CN2037127U

CN2037127U - Signal converging device for tv set

Info

Publication number: CN2037127U
Application number: CN 88209752
Authority: CN
Inventors: 郝明; 孔波
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-08-15
Filing date: 1988-08-15
Publication date: 1989-05-03

Abstract

The utility model discloses a signal converging device for a TV set which is particularly suitable for various televisions. The signal converging device for the TV set can transmit multi-circuit signals (such as a TV signal and a recording signal) to TV through a converging branch and a matching branch without interference, and the multi-circuit signals which are supplied to the TV set can be selectively watched.

Description

Signal converging device for TV set

Be specially adapted to all kinds television receiver and watch the device of multiple signal source.

This technical field is used hand switch changeover signal source aspect the input of television set multiple signals, as: television signal selector ANS-30(plane No. 1-552, the 443-12 of Sony corporation of Japan outlet).

And most of television receivers of China are when watching the unlike signal source, with the method changeover signal source of hand plug TV set aerial plug.

It is very inconvenient that said method uses, and especially need frequently switch complex operation not only, but also perversion signal source easily in multiple signal source.Often plug the TV set aerial plug, can the very fast antenna socket that damages television set.

The utility model purpose is that a kind of cost of design is low, volume is little, need operate, and can freely select the device of seeing the unlike signal source on television set.

This device by: converge branch road, coupling branch road two is partly formed.See Fig. 1

Converge branch road by: building-out capacitor C1, C2, transformer T1, isolation resistance R form, and its function is with the signal of different inputs, merges together without interfering with each other, sends into the coupling branch road.

The coupling branch road by: transformer T2, building-out capacitor C3, C4 form, and its function is to make output impedance and television set input impedance matching, guarantee signal output amplitude maximum, reflect minimum.

Building-out capacitor C1, C2, C3, C4 can reduce the high-frequency loss of this device, adjust C3 and can change compensating frequency.

Fig. 1 is that the television set two paths of signals converges the device design example.

Resistance R is selected 150 Ω for use, and T1 selects single hole magnet ring and enamelled wire coiled for use, and T2 selects diplopore magnet ring and enamelled wire coiled for use, and building-out capacitor C1, C2, C4 select the 2-10PF capacitor for use, and C3 selects the 2-25PF variable capacitor for use.

Example: the various signal sources that will need before using are sent into this device with connecting line, this device are linked to each other with the TV set aerial jack again, and give the frequency of selecting each signal source with television set tuner, so just can select arbitrarily on television set and see required programs.

This device can be made single product, also can be directly installed in the television set.Preferably be installed near the television set, can use for a long time after the installation, need not adjust and keep in repair.

Two paths of signals converges the basic design circuit that device is this device, if change T1, T2 parameter, can constitute the series of products that difference is converged way.

This device has following characteristics:

1, circuit is simple, cost is low, not power consumption, safe and reliable.

2, bandwidth, applied widely, select signal rapidly convenient.

3, adopt passive network, long service life.

The utility model drawings attached 1 television set two paths of signals converges schematic diagram of device.

Among the figure:

CZ1, CZ2, CZ3 are the high frequency cable socket.

R is an isolation resistance.

T1, T2 are transformer.

C1, C2, C3, C4 are compensation condenser.

Claims

1, a kind of television signal converges device, comprises the television signal selector that uses toggle switch, feature of the present utility model be by: converge branch road, coupling branch road, two partly form; The transformer T1 contact 2 that converges branch road through building-out capacitor C3, is connected with the transformer T2 contact 2 of coupling branch road.

2, the television signal according to claim 1 converges device, it is characterized in that: converge route isolation resistance R, a transformer T1, building-out capacitor C1, C2 composition.

3, the television signal according to claim 1 converges device, it is characterized in that: a coupling route transformer T2, building-out capacitor C3, C4 form.