CN2148443Y - Radio simultaneous interpretation arrangement - Google Patents
Radio simultaneous interpretation arrangement Download PDFInfo
- Publication number
- CN2148443Y CN2148443Y CN 92220866 CN92220866U CN2148443Y CN 2148443 Y CN2148443 Y CN 2148443Y CN 92220866 CN92220866 CN 92220866 CN 92220866 U CN92220866 U CN 92220866U CN 2148443 Y CN2148443 Y CN 2148443Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- receiving
- power amplifier
- simultaneous interpretation
- positive
- 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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- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model relates to a wireless simultaneous interpreting device, which is composed of a transmitting part and a receiving part. The transmitting part is composed of a microphone, a low-frequency amplifier, a frequency modulation transmitting circuit and a transmitting antenna. The receiving part is composed of a receiving antenna, a receiving circuit, a power amplifier and a loudspeaker. A waiting protection circuit is connected in series between the receiving circuit and the power amplifier. The utility model has the advantages of simple circuits, high work efficiency and no influence on other people.
Description
The utility model belongs to radio communication equipment, refers in particular to a kind of wireless simultaneous interpretation device.
At present, known simultaneous interpretation device is the purpose that reaches by wired connection, and its circuit complexity, volume is big, failure rate is high and the investment is big, price is high, and wired connection is brought a lot of inconvenience to the user.
The purpose of this utility model is that a kind of circuit of design is simple, low price, wireless simultaneous interpretation device easy to use.
The purpose of this utility model is achieved in that by transmitting and receiving two parts to be formed; radiating portion is to be made of microphone, low frequency amplifier, modulating emission circuit and transmitting antenna; receiving unit is made of reception antenna, receiving circuit, power amplifier and loud speaker; be primarily characterized in that; the first-class circuit to be protected of series connection between receiving circuit and the power amplifier, protective circuit is by a positive-negative-positive triode T
3With two NPN type T
4, T
5Triode is connected in series, T
3Base stage serial connection current-limiting resistance R
3, resistance R
3The other end links to each other T with the receiving circuit output
5Emitter links to each other with the input of power amplifier.
Because the above-mentioned design of employing, the utility model are compared with prior art, circuit is simple, components and parts are few, replaces the wired connection signal with the radio transmission signal, has improved the efficient of work greatly.
Further specify below in conjunction with attached section and embodiment
Fig. 1 is wireless simultaneous interpretation device emission block diagram
Fig. 2 is that wireless simultaneous interpretation device receives block diagram
Fig. 3 is wireless simultaneous interpretation device radiating circuit schematic diagram
Fig. 4 is wireless with a translating equipment receiving circuit schematic diagram
In Fig. 1, Fig. 2, microphone (1), low frequency amplifier (2), modulating emission circuit (3), transmitting antenna (4), reception antenna (5), receiving circuit (6), power amplifier (7), loud speaker (8), wait protective circuit (9).
Fig. 3 is the radiating circuit schematic diagram, and P sends into signal by microphone (1), triode T
1And inclined to one side value resistance R
1, R
2, R
3, isolation capacitance C
1, C
2Form amplifier (2), R
6Regulate the amplitude variation that amplifies the back output signal, triode T
2With capacitor C
6, tunable capacitor C5 forms modulating emission circuit (3), and transmitting antenna (4) is sent signal.
Fig. 4 is the receiving circuit schematic diagram, by reception antenna (5), signal is sent into receiving circuit (6) IC
1The pin 11 of integrated circuit (IC) chip TDA7021, through receiving circuit (6) demodulation from IC
1Pin 1 output, deliver to and wait for protective circuit (9), T
3Pipe conducting work, audio signal is through T
4, T
5Amplify, again by power amplifier (7) IC
2Integrated circuit (IC) chip TDA7050 sends into loud speaker or recorder after amplifying.Main radiating circuit is not worked, receiving circuit (6) pin 1 no-output, T
3End, receiving circuit (6) enters wait state automatically, and loud speaker does not have any signal output.
Claims (2)
1, a kind of wireless simultaneous interpretation device; form by transmitting and receiving two parts; radiating portion is made of microphone (1), low frequency amplifier (2), modulating emission circuit (3) and transmitting antenna (4); receiving unit is made of reception antenna (5), receiving circuit (6), power amplifier (7) and speaker (8), it is characterized in that: series connection first-class circuit to be protected (9), protective circuit (9) are by a positive-negative-positive triode T between receiving circuit (6) and the power amplifier (7)
3With two positive-negative-positive T
4, T
5Triode is connected in series, T
3Base stage serial connection current-limiting resistance R
8, resistance R
8The other end one receiving circuit (7) output connects, T
5Emitter is connected with the power amplifier input.
2, wireless simultaneous interpretation device according to claim 1 is characterized in that the used integrated circuit (IC) chip of receiving circuit (6) is TDA7021.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92220866 CN2148443Y (en) | 1992-09-26 | 1992-09-26 | Radio simultaneous interpretation arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92220866 CN2148443Y (en) | 1992-09-26 | 1992-09-26 | Radio simultaneous interpretation arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2148443Y true CN2148443Y (en) | 1993-12-01 |
Family
ID=33767810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92220866 Expired - Fee Related CN2148443Y (en) | 1992-09-26 | 1992-09-26 | Radio simultaneous interpretation arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2148443Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735195A (en) * | 2003-03-08 | 2015-06-24 | 任文林 | Multifunctional communication device |
| CN104836902A (en) * | 2003-03-08 | 2015-08-12 | 任文林 | Multifunctional communication device |
-
1992
- 1992-09-26 CN CN 92220866 patent/CN2148443Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735195A (en) * | 2003-03-08 | 2015-06-24 | 任文林 | Multifunctional communication device |
| CN104836902A (en) * | 2003-03-08 | 2015-08-12 | 任文林 | Multifunctional communication device |
| CN104836903A (en) * | 2003-03-08 | 2015-08-12 | 任文林 | Multifunctional communication device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |