CN205812307U - A kind of wireless microphone - Google Patents
A kind of wireless microphone Download PDFInfo
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- CN205812307U CN205812307U CN201620694624.2U CN201620694624U CN205812307U CN 205812307 U CN205812307 U CN 205812307U CN 201620694624 U CN201620694624 U CN 201620694624U CN 205812307 U CN205812307 U CN 205812307U
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- audio signal
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Abstract
This utility model relates to audio processing equipment technical field, especially a kind of wireless microphone.It includes the miniature pick up for picking up audio signal, the voice modulation module being amplified for the audio signal exporting miniature pick up, carries out warbled varactor for the audio signal exporting voice modulation module, plays audio signal and filter out-of-band frequency and remain and stablize the SAW resonator of mid frequency effect and select feedback module for exporting the frequency of audio signal.This utility model utilizes varactor directly to carry out frequency modulation, by with SAW resonator coordinate and the structure optimization of whole circuit can make mike have the effects such as CFS center frequency stabilization, frequency modulation(PFM) convenience, simple in construction.
Description
Technical field
This utility model relates to audio processing equipment technical field, especially a kind of wireless microphone.
Background technology
Known, wireless microphone (also known as wireless microphone) is a kind of equipment by radio wave transmissions acoustical signal, quilt
It is widely used in many places such as such as stage, dais etc..At present, according to the height of transmitting-receiving frequency between wireless microphone and receiver
Low, different frequency ranges can be divided into, the most conventional is the several frequency range of FM, VHF, UHF；Wherein, the wireless Mike of uhf band
Wind is high because of its stability, has become as the main product on market.And the frequency modulation proper communication, relatively for wireless microphone that communicates
High signal fidelity and preferably frequency response etc. have vital impact.The communication of existing wireless microphone is adjusted
Mostly there is the problems such as structure is complicated, cost is high, center frequency stability difference in frequency circuit.
Utility model content
The deficiency existed for above-mentioned prior art, the purpose of this utility model is to provide a kind of wireless microphone.
To achieve these goals, this utility model adopts the following technical scheme that
A kind of wireless microphone, it includes the miniature pick up for picking up audio signal, for defeated to miniature pick up
Voice modulation module that the audio signal gone out is amplified, carry out frequency tune for the audio signal that voice modulation module is exported
The varactor of system, audio signal is played filter out-of-band frequency remain and stablize the SAW resonator of mid frequency effect with
And select feedback module for exporting the frequency of audio signal；
Described voice modulation module includes the first audion, between colelctor electrode and the base stage of described first audion sequentially
Being in series with the 3rd resistance, the first resistance and the first electric capacity, the colelctor electrode of described first audion is simultaneously the most straight by the second resistance
Connect the base stage with the first audion to be connected；
The colelctor electrode of described first audion is also by the second electric capacity, the 6th resistance and first inductance connection of sequential series
Input in SAW resonator；One end of described miniature pick up is connected between the first resistance and the first electric capacity, the other end leads to
Cross the 4th resistance connect the emitter stage of the first audion and be connected between the second electric capacity and the 6th resistance by the 5th resistance；Institute
The negative electrode stating varactor is connected between the 6th resistance and the first inductance, anode is connected with miniature pick up, and described first
It is also associated with the 7th resistance between inductance and the 3rd resistance；The outfan of described SAW resonator selects feedback module with frequency
Input is connected.
Preferably, described frequency selects feedback module to include the second audion, and the base stage of described second audion is humorous with SAW
The outfan of device of shaking be connected and pass through the 8th resistance simultaneously with the 3rd resistance and the 7th resistance is connected, emitter stage is arranged in parallel
The 9th resistance and the 4th electric capacity connect the anode of varactor, be serially connected with the 3rd electric capacity between emitter stage and colelctor electrode, institute
State the colelctor electrode of the second audion also by the second inductance connection between the 8th resistance and the 7th resistance and by connect the
Six electric capacity are as signal output part.
Preferably, described first audion is 9014 type audions, and described second audion is 28C3356 type audion,
Described varactor is 1SV146 type diode.
Owing to have employed such scheme, this utility model utilizes varactor directly to carry out frequency modulation, by with SAW resonance
The cooperation of device and the structure optimization of whole circuit can make mike have CFS center frequency stabilization, frequency modulation(PFM) convenience, structure letter
Single, there is the strongest practical value and market popularization value.
Accompanying drawing explanation
Fig. 1 is the circuit structure schematic diagram of this utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but this utility model can be by right
Require that the multitude of different ways limiting and covering is implemented.
As it is shown in figure 1, a kind of wireless microphone that the present embodiment provides, it includes picking up for picking up the miniature of audio signal
Sound device MK, for miniature pick up MK output audio signal be amplified voice modulation module, for voice modulation
Module output audio signal carry out warbled varactor D1, audio signal is played filter out-of-band frequency remain also
Stablize the SAW resonator S of mid frequency effect, for exporting the frequency selection feedback module of audio signal and for miniature
Pick up MK, voice modulation module, varactor D1, SAW resonator S and frequency select feedback module to carry out electricity supply
Battery BT；Wherein, voice modulation module includes the first audion T1, between colelctor electrode and the base stage of the first audion T sequentially
Being in series with the 3rd resistance R3, the first resistance R1 and the first electric capacity C1, the colelctor electrode of the first audion T1 is the most simultaneously by the second electricity
Hinder the R2 base stage directly with the first audion T1 to be connected；Meanwhile, the colelctor electrode of the first audion T1 is also by the of sequential series
Two electric capacity C2, the 6th resistance R6 and the first inductance L1 are connected to the input of SAW resonator S；One end of miniature pick up MK is even
Be connected between the first resistance R1 and the first electric capacity C1, the other end connects the emitter stage of the first audion T1 also by the 4th resistance R4
It is connected between the second electric capacity C2 and the 6th resistance R6 by the 5th resistance R；The negative electrode of varactor D1 is connected to the 6th electricity
Hinder between R6 and the first inductance L1, anode is connected with miniature pick up MK, is also connected with between the first inductance L1 and the 3rd resistance R3
There is the 7th resistance R7；The outfan of SAW resonator S selects the input of feedback module to be connected with frequency.
So, mike can pick up sound by miniature pick up MK, utilizes half voltage bias type of voice modulation module to amplify
Audio signal is amplified by circuit structure, and varactor D1 can be directly modulated after amplifying by audio signal, works as increasing
When low frequency signal amplitude on varactor D1 changes, the change in voltage at varactor D1 two ends can be caused, so that
The electric capacity of varactor D1 changes therewith, and then can change the frequency of oscillation of SAW resonator S in little scope, passes through
The traction to frequency of oscillation of the frequency feedback module, makes the frequency of output signal change along with the amplitude of input low frequency signal, with
This realizes the modulation of mike frequency.
As a preferred version, the frequency of the present embodiment selects feedback module to include the second audion T2, the two or three pole
The base stage of pipe T2 be connected with the outfan of SAW resonator S and pass through the 8th resistance R8 simultaneously with the 3rd resistance R3 and the 7th resistance
R7 is connected, emitter stage is arranged in parallel the 9th resistance R9 and the 4th electric capacity C4 connect the anode of varactor D1, transmitting
Being serially connected with the 3rd electric capacity C3 between pole and colelctor electrode, the colelctor electrode of the second audion T2 is connected to the 8th also by the second inductance L2
As signal output part between resistance R8 and the 7th resistance R7 and by the 6th electric capacity C6 of connection.
For ensureing the warbled effect of whole mike, the first audion T1 of the present embodiment is preferably 9014 types three
Pole is managed, and the second audion T2 is preferably 28C3356 type audion, and varactor D1 is preferably 1SV146 type diode.
The foregoing is only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model,
Every equivalent structure utilizing this utility model description and accompanying drawing content to be made or equivalence flow process conversion, or directly or indirectly transport
It is used in other relevant technical fields, is the most in like manner included in scope of patent protection of the present utility model.
Claims (3)
1. a wireless microphone, it is characterised in that: it includes the miniature pick up for picking up audio signal, for miniature
Pick up output audio signal be amplified voice modulation module, enter for the audio signal that voice modulation module is exported
The varactor of line frequency modulation, audio signal is played filter the SAW that out-of-band frequency remains and stablizes mid frequency effect
Resonator and for export audio signal frequency select feedback module；
Described voice modulation module includes the first audion, sequentially connects between colelctor electrode and the base stage of described first audion
Have the 3rd resistance, the first resistance and the first electric capacity, the colelctor electrode of described first audion the most simultaneously by the second resistance directly with
The base stage of the first audion is connected；
The colelctor electrode of described first audion also by sequential series the second electric capacity, the 6th resistance and the first inductance connection in
The input of SAW resonator；One end of described miniature pick up is connected between the first resistance and the first electric capacity, the other end passes through
4th resistance is connected the emitter stage of the first audion and is connected between the second electric capacity and the 6th resistance by the 5th resistance；Described
The negative electrode of varactor is connected between the 6th resistance and the first inductance, anode is connected with miniature pick up, described first electricity
It is also associated with the 7th resistance between sense and the 3rd resistance；The outfan of described SAW resonator selects the defeated of feedback module with frequency
Enter end to be connected.
2. a kind of wireless microphone as claimed in claim 1, it is characterised in that: described frequency selects feedback module to include second
Audion, the described base stage of the second audion is connected with the outfan of SAW resonator and passes through the while of the 8th resistance electric with the 3rd
Resistance is connected with the 7th resistance, the 9th resistance that emitter stage is arranged in parallel and the anode of the 4th electric capacity connection varactor,
Be serially connected with the 3rd electric capacity between emitter stage and colelctor electrode, the colelctor electrode of described second audion also by the second inductance connection in
As signal output part between eight resistance and the 7th resistance and by the 6th electric capacity of connection.
3. a kind of wireless microphone as claimed in claim 2, it is characterised in that: described first audion is 9014 type three poles
Pipe, described second audion is 28C3356 type audion, and described varactor is 1SV146 type diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620694624.2U CN205812307U (en) | 2016-07-01 | 2016-07-01 | A kind of wireless microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620694624.2U CN205812307U (en) | 2016-07-01 | 2016-07-01 | A kind of wireless microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205812307U true CN205812307U (en) | 2016-12-14 |
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ID=58139337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620694624.2U Active CN205812307U (en) | 2016-07-01 | 2016-07-01 | A kind of wireless microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205812307U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109511024A (en) * | 2018-12-06 | 2019-03-22 | 广州荣锋电子科技有限公司 | Microphone |
-
2016
- 2016-07-01 CN CN201620694624.2U patent/CN205812307U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109511024A (en) * | 2018-12-06 | 2019-03-22 | 广州荣锋电子科技有限公司 | Microphone |
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