CN204217113U - The inner pickup circuit of a kind of intercom - Google Patents
The inner pickup circuit of a kind of intercom Download PDFInfo
- Publication number
- CN204217113U CN204217113U CN201420367965.XU CN201420367965U CN204217113U CN 204217113 U CN204217113 U CN 204217113U CN 201420367965 U CN201420367965 U CN 201420367965U CN 204217113 U CN204217113 U CN 204217113U
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- capacitor
- resistor
- diode
- switch
- transistor
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Abstract
The utility model discloses the inner pickup circuit of a kind of intercom, comprise the first resistor to the 6th resistor, the first capacitor to the 9th capacitor, the first diode, the second diode, the first switch, second switch, variable inductor, transistor, bulb, battery, monitoring headpone interface, microphone and transmitting antenna.Compared with prior art, the utility model can adjust the frequency of pickup, and other circuit of intercom also can be adjusted frequency, therefore, it is possible to play the effect of double frequency modulation, effectively prevents from getting two or more radio stations at once and reducing interference, and circuit structure is simple, has the value applied.
Description
Technical field
The utility model relates to a kind of inside communication equipment circuit, particularly relates to the inner pickup circuit of a kind of intercom.
Background technology
Intercom is a kind of bidirectional mobile communication instrument, when without any need for network support, just can converse, not have telephone expenses to produce, and is applicable to relatively fix and the occasion of frequent call.But the interference of the pickup circuit of intercom of the prior art is comparatively strong, is also easily got two or more radio stations at once, and therefore, gives in using and brings inconvenience, there is certain room for improvement.
Utility model content
The purpose of this utility model is just to provide a kind of intercom inner pickup circuit to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises the first resistor to the 6th resistor, first capacitor is to the 9th capacitor, first diode, second diode, first switch, second switch, variable inductor, transistor, bulb, battery, monitoring headpone interface, microphone and transmitting antenna, the positive pole of described battery is connected with the first end of described second switch, the second end of described second switch respectively with the positive pole of described bulb, the first end of described 9th capacitor, the first end of described 8th capacitor, the first end of described variable inductor, the first end of described 3rd capacitor, the first end of described 3rd resistor is connected with the first end of described first switch, and the negative pole of described bulb is connected with the first end of described 6th resistor, the second end of described variable inductor respectively with the first end of described 4th capacitor, the first end of described 5th capacitor, second end of described 3rd capacitor is connected with the collector electrode of described transistor, and the second end of described 4th capacitor is connected with described transmitting antenna, the second end of described 5th capacitor respectively with the first end of described 7th capacitor, the emitter of described transistor is connected with the first end of described 5th resistor, the second end of described 3rd resistor respectively with the base stage of described transistor, the first end of described 6th capacitor is connected with the first end of described second capacitor, second end of described first switch is connected with the first end of described first resistor, second end of described first resistor is connected with the first end of described microphone and the first end of described first capacitor respectively, second end of described first capacitor is connected with the first end of described second resistor, the second end of described second resistor with respectively with the second end of described second capacitor, the negative pole of described second diode, the positive pole of described first diode is connected with the first end of described 4th resistor, and the second end of described 4th resistor is connected with the first end of described monitoring headpone interface, the second end of described microphone respectively with the second end of described monitoring headpone interface, the negative pole of described first diode, the positive pole of described second diode, second end of described 6th capacitor, second end of described 5th resistor, second end of described 7th capacitor, second end of described 8th capacitor, second end of described 9th capacitor, second end of described 6th resistor is connected with the negative pole of described battery.
The beneficial effects of the utility model are:
The utility model is the inner pickup circuit of a kind of intercom, compared with prior art, the utility model can adjust the frequency of pickup, other circuit of intercom also can be adjusted frequency, therefore, it is possible to play the effect of double frequency modulation, effectively prevent from getting two or more radio stations at once and reducing interference, circuit structure is simple, has the value applied.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the utility model comprises the first resistor R1 to the 6th resistor R6, first capacitor C1 is to the 9th capacitor C9, first diode VD1, second diode VD2, first K switch 1, second switch K2, variable inductor L, transistor VT, bulb LED, battery E, monitoring headpone interface CK, the positive pole of microphone MIC and transmitting antenna ANT, battery E is connected with the first end of second switch K2, second end of second switch K2 respectively with the positive pole of bulb LED, the first end of the 9th capacitor C9, the first end of the 8th capacitor C8, the first end of variable inductor L, the first end of the 3rd capacitor C3, the first end of the 3rd resistor R3 is connected with the first end of the first K switch 1, and the negative pole of bulb LED is connected with the first end of the 6th resistor R6, second end of variable inductor L respectively with the first end of the 4th capacitor C4, the first end of the 5th capacitor C5, second end of the 3rd capacitor C3 is connected with the collector electrode of transistor VT, and second end of the 4th capacitor C4 is connected with transmitting antenna ANT, second end of the 5th capacitor C5 respectively with the first end of the 7th capacitor C7, the emitter of transistor VT is connected with the first end of the 5th resistor R5, second end of the 3rd resistor R3 respectively with the base stage of transistor VT, the first end of the 6th capacitor C6 is connected with the first end of the second capacitor C2, second end of the first K switch 1 is connected with the first end of the first resistor R1, second end of the first resistor R1 is connected with the first end of microphone MIC and the first end of the first capacitor C1 respectively, second end of the first capacitor C1 is connected with the first end of the second resistor R2, second end of the second resistor R2 with respectively with second end of the second capacitor C2, the negative pole of the second diode VD2, the positive pole of the first diode VD1 is connected with the first end of the 4th resistor R4, and second end of the 4th resistor R4 is connected with the first end of monitoring headpone interface CK, second end of microphone MIC respectively with second end of monitoring headpone interface CK, the negative pole of the first diode VD1, the positive pole of the second diode VD2, second end of the 6th capacitor C6, second end of the 5th resistor R5, second end of the 7th capacitor C7, second end of the 8th capacitor C8, second end of the 9th capacitor C9, second end of the 6th resistor R6 is connected with the negative pole of battery E.
Operation principle of the present utility model is as follows:
As shown in Figure 1: transistor VT, 3rd capacitor C3, 5th capacitor C5 and the 6th capacitor C6 forms the high-frequency generator of a capacitance three-point type, the load regulation four capacitor C4 of transistor VT collector electrode and variable inductance L forms a resonator, resonance frequency is exactly tranmitting frequency of the present utility model, parameter tranmitting frequency according to the utility model employing element can between 88 ~ 108MHZ, the receive frequency of most of intercom can be adapted to, tranmitting frequency can be changed by the numerical value changing variable inductance L, avoid FM radio station, prevent signal disturbing, transmit to be coupled on antenna ANT by the 7th capacitor C7 and launch.
Component parameters of the present utility model is selected as follows:
First resistor R1 is 10K Ω, second resistor R2 is 2.7K Ω, 3rd resistor R3 is 27K Ω, 4th resistor R4 is 68K Ω, 5th resistor R5 is 100 Ω, 6th resistor R6 is 680 Ω, first capacitor C1 is 4.7uf, second capacitor C2 is 1uf, 3rd capacitor C3 is 18uf, 4th capacitor C4 is 47uf, 5th capacitor C5 is 62uf, 6th capacitor C6 is 102uf, 7th capacitor C7 is 101uf, 8th capacitor C8 is 103uf, 9th capacitor C9 is 100uf, first diode VD1 and the second diode VD2 is the diode of model IN4148, first K switch 1 and second switch K2 are common on-off type switch, variable inductor L is the coil of 6T, transistor VT is the transistor of model 9018, bulb LED is light-emitting diode, battery E is 3V dc-battery, monitoring headpone interface CK is the earphone jack of 3.5mm, microphone MIC is the one in carbon dust formula microphone or dynamic microphones, transmitting antenna ANT is any antenna.
Claims (1)
1. the inner pickup circuit of intercom, is characterized in that: comprise the first resistor to the 6th resistor, first capacitor is to the 9th capacitor, first diode, second diode, first switch, second switch, variable inductor, transistor, bulb, battery, monitoring headpone interface, microphone and antenna, the positive pole of described battery is connected with the first end of described second switch, the second end of described second switch respectively with the positive pole of described bulb, the first end of described 9th capacitor, the first end of described 8th capacitor, the first end of described variable inductor, the first end of described 3rd capacitor, the first end of described 3rd resistor is connected with the first end of described first switch, and the negative pole of described bulb is connected with the first end of described 6th resistor, the second end of described variable inductor respectively with the first end of described 4th capacitor, the first end of described 5th capacitor, second end of described 3rd capacitor is connected with the collector electrode of described transistor, and the second end of described 4th capacitor is connected with described antenna, the second end of described 5th capacitor respectively with the first end of described 7th capacitor, the emitter of described transistor is connected with the first end of described 5th resistor, the second end of described 3rd resistor respectively with the base stage of described transistor, the first end of described 6th capacitor is connected with the first end of described second capacitor, second end of described first switch is connected with the first end of described first resistor, second end of described first resistor is connected with the first end of described microphone and the first end of described first capacitor respectively, second end of described first capacitor is connected with the first end of described second resistor, the second end of described second resistor with respectively with the second end of described second capacitor, the negative pole of described second diode, the positive pole of described first diode is connected with the first end of described 4th resistor, and the second end of described 4th resistor is connected with the first end of described monitoring headpone interface, the second end of described microphone respectively with the second end of described monitoring headpone interface, the negative pole of described first diode, the positive pole of described second diode, second end of described 6th capacitor, second end of described 5th resistor, second end of described 7th capacitor, second end of described 8th capacitor, second end of described 9th capacitor, second end of described 6th resistor is connected with the negative pole of described battery,
Each component parameters above-mentioned is selected as follows:
First resistor is 10K Ω, second resistor is 2.7K Ω, 3rd resistor is 27K Ω, 4th resistor is 68K Ω, 5th resistor is 100 Ω, 6th resistor is 680 Ω, first capacitor is 4.7uf, second capacitor is 1uf, 3rd capacitor is 18uf, 4th capacitor is 47uf, 5th capacitor is 62uf, 6th capacitor is 102uf, 7th capacitor is 101uf, 8th capacitor is 103uf, 9th capacitor is 100uf, first diode and the second diode are the diode of model IN4148, first switch and second switch are common on-off type switch, variable inductor is the coil of 6T, transistor is the transistor of model 9018, bulb is light-emitting diode, battery is 3V dc-battery, monitoring headpone interface is the earphone jack of 3.5mm, microphone is the one in carbon dust formula microphone or dynamic microphones.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420367965.XU CN204217113U (en) | 2014-07-04 | 2014-07-04 | The inner pickup circuit of a kind of intercom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420367965.XU CN204217113U (en) | 2014-07-04 | 2014-07-04 | The inner pickup circuit of a kind of intercom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204217113U true CN204217113U (en) | 2015-03-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420367965.XU Expired - Fee Related CN204217113U (en) | 2014-07-04 | 2014-07-04 | The inner pickup circuit of a kind of intercom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204217113U (en) |
-
2014
- 2014-07-04 CN CN201420367965.XU patent/CN204217113U/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: 20150318 Termination date: 20150704 |
|
| EXPY | Termination of patent right or utility model |