CN201008148Y - Synchronous offset radio frequency transmitters - Google Patents
Synchronous offset radio frequency transmitters Download PDFInfo
- Publication number
- CN201008148Y CN201008148Y CNU200720089584XU CN200720089584U CN201008148Y CN 201008148 Y CN201008148 Y CN 201008148Y CN U200720089584X U CNU200720089584X U CN U200720089584XU CN 200720089584 U CN200720089584 U CN 200720089584U CN 201008148 Y CN201008148 Y CN 201008148Y
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- circuit
- radio frequency
- triode
- output
- input
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Abstract
The utility model discloses a sync offset radio frequency transmitter, which comprises a signal input amplifying circuit, a control and modulation oscillation circuit, wherein the output end of the control and modulation oscillation circuit is connected with the input end of a radio frequency output circuit, the output end of the signal input amplifying circuit is connected with the input end of an offset signal control and modulation sync circuit on a radio frequency tube, the output end of the offset signal control and modulation sync circuit on the radio frequency tube is respectively connected with the input end of the control and modulation oscillation circuit, the input end of the radio frequency output circuit. The utility model has the advantage that the offset signal control and modulation sync circuit on a radio frequency tube is arranged on the output end of the signal input amplifying circuit, which not only saves a plurality of grade driving and amplifying circuit, but also makes miniature input signal be well amplified by the radio frequency sending tube to realize high sending power under low voltage working condition.
Description
Technical field
The utility model relates to radio frequency sending set, especially relates to synchronization bias formula radio frequency sending set.
Background technology
Commercially available radiofrequency launcher, the neither upper offset circuit that is provided with of its radio-frequency transmissions pipe.Though can make the radio-frequency transmissions pipe be operated in best magnifying state because the upper offset circuit is set, simultaneously also cause the static working current of radiating circuit bigger, the circuit overall performance descends, and causes battery power consumption big and the operating time is short.Therefore, people take not establish biasing circuit or the below-center offset circuit is set more, and in order to improve transmitting power, just multistage promotion amplifying circuit must be set between carrier oscillation circuit and radio-frequency transmissions circuit, improve supply power voltage, but the raising of supply power voltage often causes the damage of radio-frequency transmissions pipe, has shortened the useful life of radiofrequency launcher.
The utility model content
The utility model purpose is to provide the synchronization bias formula that a kind of operating voltage is low, transmitting power is big radio frequency sending set.
For achieving the above object, the utility model can be taked following technical proposals:
Synchronization bias formula radio frequency sending set described in the utility model, it comprises the signal input amplifying circuit, the modulation control oscillation circuit, the output of described modulation control oscillation circuit is electrically connected with the input of rf output circuit; The output of described signal input amplifying circuit is electrically connected with the input of radio-frequency (RF) tube upper offset modulation signal synchronization control circuit; The output of described radio-frequency (RF) tube upper offset modulation signal synchronization control circuit is electrically connected with described modulation control oscillation circuit input, rf output circuit input respectively.
Described signal input amplifying circuit is made of triode; The triode of signal input amplifying circuit and its emitter resistance constitute emitter follower, the other end of described emitter resistance is electrically connected with triode base stage in the rf output circuit, and be coupled by electric capacity and vibration triode collector electrode, the other end of described another resistance of emitter is electrically connected with the base stage of modulation control triode, and the collector electrode of modulation control triode is electrically connected with vibration triode base stage in modulating control oscillation circuit by crystal oscillator.
The utility model advantage is to be arranged on the radio-frequency (RF) tube upper offset modulation signal synchronization control circuit of described signal input amplifying circuit output, and the output of radio-frequency (RF) tube upper offset modulation signal synchronization control circuit is electrically connected with described modulation control oscillation circuit input, rf output circuit input respectively; Therefore, when the signal input amplifying circuit does not have input signal, emitter follower is not worked, modulation control oscillation circuit, rf output circuit quit work because of supreme bias voltage, its static working current is almost nil, greatly reduce the operating voltage and the power consumption of circuit, the operating time that has prolonged battery is long.And when input signal, emitter follower work, provide a synchronous upper offset voltage to modulation control oscillation circuit, rf output circuit, make the radio-frequency transmissions pipe be operated in best magnifying state, this has not only saved multistage promotion amplifying circuit, simultaneously because the setting of upper offset voltage, make the good amplification that under small input signal situation, also can obtain the radio-frequency transmissions pipe; Thereby be implemented in the low voltage operating state and be issued to the high transmit power purpose.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the schematic block circuit diagram of Fig. 1.
Embodiment
As shown in the figure, synchronization bias formula radio frequency sending set described in the utility model, it comprises the signal input amplifying circuit, the modulation control oscillation circuit, the output of described modulation control oscillation circuit is electrically connected with the input of rf output circuit; The output of described signal input amplifying circuit is electrically connected with the input of radio-frequency (RF) tube upper offset modulation signal synchronization control circuit; The output of described radio-frequency (RF) tube upper offset modulation signal synchronization control circuit is electrically connected with described modulation control oscillation circuit input, rf output circuit input respectively.Described signal input amplifying circuit is made of triode T1; Triode T1 and its emitter resistance R1, R2 constitute emitter follower, and the other end of described emitter resistance R1 is electrically connected with triode T4 base stage in the rf output circuit, and is coupled by the capacitor C 3 and the triode T3 collector electrode that vibrates; The other end of described emitter resistance R2 is electrically connected with the base stage of modulating control triode T2, and the vibration triode T3 base stage during the collector electrode of modulation control triode T2 passes through crystal oscillator SAW and modulates control oscillation circuit is electrically connected.
Claims (2)
1. synchronization bias formula radio frequency sending set, it comprises the signal input amplifying circuit, the modulation control oscillation circuit, the output of described modulation control oscillation circuit is electrically connected with the input of rf output circuit; It is characterized in that: the output of described signal input amplifying circuit is electrically connected with the input of radio-frequency (RF) tube upper offset modulation signal synchronization control circuit; The output of described radio-frequency (RF) tube upper offset modulation signal synchronization control circuit is electrically connected with described modulation control oscillation circuit input, rf output circuit input respectively.
2. synchronization bias formula radio frequency sending set according to claim 1 is characterized in that: described signal input amplifying circuit is made of triode (T1); Triode (T1) and its emitter resistance (R1, R2) constitute emitter follower, the other end of described emitter resistance (R1) is electrically connected with triode (T4) base stage in the rf output circuit, and is coupled by electric capacity (C3) and vibration triode (T3) collector electrode; The other end of described emitter resistance (R2) is electrically connected with the base stage of modulating control triode (T2), and vibration triode (T3) base stage during the collector electrode of modulation control triode (T2) passes through crystal oscillator (SAW) and modulates control oscillation circuit is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720089584XU CN201008148Y (en) | 2007-02-15 | 2007-02-15 | Synchronous offset radio frequency transmitters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720089584XU CN201008148Y (en) | 2007-02-15 | 2007-02-15 | Synchronous offset radio frequency transmitters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201008148Y true CN201008148Y (en) | 2008-01-16 |
Family
ID=39004097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720089584XU Expired - Fee Related CN201008148Y (en) | 2007-02-15 | 2007-02-15 | Synchronous offset radio frequency transmitters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201008148Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682974A (en) * | 2015-03-20 | 2015-06-03 | 周玉林 | 433 MHz wireless transmitter |
-
2007
- 2007-02-15 CN CNU200720089584XU patent/CN201008148Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682974A (en) * | 2015-03-20 | 2015-06-03 | 周玉林 | 433 MHz wireless transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080116 Termination date: 20110215 |