CN203014993U - Switching circuit controlling power source of television signal receiving circuit - Google Patents
Switching circuit controlling power source of television signal receiving circuit Download PDFInfo
- Publication number
- CN203014993U CN203014993U CN 201220634634 CN201220634634U CN203014993U CN 203014993 U CN203014993 U CN 203014993U CN 201220634634 CN201220634634 CN 201220634634 CN 201220634634 U CN201220634634 U CN 201220634634U CN 203014993 U CN203014993 U CN 203014993U
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- Prior art keywords
- signal receiving
- television signal
- module
- connects
- receiving circuit
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Abstract
The utility model discloses a switching circuit controlling a power source of a television signal receiving circuit. The switching circuit controlling the power source of the television signal receiving circuit is provided with a television signal receiving module connected with an antenna for receiving television signals. The switching circuit controlling the power source of the television signal receiving circuit also includes a switch module provided with a control terminal connected with external control instructions, an input terminal connected with the power source and an output terminal for outputting power and used for connecting or disconnecting with the power source according to the control instructions; a voltage converting module provided with an input terminal connected with an output terminal of the switch module and an output terminal connected with the television signal receiving module and used for converting voltage of the power source to voltage required by the television signal receiving module. Compared with prior art, the switching circuit is connected between the power source and the television signal receiving circuit in series according to the utility model. When a television channel is selected, the television signal receiving circuit is switched on. When a non-television channel is selected, power supply of the television signal receiving circuit is cut off. Therefore, electric energy is saved and the service lifetime of the television signal receiving circuit is prolonged.
Description
Technical field
The utility model relates to switching circuit, relates in particular to a kind of switching circuit of controlling the TV signal receiving circuit power supply.
Background technology
Television set is a kind of very universal household electrical appliance, and almost the every household has.Along with the develop rapidly of electronic technology, the function of television set also from strength to strength.Except watching basic TV signal, can also switch to video channel, component channel, HDMI passage and computer passage etc.But what input channel existing television set no matter be operated under, and TV signal receiving circuit is all switched on, and is in normal operating conditions.During the TV signal receiving circuit normal operation, the power of consumption is 1.5W.But television set is in family uses, and be not operated in television channel the service time of the overwhelming majority, has so just wasted the electric flux that supplies of 1.5W, and does not meet the requirement of environmental protection.
The utility model content
The utility model is the problems referred to above that will solve prior art, proposes a kind of switching circuit, when selecting television channel, switches on to TV signal receiving circuit; When selecting non-television channel, stop powering to TV signal receiving circuit.
For solving the problems of the technologies described above, the technical scheme that the utility model proposes is a kind of switching circuit of controlling the TV signal receiving circuit power supply of design, have and connect antenna with the television signal receiver module of received television signal, it also comprises: switch module, its control command, input of controlling the termination outside connects power supply, output output electric energy, and controlled instruction is switched on or switched off power supply; The voltage transformation module, the output of its input connecting valve module, output connecting TV signal receiving module are the television signal receiver module required voltage in order to the voltage transformation with described power supply.
Described switch module comprises: triode and field effect transistor, and wherein transistor base connects the control end of switch module, grounded emitter, collector electrode is by the 5th resistance of series connection, the input that the 4th resistance connects switch module; Fet gate connects the tie point of the 5th resistance, the 4th resistance, and source electrode connects the input of switch module, and drain electrode connects the output of switch module, connects the first electric capacity between source electrode and grid.
Compared with prior art, the utility model is connected in series a switching circuit between power supply and TV signal receiving circuit, when selecting television channel, switches on to TV signal receiving circuit; When selecting non-television channel, stop powering to TV signal receiving circuit.Save by this electric energy, extended the useful life of TV signal receiving circuit.
Description of drawings
Below in conjunction with drawings and Examples, the utility model is made detailed explanation, wherein:
Fig. 1 is the theory diagram of the utility model preferred embodiment;
Fig. 2 is the circuit diagram of the utility model preferred embodiment.
Embodiment
The utility model has disclosed a kind of switching circuit of controlling the TV signal receiving circuit power supply, referring to Fig. 1, switching circuit has switch module, television signal receiver module, voltage transformation module, wherein: switch module, its control command, input of controlling the termination outside connects power supply, output output electric energy, and controlled instruction is switched on or switched off power supply; The voltage transformation module, the output of its input connecting valve module, output connecting TV signal receiving module are the television signal receiver module required voltage in order to the voltage transformation with described power supply; Television signal receiver module connects antenna, with received television signal.
Referring to the circuit diagram shown in Fig. 2, switch module comprises: triode Q32 and field effect transistor NQ4, wherein transistor base connects the control end of switch module, grounded emitter, and collector electrode is by the 5th resistance R 405 of series connection, the input that the 4th resistance R 403 connects switch module; Fet gate connects the tie point of the 5th resistance, the 4th resistance, and source electrode connects the input of switch module, and drain electrode connects the output of switch module, connects the first capacitor C 331 between source electrode and grid.
Below in conjunction with circuit diagram explanation operation principle of the present utility model, control command is produced by the GPIO control pin of television set master chip.The user is by the button selective channel on remote controller or panel.When selecting television channel, master chip SW control command is high level; When selecting non-television channel (as video channel, component channel, HDMI passage and computer passage etc.), master chip SW control command is low level.When SW is high level, the triode saturation conduction, the grid of field effect transistor becomes low level by high level, the field effect transistor conducting, the 5V power supply is powered to voltage transformation module UT2 through field effect transistor.When SW is low level, the triode cut-off, the grid of field effect transistor becomes high level by low level, the field effect transistor cut-off.The 5V power supply stops powering to voltage transformation module UT2.During the conducting of being on the scene effect pipe, voltage transformation module UT2 is transformed into the 3.3V direct current with the 5V direct current, and television signal receiver module (UT26 tuner receiving chip) gets electric, the TV signal in reception antenna, and by exporting in 8, No. 9 pins.
Above embodiment is only for illustrating, non-providing constraints.Anyly do not break away from the application's spirit and category, and to its equivalent modifications of carrying out or change, all should be contained among the application's claim scope.
Claims (2)
1. a switching circuit of controlling the TV signal receiving circuit power supply, have the connection antenna with the television signal receiver module of received television signal, it is characterized in that, also comprises:
Switch module, its control command, input of controlling the termination outside connects power supply, output output electric energy, and controlled instruction is switched on or switched off power supply;
The voltage transformation module, the output of its input connecting valve module, output connecting TV signal receiving module are the television signal receiver module required voltage in order to the voltage transformation with described power supply.
2. the switching circuit of control TV signal receiving circuit power supply as claimed in claim 1, is characterized in that, described switch module comprises: triode (Q32) and field effect transistor (NQ4), wherein
Transistor base connects the control end of switch module, grounded emitter, and collector electrode is by the 5th resistance (R405) of series connection, the input that the 4th resistance (R403) connects switch module;
Fet gate connects the tie point of the 5th resistance, the 4th resistance, and source electrode connects the input of switch module, and drain electrode connects the output of switch module, connects the first electric capacity (C331) between source electrode and grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634634 CN203014993U (en) | 2012-11-27 | 2012-11-27 | Switching circuit controlling power source of television signal receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634634 CN203014993U (en) | 2012-11-27 | 2012-11-27 | Switching circuit controlling power source of television signal receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203014993U true CN203014993U (en) | 2013-06-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220634634 Expired - Fee Related CN203014993U (en) | 2012-11-27 | 2012-11-27 | Switching circuit controlling power source of television signal receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203014993U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202028A (en) * | 2014-08-19 | 2014-12-10 | 浙江大学 | Safety switch for small aircraft |
-
2012
- 2012-11-27 CN CN 201220634634 patent/CN203014993U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202028A (en) * | 2014-08-19 | 2014-12-10 | 浙江大学 | Safety switch for small aircraft |
| CN104202028B (en) * | 2014-08-19 | 2017-04-12 | 浙江大学 | Safety switch for small aircraft |
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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: 20130619 Termination date: 20211127 |