CN202841456U - Microphone - Google Patents
Microphone Download PDFInfo
- Publication number
- CN202841456U CN202841456U CN 201220566028 CN201220566028U CN202841456U CN 202841456 U CN202841456 U CN 202841456U CN 201220566028 CN201220566028 CN 201220566028 CN 201220566028 U CN201220566028 U CN 201220566028U CN 202841456 U CN202841456 U CN 202841456U
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- CN
- China
- Prior art keywords
- human body
- signal
- selection switch
- body sensor
- power supply
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a microphone, comprising a power supply (1), a sound pickup device (2) and a housing, wherein the microphone also comprises a human body induction sensor (5) and a signal control circuit, wherein the signal control circuit is composed of a gate logic chip (6), and an analogue selection switch chip (4) in connection; the output signal of the human body induction sensor is connected to an input pin of the gate logic chip; logic or operation of the output signal of the human body induction sensor is formed by connection of different gates in the gate logic chip; the output of the logic or operation is connected to an input selection pin of the analogue selection switch chip; one path of signal input pin of the analogue selection switch chip is connected to the output of the sound pickup device; another path of signal input pin is connected to the cathode of the power supply; and the output signal of the analogue selection switch chip is connected with a sound-producing device (3). Automatic opening and closing of a microphone signal can be achieved by arrangement of the human body induction sensor, so as to emit noise or stray noise under an unused state.
Description
Technical field
The utility model relates to a kind of stereo set, is specifically related to a kind of microphone.
Background technology
When using microphone, often occur using forgetting the situation of pressing power knob later, because the collision of a variety of causes and friction or extraneous stimulation cause microphone to send harsh noise.
The patent No. is in the Chinese patent of ZL200720056586.9, discloses a kind of induction type microphone, by the touching type induction switch is set at microphone, hands or decontrols microphone by the people and carry out closing control; But this mode is inapplicable for the microphone that is erected on the frame.
Summary of the invention
The invention technical problem to be solved provides a kind of microphone that can automatically open and close.
For solving the problems of the technologies described above, following technical scheme is adopted in the invention:
The microphone of the invention comprises power supply, pick-up and shell, further comprises human body sensor and signal control circuit;
Described pick-up and human body sensor are arranged on the shell, and human body sensor is arranged on around the pick-up;
Described signal control circuit is formed by connecting by gate logic chip and analog selection switch chip;
The output signal of described human body sensor is connected on the input pin of gate logic chip, by the not logic OR computing of fellow disciple's the output signal that is connected to form human body sensor in the gate logic chip, the output of logic OR computing is connected to analog selection switch chip input selection pin; One road signal input pin of analog selection switch chip connects the output of pick-up, and other one road signal input pin connects the negative pole of power supply, and the output signal of analog selection switch chip connects audible device.
Further, described power supply is to human body sensor and signal control circuit power supply.
Further, described human body sensor adopts the human body heat-releasing electric transducer.
Further, described power acquisition three-terminal voltage-stabilizing circuit.
Further, described pick-up adopts electrodynamic type, condenser type, piezoelectric type, electromagnetic type or carbon granules formula.
Because adopt technique scheme, the invention possesses following beneficial effect:
By the setting of human body sensor, can realize the signal of autoshutdown microphone under the obsolete state, automatically open in use the signal of microphone, and then be implemented under the obsolete state and can not make a noise or noise.
Description of drawings
Fig. 1 is the circuit theory diagrams of the invention preferred embodiment;
Among the figure: 1, power supply; 2, pick-up; 3, audible device; 4, analog selection switch chip; 5, human body sensor; 6, gate logic chip.
Embodiment
Such as Fig. 1, the microphone of present embodiment comprises power supply 1, pick-up 2 and shell, further comprises human body sensor 5 and signal control circuit; Wherein, pick-up 2 and human body sensor 5 are arranged on the shell.Human body sensor 5 adopts pyroelectric sensor D203S, four human body sensors evenly be installed in pick-up around, the direction of human body sensor signal receiving plane and the direction of pick-up are consistent; Signal control circuit is formed by connecting by gate logic chip 6 and analog selection switch chip 4, and the gate logic chip adopts CD4072, and the analog selection switch chip adopts CD4052; Power supply 1 adopts the LM7805 chip.Pick-up 2 adopts electrodynamic type, condenser type, piezoelectric type, electromagnetic type or carbon granules formula as required.
The power pins of pyroelectric sensor D203S connects the output pin of power supply LM7805 chip, the signal output of four pyroelectric sensor D203S is 2,3,4,5 pins of connection door logic chip CD4072 respectively, 11 pins of the 1 pin connecting analog selector switch chip CD4052 of gate logic chip CD4072,13 pins of analog selection switch chip CD4052 connect the negative pole of power supply, 14 pins connect the output signal of pick-up, and 3 pins connect audible device.
During circuit working, when nobody uses microphone, all pyroelectric sensor D203S inductions are less than signal, there is not output signal, at this moment all input signals of gate logic chip CD4072 all do not have signal, gate logic chip CD4072 output low signal then, then the reflection of output signal 3 pins of analog selection switch chip CD4052 is negative pole on 13 pins, what audible device was received is no signal; When having the people to use microphone, then have at least a pyroelectric sensor D203S to sense signal, then gate logic chip CD4072 exports high signal, then output signal 3 pins of analog selection switch chip CD4052 reflections is microphone signal on 14 pins, what then audible device 3 was received is microphone signal, realize automaticallying switch, thus the generation of thorn ear noise when avoiding not using.
Claims (5)
1. a microphone comprises power supply (1), pick-up (2) and shell, it is characterized in that: also comprise human body sensor (5) and signal control circuit;
Described pick-up (2) and human body sensor (5) are arranged on the shell, and human body sensor is arranged on around the pick-up;
Described signal control circuit is formed by connecting by gate logic chip (6) and analog selection switch chip (4);
The output signal of described human body sensor (5) is connected on the input pin of gate logic chip, by the not logic OR computing of fellow disciple's the output signal that is connected to form human body sensor in the gate logic chip, the output of logic OR computing is connected to analog selection switch chip input selection pin; One road signal input pin of analog selection switch chip connects the output of pick-up, and other one road signal input pin connects the negative pole of power supply, and the output signal of analog selection switch chip connects audible device (3).
2. microphone according to claim 1 is characterized in that: described power supply (1) is to human body sensor (5) and signal control circuit power supply.
3. microphone according to claim 1 is characterized in that: described human body sensor (5) employing human body heat-releasing electric transducer.
4. microphone according to claim 1 and 2 is characterized in that: described power supply (1) employing three-terminal voltage-stabilizing circuit.
5. microphone according to claim 1 is characterized in that: described pick-up (2) employing electrodynamic type, condenser type, piezoelectric type, electromagnetic type or carbon granules formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220566028 CN202841456U (en) | 2012-10-29 | 2012-10-29 | Microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220566028 CN202841456U (en) | 2012-10-29 | 2012-10-29 | Microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202841456U true CN202841456U (en) | 2013-03-27 |
Family
ID=47953044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220566028 Expired - Fee Related CN202841456U (en) | 2012-10-29 | 2012-10-29 | Microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202841456U (en) |
-
2012
- 2012-10-29 CN CN 201220566028 patent/CN202841456U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20141029 |
|
| EXPY | Termination of patent right or utility model |