CN2922294Y - Duplex intercom - Google Patents
Duplex intercom Download PDFInfo
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- CN2922294Y CN2922294Y CN 200620200361 CN200620200361U CN2922294Y CN 2922294 Y CN2922294 Y CN 2922294Y CN 200620200361 CN200620200361 CN 200620200361 CN 200620200361 U CN200620200361 U CN 200620200361U CN 2922294 Y CN2922294 Y CN 2922294Y
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Abstract
The utility model relates to a duplex intercom which comprises a signal receiving channel that is composed by connecting a receiving band-pass filter, a high level circuit, a tuning loop, a frequency mixer, a middle level circuit, a frequency discriminator, a voice decompression expanding circuit, a power magnify circuit, and a loudspeaker in turns and a signal sending channel that is composed by connecting a microphone, a voice decompression expanding circuit, a modulating amplifier, an emission oscillator, a preamplifier, a power amplifier, a emission band-pass filter in turns. The utility model is characterized in that the dual mode antenna of the duplex intercom is connected with a duplexer, and the output of the duplexer is connected with the receiving band-pass filter of the signal receiving channel, and the input end of the duplexer is connected with the emission band-pass filter of the signal sending channel. The utility model can listen to and sending voice simultaneously, which guarantee normal talking of the users.
Description
Technical field
The utility model relates to a kind of duplexing intercom.
Prior art
Existing intercom can only single worker's intercommunication, can not send voice when answering, and can not answer during transmission, when two-way simultaneous sends, all can't hear troublesome poeration mutually.Single worker's talking mode, promptly when both sides conversed, the Party A pressed and sends the key speech, and voice signal is sent, and the Party B listens in addition, and the Party A enters the state of listening to after unclamping and sending key, and by sending the key speech, the Party A receives by the Party B.Intercom can only be in single mode of operation, sends or receive main.When both sides were in transmission or accepting state, then both sides can't hear the other side's voice, sound occurred and omitted.
Summary of the invention
The utility model provides a kind of duplexing intercom, and voice can be listened to and send to this device simultaneously, thereby guarantees user's normal talking.
Being characterized as of this duplex intercom: the antenna that consists of of receive path is connected to duplexer, the output signal of duplexer is successively through receiving bandwidth-limited circuit, High Amplifier Circuit, resonant tank circuit, the mixer of first local oscillator, the first intermediate frequency filtering circuit, intermediate level circuit, the second self oscillating mixer circuit, the second intermediate frequency filtering circuit, the input frequency discriminator, the output signal of frequency discriminator is divided into three the tunnel; It is once the signal receiving circuit input microprocessor, it is two through signal to noise ratio testing circuit input microprocessor, the Third Road signal is separated compressor-expander, is received the muting control circuit input amplifier through voice, the output of amplifier is divided into two-way again, and its audio signal of exporting behind the LM386 power amplifier is received toy trumpet; Its two audio signal of exporting behind the MC34199 power amplifier is received typhon; The output signal that consists of microphone MIC of transmission channel after sending muting control circuit, voice compressor-expander, modulated amplifier, amplitude limiter circuit, emission Voltage-Controlled oscillation circuit VCO, amplifier, preamplifier, power amplifier, transmit band pass filter, is imported duplexer successively; Described duplexing intercom is provided with microprocessor, and the output of microprocessor is connected respectively to power control terminal, the power control terminal of MC34119, reception mute circuit, the transmission muting control circuit of above-mentioned LM386; The output of microprocessor is also connected to the power control terminal of receive path and the power control terminal of sendaisle, the output of microprocessor is input to amplitude limiter circuit in above-mentioned through signaling circuit, the input of microprocessor is connected with keyboard circuit, and the output of microprocessor connects liquid crystal display circuit LCD; Described duplexing intercom is provided with control circuit of phase locking, and the output of control circuit of phase locking has three road signals, and it is input to the mixer of first local oscillator once the reception pressure controller of first local oscillator; It two is input to emission Voltage-Controlled oscillation circuit VCO; It three is connected to microprocessor.
Structural feature of the present utility model is: the signal receive path is provided with secondary voltage controlled oscillator and frequency mixer, and first order IF-FRE is 21.4MHZ, and second level IF-FRE is 455KHZ.Described signal sendaisle is provided with a voltage controlled oscillator and frequency mixer.
The utlity model has following advantage: be a kind of duplexing intercom, can listen to and send voice simultaneously, thereby guarantee user's normal talking, can realize duplexing talking mode similar and mobile phone or phone, promptly the time spent is in and receives and transmit status, does not operate any button at communication process, sound is smooth continuously, sound can not occur and omit phenomenon, equally convenient during use with mobile phone, solved the knotty problem of traditional intercom.
Description of drawings
Fig. 1 is the theory diagram of the utility model embodiment.
Embodiment
Further specify operation principle of the present utility model below in conjunction with embodiment and accompanying drawing.
As shown in Figure 1, comprise by reception bandpass filter, High Amplifier Circuit, resonant tank, frequency mixer, intermediate level circuit, frequency discriminator, compressor-expander separated in voice, the signal receive path that power amplifier and loudspeaker connect and compose successively and by microphone, compressor-expander separated in voice, modulated amplifier, transmitting oscillator, preamplifier, power amplifier, the signal sendaisle that transmit band pass filter connects and composes successively, it is characterized in that: be provided with a duplexer, the dual-mode antenna of duplex intercom connects duplexer, and the output of duplexer is connected to the reception bandpass filter in the signal receive path; The input of duplexer is connected to the transmit band pass filter of signal sendaisle.
The major function that the utility model will be realized is exactly to carry out duplex conversation and other attach feature, and its concrete operation principle is as follows:
The principle of signal sendaisle: MIC will collect audio signal and convert the signal of telecommunication to, after the voice companding is handled, modulate and amplify and amplitude limiting processing, to satisfy the demand of modulation, adopt the mode of frequency modulation to send into the frequency that emission VCO is modulated to emission, carry out power amplification through amplifier, preamplifier, power amplifier, transmit band pass filter only allows spuious power attenuation effective signal send from antenna via duplexer, finishes the process of whole emission.
Signal receive path principle: the faint high-frequency signal that antenna receives is through duplexer and band pass filter, entering High Amplifier Circuit behind the filtering interference signals amplifies, signal after the amplification is through resonant tank filtering once more, selecting useful high-frequency signal enters frequency mixer and carries out mixing from first local oscillation signal that receives VCO, obtain first intermediate-freuqncy signal of 21.4MHz, first intermediate-freuqncy signal input intermediate frequency process integrated circuit MC3361 the 16th pin after intermediate level circuit amplifies enters second mixer stage.Second frequency mixer and the second local frequency 20.945M mixing get the second intermediate-freuqncy signal 455KHz, send into frequency discriminator after giving wave filter, second intermediate-freuqncy signal is reduced into voice signal (by the output of IC the 9th pin) and signaling-information (by the output of IC the 14th pin), signal is amplified by receiver power amplifier LM386, hands-free power amplifier 34119 after voice are separated companding integrated circuit DBL5020 to separate companding and promotes relevant sound horn, finishes the whole process of listening to.
Control signaling principle: the transmission receiving course of control signaling is with the voice channel unanimity.The signaling that desire sends is with the modulated transmission of speech, and receiving circuit is sent into the different function identification of CPU after signal receiving circuit is with signaling detection shaping.Receive VCO, emission VCO, liquid crystal display, emission power, keyboard or the like in order to control.
Other additional function: other additional function as: storage, chord music, clock, alarm clock, press-key lock etc. can reach corresponding target by the programming of CPU.
The difference of duplex intercom and single worker's intercom is, the duplex intercom has one of two VCO (voltage controlled oscillator) to receive an emission, both can work simultaneously, and be operated in different frequency bands, isolate through duplexer in the sending and receiving end, transmitting-receiving is not disturbed mutually, realized the function that receive on the limit and the limit is sent out, reach the purpose of duplexing intercommunication.
The utility model modern design, communication effect is good, and its market prospects are considerable.
Claims (3)
1. duplexing intercom, comprise receive path circuit and transmission channel circuit composition, it is characterized in that: the antenna that consists of of receive path circuit is connected to duplexer, the output signal of duplexer is successively through after the mixer of the mixer that receives bandwidth-limited circuit, High Amplifier Circuit, resonant tank circuit, first local oscillator, the first intermediate frequency filtering circuit, intermediate level circuit, second local oscillator, the second intermediate frequency filtering circuit, the input frequency discriminator, the output signal of frequency discriminator is divided into three the tunnel; It is once the signal receiving circuit input microprocessor, it is two through signal to noise ratio testing circuit input microprocessor, the Third Road signal is separated compressor-expander, is received the muting control circuit input amplifier through voice, the output of amplifier is divided into two-way again, and its audio signal of exporting behind the LM386 power amplifier is received toy trumpet; Its two audio signal of exporting behind the MC34199 power amplifier is received typhon; The output signal that consists of microphone MIC of transmission channel after sending muting control circuit, voice compressor-expander, modulated amplifier, amplitude limiter circuit, emission Voltage-Controlled oscillation circuit VCO, amplifier, preamplifier, power amplifier, transmit band pass filter, is imported duplexer successively; Described duplexing intercom is provided with microprocessor, and the output of microprocessor is connected respectively to power control terminal, the power control terminal of MC34119, reception mute circuit, the transmission muting control circuit of above-mentioned LM386; The output of microprocessor is also connected to the power control terminal of receive path and the power control terminal of sendaisle, the output of microprocessor is input to amplitude limiter circuit in above-mentioned through signaling circuit, the input of microprocessor is connected with keyboard circuit, and the output of microprocessor connects liquid crystal display circuit LCD; Described duplexing intercom is provided with control circuit of phase locking, and the output of control circuit of phase locking has three road signals, and it is input to the mixer of first local oscillator once the reception pressure controller of first local oscillator; It two is input to emission Voltage-Controlled oscillation circuit VCO; It three is connected to microprocessor.
2. duplexing intercom according to claim 1 is characterized in that: described signal receive path is provided with secondary voltage controlled oscillator and frequency mixer, and first order IF-FRE is 21.4MHZ, and second level IF-FRE is 455KHZ
3. duplexing intercom according to claim 1 is characterized in that: described signal sendaisle is provided with a voltage controlled oscillator and frequency mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620200361 CN2922294Y (en) | 2006-04-13 | 2006-04-13 | Duplex intercom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620200361 CN2922294Y (en) | 2006-04-13 | 2006-04-13 | Duplex intercom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2922294Y true CN2922294Y (en) | 2007-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620200361 Expired - Fee Related CN2922294Y (en) | 2006-04-13 | 2006-04-13 | Duplex intercom |
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| Country | Link |
|---|---|
| CN (1) | CN2922294Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064842A (en) * | 2010-11-17 | 2011-05-18 | 北京北方烽火科技有限公司 | Method and device for frequency sweep |
| CN102932703A (en) * | 2012-10-17 | 2013-02-13 | 杨志豪 | Wireless microphone |
| CN103227659A (en) * | 2013-03-04 | 2013-07-31 | 福建省万华电子科技有限公司 | Digital DPMR (digital private mobile radio) interphone based on single-point modulation of digital frequency synthesizer |
| CN103248391A (en) * | 2013-03-04 | 2013-08-14 | 福建省万华电子科技有限公司 | Digital DMR interphone using digital frequency synthesizer as local oscillator |
| CN104390726A (en) * | 2014-11-10 | 2015-03-04 | 上海鸿晔电子科技有限公司 | Passive wireless temperature measuring device |
| CN105071822A (en) * | 2012-04-18 | 2015-11-18 | 泉州欧讯电子有限公司 | Vehicle-mounted intercom having a dual-band duplex cross-band transfer function |
| CN111082825A (en) * | 2019-11-29 | 2020-04-28 | 天津七六四通信导航技术有限公司 | Wireless full duplex intercom device |
| CN112865829A (en) * | 2020-12-29 | 2021-05-28 | 泉州市琪祥电子科技有限公司 | Full-duplex interphone and implementation method thereof |
-
2006
- 2006-04-13 CN CN 200620200361 patent/CN2922294Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064842A (en) * | 2010-11-17 | 2011-05-18 | 北京北方烽火科技有限公司 | Method and device for frequency sweep |
| CN105071822A (en) * | 2012-04-18 | 2015-11-18 | 泉州欧讯电子有限公司 | Vehicle-mounted intercom having a dual-band duplex cross-band transfer function |
| CN102932703A (en) * | 2012-10-17 | 2013-02-13 | 杨志豪 | Wireless microphone |
| CN103227659A (en) * | 2013-03-04 | 2013-07-31 | 福建省万华电子科技有限公司 | Digital DPMR (digital private mobile radio) interphone based on single-point modulation of digital frequency synthesizer |
| CN103248391A (en) * | 2013-03-04 | 2013-08-14 | 福建省万华电子科技有限公司 | Digital DMR interphone using digital frequency synthesizer as local oscillator |
| CN104390726A (en) * | 2014-11-10 | 2015-03-04 | 上海鸿晔电子科技有限公司 | Passive wireless temperature measuring device |
| CN111082825A (en) * | 2019-11-29 | 2020-04-28 | 天津七六四通信导航技术有限公司 | Wireless full duplex intercom device |
| CN112865829A (en) * | 2020-12-29 | 2021-05-28 | 泉州市琪祥电子科技有限公司 | Full-duplex interphone and implementation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Fujian Top Way Intelligent Science & Technology Co., Ltd. Assignor: Lin Wen Contract record no.: 2010350000111 Denomination of utility model: Infrared full duplex intercom circuit Granted publication date: 20070711 License type: Exclusive License Record date: 20100613 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070711 Termination date: 20130413 |