connect respectively with the frequency modulation transceiving chip, audio-frequency amplifier and processor；The frequency modulation transceiving chip be connected with antenna and
Audio input interface, the audio-frequency amplifier are connected with audio output interface；The end ARO of the frequency modulation transceiving chip is connected with
One capacitor, the other end of the first capacitor connect the end VIN2 of the audio-frequency amplifier, the end ALO of the frequency modulation transceiving chip
It is connected with the second capacitor, the other end of second capacitor connects the end VIN1 of the audio-frequency amplifier.
2. the stereo transmission circuit of FM according to claim 1, which is characterized in that the frequency modulation transceiving chip it is multiple
The end GND is connect with the end GND of the linear voltage regulator；The end ARI of the frequency modulation transceiving chip is connected with third capacitor, described
The other end of third capacitor is connected with the first inductance, and the other end of first inductance and the end R of the audio input interface connect
It connects；The end ALI of the frequency modulation transceiving chip is connected with the 4th capacitor, and the other end of the 4th capacitor is connected with the second inductance,
The other end of second inductance is connect with the end L of the audio input interface.
3. the stereo transmission circuit of FM according to claim 1, which is characterized in that the end RFO of the frequency modulation transceiving chip
It is connected with the 5th capacitor and third inductance, the other end of the third inductance is connect with the end GND of the frequency modulation transceiving chip；Institute
The other end for stating the 5th capacitor is connected with the 6th capacitor and the 4th inductance, and the other end of the 4th inductance is connected to the day
Line, the other end of the 4th inductance are also connected with the 7th capacitor, the other end of the six, the 7th capacitor with the frequency modulation
The end GND of transceiving chip connects.
4. the stereo transmission circuit of FM according to claim 3, which is characterized in that the other end of the 5th capacitor also connects
It is connected to first resistor, the other end of the first resistor is connected with the 5th inductance, the other end and the tune of the 5th inductance
The end GND of frequency transceiving chip connects；The other end of the first resistor is also connect with the end GND of the audio input interface.
5. the stereo transmission circuit of FM according to claim 1, which is characterized in that the end VOUT2 of the audio-frequency amplifier
Be connected with the 8th capacitor, the other end of the 8th capacitor is connected with the first variable resistance, first variable resistance it is another
End is connect with the end L of the audio output interface；The end VOUT1 of the audio-frequency amplifier is connected with the 9th capacitor, and the described 9th
The other end of capacitor is connected with the second adjustable resistance, the R of the other end of the second adjustable resistance and the audio output interface
End connection.
6. the stereo transmission circuit of FM according to claim 1, which is characterized in that the end RFI of the frequency modulation transceiving chip
It is connected with the tenth capacitor, the other end of the tenth capacitor is connected with the 6th inductance, and the other end of the 6th inductance is connected with
Second resistance, the other end of the second resistance are connect with the end GND of the audio output interface, the second resistance it is another
End is also connected with third variable resistance, and the other end of the third variable resistance is connect with the end GND of the frequency modulation transceiving chip.
7. the stereo transmission circuit of FM according to claim 1, which is characterized in that the end INT of the processor, the end SCL,
The end SDA, the end CEN, the end XCLK and the end INT, the end SCL, the end SDA, the end CEN, the end CLK of the frequency modulation transceiving chip are correspondingly connected with；
The end SHUTDOWN of the processor is connected to the end SHUTDOWN of the audio-frequency amplifier.
8. the stereo transmission circuit of FM according to claim 1, which is characterized in that the end VOUT of the linear voltage regulator point
It is not connect with the end INT of the processor, the end SCL, the end SDA；It is put respectively with the audio at the end VOUT of the linear voltage regulator
The end UP/DN of big device, the end CLOCK, the connection of the end VCC；The VCC at the end VOUT of the linear voltage regulator and the frequency modulation transceiving chip
End connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821167843.0U CN208479629U (en) | 2018-07-23 | 2018-07-23 | A kind of stereo transmission circuit of FM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821167843.0U CN208479629U (en) | 2018-07-23 | 2018-07-23 | A kind of stereo transmission circuit of FM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208479629U true CN208479629U (en) | 2019-02-05 |
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ID=65208710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821167843.0U Active CN208479629U (en) | 2018-07-23 | 2018-07-23 | A kind of stereo transmission circuit of FM |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208479629U (en) |
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2018
- 2018-07-23 CN CN201821167843.0U patent/CN208479629U/en active Active
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