CN202160277U - Condenser type microphone device - Google Patents
Condenser type microphone device Download PDFInfo
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- CN202160277U CN202160277U CN2011202304380U CN201120230438U CN202160277U CN 202160277 U CN202160277 U CN 202160277U CN 2011202304380 U CN2011202304380 U CN 2011202304380U CN 201120230438 U CN201120230438 U CN 201120230438U CN 202160277 U CN202160277 U CN 202160277U
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- microphone device
- electret condencer
- microphone unit
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Abstract
The utility model discloses a condenser type microphone device which comprises a condenser type microphone unit. The condenser type microphone unit comprises an acoustoelectric conversion element for realizing the conversion from acoustic signals to electrical signals, and a signal processing element which comprises a signal input end, a signal output end and a public grounding end and is used for processing the electrical signals formed by the acoustoelectric conversion element. The condenser type microphone device further comprises a parallel resistor which is connected with the condenser type microphone unit in parallel. The signal output end of the condenser type microphone unit is connected with the parallel resistor in parallel, thereby being capable of reducing the overall resistance of the condenser type microphone device, further improving output current of the condenser type microphone device and meeting the requirements of a terminal product on high output current of the condenser type microphone device.
Description
Technical field
The utility model relates to the Electret Condencer Microphone field, is specifically related to a kind of capacitive microphone device that can increase output current.
Background technology
In the prior art, capacitive microphone device comprises and is used to realize that acoustical signal is to the acoustic-electric conversion element of electrical signal conversion and the Signal Processing Element that the signal that acoustic-electric conversion element forms is handled; Signal Processing Element comprises signal input part, signal output part and common ground end, and acoustic-electric conversion element is connected in the signal input part of Signal Processing Element.
In some special application; In the A/D change-over circuit; End product requires microphone that bigger output current is arranged; Be to adopt the Signal Processing Element with High Output Current to realize in the prior art, still, Signal Processing Element can't reach the requirement to the capacitive microphone device High Output Current usually.Therefore, be necessary the capacitive microphone device of said structure is improved, to avoid above-mentioned defective.
The utility model content
The utility model technical problem to be solved provides a kind of capacitive microphone device, can improve the output current of capacitive microphone device, satisfies the requirement of end product to the capacitive microphone device High Output Current.
To achieve these goals, the utility model provides a kind of capacitive microphone device, comprises the Electret Condencer Microphone unit, and said Electret Condencer Microphone unit comprises: acoustic-electric conversion element is used to realize that acoustical signal arrives the conversion of the signal of telecommunication; Signal Processing Element comprises signal input part, signal output part and common ground end, is used for the signal of telecommunication that said acoustic-electric conversion element forms is handled; Wherein, said capacitive microphone device also comprises and the parallelly connected parallel resistance in said Electret Condencer Microphone unit.
In addition, preferred scheme is that capacitive microphone device also comprises functional circuit, is used to realize special circuit function.
In addition, preferred scheme is that said functional circuit is parallel between said Electret Condencer Microphone unit and the said resistance.
In addition, preferred scheme is that said functional circuit is parallel to the side of said resistance away from said Electret Condencer Microphone unit.
In addition, preferred scheme is that said functional circuit is a filter circuit.
In addition, preferred scheme is that said filter circuit is an electric capacity parallel circuits, comprises at least one electric capacity.
In addition, preferred scheme is that said filter circuit comprises the series resistance that is series at said Signal Processing Element signal output part, and is connected in said series resistance away from an end of said Electret Condencer Microphone unit and the electric capacity between the common ground end.
In addition; Preferred scheme is; Said filter circuit comprises the series resistance that is series at said Signal Processing Element signal output part; Be connected in said series resistance near first electric capacity between said Electret Condencer Microphone unit one end and the common ground end, and be connected in said resistance away from second electric capacity between said Electret Condencer Microphone unit one end and the common ground end.
In addition, preferred scheme is that said Signal Processing Element is a field-effect transistor.
After adopting technique scheme; Compare with traditional structure; The utility model is parallel with parallel resistance at the signal output part of Electret Condencer Microphone unit; Can reduce the overall resistance of capacitive microphone device, thereby improve the output current of capacitive microphone device, satisfy the requirement of end product the capacitive microphone device High Output Current.
Description of drawings
Through below in conjunction with accompanying drawing embodiment being described, above-mentioned characteristic of the utility model and technological merit will become apparent and understand easily.
Fig. 1 is the circuit theory diagrams of the utility model capacitive microphone device embodiment one.
Fig. 2 is the electrical block diagram of the utility model capacitive microphone device embodiment one.
Fig. 3 is the circuit theory diagrams of the utility model capacitive microphone device embodiment two.
Fig. 4 (a) is the particular circuit configurations sketch map of circuit theory diagrams shown in Figure 3 to Fig. 4 (c).
Fig. 5 is the circuit theory diagrams of the utility model capacitive microphone device embodiment three.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further detailed description.
Embodiment one:
Fig. 1 is the circuit theory diagrams of the utility model capacitive microphone device embodiment one; As shown in Figure 1, capacitive microphone device comprises Electret Condencer Microphone unit 1 and is connected in the signal output part of Electret Condencer Microphone unit 1 and the parallel resistance 2 between the common ground end.
Fig. 2 is the electrical block diagram of the utility model capacitive microphone device embodiment one, and is as shown in Figure 2, and Electret Condencer Microphone unit 1 comprises acoustic-electric conversion element 11 and Signal Processing Element 12; Acoustic-electric conversion element 11 comprises a fixed electrode and a traveling electrode, tentatively accomplishes the conversion of acoustical signal to the signal of telecommunication; Signal Processing Element 12 is used for the signal of telecommunication that acoustic-electric conversion element 11 forms is amplified, and carries out impedance conversion.In this implementation process, Signal Processing Element 12 is a field-effect transistor, comprises the grid G as signal input part; Drain D as signal output part; And as the source S of common ground end, wherein, acoustic-electric conversion element 11 is connected with the grid G of field-effect transistor 12.
Also be connected with parallel resistance 2 between the drain D of field-effect transistor 12 and the source S.Parallel resistance 2 is connected in parallel with Electret Condencer Microphone unit 1; Thereby reduced the resistance value of whole capacitor formula microphone apparatus; Under the certain situation of the voltage that applies, the output current of capacitive microphone device increases, thereby realizes the requirement of end product to its High Output Current.In this implementation process; Can adjust the resistance value of whole capacitor formula microphone apparatus through the resistance value of adjustment parallel resistance 2; And then the size of output current that can control capacitance formula microphone apparatus, thereby can satisfy the requirement of end product to capacitive microphone device.
Embodiment two:
Fig. 3 is the circuit theory diagrams of the utility model capacitive microphone device embodiment two; As shown in Figure 3; Capacitive microphone device comprises Electret Condencer Microphone unit 1 and the parallel resistance 2 that is connected in parallel with Electret Condencer Microphone unit 1, and Electret Condencer Microphone unit 1 is identical with embodiment one, comprises acoustic-electric conversion element 11 and Signal Processing Element 12; The main distinction of present embodiment and embodiment one is; Capacitive microphone device also comprises filter circuit 3, and filter circuit 3 can filtering interference signals, strengthens the antijamming capability of capacitive microphone device.In this implementation process, filter circuit 3 is parallel between Electret Condencer Microphone unit 1 and the parallel resistance 2.Signal Processing Element 12 is a field-effect transistor, and filter circuit 3 is connected between the drain D and source S of field-effect transistor 3, and parallel resistance 2 is connected between the signal output part and common ground end of filter circuit 3.
Fig. 4 (a) is the particular circuit configurations sketch map of circuit theory diagrams shown in Figure 3 to Fig. 4 (c), and the annexation of Electret Condencer Microphone unit 1 and parallel resistance 2 is the same, is primarily aimed at filter circuit in the following description.Shown in Fig. 4 (a); Filter circuit 3a is connected in the drain D of field-effect transistor 12 and the electric capacity parallel circuits between the source S; Comprise at least one electric capacity, in this implementation process, filter circuit 3a is the electric capacity parallel circuits of being made up of capacitor C 11 and capacitor C 12.In this implementation process, the quantity of electric capacity is not limit.
In the present embodiment; Capacitive microphone device comprises Electret Condencer Microphone unit 1, filter circuit 3 and the parallel resistance 2 that is connected in parallel; Parallel resistance 2 can reduce the resistance value of whole capacitor formula microphone apparatus, thereby the electric current of whole capacitor formula microphone apparatus is increased.Identical with embodiment one, this implementation process can be passed through the resistance value of the big or small control capacitance formula microphone apparatus of control parallel resistance 2 resistance values, thereby can adjust current value according to the needs of end product.
Embodiment three:
Fig. 5 is the circuit theory diagrams of the utility model capacitive microphone device embodiment three; As shown in Figure 5; Capacitive microphone device comprises Electret Condencer Microphone unit 1, parallel resistance 2 and filter circuit 3; Electret Condencer Microphone unit 1 comprises acoustic-electric conversion element 11 and Signal Processing Element 12; The particular circuit configurations of filter circuit 3 is consistent with embodiment two, and the main distinction of present embodiment and above embodiment is that filter circuit 3 is parallel to the side of parallel resistance 2 away from Electret Condencer Microphone unit 1.
Same as the previously described embodiments, parallelly connected parallel resistance 2 can reduce the resistance value of whole capacitor formula microphone apparatus equally in the present embodiment, thereby output current is increased.And can reach the requirement of end product through the size of adjustment parallel resistance 2 resistance values to capacitive microphone device.
Signal Processing Element also can be MOS field-effect transistor or IC chip in this implementation process, and said filter circuit also can be other structures, and these improve the enforcement that does not all influence the utility model.In addition, except that filter circuit, also can adopt other functional circuits, like antistatic interfered circuit etc., this no longer tired stating.
Under the above-mentioned instruction of the utility model; Those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description; And these improvement and distortion all drop in the protection range of the utility model, and those skilled in the art should be understood that; Above-mentioned specific descriptions are just better explained the purpose of the utility model, and the protection range of the utility model is limited claim and equivalent thereof.
Claims (9)
1. a capacitive microphone device comprises the Electret Condencer Microphone unit, and said Electret Condencer Microphone unit comprises:
Acoustic-electric conversion element is used to realize that acoustical signal arrives the conversion of the signal of telecommunication;
Signal Processing Element comprises signal input part, signal output part and common ground end, is used for the signal of telecommunication that said acoustic-electric conversion element forms is handled;
It is characterized in that said capacitive microphone device also comprises and the parallelly connected parallel resistance in said Electret Condencer Microphone unit.
2. capacitive microphone device according to claim 1 is characterized in that capacitive microphone device also comprises functional circuit, is used to realize special circuit function.
3. capacitive microphone device according to claim 2 is characterized in that, said functional circuit is parallel between said Electret Condencer Microphone unit and the said resistance.
4. capacitive microphone device according to claim 2 is characterized in that, said functional circuit is parallel to the side of said resistance away from said Electret Condencer Microphone unit.
5. according to the described capacitive microphone device of the arbitrary claim of claim 2 to 4, it is characterized in that said functional circuit is a filter circuit.
6. capacitive microphone device according to claim 5 is characterized in that, said filter circuit is an electric capacity parallel circuits, comprises at least one electric capacity.
7. capacitive microphone device according to claim 5; It is characterized in that; Said filter circuit comprises the series resistance that is series at said Signal Processing Element signal output part, and is connected in said series resistance away from an end of said Electret Condencer Microphone unit and the electric capacity between the common ground end.
8. capacitive microphone device according to claim 5; It is characterized in that; Said filter circuit comprises the series resistance that is series at said Signal Processing Element signal output part; Be connected in said series resistance near first electric capacity between said Electret Condencer Microphone unit one end and the common ground end, and be connected in said resistance away from second electric capacity between said Electret Condencer Microphone unit one end and the common ground end.
9. according to the described capacitive microphone device of the arbitrary claim of claim 1 to 4,
It is characterized in that said Signal Processing Element is a field-effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202304380U CN202160277U (en) | 2011-07-01 | 2011-07-01 | Condenser type microphone device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202304380U CN202160277U (en) | 2011-07-01 | 2011-07-01 | Condenser type microphone device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202160277U true CN202160277U (en) | 2012-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202304380U Expired - Lifetime CN202160277U (en) | 2011-07-01 | 2011-07-01 | Condenser type microphone device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202160277U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579210A (en) * | 2015-01-16 | 2015-04-29 | 深圳联华集成电路有限公司 | Wire headphone volume control circuit for intelligent mobile phone |
| CN108847002A (en) * | 2018-06-22 | 2018-11-20 | 广东大鹏液化天然气有限公司 | A kind of valve pit internal heat monitoring system for reinforcing wireless communication signal |
-
2011
- 2011-07-01 CN CN2011202304380U patent/CN202160277U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579210A (en) * | 2015-01-16 | 2015-04-29 | 深圳联华集成电路有限公司 | Wire headphone volume control circuit for intelligent mobile phone |
| CN108847002A (en) * | 2018-06-22 | 2018-11-20 | 广东大鹏液化天然气有限公司 | A kind of valve pit internal heat monitoring system for reinforcing wireless communication signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20200612 Address after: 266104 room 103, 396 Songling Road, Laoshan District, Qingdao, Shandong Province Patentee after: Goer Microelectronics Co.,Ltd. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: GOERTEK Inc. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120307 |
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| CX01 | Expiry of patent term |