CN202551140U - Host talking and receiving circuit for voice-frequency circuit of entrance guard talkback - Google Patents
Host talking and receiving circuit for voice-frequency circuit of entrance guard talkback Download PDFInfo
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- CN202551140U CN202551140U CN2012201761453U CN201220176145U CN202551140U CN 202551140 U CN202551140 U CN 202551140U CN 2012201761453 U CN2012201761453 U CN 2012201761453U CN 201220176145 U CN201220176145 U CN 201220176145U CN 202551140 U CN202551140 U CN 202551140U
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Abstract
The utility model relates to a host talking and receiving circuit for a voice-frequency circuit of an entrance guard talkback. The host talking and receiving circuit for the voice-frequency circuit of the entrance guard talkback comprises a central processing unit (CPU) control module, a receiving amplifying circuit module, a talking amplifying circuit module, a first loudspeaker, a first microphone, a host voice frequency input bus and a host voice frequency output bus, wherein the input and output ends of the receiving amplifying circuit module and the talking amplifying circuit module are electrically connected to the input and output ends of the CPU control module; the host voice frequency input bus is electrically connected to the input end of the receiving amplifying circuit module; the input end of the first loudspeaker is electrically connected to the output end of the talking amplifying circuit module; the output end of the first microphone is electrically connected to the input end of the talking amplifying circuit module; the host voice frequency output bus is electrically connected with the output end of the talking amplifying circuit module; and the host is connected with an extension set through the host voice frequency input bus and the host voice frequency output bus.
Description
Technical field
The utility model relates to the voicefrequency circuit of gate inhibition's intercommunication, is specifically related to the main frame talking and receiving circuit of gate inhibition's intercommunication voicefrequency circuit.
Background technology
Gate inhibition's intercom system mainly is made up of main frame, extension set, ups power, electric control lock and door closer etc.Wherein main frame is the control core of gate inhibition's intercom system, and the transmission signals of each family extension set and electric lock control signal etc. are the control through main frame all.Extension set is a kind of gate inhibition's intercommunication phone, is used for carrying out intercommunication with main frame.
The voicefrequency circuit of gate inhibition's intercommunication comprises the talking and receiving circuit of main frame and the talking and receiving circuit of extension set, and the talking and receiving circuit of main frame is connected with the talking and receiving circuit of extension set through audio-frequency bus.In the talking and receiving circuit of existing extension set, as shown in Figure 1, under talking state; Telecommunication circuit in working order down; Voice change into speech waveform through the extension set microphone with voice, through the B level input that the first order amplifier triode Q12 of extension set is given in capacitor C 19 couplings, are exported by the C level of triode Q12; Export to the B level of second level amplifier triode Q13 through capacitor C 20; Via the output of the C level of triode Q13, the one tunnel forms the acoustic circuit that disappears through resistance R 48, R51, R50 to the E level of triode Q13, and another road is coupled through capacitor C 12 and is coupled to the audio-frequency bus decoder through audio frequency transformer T1 again and outputs to main frame;
PAC circuit is transferred to extension set by audio-frequency bus; The control circuit of extension set is through resistance R 48, resistance R 51 and audio frequency transformer T1 coupling; Be adjusted to the 3rd pin input of power amplifier LM386 again through capacitor C 22, resistance R 52, potentiometer RV3; Amplify the back once more by the output of the 5th pin, restore voice for loud speaker SP1 through capacitor C 26 couplings.
In the existing main frame talking and receiving circuit; As shown in Figures 2 and 3; The telecommunication circuit of main frame: down, voice change into speech waveform through the main frame microphone with voice in working order, amplify for the 11st pin input of hands-free voice integrated chip MC34118 through capacitor C 11 couplings; Export by the 10th pin; One the tunnel feeds back to 11 pin, and the 17th pin detector that one tunnel output is exported to hands-free voice integrated chip MC34118 through resistance R 32, capacitor C 8 is regulated control, also has one the tunnel to export to the 9th pin transmission attenuation device of hands-free voice integrated chip MC34118 through capacitor C 12 couplings; By the 8th pin output of hands-free voice integrated chip MC34118, export to the 7th pin of hands-free voice integrated chip MC34118 again through capacitor C 9 couplings; The 6th pin one tunnel of hands-free voice integrated chip MC34118 is through the 2nd pin of capacitor C 41, resistance R 34 input computing amplification appliance L324; Another road connects the 5th pin of hands-free voice integrated chip MC34118, and imports the 3rd pin of computing amplification appliance L324 through capacitor C 42, resistance R 46; The 1st pin of computing amplification appliance L324 is exported to the 5th pin of next stage amplifier; And by the output of the 7th pin of this amplifier; Triode Q14 through the switching circuit effect after resistance R 35 decay and electric capacity E9, E10 coupling controls to audio-frequency bus, is transferred to extension set at last;
Main frame PAC circuit: in working order down; The voice signal of extension set is from the control circuit of audio-frequency bus input main frame; Again through 13 pin of electric capacity E9, E10 coupling back input operational amplifier LM324, the 14 pin output of operational amplifier LM324, and be coupled through capacitor C 18, C17 and be input to the 2nd pin filter amplifier of hands-free voice integrated chip MC34118; The 26th pin that connects hands-free voice integrated chip MC34118 via the 1st pin output back one tunnel; Another road connects the 21st pin of hands-free voice integrated chip MC34118, and the 22nd pin output of hands-free voice integrated chip MC34118 is exported to the 3rd pin of power amplifier LM386 through resistance R 67 adjustings, capacitor C 20 couplings; Amplify the back once more by the output of the 5th pin, and be coupled through electric capacity E26 and restore voice to loud speaker.
Visible by the foregoing circuit schematic diagram, the talking and receiving circuit of above-mentioned main frame is comparatively loaded down with trivial details, cost is higher, brings very big inconvenience to maintenance.
The utility model content
The voicefrequency circuit of gate inhibition's intercommunication comprises main frame talking and receiving circuit and extension set talking and receiving circuit; The utility model technical problem to be solved is; The main frame talking and receiving circuit is improved; A kind of main frame PAC circuit of with low cost, the simple gate inhibition's intercommunication of circuit voicefrequency circuit is provided, so that the maintenance personal safeguards.
In order to solve the problems of the technologies described above; The technical scheme that the utility model adopted is; A kind of main frame talking and receiving circuit of gate inhibition's intercommunication voicefrequency circuit; Comprise the CPU control module, talked about the amplifying circuit module, send words amplifying circuit module, first loud speaker, first microphone, main frame audio frequency input bus and main frame audio frequency output bus; Saidly talked about the input/output terminal that amplifying circuit module and the input/output terminal that send words amplifying circuit module are electrically connected at the CPU control module; Said main frame audio frequency input bus is electrically connected at the input of being talked about the amplifying circuit module, and the input of said first loud speaker is electrically connected at the output of being talked about the amplifying circuit module, and the output of said first microphone is electrically connected at the input that send words amplifying circuit module; Said main frame audio frequency output bus is electrically connected at the output that send words amplifying circuit module, and this main frame is connected with extension set with main frame audio frequency output bus through main frame audio frequency input bus.
Corresponding; Its extension set talking and receiving circuit comprises extension set audio frequency input bus, extension set audio frequency output bus, send words amplifying circuit module, second microphone, second loud speaker; Said extension set audio frequency input bus is electrically connected at the input of second loud speaker; The output of said second microphone is electrically connected at the input that send words amplifying circuit module; The said output of words amplifying circuit module that send is electrically connected at extension set audio frequency output bus, and this extension set is connected with main frame with extension set audio frequency output bus through extension set audio frequency input bus.
Compare with the prior art described in the background technology, the utlity model has following advantage:
1. the extension set talking and receiving circuit of the utility model is more simple: the extension set PAC circuit in the background technology is transferred to extension set by audio-frequency bus; The control circuit of extension set is through resistance R 48, resistance R 51 and audio frequency transformer T1 coupling; Be adjusted to the 3rd pin input of power amplifier LM386 again through capacitor C 22, resistance R 52, potentiometer RV3, amplify the back once more, restore voice for loud speaker SP1 through capacitor C 26 couplings by the output of the 5th pin; And the utility model simply directly restores voice through capacitive coupling to loud speaker for outputing to extension set by audio-frequency bus again; Simplified PAC circuit greatly, reduced cost, be convenient to the maintenance personal and safeguard;
2. the main frame telecommunication circuit of the utility model is more simple; Main frame telecommunication circuit in the background technology is to adopt hands-free voice integrated chip MC34118, operational amplifier LM324, and the utility model send words mainly by the control of CPU control module, and circuit is simple; Cost is low, is convenient to the maintenance personal and safeguards;
3. the main frame PAC circuit of the utility model is more simple; Main frame PAC circuit in the background technology is to adopt hands-free voice integrated chip MC34118, operational amplifier LM324, power amplifier LM386; And the utility model PAC circuit adopts discrete amplifier of one-level and power amplifier LM386, and controlled by the CPU control module by words, and circuit is simple; Cost is low, is convenient to the maintenance personal and safeguards;
4. the mode of the main frame of the utility model coupling extension set is more simple; The mode that main frame in the background technology is coupled to extension set is to use power amplifier LM386, is directly to be coupled through electric capacity and the utility model is coupled to extension set from main frame, and circuit is simple; Cost is low, is convenient to the maintenance personal and safeguards.
Description of drawings
Fig. 1 is the talking and receiving circuit schematic diagram of the existing extension set described in the utility model background technology.
Fig. 2 is the part talking and receiving circuit schematic diagram of the existing main frame described in the utility model background technology.
Fig. 3 is the part talking and receiving circuit schematic diagram of the existing main frame described in the utility model background technology.
Fig. 4 is the module frame chart of the main frame talking and receiving circuit of the utility model.
Fig. 5 a is the module frame chart of the extension set telecommunication circuit of the utility model.
Fig. 5 b is the module frame chart of the extension set PAC circuit of the utility model.
Fig. 6 is the circuit theory diagrams of the extension set talking and receiving circuit of the utility model.
Fig. 7 is the circuit theory diagrams of the main frame talking and receiving circuit of the utility model.
Embodiment
Combine accompanying drawing and embodiment that the utility model is further specified at present.
The voicefrequency circuit of gate inhibition's intercommunication comprises main frame talking and receiving circuit and extension set talking and receiving circuit; As shown in Figure 4; The main frame talking and receiving circuit of the utility model comprises CPU control module 1, talked about amplifying circuit module 2, send words amplifying circuit module 3, first loud speaker 4, first microphone 5, main frame audio frequency input bus 6 and main frame audio frequency output bus 7; Saidly talked about the input/output terminal that amplifying circuit module 2 and the input/output terminal that send words amplifying circuit module 3 are electrically connected at CPU control module 1; Said main frame audio frequency input bus 6 is electrically connected at the input of being talked about amplifying circuit module 2; The input of said first loud speaker 4 is electrically connected at the output of being talked about amplifying circuit module 2; The output of said first microphone 5 is electrically connected at the input that send words amplifying circuit module 3, and said main frame audio frequency output bus 7 is electrically connected at the output that send words amplifying circuit module 3, and this main frame is connected with extension set with main frame audio frequency output bus 7 through main frame audio frequency input bus 6.
Corresponding; Shown in Fig. 5 a and Fig. 5 b; Its extension set talking and receiving circuit comprises extension set audio frequency input bus 8, extension set audio frequency output bus 9, send words amplifying circuit module 10, second microphone 11, second loud speaker 12; Said extension set audio frequency input bus 8 is electrically connected at the input of second loud speaker 12; The output of said second microphone 11 is electrically connected at the input that send words amplifying circuit module 10, and the said output of words amplifying circuit module 10 that send is electrically connected at extension set audio frequency output bus 9, and this extension set is connected with main frame with extension set audio frequency output bus 9 through extension set audio frequency input bus 8.
Concrete, as shown in Figure 6, under the talking state; Down, voice change into speech waveform through the extension set microphone with voice to telecommunication circuit in the extension set talking and receiving circuit in working order, give the B utmost point input of the first order amplifier triode Q1 of extension set through capacitor C 1 coupling; C utmost point output by triode Q1; Export to the B utmost point of second level amplifier triode Q2 through capacitor C 3, the C utmost point output by triode Q2 is transferred to audio-frequency bus; It is to output to extension set by audio-frequency bus that extension set receives words, and being coupled through electric capacity E5, E6 restores voice to loud speaker SP1.
Fig. 7 is the talking and receiving circuit of main frame, wherein, and the telecommunication circuit of main frame: under the operating state; Voice change into speech waveform through main frame microphone voice, through the 7th pin of capacitor C 29 coupling input dual-channel audio power amplifier TDA2822, the 1st pin output of amplifying back dual-channel audio power amplifier TDA2822; Through electric capacity E14 coupling, signal is divided into two-way again, and one the tunnel advances single-chip microcomputer (BJ8F105LQ48) 21 pin through AFI_AD detects; When single-chip microcomputer detects signal; Low level of 23 pin output of single-chip microcomputer is closed the switching circuit that send words (Q33 ends, PAC circuit Q32 conducting); Another road is sent to the TDA2030 power amplifier through resistance and electric capacity; Amplify back the 4th pin output from the input of TDA2030 the 1st pin, be transferred to audio-frequency bus through the electric coupling resistance adjustment and output to extension set, restore voice through the capacitive coupling loud speaker;
The main frame PAC circuit: in working order down, the voice signal of extension set transmits the B utmost point input of the triode Q29 of amplifying circuit from the control circuit of audio-frequency bus input main frame through capacitor C 27 couplings; Amplify the C utmost point output of back by triode Q29; Signal is divided into two-way, and one the tunnel advances single-chip microcomputer (BJ8F105LQ48) 22 pin detects, when single-chip microcomputer detects signal; Low level of 24 pin output of single-chip microcomputer; Close the switching circuit of being talked about (Q32 ends, telecommunication circuit Q33 conducting), let the signal of being talked about amplify toward the next stage transmission; Another road connects the 3rd pin of power amplifier LM386 through resistance R 86, capacitor C 24, capacitor C 25, amplifies the 5th pin output of back from power amplifier LM386, and is coupled through electric capacity E12 and restores voice to loud speaker.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the utility model that does not break away from appended claims and limited; Can make various variations to the utility model in form with on the details, be the protection range of the utility model.
Claims (1)
1. the main frame talking and receiving circuit of gate inhibition's intercommunication voicefrequency circuit is characterized in that:
Said main frame talking and receiving circuit comprises the CPU control module, is talked about the amplifying circuit module, send words amplifying circuit module, first loud speaker, first microphone, main frame audio frequency input bus and main frame audio frequency output bus; Saidly talked about the input/output terminal that amplifying circuit module and the input/output terminal that send words amplifying circuit module are electrically connected at the CPU control module; Said main frame audio frequency input bus is electrically connected at the input of being talked about the amplifying circuit module; The input of said first loud speaker is electrically connected at the output of being talked about the amplifying circuit module; The output of said first microphone is electrically connected at the input that send words amplifying circuit module; Said main frame audio frequency output bus is electrically connected at the output that send words amplifying circuit module, and this main frame is connected with extension set with main frame audio frequency output bus through main frame audio frequency input bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201761453U CN202551140U (en) | 2012-04-24 | 2012-04-24 | Host talking and receiving circuit for voice-frequency circuit of entrance guard talkback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201761453U CN202551140U (en) | 2012-04-24 | 2012-04-24 | Host talking and receiving circuit for voice-frequency circuit of entrance guard talkback |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202551140U true CN202551140U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201761453U Expired - Fee Related CN202551140U (en) | 2012-04-24 | 2012-04-24 | Host talking and receiving circuit for voice-frequency circuit of entrance guard talkback |
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| Country | Link |
|---|---|
| CN (1) | CN202551140U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973955A (en) * | 2013-01-28 | 2014-08-06 | 联想(北京)有限公司 | Information processing method and electronic device |
-
2012
- 2012-04-24 CN CN2012201761453U patent/CN202551140U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973955A (en) * | 2013-01-28 | 2014-08-06 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN103973955B (en) * | 2013-01-28 | 2017-08-25 | 联想(北京)有限公司 | A kind of information processing method and electronic equipment |
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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: 20121121 Termination date: 20150424 |
|
| EXPY | Termination of patent right or utility model |