CN2202376Y - Multi-functional antenna amplifier - Google Patents
Multi-functional antenna amplifier Download PDFInfo
- Publication number
- CN2202376Y CN2202376Y CN 94236975 CN94236975U CN2202376Y CN 2202376 Y CN2202376 Y CN 2202376Y CN 94236975 CN94236975 CN 94236975 CN 94236975 U CN94236975 U CN 94236975U CN 2202376 Y CN2202376 Y CN 2202376Y
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- CN
- China
- Prior art keywords
- amplifier
- sampling device
- voltage sampling
- resistor
- triode
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- Expired - Fee Related
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Abstract
The utility model relates to a multifunctional antenna amplifier. The amplifier is provided with a step-down transformer, a signal separator, a rectifier filter, an amplifying circuit, an antenna interface and a television interface, and also is provided with a voltage sampler and an alarm circuit, wherein, the voltage sampler is arranged between the output end of the step-down transformer and the power input end of the signal separator, and the control end of the alarm circuit is connected with the voltage sampler. The amplifier has a function of amplifying an electric wave signal, and also provides the theft protection of an outdoor unit in the open air. Consequently, a multifunctional amplifier is formed.
Description
The utility model relates to a kind of antenna amplifier antennafire.
Existing antenna amplifier antennafire is made of reducing transformer, demultiplexer, rectifier filter, amplifying circuit, antennal interface and television set interface usually, provide power supply by reducing transformer and rectifier filter for amplifying circuit, allow amplifying circuit that aerial signal is amplified, isolate TV signal through demultiplexer again, deliver to television set through the television set interface.Owing to being arranged at the open air usually, rectifier filter, amplifying circuit and the antennal interface part of existing antenna amplifier antennafire constitute outdoor unit, and therefore very easily stolen, and existing antenna amplifier antennafire there is no anti-theft feature, thus the defective of existing.
The purpose of this utility model is that above-mentioned existing antenna amplifier antennafire is improved, and a kind of amplifier with anti-theft feature is provided.
The utility model improves on the basis of above-mentioned existing antenna amplifier antennafire.In the utility model antenna amplifier antennafire, except that still having reducing transformer, demultiplexer, rectifier filter, amplifying circuit, antennal interface and television set interface, also be provided with voltage sampling device and warning circuit especially.The voltage sampling device is arranged between the power input of the output of reducing transformer and demultiplexer, and the control end of warning circuit and voltage sampling device join.When the antenna amplifier antennafire operate as normal, the electric current of reducing transformer output is sent to the outdoor unit part through voltage sampling device and demultiplexer, and produces a normal pressure drop on the voltage sampling device.And when the burglar cut off or short circuit antenna amplifier antennafire indoor unit and outdoor unit between transmission line and when desiring to steal outdoor unit, the pressure drop on the voltage sampling device will change, cause the alarm indication element work in the warning circuit and send warning.Therefore, this antenna amplifier antennafire has had both anti-theft feature.
The utility model is compared with existing similar antenna amplifier antennafire, except that having the electric wave signal enlarging function, also provides anti-theft protection for being installed on outdoor outdoor unit, thereby has constituted the Multi-Function Antenna amplifier.
Content of the present utility model further illustrates with the following Examples, but content of the present utility model is not limited only to content related among the embodiment.
As shown in Figure 1, the antenna amplifier antennafire among the embodiment has reducing transformer 1, voltage sampling device 2, warning circuit 3, demultiplexer 4, rectifier filter 5, amplifying circuit 6, frequency mixer 7, antennal interface 8 and television set interface 9.Wherein, voltage sampling device 2 is arranged between the power input of the output of reducing transformer 1 and demultiplexer 4, and the control end of warning circuit 3 and voltage sampling device 2 join.As shown in Figure 2, the amplification and the existing amplifier of supply of the power supply of amplifier and TV signal are similar.After the electric wave signal of different frequency is received by antenna, after antennal interface (forming) impedance matching, import in the mixting circuit of forming by low pass filter 7 and (constitute) by L3～L7, C14～C17 and C12 by contact e, f, g, h and impedance matching box B1, B2.Electric wave signal reaches amplification step by step in the three-stage amplifier 6 by coupling capacitance C12 behind the strays ripple beyond the low pass filter filters out passband.In amplifying circuit 6, form first order amplifier by T5, R10, R12, R13, R15 and C11, T4, R9, R11, R14, C9, C10, C13 form second level amplifier, and T3, R4～R8, C5, C7, C8 form third level amplifier.Electric wave signal after the amplification is sent to demultiplexing circuit 4(through transmission line and is made up of Rw1, L1, L2 and C2), split circuit is about to electric wave signal, and to deliver to television set interface 9(be contact TV).On the other hand, alternating current is transformer B1 through reducing transformer 1() after the step-down one tunnel current rectifying and wave filtering circuit 5(that delivers to outdoor unit through demultiplexing circuit form by C3, C4, D3, C6).Low-voltage AC promptly supplies amplifying circuit 6 and frequency mixer 7 operate as normal behind rectifying and wave-filtering.In the present embodiment, work for the special anti-theft warning circuit that is provided with 3 after delivering to the D1 rectification in another road of alternating current after reducing transformer 1 step-down.Warning circuit 3 is made of triode T1, T2, diode D1, D2, resistor R 1, R2, capacitor C 1 and buzzer Y.Wherein, an output and voltage sampling device 2(that the positive pole of diode D1 meets reducing transformer B1 are resistor R 3) an end, one end of the other end of the negative pole of diode D1 and capacitor C1 and resistor R 1 joins, another termination voltage sampling device 2(resistor R 3 of capacitor C1) the other end and triode T1, the emitter of T2, the base stage of another termination triode T1 of resistor R 1, the collector electrode of triode T1 links to each other with the base stage of triode T2 and an end of resistor R 2, the other end of resistor R 2 links to each other with the end of buzzer Y and the negative pole of diode D2, the collector electrode of another termination triode T2 of buzzer Y, the positive pole of diode D2 connects another output of reducing transformer B1., utilize voltage sampling device 2(resistor R 3 herein) monitoring outdoor unit operating state, can be controlled warning circuit 3.When multi-functional amplifier operate as normal, low-voltage AC is delivered to the C point of D3, D3 conducting work through transmission line, c point current potential is low, thereby b point current potential is low, and pressure drop is arranged on the R3, then a point current potential height, the D1 conducting, T1 conducting work, current collection is electronegative potential very, and the T2 base stage is an electronegative potential, T2 is not by working, and buzzer Y does not report to the police.When the people stole Multi-Function Antenna amplifier outdoor unit, transmission line must break, and D3 does not work, the no current potential of c point, and the no current potential of b point, the last no pressure drop of R3, D1 ends, and then T1 ends, and the T1 collector potential raises, and the T2 base potential raises, T2 conducting, Y warning sounding.If the thief attempts to stop warning with the method for short circuit transmission line, then behind the short circuit transmission line, when the positive half cycle of the alternating current that reducing transformer provides was sent, the d point was a high potential, the b point is a high potential, has back-pressure to fall on the R3, and promptly a point is an electronegative potential, and D1 oppositely ends, then T1 ends, the T2 conducting, and Y still reports to the police.When the alternating current negative half period was sent, T2 can end, but because the flip-flop transition of the positive and negative half cycle of alternating current is fast, with regard to people's the sense of hearing, above-mentioned chimes of doom can not interrupt.In this warning circuit, replace as the also available light-emitting diode of the buzzer Y of alarm indication element.Certainly, also can directly add light-emitting diode and become sound, light warning form.In addition, then available other element with resistance characteristic of voltage sampling element R3 replaces as likes such as bulb, resistance wires.Because the antennal interface 8 among the embodiment can insert 1～5 and 6～12 band antennas, so set up frequency mixer 7 between amplifying circuit 6 and antennal interface 8.The input of frequency mixer 7 links to each other with antennal interface 8, and the output of frequency mixer 7 links to each other with the input of amplifying circuit 6.
Claims (5)
1, a kind of Multi-Function Antenna amplifier, has reducing transformer, demultiplexer, rectifier filter, amplifying circuit, antennal interface and television set interface, it is characterized in that being provided with voltage sampling device and warning circuit, the voltage sampling device is arranged between the power input of the output of reducing transformer and demultiplexer, and the control end of warning circuit and voltage sampling device join.
2, amplifier as claimed in claim 1, it is characterized in that described warning circuit is by triode T1, T2, diode D1, D2, resistor R 1, R2, capacitor C1 and alarm indication element constitute, the positive pole of diode D1 connects an output of described reducing transformer and an end of described voltage sampling device, the negative pole of diode D1 links to each other with the end of capacitor C1 and an end of resistor R 1, the other end and the triode T1 of the described voltage sampling device of another termination of capacitor C1, the emitter of T2, the base stage of another termination triode T1 of resistor R 1, the collector electrode of triode T1 links to each other with the base stage of triode T2 and an end of resistor R 2, the other end of resistor R 2 links to each other with the negative pole of diode D2, the collector electrode of another termination triode T2 of alarm indication element, the positive pole of diode D2 connects another output of described reducing transformer.
3, amplifier as claimed in claim 1 is characterized in that described voltage sampling device is a resistor.
4, amplifier as claimed in claim 2 is characterized in that described alarm indication element is a buzzer.
5, as claim 1 or 2 or 3 or 4 described amplifiers, it is characterized in that being provided with frequency mixer between amplifying circuit and antennal interface, the input of frequency mixer links to each other with antennal interface, and the output of frequency mixer links to each other with the input of amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94236975 CN2202376Y (en) | 1994-08-12 | 1994-08-12 | Multi-functional antenna amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94236975 CN2202376Y (en) | 1994-08-12 | 1994-08-12 | Multi-functional antenna amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2202376Y true CN2202376Y (en) | 1995-06-28 |
Family
ID=33844816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94236975 Expired - Fee Related CN2202376Y (en) | 1994-08-12 | 1994-08-12 | Multi-functional antenna amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2202376Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104469330A (en) * | 2015-01-04 | 2015-03-25 | 安徽波维电子科技有限公司 | Antitheft device for outdoor unit of satellite television receiving system |
| CN104486601A (en) * | 2015-01-04 | 2015-04-01 | 安徽波维电子科技有限公司 | Anti-theft method of outdoor unit of satellite television receiving system |
-
1994
- 1994-08-12 CN CN 94236975 patent/CN2202376Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104469330A (en) * | 2015-01-04 | 2015-03-25 | 安徽波维电子科技有限公司 | Antitheft device for outdoor unit of satellite television receiving system |
| CN104486601A (en) * | 2015-01-04 | 2015-04-01 | 安徽波维电子科技有限公司 | Anti-theft method of outdoor unit of satellite television receiving system |
| CN104486601B (en) * | 2015-01-04 | 2017-06-30 | 安徽波维电子科技有限公司 | The outdoor unit theft preventing method of satellite television receiving system |
| CN104469330B (en) * | 2015-01-04 | 2017-09-12 | 安徽波维电子科技有限公司 | The outdoor unit anti-theft device of satellite television receiving system |
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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 |