CN2075840U - Sound controlled receiver - Google Patents
Sound controlled receiver Download PDFInfo
- Publication number
- CN2075840U CN2075840U CN 90225948 CN90225948U CN2075840U CN 2075840 U CN2075840 U CN 2075840U CN 90225948 CN90225948 CN 90225948 CN 90225948 U CN90225948 U CN 90225948U CN 2075840 U CN2075840 U CN 2075840U
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- CN
- China
- Prior art keywords
- noise
- utility
- signal channel
- model
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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- Noise Elimination (AREA)
Abstract
The utility model can attenuate the ambient noise by more than 60dB without affecting talking, and is widely used in the occasions of much environmental noise and difficulty in talking, such as national defence, public security, large-sized factories, mines, etc. The utility model adopts the principle of 'noise suppressing noise '. The utility model is provided with a main and an auxiliary signal channels, wherein, the master signal channel comprises talking signals and environmental noise signals, the noise signals in the auxiliary signal channel are synchronous with the noise signals in the main signal channel, and the differential amplifiers are simultaneous input in two channels. The noise is attenuated by using the feature of differential amplification to single-end amplification, thus achieving the function of noise suppression.
Description
The utility model is applicable to communication field, and the field of particularly conversing comprises wired or radio telephone etc.
In the receiver that in the past uses, DYN dynamic still post pole body no matter, all there is a common defective in they, and to be exactly them all be converted to the signal of telecommunication with useful sound wave and ambient noise sound wave transfers out for that.The situation that noise also transfers out thereupon when so just causing conversation will influence communication effect when noise is big.
The purpose of this utility model is that a kind of receiver that can suppress ambient noise will be provided, and it can carry out decay more than the 60dB to ambient noise, and conversation is had no effect.
The purpose of this utility model is achieved in that a kind of receiver that suppresses noise signal, it is characterized in that this receiver suppresses circuit by main signal channel, pair signalling channel and noise signal and forms.Main signal channel comprises a microphone and the one-level amplifying circuit that joins with it, it is identical with main signal channel to pay the signalling channel structure, noise signal suppress circuit comprise two respectively with the master, pay the follower that the signalling channel output joins, they form interface circuit, and the output of this interface circuit is connected with the input of differential amplifier respectively.It uses the principle of " noise suppressed noise ", utilizes differential amplifier only to the characteristics of single-ended amplification, makes noise attentuation, reaches the purpose that suppresses noise.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Accompanying drawing is the circuit diagram according to the noise suppression receiver that the utility model proposes.
Below in conjunction with details and the working condition of description of drawings according to concrete device of the present utility model.
This device is made up of master, pair two signalling channels and noise suppression circuit.
Main signal channel is made up of signal receive section M1, R1, and signal is sent into amplifier IC1 in-phase input end 3 pin by C1.Amplifier is made up of 1/2 IC1 amplifier, R2, R3, R7, C3, C5, and signal is sent into differential amplifier input interface part through C7 again behind amplifier.
Pay signalling channel and be made up of signal receive section M2, R4, signal is sent into amplifier IC1 in-phase input end 5 pin by C2.Amplifier is made up of 1/2 IC1 ' amplifier, R5, R6, W1, C4, C6, and signal is sent into differential amplifier input interface part through C8 again behind amplifier.Wherein W1 is the compensation of M1 and M2 sensitivity difference.
Differential amplifier input interface part is that TL064, R8, R9, R11, R10, R12 form by 1/4 IC2,1/4 IC2 ' amplifier, receives signals main, pair two signalling channels respectively, sends into two inputs of differential amplifier more respectively.Differential amplifier is by 1/4 IC2, and " amplifier, C9, R13, W2 form, and export through C10.It utilizes integrated circuit input end to finish, and W2 regulates the differential amplifier common mode inhibition.
Claims (1)
- A kind of receiver that suppresses noise signal is characterized in that this receiver suppresses circuit by main signal channel, pair signalling channel and noise signal and forms.Main signal channel comprises a microphone and the one-level amplifying circuit that joins with it, it is identical with main signal channel to pay the signalling channel structure, noise signal suppress circuit comprise two respectively with the master, pay the follower that the signalling channel output joins, they form interface circuit, and the output of this interface circuit is connected with the input of differential amplifier respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90225948 CN2075840U (en) | 1990-12-19 | 1990-12-19 | Sound controlled receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90225948 CN2075840U (en) | 1990-12-19 | 1990-12-19 | Sound controlled receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2075840U true CN2075840U (en) | 1991-04-24 |
Family
ID=4903291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90225948 Withdrawn CN2075840U (en) | 1990-12-19 | 1990-12-19 | Sound controlled receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2075840U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768104A (en) * | 2015-02-09 | 2015-07-08 | 江苏海湾电气科技有限公司 | Ship anti-environmental-noise and anti-howling microphone circuit |
| CN111537851A (en) * | 2020-05-22 | 2020-08-14 | 刘莹雪 | Cable monitoring system based on Internet of things |
-
1990
- 1990-12-19 CN CN 90225948 patent/CN2075840U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768104A (en) * | 2015-02-09 | 2015-07-08 | 江苏海湾电气科技有限公司 | Ship anti-environmental-noise and anti-howling microphone circuit |
| CN104768104B (en) * | 2015-02-09 | 2017-11-24 | 江苏海湾电气科技有限公司 | Environment resistant noise peculiar to vessel and anti-microphone circuit of uttering long and high-pitched sounds |
| CN111537851A (en) * | 2020-05-22 | 2020-08-14 | 刘莹雪 | Cable monitoring system based on Internet of things |
| CN111537851B (en) * | 2020-05-22 | 2020-12-08 | 国网江苏省电力有限公司苏州供电分公司 | Cable monitoring system based on Internet of things |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |