CN2517202Y - Suply unit of all-channel TV receiving antenna amplifier - Google Patents

Suply unit of all-channel TV receiving antenna amplifier Download PDF

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Publication number
CN2517202Y
CN2517202Y CN02202532U CN02202532U CN2517202Y CN 2517202 Y CN2517202 Y CN 2517202Y CN 02202532 U CN02202532 U CN 02202532U CN 02202532 U CN02202532 U CN 02202532U CN 2517202 Y CN2517202 Y CN 2517202Y
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CN
China
Prior art keywords
circuit
transformer
led
antenna amplifier
current foldback
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
Application number
CN02202532U
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Chinese (zh)
Inventor
刘凤海
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Individual
Original Assignee
Individual
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Filing date
Publication date
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Priority to CN02202532U priority Critical patent/CN2517202Y/en
Application granted granted Critical
Publication of CN2517202Y publication Critical patent/CN2517202Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a power supply unit for a receiving antenna amplifier of a full-channel television, comprising a transformer, an overcurrent protection circuit, a coupled circuit and a video signal distributor. The transformer and the overcurrent protection circuit are arranged in a housing and form an inline structure; the coupled circuit and the video signal distributor are arranged in another housing and are inserted into the interface of the television antenna, reducing the feeder loss. The utility model has the advantages of simple structure, low cost, the function of short circuit and the overcurrent protection and little feeder loss.

Description

Full channel tv receiving antenna amplifier power supply device
Technical field
The utility model relates to a kind of full channel tv receiving antenna amplifier power supply device.
Background technology
(number of patent application: 01233455.3), it is made up of transformer, coupling circuit, DC power supply circuit, TV turning on-off monitoring circuit, overvoltage crowbar, driving executive circuit, relay normally open contact, TV set power socket by " the full channel tv receiving antenna amplifier circuit device " of the applicant application; The TV turning on-off monitoring circuit is made up of sample circuit, comparator and voltage follower, and overvoltage crowbar is made up of voltage sampling circuit, comparator and voltage follower.Above-mentioned patent application has over-voltage protecting function, and can cut off the power supply of antenna amplifier antennafire according to television set switch situation.Its shortcoming is a complex structure, and cost is higher.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of full channel tv receiving antenna amplifier power supply device simple in structure, lower-cost.
The technical scheme that its technical problem that solves the utility model adopts is: it is made up of transformer and current foldback circuit, coupling circuit and video distributor, and transformer and current foldback circuit are by transformer T 1, resistance R 1, R 2, LED 1, LED 2Form T 1Elementary connecing～220V, R 1With LED 1Be composed in series behind the display circuit again and T 1Secondary parallel connection, R 2With LED 2Compose in parallel after the protective circuit again and T 1Secondary series connection, the output of transformer and current foldback circuit is AB, coupling circuit and video distributor are by resistance R 4, R 5, capacitor C 1, C 2, choke L, video plug CH 1-CH 3Form the trap capacitor C 1Be connected in parallel on the output terminals A B of transformer and current foldback circuit, the termination output terminals A of choke L, its other end is connected to the CH of antenna amplifier antennafire 1, be connected to the CH of television set 2, CH 3Respectively through R 4, R 5Meet coupling capacitance C 2Same end, C 2Another termination L and CH 1The node place.
The beneficial effects of the utility model be simple in structure, cost is lower, and has short circuit and overcurrent protection function, in addition and since its adopt video distributor directly with the grafting of TV set aerial interface, reduced feeder loss.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
By embodiment shown in Figure 1 as can be known, it is made up of transformer and current foldback circuit, coupling circuit and video distributor, and transformer and current foldback circuit are by transformer T 1, resistance R 1, R 2, LED 1, LED 2Form T 1Elementary connecing～220V, R 1With LED 1Be composed in series behind the display circuit again and T 1Secondary parallel connection, R 2With LED 2Compose in parallel after the protective circuit again and T 1Secondary series connection, the output of transformer and current foldback circuit is AB, coupling circuit and video distributor are by resistance R 4, R 5, capacitor C 1, C 2, choke L, video plug CH 1-CH 3Form the trap capacitor C 1Be connected in parallel on the output terminals A B of transformer and current foldback circuit, the termination output terminals A of choke L, its other end is connected to the CH of antenna amplifier antennafire 1, be connected to the CH of television set 2, CH 3Respectively through R 4, R 5Meet coupling capacitance C 2Same end, C 2Another termination L and CH 1The node place.
Coupling circuit and video distributor also include by resistance R 3With LED 3The display circuit of forming, R 1With LED 3Series connection back and C 1In parallel.
Transformer and current foldback circuit are contained in and constitute direct insertion structure in the housing, and coupling circuit and video distributor are contained in another housing, and direct and TV set aerial interface is pegged graft.
Operation principle of the present utility model is as follows:
Alternating current 220V is through T 1Transformation is for exchanging 12V, LED 1Be power supply indicator, LED 2Be the short circuit indicator light, when load is short-circuited, through R 2Electric current increase R 2The pressure drop of last generation makes LED 2Bright.C 1Effect be to filter high-frequency signal.LED 3Be power supply indicator ,～12V power supply is through choke L and CH 1To the antenna amplifier antennafire power supply, TV signal is through C 2Be coupled to CH 2, CH 2, CH 2, CH 3Be connected to two television sets respectively, R 4, R 5Effect be to prevent phase mutual interference between two TVs.
The user when fixing up an aerial wire, if when plug or feeder line are short-circuited LED 2Bright, the user just as can be known setup error fix a breakdown.

Claims (3)

1, a kind of full channel tv receiving antenna amplifier power supply device is characterized in that it is made up of transformer and current foldback circuit, coupling circuit and video distributor, and transformer and current foldback circuit are by transformer T 1, resistance R 1, R 2, LED 1, LED 2Form T 1Elementary connecing～220V, R 1With LED 1Be composed in series behind the display circuit again and T 1Secondary parallel connection, R 2With LED 2Compose in parallel after the protective circuit again and T 1Secondary series connection, the output of transformer and current foldback circuit is AB, coupling circuit and video distributor are by resistance R 4, R 5, capacitor C 1, C 2, choke L, video plug CH 1-CH 3Form the trap capacitor C 1Be connected in parallel on the output terminals A B of transformer and current foldback circuit, the termination output terminals A of choke L, its other end is connected to the CH of antenna amplifier antennafire 1, be connected to the CH of television set 2, CH 3Respectively through R 4, R 5Meet coupling capacitance C 2Same end, C 2Another termination L and CH 1The node place.
2, full channel tv receiving antenna amplifier power supply device according to claim 1 is characterized in that coupling circuit and video distributor also include by resistance R 3With LED 3The display circuit of forming, R 1With LED 3Series connection back and C 1In parallel.
3, full channel tv receiving antenna amplifier power supply device according to claim 2; it is characterized in that transformer and current foldback circuit are contained in the direct insertion structure of formation in the housing; and coupling circuit and video distributor are contained in another housing, and direct and TV set aerial interface is pegged graft.
CN02202532U 2002-01-25 2002-01-25 Suply unit of all-channel TV receiving antenna amplifier Expired - Fee Related CN2517202Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN02202532U CN2517202Y (en) 2002-01-25 2002-01-25 Suply unit of all-channel TV receiving antenna amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN02202532U CN2517202Y (en) 2002-01-25 2002-01-25 Suply unit of all-channel TV receiving antenna amplifier

Publications (1)

Publication Number Publication Date
CN2517202Y true CN2517202Y (en) 2002-10-16

Family

ID=33685044

Family Applications (1)

Application Number Title Priority Date Filing Date
CN02202532U Expired - Fee Related CN2517202Y (en) 2002-01-25 2002-01-25 Suply unit of all-channel TV receiving antenna amplifier

Country Status (1)

Country Link
CN (1) CN2517202Y (en)

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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