CN203399127U - Light receiving equipment of network management control type - Google Patents
Light receiving equipment of network management control type Download PDFInfo
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- CN203399127U CN203399127U CN201320431856.5U CN201320431856U CN203399127U CN 203399127 U CN203399127 U CN 203399127U CN 201320431856 U CN201320431856 U CN 201320431856U CN 203399127 U CN203399127 U CN 203399127U
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- circuit
- converter circuit
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Abstract
The utility model discloses light receiving equipment of a network management control type, and the equipment comprises a DC-DC converter circuit, and a micro-control unit. The DC-DC converter circuit is provided with an RF on-off control circuit which is connected with the micro-control unit. The RF on-off control circuit consists of a resistor R3 and a triode D2. The micro-control unit enables the output end of the DC-DC converter circuit to have no voltage through controlling the enabling level of the EN of the DC-DC converter circuit, so as to enable the enabling port of the DC-DC converter circuit to directly cut off the working power supply of a first signal amplifier, a second signal amplifier, and a third signal amplifier, thereby shutting off the radio frequency output level of a main signal channel. Compared with the prior art, the isolation of the equipment is better in effect in the whole control process, and the cost of electricity consumption is effectively saved.
Description
Technical field
The utility model relates to CATV cable TV optical transmission device field, is specifically related to control the network management control type optical receiving device of radio frequency output level.
Background technology
For controlling radio frequency output level, a lot of optical receiving devices have increased remote radio frequency switching function, and common mode is at present, adopt relay or radio-frequency (RF) switch pipe to control the radio frequency output signal of main path signal.Because the isolation of relay and radio-frequency (RF) switch pipe is conventionally at the optical receiving device of 50dB high-power output, its fan-out capability is strong, also can pass through relay or radio-frequency (RF) switch pipe coupling unit signal, and it is not very desirable making effect.
Utility model content
For above-mentioned deficiency of the prior art, the network management control type optical receiving device that the utility model provides has solved the poor problem of signal isolation effect while controlling radio frequency output level.
In order to reach foregoing invention object, the technical scheme of the network management control type optical receiving device that the utility model provides is: comprise DC-DC converter circuit, micro-control unit, and the first signal amplifier being connected with DC-DC converter circuit respectively, secondary signal amplifier and the 3rd signal amplifier; On described DC-DC converter circuit, be provided with the RF radio-frequency (RF) switch control circuit being connected with micro-control unit, described RF radio-frequency (RF) switch control circuit is comprised of resistance R 3 and triode D2; Resistance R 3 inputs are connected with micro-control unit, and its output is connected with the base stage of triode D2; The emitter of triode D2 is connected with DC-DC converter circuit builtin voltage regulating circuit; The collector electrode of triode D2 is connected with DC-DC converter circuit internal delay time circuit.
Preferably, described resistance R 3 is current-limiting resistance.
Preferably, described voltage regulator circuit is comprised of the resistance R 4 being cascaded and resistance R 5.
Preferably, described delay circuit is comprised of resistance R 2 and capacitor C 4.
The beneficial effects of the utility model are: micro-control unit controls is controlled the triode D2 base stage level of RF radio-frequency (RF) switch control circuit, the base stage that makes triode D2 is high voltage, triode D2 emitter and collector is in empty short status, it is low level that the EN of DC-DC converter circuit enables pin, the output output no-voltage of DC-DC converter circuit now, so that the output port of DC-DC converter circuit directly turn-offs first signal amplifier, the working power of secondary signal amplifier and the 3rd signal amplifier reaches the object of turn-offing main signal radio frequency output signal, in whole control procedure, its isolation compared with prior art effect is better, and electrical energy saving cost effectively.
Accompanying drawing explanation
Fig. 1 is the theory diagram of network management control type optical receiving device;
Fig. 2 is the circuit diagram of DC-DC converter circuit.
Wherein, the 1, first filter circuit; 2, delay circuit; 3, RF radio-frequency (RF) switch control circuit; 4, voltage-regulating circuit; 5, the second filter circuit.
Embodiment
As shown in Figure 1, this network management control type optical receiving device comprises DC-DC converter circuit, micro-control unit and the optical-electrical converter being connected in turn, first signal amplifier, the first voltage-controlled attenuator, secondary signal amplifier, the second voltage-controlled attenuator and the 3rd signal amplifier, described micro-control unit is connected with DC-DC converter circuit, the first voltage-controlled attenuator and the second voltage-controlled attenuator respectively, and described DC-DC converter circuit is connected with first signal amplifier, secondary signal amplifier and the 3rd signal amplifier respectively.
The DC-DC converter circuit of prior art comprises the compositions such as the first filter circuit 1, delay circuit 2, voltage-regulating circuit 4, the second filter circuit 5, capacitor C 5, Adjustable Diode D1, capacitor C 3, resistance R 1, capacitor C 2 and inductance L 1.
As shown in Figure 2, be provided with the RF radio-frequency (RF) switch control circuit 3 being connected with micro-control unit on described DC-DC converter circuit, described RF radio-frequency (RF) switch control circuit 3 is comprised of resistance R 3 and triode D2; Resistance R 3 inputs are connected with micro-control unit, and its output is connected with the base stage of triode D2; The emitter of triode D2 is connected with DC-DC converter circuit builtin voltage regulating circuit 4; The collector electrode of triode D2 is connected with DC-DC converter circuit internal delay time circuit 2; Described resistance R 3 is current-limiting resistance; Described voltage regulator circuit 4 is comprised of the resistance R 4 being cascaded and resistance R 5; Described delay circuit 2 is comprised of resistance R 2 and capacitor C 4.
The first filter circuit 1 is comprised of capacitor C 1, and the second filter circuit 5 is formed in parallel by capacitor C 6 and capacitor C 7.
When wherein the base stage of the triode D2 of DC-DC converter circuit is high voltage, triode D2 emitter and collector is in empty short status, it is low level that the EN of DC-DC converter circuit enables pin, the now output of DC-DC converter circuit conversion output no-voltage; When the base stage of triode D2 is low level, triode D2(PNP) emitter and collector is in the disconnected state of void, and it is high level that the EN of DC-DC converter circuit enables pin, the normal voltage that now the output output of DC-DC converter circuit is set.
Although by reference to the accompanying drawings embodiment of the present utility model is described in detail, should not be construed as the restriction to the protection range of this patent.In the described scope of claims, the various modifications that those skilled in the art can make without creative work and distortion still belong to the protection range of this patent.
Claims (4)
1. a network management control type optical receiving device, comprises DC-DC converter circuit, micro-control unit, and the first signal amplifier being connected with DC-DC converter circuit respectively, secondary signal amplifier and the 3rd signal amplifier; It is characterized in that: on described DC-DC converter circuit, be provided with the RF radio-frequency (RF) switch control circuit being connected with micro-control unit, described RF radio-frequency (RF) switch control circuit is comprised of resistance R 3 and triode D2; Resistance R 3 inputs are connected with micro-control unit, and its output is connected with the base stage of triode D2; The emitter of triode D2 is connected with DC-DC converter circuit builtin voltage regulating circuit; The collector electrode of triode D2 is connected with DC-DC converter circuit internal delay time circuit.
2. network management control type optical receiving device according to claim 1, is characterized in that: described resistance R 3 is current-limiting resistance.
3. network management control type optical receiving device according to claim 1 and 2, is characterized in that: described voltage regulator circuit is comprised of the resistance R 4 being cascaded and resistance R 5.
4. network management control type optical receiving device according to claim 1 and 2, is characterized in that: described delay circuit is comprised of resistance R 2 and capacitor C 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320431856.5U CN203399127U (en) | 2013-07-19 | 2013-07-19 | Light receiving equipment of network management control type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320431856.5U CN203399127U (en) | 2013-07-19 | 2013-07-19 | Light receiving equipment of network management control type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203399127U true CN203399127U (en) | 2014-01-15 |
Family
ID=49910623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320431856.5U Expired - Fee Related CN203399127U (en) | 2013-07-19 | 2013-07-19 | Light receiving equipment of network management control type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203399127U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262548A (en) * | 2015-10-20 | 2016-01-20 | 中国电子科技集团公司第四十四研究所 | Light receiving circuit |
-
2013
- 2013-07-19 CN CN201320431856.5U patent/CN203399127U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262548A (en) * | 2015-10-20 | 2016-01-20 | 中国电子科技集团公司第四十四研究所 | Light receiving circuit |
| CN105262548B (en) * | 2015-10-20 | 2017-09-22 | 中国电子科技集团公司第四十四研究所 | Optical receiving circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20210719 |