CN100405747C - Radio with interphone - Google Patents
Radio with interphone Download PDFInfo
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- CN100405747C CN100405747C CNB2006100610949A CN200610061094A CN100405747C CN 100405747 C CN100405747 C CN 100405747C CN B2006100610949 A CNB2006100610949 A CN B2006100610949A CN 200610061094 A CN200610061094 A CN 200610061094A CN 100405747 C CN100405747 C CN 100405747C
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Abstract
The present invention discloses a radio with an interphone, which aims to achieve the technical purposes of causing the radio to have the advantages of high frequency precision and stability, good selectivity and sensitivity and function of interphone. The radio with an interphone of the present invention is provided with a radio circuit. An antenna input circuit is connected with a modulating and transmitting circuit which is connected with a microphone. A mixing frequency circuit is connected with a crystal local oscillation circuit. A power control circuit is connected between a silencing circuit and a power amplifying circuit. Compared with the existing technologies, the present invention uses a radio integrate circuit as an interphone receiving circuit, obtains a signal from the quieting or silencing or tuning indication of the integrate circuit of the radio to control the volume or power of the power amplifying part, and uses the working mode of the common collector and the common emitter of a triode when speaking and receiving a radio, which realizes the high selectivity and the wide transmission bands of antenna input.
Description
Technical field
The present invention relates to a kind of broadcast receiver, particularly a kind of broadcast receiver that has intercom.
Background technology
Broadcast receiver has easy to use, the cheap price of its complete machine that causes of used separating component is also very cheap, liked by the consumer, the integrated circuit of radio receiver of prior art mostly is and uses the inductance capacitance oscillating circuit, its frequency accuracy and poor stability, and the temperature rise of integrated circuit also can cause big frequency change; In integrated circuit of radio receiver, be provided with squelch circuit more, can turn volume down in the time of a little less than no signal or signal, but can not accomplish to close sound or amplifier power supply; The antenna input circuit of integrated circuit of radio receiver requires receive frequency range wide, and promptly pass band causes its selectivity relatively poor.The higher price of complete machine that causes of the components and parts price that intercom adopted of prior art is also high, and the 9V battery valency Gao Bingnan of its use purchases, and causes using the user of intercom less.
Summary of the invention
The purpose of this invention is to provide a kind of broadcast receiver that has intercom, the technical problem that solves is to make broadcast receiver when intercommunication, has very high frequency accuracy and stability, higher selectivity and sensitivity, and can close sound a little less than no signal or signal the time or cut off amplifier power supply, have the function of intercommunication.
The present invention is by the following technical solutions: a kind of broadcast receiver that has intercom, has the antenna input circuit that is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit and power amplification circuit, frequency-discriminating circuit is connected with mute circuit, mixting circuit connects the electronic tuning circuit through the LC local oscillation circuit, the electronic tuning circuit also is connected with frequency-discriminating circuit with intermediate frequency amplifier circuit respectively, described antenna input circuit is connected with modulation transmitter, the modulation transmitter tube of answering, mixting circuit is connected with the crystal local oscillation circuit, is connected with power supply or volume control circuit between mute circuit and the power amplification circuit.
High-frequency amplifier circuit of the present invention, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit, power amplification circuit, LC local oscillation circuit, electronic tuning circuit and mute circuit adopt integrated circuit of radio receiver CD9088, its 11 pin connects first transistor collector of antenna input circuit, 12 pin connect first transistor emitter of antenna input circuit, 5 pin are connected through the emitter of first switch with second triode of crystal local oscillation circuit, 1 pin connects the base stage of power supply or volume control circuit the 6th triode, and 2 pin are connected through the collector electrode of potentiometer with the 3rd triode.
The base stage of second triode of crystal local oscillation circuit of the present invention is through the first oscillating crystal ground connection, emitter is through the 22 electric capacity, the 3rd inductance ground connection of parallel connection, be connected to the 20 electric capacity between Base-Emitter, base stage is connected to the 7th resistance over the ground, and base stage is connected to the 6th resistance to power supply.
The collector electrode of the 6th triode of power control circuit of the present invention connects the base stage of the 3rd triode through first resistance.
The base stage of antenna input circuit first triode of the present invention is through the 15 electric capacity, second switch lug machine antenna, emitter is through the 5th grounding through resistance, and emitter is through the 16 electric capacity, first switch connects power supply, and collector electrode connects power supply through the 11 electric capacity and second inductance of parallel connection.
The signal of microphone output of the present invention inputs to the 7th transistor base of modulation transmitter, the signal of its collector electrode output is through the secondary frequency multiplication modulation circuit of second oscillating crystal and the 8th triode composition, amplify through the 9th triode buffering again, launch by FM signal to the earphone antenna after the amplification of the tenth triode, give the power supply of the eight, the 9th and the tenth triode by the booster circuit that the 11 and the 12 triode is formed.
A kind of broadcast receiver that has intercom, has one tunnel antenna input circuit that is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit and power amplification circuit, mixting circuit connects the LC local oscillation circuit, the antenna input circuit that another road is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit and detecting circuit, detecting circuit connects power amplification circuit and tuning indicator circuit, mixting circuit connects the crystal local oscillation circuit, tuning indicator circuit connects frequency-discriminating circuit, described antenna input circuit is connected with modulation transmitter, the modulation transmitter tube of answering is connected with volume control circuit between tuning indicator circuit and the power amplification circuit.
The antenna input circuit that is linked in sequence of the present invention, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit and power amplification circuit, the high-frequency amplifier circuit that another road is linked in sequence, mixting circuit, intermediate frequency amplifier circuit and detecting circuit, detecting circuit connects power amplification circuit and tuning indicator circuit, tuning indicator circuit connects frequency-discriminating circuit, mixting circuit connects the LC local oscillation circuit and adopts integrated circuit of radio receiver 1191, its 10 pin connects the emitter of the 14 triode of antenna input circuit through the 55 electric capacity, and 4 pin connect the collector electrode of the 13 triode of volume control circuit.
The emitter of the 13 triode of volume control circuit of the present invention connects 8 pin of integrated circuit of radio receiver 1191, base stage connects 19 pin of integrated circuit of radio receiver 1191 through the 22 resistance, collector electrode connects potentiometer one end, the potentiometer other end is through low 21 grounding through resistances, and its movable end connects 4 pin of integrated circuit of radio receiver 1191; The base stage of described antenna input circuit the 14 triode connects antenna through the 53 electric capacity, the 4th switch, emitter is through the 28 grounding through resistance, emitter connects 10 pin of integrated circuit of radio receiver 1191 through the 55 electric capacity, and collector electrode connects 8 pin of integrated circuit of radio receiver 1191.
The signal of microphone output of the present invention inputs to the 16 transistor base of modulation transmitter, the signal of its collector electrode output is through the 17 transistor base, the oscillatory modulation circuit that the 17 triode and the 7th oscillating crystal are formed, amplify through the 18 triode buffering again, launch by amplitude-modulated signal to the antenna after the amplification of the 19 triode, the booster circuit that the 20 and the 21 triode is formed is the power supply of the 17, the 18 and the 19 triode; The emitter of the 13 triode of described volume control circuit connects 8 pin of integrated circuit of radio receiver 1191, base stage connects 19 pin of integrated circuit of radio receiver 1191 through the 22 resistance, collector electrode connects potentiometer one end, the potentiometer other end is through low 21 grounding through resistances, and its movable end connects 4 pin of integrated circuit of radio receiver 1191.
The present invention compared with prior art, adopt integrated circuit of radio receiver, make the intercom receiving circuit, use crystal oscillator during intercommunication, Tao Zhen, acoustic filter or other high precision oscillator spare replace the inductance capacitance local oscillation of receiver circuit, control the volume or the power supply of power amplifier part from noise elimination/the quiet or tuning indication number of winning the confidence of wireless integrated circuit, when making peace radio reception with the common collector of triode and the working method of common emitter, realize the passband of antenna input high selectivity and broad, high frequency transmission circuit is powered with booster circuit, because radio reception and the shared wireless integrated circuit of intercommunication have also reduced cost.
Description of drawings
Fig. 1 is the quiet control broadcast receiver of the band frequency modulation intercommunication block diagram of the embodiment of the invention.
Fig. 2 is the FM receiver block diagram of the band amplitude modulation intercommunication of the embodiment of the invention.
Fig. 3 is the band frequency modulation intercommunication squelch control broadcast receiver block diagram of the embodiment of the invention.
Fig. 4 is the tuning indication broadcast receiver of the band frequency modulation intercommunication block diagram of the embodiment of the invention.
Fig. 5 is the circuit theory diagrams of Fig. 1.
Fig. 6 is the circuit theory diagrams of Fig. 2.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.As shown in Figure 1, the quiet control broadcast receiver of band frequency modulation of the present invention intercommunication, comprise the antenna input circuit that is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit and power amplification circuit, frequency-discriminating circuit connects mute circuit, mixting circuit connects the electronic tuning circuit through the LC local oscillation circuit, the electronic tuning circuit is connected with frequency-discriminating circuit with intermediate frequency amplifier circuit respectively, antenna input circuit is connected with modulation transmitter, the modulation transmitter tube of answering, mixting circuit is connected with the crystal local oscillation circuit, is connected with power control circuit between mute circuit and the power amplification circuit.
As shown in Figure 5, the wireless high-frequency amplifier circuit of the quiet control of band frequency modulation of the present invention intercommunication, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit, power amplification circuit, the LC local oscillation circuit, electronic tuning circuit and mute circuit adopt integrated circuit of radio receiver CD9088, can also adopt integrated circuit of radio receiver SC1088 or TDA7088, its 11 pin connects the first triode Q1 collector electrode of antenna input circuit, 12 pin connect the first triode Q1 emitter of antenna input circuit, 5 pin are connected through the emitter of first switch with the second triode Q2 of crystal local oscillation circuit, 1 pin connects the base stage of power supply control or volume circuit the 6th triode Q6, and 2 pin are connected through the collector electrode of potentiometer with the 3rd triode Q3;
The base stage of the second triode Q2 of crystal local oscillation circuit is through the first oscillating crystal CF1 ground connection, emitter is through the 22 capacitor C 22, the 3rd inductance L 3 ground connection of parallel connection, be connected to the 20 capacitor C 20 between base stage and emitter, base stage is connected to the 7th resistance R 7 over the ground, and base stage is connected to the 6th resistance R 6 to the 3V power supply; The collector electrode of the 6th triode Q6 of power control circuit connects the base stage of the 3rd triode Q3 through first resistance R 1;
The base stage of the antenna input circuit first triode Q1 is through the 15 capacitor C 15, second switch lug machine antenna J1, emitter is through the 5th resistance R 5 ground connection, and emitter is through the 16 capacitor C 16, first switch connects the 3V power supply, and collector electrode connects the 3V power supply through the 11 capacitor C 11 and second inductance L 2 of parallel connection;
The signal of microphone output inputs to the 7th triode Q7 base stage of modulation transmitter, the signal of its collector electrode output is through the secondary frequency multiplication modulation circuit of the second oscillating crystal CF2 and the 8th triode Q8 composition, amplify through the 9th triode Q9 buffering again, to earphone antenna J1 emission, give the power supply of the eight, the 9th and the tenth triode by the FM signal after the tenth triode Q10 amplification by the booster circuit that the 11 triode Q11 and the 12 triode Q12 form.
As shown in Figure 5, the wireless course of work of the quiet control of band frequency modulation of the present invention intercommunication: when switch 1 places the radio reception position, when switch 2 places receiving position, the emitter of the first triode Q1 of antenna input circuit is through the 16 capacitor C 16, switch 1B winding 3V positive source (hf channel), the first triode Q1 is in the common emitter working method, and the frequency-selective circuit that the 11 capacitor C 11 and second inductance L 2 are formed has the passband of broad.This moment, crystal local oscillator and modulation transmitter were not worked, and be the same with common broadcast receiver.
When switch 1 places the intercommunication position, when switch 2 places receiving position, the first triode Q1 is operated in common current collection level mode, the 17 capacitor C 17, the 4th inductance L 4 are formed frequency-selective circuit and are had higher selectivity, and the frequency-selective circuit that the 11 capacitor C 11 and second inductance L 2 are formed is for the unobstructed effect of the signal of intercommunication frequency range, be equivalent to directly connect 3V positive source (hf channel), the antenna input circuit is selected 27.255MHZ signal (is example with 27.255MHZ), imports from integrated circuit of radio receiver CD9088 the 12nd pin; The signal 27.325MHZ of crystal local oscillator is through the 21 capacitor C 21, switch 1A group input integrated circuit of radio receiver CD9088 the 5th pin, after the mixing, RC filter frequency-selecting through integrated circuit of radio receiver CD9088 inside obtains the 70KHZ intermediate-freuqncy signal, puts in the warp again, obtain audio signal behind the frequency discrimination, from the output of integrated circuit of radio receiver CD9088 the 2nd pin, behind potentiometer,, transfer the signal of telecommunication to voice signal by earphone to the 4th triode Q4, the 5th triode Q5 power amplification.As shown in Figure 3, the 3rd triode Q3 of power control circuit ends during no signal, and no signal inputs to power amplification the 4th triode Q4 and the 5th triode Q5, closes amplifier power supply, and earphone is noiseless; When signal was arranged, power amplifier was started working, and earphone can be heard sound.As shown in Figure 4, tuning indicator circuit is arranged in the integrated circuit of radio receiver 1191, when be tuned to during the radio station, promote that light-emitting diode is shinny to have the radio station with the prompting user.
When switch 2 places transmitting site, receiving circuit quits work, and the microphone modulation transmitter is started working, this moment microphone voice signal, input to the 7th triode Q7 base stage of modulation transmitter, 2 double-frequency oscillation circuit signal modulation that the signal of its collector electrode output and the 8th triode Q8 and the second oscillating crystal CF2 form, signal behind the frequency modulation amplifies through the 9th triode Q9 buffering again, outwards launch by earphone antenna by the signal after the tenth triode Q13 amplification, be in accepting state this moment in transmitting boundary machine can receive, and receive frequency range is between 10～440MHz.
As shown in Figure 2, the FM receiver of band amplitude modulation intercommunication of the present invention, include one tunnel antenna input circuit, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit and the power amplification circuit that is linked in sequence, mixting circuit connects the LC local oscillation circuit; The antenna input circuit that another road is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit and detecting circuit, detecting circuit connects power amplification circuit and tuning indicator circuit, tuning indicator circuit connects frequency-discriminating circuit, booster circuit and antenna input circuit are connected with modulation transmitter, the modulation transmitter tube of answering is connected with volume control circuit between tuning indicator circuit and the power amplification circuit;
As shown in Figure 6, the FM receiver of band amplitude modulation intercommunication of the present invention, one tunnel antenna input circuit that is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit and power amplification circuit, the high-frequency amplifier circuit that another road is linked in sequence, mixting circuit, intermediate frequency amplifier circuit and detecting circuit, detecting circuit connects power amplification circuit and tuning indicator circuit, tuning indicator circuit connects frequency-discriminating circuit, mixting circuit connects the LC local oscillation circuit and adopts integrated circuit of radio receiver 1191, can also adopt integrated circuit of radio receiver 22425 or 1691, its 10 pin connects the emitter of the 14 triode Q14 of antenna input circuit through the 55 capacitor C 55, and 4 pin connect the collector electrode of the 13 triode Q13 of volume control circuit;
The emitter of the 13 triode Q13 of volume control circuit connects 8 pin of integrated circuit of radio receiver 1191, base stage connects 19 pin of integrated circuit of radio receiver 1191 through the 22 resistance R 22, collector electrode connects potentiometer one end, the potentiometer other end is through the 21 resistance R 21 ground connection, and its movable end connects 4 pin of integrated circuit of radio receiver 1191;
The base stage of the 14 triode Q14 of antenna input circuit connects antenna through the 53 capacitor C 53, the 4th switch, emitter is through the 28 resistance R 28 ground connection, emitter is through the 55 capacitor C 55, connect 10 pin of integrated circuit of radio receiver 1191, collector electrode connects 8 pin of integrated circuit of radio receiver 1191;
The signal of microphone output inputs to the 16 triode Q16 base stage of modulation transmitter, the signal of its collector electrode output is through the 17 triode Q17 base stage, the oscillatory modulation circuit that the 17 triode Q17 and the 7th oscillating crystal CF7 form, amplify through the 18 triode Q18 buffering again, launch by amplitude-modulated signal to the antenna after the 19 triode Q19 amplification, the booster circuit that the 20 triode Q20 and the 21 triode Q21 form is the power supply of the 17, the 18 and the 19 triode.
The base stage of the 15 triode Q15 of crystal local oscillation circuit is through the 3rd oscillating crystal CF3 ground connection, emitter is through the 58 capacitor C the 58, the 18 inductance L 18 ground connection of parallel connection, be connected to the 59 capacitor C 59 between base stage and emitter, base stage is connected to the 30 resistance R 30 over the ground, and base stage is connected to the 29 resistance R 29 to 8 pin of integrated circuit 1191;
As shown in Figure 6, the course of work of the FM receiver of band amplitude modulation intercommunication of the present invention: when switch 3 places the radio reception position, when switch 4 placed receiving position, circuit working is in the radio reception state, and was identical with common broadcast receiver.
When switch 3 places the intercommunication position, when switch 4 places receiving position, integrated circuit of radio receiver IC1191 the 15th pin ground connection, the frequency modulation control receiving unit of integrated circuit of radio receiver IC1191 quits work, and amplitude modulation is partly started working, crystal local oscillator antenna input circuit is started working, and the antenna input circuit is selected 27.255MHZ signal (is example with 27.255MHZ), imports from integrated circuit of radio receiver IC1191 the 10th pin; The signal 27.720MHZ of crystal local oscillator is through the 61 capacitor C 61, input integrated circuit of radio receiver IC1191 the 5th pin, after the mixing,, obtain the 465KHZ intermediate-freuqncy signal through the 5th crystal filter frequency-selecting, put in the warp again, obtain audio signal after the detection, from the output of integrated circuit of radio receiver IC1191 the 23rd pin, input integrated circuit of radio receiver IC1191 the 24th pin power amplifier part, from its 27th pin output, transfer the signal of telecommunication to voice signal again by loudspeaker.When no signal, the 13 triode Q13 ends, the no positive voltage of direct current volume control, and loudspeaker are noiseless, when signal, the 13 triode Q13 conducting, the control of direct current volume has the positive voltage loudspeaker sound.
When switch 4 places transmitting site, receiving circuit quits work, and the microphone modulation transmitter is started working, the voice signal of microphone inputs to the 16 triode Q16 base stage of modulation transmitter at this moment, the signal of its collector electrode output, oscillating circuit with the 17 triode Q17 and the 7th oscillating crystal CF7 composition, signal after the amplitude modulation amplifies through the 18 triode Q18 buffering again, outwards launch by earphone antenna by the FM signal after the 19 triode Q19 amplification to earphone antenna emission, be in accepting state this moment in transmitting boundary machine can receive, and receive frequency range is between 10～440MHz.
The present invention can also use other integrated circuit of radio receiver as TDA7021, SL1800, CD2003, only needs to change the circuit of related circuit coupling part.
Claims (8)
1. broadcast receiver that has intercom, has the antenna input circuit that is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit and power amplification circuit, frequency-discriminating circuit is connected with mute circuit, mixting circuit connects the electronic tuning circuit through the LC local oscillation circuit, the electronic tuning circuit also is connected with frequency-discriminating circuit with intermediate frequency amplifier circuit respectively, it is characterized in that: described antenna input circuit is connected with modulation transmitter, the modulation transmitter tube of answering, mixting circuit is connected with the crystal local oscillation circuit, is connected with power supply or volume control circuit between mute circuit and the power amplification circuit; Described high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit, power amplification circuit, LC local oscillation circuit, electronic tuning circuit and mute circuit adopt integrated circuit of radio receiver CD9088, its 11 pin connects first transistor collector of antenna input circuit, 12 pin connect first transistor emitter of antenna input circuit, 5 pin are connected through the emitter of first switch with second triode of crystal local oscillation circuit, 1 pin connects the base stage of power supply or volume control circuit the 6th triode, and 2 pin are connected through the collector electrode of potentiometer with the 3rd triode.
2. the broadcast receiver that has intercom according to claim 1, it is characterized in that: the base stage of second triode of described crystal local oscillation circuit is through the first oscillating crystal ground connection, emitter is through the 22 electric capacity, the 3rd inductance ground connection of parallel connection, be connected to the 20 electric capacity between Base-Emitter, base stage is connected to the 7th resistance over the ground, and base stage is connected to the 6th resistance to power supply.
3. the broadcast receiver that has intercom according to claim 2 is characterized in that: the collector electrode of the 6th triode of described power control circuit connects the base stage of the 3rd triode through first resistance.
4. the broadcast receiver that has intercom according to claim 3, it is characterized in that: the base stage of described antenna input circuit first triode is through the 15 electric capacity, second switch lug machine antenna, emitter is through the 5th grounding through resistance, emitter is through the 16 electric capacity, first switch connects power supply, and collector electrode connects power supply through the 11 electric capacity and second inductance of parallel connection.
5. the broadcast receiver that has intercom according to claim 4, it is characterized in that: the signal of described microphone output inputs to the 7th transistor base of modulation transmitter, the signal of its collector electrode output is through the secondary frequency multiplication modulation circuit of second oscillating crystal and the 8th triode composition, amplify through the 9th triode buffering again, launch by FM signal to the earphone antenna after the amplification of the tenth triode, give the power supply of the eight, the 9th and the tenth triode by the booster circuit that the 11 and the 12 triode is formed.
6. broadcast receiver that has intercom, has one tunnel antenna input circuit that is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit and power amplification circuit, mixting circuit connects the LC local oscillation circuit, the antenna input circuit that another road is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit and detecting circuit, detecting circuit connects power amplification circuit and tuning indicator circuit, mixting circuit connects the crystal local oscillation circuit, tuning indicator circuit connects frequency-discriminating circuit, it is characterized in that: described antenna input circuit is connected with modulation transmitter, the modulation transmitter tube of answering is connected with volume control circuit between tuning indicator circuit and the power amplification circuit; The described antenna input circuit that is linked in sequence, high-frequency amplifier circuit, mixting circuit, intermediate frequency amplifier circuit, frequency-discriminating circuit and power amplification circuit, the high-frequency amplifier circuit that another road is linked in sequence, mixting circuit, intermediate frequency amplifier circuit and detecting circuit, detecting circuit connects power amplification circuit and tuning indicator circuit, tuning indicator circuit connects frequency-discriminating circuit, mixting circuit connects the LC local oscillation circuit and adopts integrated circuit of radio receiver 1191, its 10 pin connects the emitter of the 14 triode of antenna input circuit through the 55 electric capacity, and 4 pin connect the collector electrode of the 13 triode of volume control circuit.
7. the broadcast receiver that has intercom according to claim 6, it is characterized in that: the emitter of the 13 triode of described volume control circuit connects 8 pin of integrated circuit of radio receiver 1191, base stage connects 19 pin of integrated circuit of radio receiver 1191 through the 22 resistance, collector electrode connects potentiometer one end, the potentiometer other end is through low 21 grounding through resistances, and its movable end connects 4 pin of integrated circuit of radio receiver 1191; The base stage of described antenna input circuit the 14 triode connects antenna through the 53 electric capacity, the 4th switch, emitter is through the 28 grounding through resistance, emitter connects 10 pin of integrated circuit of radio receiver 1191 through the 55 electric capacity, and collector electrode connects 8 pin of integrated circuit of radio receiver 1191.
8. the broadcast receiver that has intercom according to claim 7, it is characterized in that: the signal of described microphone output inputs to the 16 transistor base of modulation transmitter, the signal of its collector electrode output is through the 17 transistor base, the oscillatory modulation circuit that the 17 triode and the 7th oscillating crystal are formed, amplify through the 18 triode buffering again, launch by amplitude-modulated signal to the antenna after the amplification of the 19 triode, the booster circuit that the 20 and the 21 triode is formed is the power supply of the 17, the 18 and the 19 triode; The emitter of the 13 triode of described volume control circuit connects 8 pin of integrated circuit of radio receiver 1191, base stage connects 19 pin of integrated circuit of radio receiver 1191 through the 22 resistance, collector electrode connects potentiometer one end, the potentiometer other end is through low 21 grounding through resistances, and its movable end connects 4 pin of integrated circuit of radio receiver 1191.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100610949A CN100405747C (en) | 2006-06-06 | 2006-06-06 | Radio with interphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100610949A CN100405747C (en) | 2006-06-06 | 2006-06-06 | Radio with interphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1862978A CN1862978A (en) | 2006-11-15 |
| CN100405747C true CN100405747C (en) | 2008-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100610949A Expired - Fee Related CN100405747C (en) | 2006-06-06 | 2006-06-06 | Radio with interphone |
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| Country | Link |
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| CN (1) | CN100405747C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11609128B2 (en) * | 2019-12-10 | 2023-03-21 | Wiliot, LTD. | Single layer LC oscillator |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843203B (en) * | 2012-08-13 | 2017-03-15 | 泉州市琪祥电子科技有限公司 | A kind of automatic silencing circuit |
| CN106210982A (en) * | 2016-06-30 | 2016-12-07 | 大连楼兰科技股份有限公司 | Vehicle-mounted radio control system based on active safe driving and method |
| CN108320486A (en) * | 2018-03-30 | 2018-07-24 | 深圳市全安现代科技有限责任公司 | A kind of remote controler controls system more |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2072299U (en) * | 1990-06-20 | 1991-02-27 | 区少基 | Am.fm radio-dialogue apparatus |
| CN2079836U (en) * | 1990-08-27 | 1991-06-26 | 常州半导体厂 | Intercom with radio |
| CN2133993Y (en) * | 1992-09-25 | 1993-05-19 | 邱洵 | Three-purpose intercom |
| CN2136556Y (en) * | 1992-10-13 | 1993-06-16 | 谭锐 | Electronic noise suppression switch |
| CN2737070Y (en) * | 2004-08-18 | 2005-10-26 | 王占林 | Automatic control circuit for audio signal and power supply of frequency modulation broadcasting receiver-amplifier |
| CN2919696Y (en) * | 2006-06-06 | 2007-07-04 | 李蓉梅 | Radio with interphone |
-
2006
- 2006-06-06 CN CNB2006100610949A patent/CN100405747C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2072299U (en) * | 1990-06-20 | 1991-02-27 | 区少基 | Am.fm radio-dialogue apparatus |
| CN2079836U (en) * | 1990-08-27 | 1991-06-26 | 常州半导体厂 | Intercom with radio |
| CN2133993Y (en) * | 1992-09-25 | 1993-05-19 | 邱洵 | Three-purpose intercom |
| CN2136556Y (en) * | 1992-10-13 | 1993-06-16 | 谭锐 | Electronic noise suppression switch |
| CN2737070Y (en) * | 2004-08-18 | 2005-10-26 | 王占林 | Automatic control circuit for audio signal and power supply of frequency modulation broadcasting receiver-amplifier |
| CN2919696Y (en) * | 2006-06-06 | 2007-07-04 | 李蓉梅 | Radio with interphone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11609128B2 (en) * | 2019-12-10 | 2023-03-21 | Wiliot, LTD. | Single layer LC oscillator |
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| Publication number | Publication date |
|---|---|
| CN1862978A (en) | 2006-11-15 |
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