CN209488797U - Sound pick-up - Google Patents
Sound pick-up Download PDFInfo
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- CN209488797U CN209488797U CN201822278813.3U CN201822278813U CN209488797U CN 209488797 U CN209488797 U CN 209488797U CN 201822278813 U CN201822278813 U CN 201822278813U CN 209488797 U CN209488797 U CN 209488797U
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Abstract
The utility model discloses a kind of sound pick-ups, including pickup source, advance signal amplifying unit, noise reduction audio processing unit, rear class signal amplification unit, audio output unit and power supply unit, the output end in pickup source is connect with the input terminal of advance signal amplifying unit, and the output end of advance signal amplifying unit is connect with an input terminal of the input terminal of noise reduction audio processing unit and rear class signal amplification unit respectively；Power supply unit includes input power, 3rd resistor, the first triode, the second triode, third transistor, first resistor, second resistance, first diode, the first out-put supply and the second out-put supply, the second pin of input power is connect with the emitter of one end of 3rd resistor and third transistor respectively, and the other end of 3rd resistor is connect with the emitter of the first triode.Implement the utility model sound pick-up, have the advantages that circuit structure is relatively simple, cost is relatively low, maintain easily, the safety and reliability of circuit it is higher.
Description
Technical field
The utility model relates to field of electronic device, in particular to a kind of sound pick-up.
Background technique
Sound pick-up is common a kind of element for acquiring sound in audiofrequency apparatus, since sound pick-up can generate now sound
Acquired in real time, this point is like monitor in real time to sound source, therefore in life, it and usually by
We, which are referred to as, monitors sound pick-up.Sound pick-up can be described as a kind of amplifier, a kind of amplifier acted in audio.It can be incited somebody to action
Sound is acquired and amplifies, and can play the role of certain elimination noise.The in-line power part of traditional sound pick-up
The component used is more, and circuit structure is complicated, and hardware cost is higher, it has not been convenient to safeguard.In addition, due in traditional sound pick-up
Portion's power pack lacks corresponding circuit protection function, such as: lack current-limiting protection function, causes the safety of circuit and reliable
Property is poor.
Utility model content
The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of circuit knot
Structure is relatively simple, cost is relatively low, maintains easily, the higher sound pick-up of the safety and reliability of circuit.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of sound pick-up is constructed, including pickup source,
Advance signal amplifying unit, noise reduction audio processing unit, rear class signal amplification unit, audio output unit and power supply unit, institute
The output end for stating pickup source is connect with the input terminal of the advance signal amplifying unit, the output of the advance signal amplifying unit
End is connect with an input terminal of the input terminal of the noise reduction audio processing unit and rear class signal amplification unit respectively, the drop
The output end of audio treatment unit of making an uproar is connected with another input terminal of the rear class signal amplification unit, and the rear class signal is put
The output end of big unit is connect with the audio output unit, and the output end of the power supply unit and noise reduction audio processing are single
Member connection
The power supply unit includes input power, 3rd resistor, the first triode, the second triode, third transistor,
One resistance, second resistance, first diode, the first out-put supply and the second out-put supply, the second pin of the input power
It is connect respectively with the emitter of one end of the 3rd resistor and third transistor, the other end of the 3rd resistor and described the
The emitter of one triode connects, the first pin of input power collector and second with first triode respectively
The emitter of triode connects, the grounded collector of second triode, the base stage and the third of first triode
The collector of triode connects, the base stage of first triode pass through the first resistor and first out-put supply the
The connection of one pin, the second pin of first out-put supply and the second pin of the second out-put supply are grounded, and described second
The base stage of triode is connect with the cathode of one end of the second resistance and first diode respectively, the second resistance it is another
The anode of end and first diode is connect with the first pin of second out-put supply, and the resistance value of the 3rd resistor is
37kΩ。
In sound pick-up described in the utility model, the power supply unit further includes first capacitor, the first capacitor
One end is connect with the base stage of first triode, and the collector of the other end of the first capacitor and the third transistor connects
It connects, the capacitance of the first capacitor is 380pF.
In sound pick-up described in the utility model, the power supply unit further includes the second diode, the two or two pole
The cathode of pipe is connect with the base stage of second triode, the anode of second diode respectively with the second resistance one
End is connected with the cathode of first diode, the model S-822T of second diode.
In sound pick-up described in the utility model, the power supply unit further includes the 4th resistance, the 4th resistance
One end is connect with the collector of second triode, the other end ground connection of the 4th resistance, the resistance value of the 4th resistance
For 45k Ω.
In sound pick-up described in the utility model, first triode, the second triode and third transistor are
NPN type triode.
The sound pick-up for implementing the utility model has the advantages that due to being equipped with pickup source, advance signal amplification list
Member, noise reduction audio processing unit, rear class signal amplification unit, audio output unit and power supply unit；Power supply unit includes input
Power supply, 3rd resistor, the first triode, the second triode, third transistor, first resistor, second resistance, first diode,
First out-put supply and the second out-put supply, the power supply unit use compared with the in-line power part of traditional sound pick-up
Component is less, due to saving some components, can reduce hardware cost in this way, in addition, 3rd resistor is for being limited
Stream protection, therefore circuit structure is relatively simple, cost is relatively low, maintain easily, the safety and reliability of circuit is higher.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram in the utility model sound pick-up one embodiment；
Fig. 2 is the circuit diagram of power supply unit in the embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In the utility model sound pick-up embodiment, the structural schematic diagram of the sound pick-up is as shown in Figure 1.In Fig. 1, the pickup
Device includes pickup source 1, advance signal amplifying unit 2, noise reduction audio processing unit 3, rear class signal amplification unit 4, audio output
Unit 5 and power supply unit 6, wherein the output end in pickup source 1 is connect with the input terminal of advance signal amplifying unit 2, advance signal
The input with the input terminal of noise reduction audio processing unit 3 and rear class signal amplification unit 4 respectively of the output end of amplifying unit 2
End connection, the output end of noise reduction audio processing unit 3 are connected with another input terminal of rear class signal amplification unit 4, rear class letter
The output end of number amplifying unit 4 is connect with audio output unit 5, and the output end and noise reduction audio processing unit 3 of power supply unit 6 connect
It connects.
In the present embodiment, pickup source 1 is generally realized using microphone, and power supply unit 6 uses 15V DC power supply.When work,
The collected audio signal in pickup source 1 is sent to sound by two-stage signal amplifying unit enhanced processing and after noise reduction audio is handled
Frequency output unit 5 is sent out outward.Specifically, sound pick-up is connected with the mains, and it is connected to the voice input port of video server；
Sound pick-up is installed to scene, the i.e. meeting perfection of live sound is recorded on video server, when needing to play back, takes from video
It is engaged in reading in device.
Fig. 2 is the circuit diagram of power supply unit in the present embodiment, in Fig. 2, the power supply unit 6 include input power Vin,
3rd resistor R3, the first triode Q1, the second triode Q2, third transistor Q3, first resistor R1, second resistance R2, first
Diode D1, the first out-put supply Vo1 and the second out-put supply Vo2, the second pin of input power Vin respectively with 3rd resistor
One end of R3 is connected with the emitter of third transistor Q3, and the emitter of the other end of 3rd resistor R3 and the first triode Q1 connect
It connecing, the first pin of input power Vin is connect with the emitter of the collector of the first triode Q1 and the second triode Q2 respectively,
The base stage of the grounded collector of second triode Q2, the first triode Q1 is connect with the collector of third transistor Q3, and the one or three
The base stage of pole pipe Q1 is connect by first resistor R1 with the first pin of the first out-put supply Vo1, and the of the first out-put supply Vo1
The second pin of two pins and the second out-put supply Vo2 are grounded, and the base stage of the second triode Q2 is respectively with second resistance R2's
One end is connected with the cathode of first diode D1, and the other end of second resistance R2 and the anode of first diode D1 are defeated with second
The first pin connection of power supply Vo2 out.
The power supply unit 6 is compared with the in-line power part of traditional sound pick-up, and the component used is less, circuit structure
It is relatively simple, it maintains easily, due to saving some components, hardware cost can be reduced in this way.In addition, 3rd resistor R3 is
Current-limiting resistance, for carrying out current-limiting protection, therefore the safety and reliability of circuit is higher.It is noted that the present embodiment
In, the resistance value of 3rd resistor R2 is 37k Ω, and certainly, in practical applications, the resistance value of 3rd resistor R2 can be as the case may be
It adjusts accordingly.
The working principle of the power supply unit 6 is as follows: input power Vin is carried out by the first triode Q1 and the second triode Q2
It shunts, pressure stabilizing is being carried out to two power supplys separated by voltage regulator circuit, finally by the output electricity of the first out-put supply Vo1 and second
Source Vo2 is exported away, whole to use two-supply circuit, at low cost compared to the high reliablity of single supply circuit work, when first defeated
When power supply Vo1 is damaged out, the second out-put supply Vo2 power supply can be used, production efficiency is greatly improved, avoids not estimating
Loss.
In the present embodiment, the first triode Q1, the second triode Q2 and third transistor Q3 are NPN type triode.When
So, in practical applications, the first triode Q1, the second triode Q2 and third transistor Q3 can also use PNP type triode,
But at this moment the structure of circuit also will accordingly change.
In the present embodiment, which further includes first capacitor C1, one end of first capacitor C1 and the first triode Q1
Base stage connection, the other end of first capacitor C1 connect with the collector of third transistor Q3.First capacitor C1 is coupled capacitor,
For preventing the interference between the first triode Q1 and third transistor Q3, to further enhance circuit safety and reliability.
It is noted that the capacitance of first capacitor C1 is 380pF in the present embodiment, certainly, in practical applications, first capacitor
The capacitance of C1 can adjust accordingly as the case may be.
In the present embodiment, which further includes the second diode D2, the cathode of the second diode D2 and the two or three pole
The base stage of pipe Q2 connects, and the anode of the second diode D2 connects with the cathode of one end of second resistance R2 and first diode D1 respectively
It connects.Second diode D2 is Current Limiting Diodes, for carrying out current-limiting protection, further to enhance circuit safety and reliable
Property.It is noted that in the present embodiment, the model S-822T of the second diode D2.
In the present embodiment, which further includes the 4th resistance R4, one end of the 4th resistance R4 and the second triode Q2
Collector connection, the 4th resistance R4 the other end ground connection.4th resistance R4 is current-limiting resistance, for carrying out current-limiting protection, with
Further enhance current limitation effect.It is noted that the resistance value of the 4th resistance R4 is 45k Ω, certainly, in reality in the present embodiment
In the application of border, the resistance value of the 4th resistance R4 can adjust accordingly as the case may be.
In short, in the present embodiment, the power supply unit 6 is compared with the in-line power part of traditional sound pick-up, the member that uses
Device is less, and circuit structure is relatively simple, maintains easily, and due to saving some components, can reduce hardware cost in this way.
In addition, being equipped with current-limiting resistance in the power supply unit 6, therefore the safety and reliability of circuit is higher.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (5)
1. a kind of sound pick-up, which is characterized in that including pickup source, advance signal amplifying unit, noise reduction audio processing unit, rear class
Signal amplification unit, audio output unit and power supply unit, the output end in the pickup source and the advance signal amplifying unit
Input terminal connection, the output end of the advance signal amplifying unit respectively with the input terminal of the noise reduction audio processing unit and
One input terminal of rear class signal amplification unit connects, and the output end of the noise reduction audio processing unit is put with the rear class signal
Another input terminal of big unit is connected, and the output end of the rear class signal amplification unit is connect with the audio output unit,
The output end of the power supply unit is connect with the noise reduction audio processing unit；
The power supply unit includes input power, 3rd resistor, the first triode, the second triode, third transistor, the first electricity
Resistance, second resistance, first diode, the first out-put supply and the second out-put supply, the second pin difference of the input power
It is connect with the emitter of one end of the 3rd resistor and third transistor, the other end of the 3rd resistor and the described 1st
The emitter of pole pipe connects, the first pin of the input power respectively with the collector of first triode and the two or three pole
The emitter of pipe connects, the grounded collector of second triode, the base stage of first triode and the three or three pole
The collector of pipe connects, and the base stage of first triode is drawn by the first resistor with the first of first out-put supply
Foot connection, the second pin of first out-put supply and the second pin of the second out-put supply are grounded, the two or three pole
The base stage of pipe is connect with the cathode of one end of the second resistance and first diode respectively, the other end of the second resistance and
The anode of first diode is connect with the first pin of second out-put supply, and the resistance value of the 3rd resistor is 37k Ω.
2. sound pick-up according to claim 1, which is characterized in that the power supply unit further includes first capacitor, and described
One end of one capacitor is connect with the base stage of first triode, the other end of the first capacitor and the third transistor
Collector connection, the capacitance of the first capacitor are 380pF.
3. sound pick-up according to claim 2, which is characterized in that the power supply unit further includes the second diode, described
The cathode of second diode is connect with the base stage of second triode, and the anode of second diode is respectively with described second
One end of resistance is connected with the cathode of first diode, the model S-822T of second diode.
4. sound pick-up according to claim 3, which is characterized in that the power supply unit further includes the 4th resistance, and described
One end of four resistance is connect with the collector of second triode, the other end ground connection of the 4th resistance, the 4th electricity
The resistance value of resistance is 45k Ω.
5. sound pick-up according to any one of claims 1 to 4, which is characterized in that first triode, the two or three pole
Pipe and third transistor are NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822278813.3U CN209488797U (en) | 2018-12-31 | 2018-12-31 | Sound pick-up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822278813.3U CN209488797U (en) | 2018-12-31 | 2018-12-31 | Sound pick-up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209488797U true CN209488797U (en) | 2019-10-11 |
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ID=68129826
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822278813.3U Active CN209488797U (en) | 2018-12-31 | 2018-12-31 | Sound pick-up |
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| Country | Link |
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| CN (1) | CN209488797U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423178A (en) * | 2020-10-22 | 2021-02-26 | 国网浙江省电力有限公司双创中心 | Communication device for live working process of ultra-high voltage transmission line |
-
2018
- 2018-12-31 CN CN201822278813.3U patent/CN209488797U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423178A (en) * | 2020-10-22 | 2021-02-26 | 国网浙江省电力有限公司双创中心 | Communication device for live working process of ultra-high voltage transmission line |
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