KR19990055691A - Horizontal Deflection Feedback Signal Generator in Combined TV / Monitor - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal deflection feedback signal generator in a combined TV / monitor circuit. In particular, the present invention relates to a waveform detection unit (10) for detecting a waveform flowing through a coil, and a waveform detected by the waveform detection unit (10) as a feedback signal. Waveform shaping section 20 for converting the waveform to a waveform of a suitable size for use, a square wave generator 30 for converting the waveform output from the waveform shaping section 20 to a complete square wave and outputting, and the square wave generator ( 30, the buffer unit 40 which is buffered to reduce the interference of the waveform output from the waveform, and the waveform output from the buffer unit 40 is set as the waveform-sinused feedback signal of an appropriate size and the monitor horizontal deflection signal generation unit and And an output circuit unit 50 for simultaneously outputting the TV horizontal deflection signal generation unit, and the present invention provides a feedback signal having the same period as the horizontal plane of the TV and the monitor. By supplied to the signal generated at the same time, there is a difference in the TV to the circuit without the need to separate the synchronization period of the monitor short Hi configuration.

Description

Horizontal Deflection Feedback Signal Generator in Combined TV / Monitor

The present invention relates to an apparatus for generating a horizontal deflection feedback signal in a combined circuit of a TV / monitor, and in particular, generates a horizontal deflection feedback signal required for each deflection signal generating unit of a TV (TELEVISION) and a monitor. The present invention relates to a horizontal deflection feedback signal generator in a combination TV / monitor circuit for simultaneously supplying a horizontal deflection feedback signal to a TV horizontal deflection signal generator and a monitor horizontal deflection signal generator.

In general, a circuit for generating a conventional horizontal deflection feedback signal generates a feedback signal required for the TV horizontal deflection signal generation unit and the monitor horizontal deflection signal generation unit as a separate circuit, and is generated by the respective circuits. The feedback signal was operated by supplying different feedback signals to the TV horizontal deflection signal generator and the monitor horizontal deflection signal generator.

However, in the above case, the horizontal deflection feedback signals are generated in separate circuits to supply the respective feedback signals to the horizontal deflection signal generators of the TV and the monitor, thereby complicating the circuit configuration and thereby reducing productivity. There was a problem.

An object of the present invention is to solve the conventional problems as described above, in particular, if the waveform of the feedback signal detected from the coil to form a waveform suitable for use in the waveform shaping section, the square wave generating section outputs the shaped waveform to the square wave The present invention provides a horizontal deflection feedback signal generator in a combination TV / monitor circuit which simultaneously supplies a feedback signal waveform synchronized through a signal output stage of a circuit part to a monitor horizontal deflection signal generator and a TV horizontal deflection signal generator.

In order to achieve the above object, a horizontal deflection feedback signal generator in a TV / monitor combined circuit of the present invention includes a waveform detection unit for detecting a waveform flowing in a coil; A waveform shaping section connected to the signal output terminal of the waveform detecting section and converting the waveform detected by the waveform detecting section into a waveform having a suitable magnitude for use as a feedback signal; A square wave generator connected to the signal output terminal of the waveform shaping section, for converting the waveform output from the waveform shaping section into a perfect square wave and outputting the waveform; A buffer unit connected to the signal output terminal of the square wave generator and buffered to reduce interference of a waveform output from the square wave generator; An output circuit section connected to the signal output terminal of the buffer section and setting the waveform output from the buffer section to a waveform-sinused feedback signal of an appropriate size and simultaneously outputting the monitor horizontal deflection signal generating section and the TV horizontal deflection signal generating section; It is characterized by the technical configuration.

1 is a schematic circuit diagram of a horizontal deflection feedback signal generator in a TV / monitor combined circuit of the present invention;

FIG. 2 is a waveform diagram showing waveforms generated in a horizontal deflection feedback signal generator in a TV / monitor combined circuit of the present invention.

<Description of the symbols for the main parts of the drawings>

10: waveform detection unit 20: waveform shaping unit

21: first resistance 22: second resistance

30: square wave generator 31: the first transistor

32: third resistor 33: first capacitor

40: buffer portion 41: fourth resistor

42: fifth resistor 43: sixth resistor

44: second transistor 50: output circuit portion

51: first diode 52: seventh resistor

53: eighth resistance

Hereinafter, an embodiment according to the technical concept of the horizontal deflection feedback signal generator in the TV / monitor combined circuit of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

<Example>

As shown in FIG. 1, the waveform detector 10 detects a waveform flowing in the horizontal deflection coil and supplies the waveform to the waveform shaping unit 20, and the waveform shaping unit 20 supplies the waveform waveform from the waveform detector 10. The waveform is changed into a waveform having an appropriate size and supplied to the square wave generator 30. The square wave generator 30 makes the waveform supplied from the waveform shaping unit 20 into a square wave of a perfect shape and buffer unit 40. And the buffer unit 40 is operated to reduce interference of the square wave supplied from the square wave generator 30 to the output circuit unit 50, and the buffer unit 40 in the output circuit unit 50. This embodiment is configured to convert the square wave supplied from the wave form into a waveform suitable for the horizontal deflection signal generation unit of the monitor and the TV to be supplied and operated at the same time.

Hereinafter, the operation of the present embodiment configured as described above will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the waveform detector 10 detects a horizontal deflection feedback signal whose signal level flowing through the transformer coil is not constant, and supplies the same through the signal input terminal of the waveform shaping unit 20. Supplies a waveform as shown in (a) of FIG.

In addition, the signal level is constant in the first resistor 21 and the second resistor 22 of the waveform shaping unit 20 which receives the waveform as shown in FIG. 2 from the waveform detector 10. The non-waveform waveform is limited to have a signal level having an appropriate magnitude so that the signal level is limited to a waveform as shown in (b) of FIG. 2 so as to meet the input condition of the signal input terminal of the square wave generator 30.

In addition, the square wave generator 30 receives the waveform as shown in (b) of FIG. 2 from the waveform shaping unit 20 in the first transistor 31, the first capacitor 33 and the third resistor. A square wave signal is generated by (32), wherein the third resistor 32 is an output resistance of the first transistor 31, and the first capacitor 33 is a DC of the output waveforms of the first transistor 31. Since the voltage component is removed, the square wave generator 30 outputs the waveform of the square wave as shown in (c) of FIG. 2 to the signal input terminal of the buffer unit 40.

In addition, the buffer unit 40, which receives the waveform as shown in (c) of FIG. 2 from the square wave generating unit 30, has a fourth resistor 41, a fifth resistor 42, and a sixth resistor. By operating the resistor 43 and the second transistor 44, the square wave supplied from the square wave generator 30 is operated to be less affected by interference, and the fourth resistor 41 is operated by the second transistor 44. ) Is a base resistor for impedance matching, the fifth resistor 42 is a bias resistor of the second transistor 44, and the sixth resistor 43 is an output resistor of the second transistor 44.

In addition, in the output circuit unit 50 receiving the signal output from the buffer unit 40, the first diode 51 is a protection diode for preventing voltage backflow from the rear end, and the seventh resistor 52 and The eighth resistor 53 adjusts the square wave supplied through the second transistor 44 of the buffer unit 40 to a waveform-sinused feedback signal of an appropriate magnitude as shown in (d) of FIG. It operates by simultaneously supplying the waveform-shaped feedback signal to the deflection signal generator and the TV horizontal deflection signal generator.

As described above, the horizontal deflection feedback signal generator in the TV / monitor combination circuit of the present invention, in particular, by simultaneously supplying the feedback signal having the same period to the horizontal deflection signal generation unit of the TV and the monitor, the period of the TV and the monitor The effect is that the circuit can be configured concisely without the need for synchronization.

Claims (2)

A waveform detector for detecting a waveform flowing in the coil; A waveform shaping section connected to the signal output terminal of the waveform detecting section and converting the waveform detected by the waveform detecting section into a waveform having a suitable magnitude for use as a feedback signal; A square wave generator connected to the signal output terminal of the waveform shaping section, for converting the waveform output from the waveform shaping section into a perfect square wave and outputting the waveform; A buffer unit connected to the signal output terminal of the square wave generator and buffered to reduce interference of a waveform output from the square wave generator; An output circuit section connected to the signal output terminal of the buffer section and setting the waveform output from the buffer section to a waveform-sinused feedback signal of an appropriate size and simultaneously outputting the monitor horizontal deflection signal generating section and the TV horizontal deflection signal generating section; Horizontal deflection feedback signal generator in a combination TV / monitor characterized in that the configuration. 2. The waveform of claim 1, wherein the square wave generator comprises: a first transistor operated by receiving a waveform supplied from the waveform shaping unit; a third resistor serving as an output resistance of the first transistor; and a DC of an output waveform of the first transistor. A horizontal deflection feedback signal generator in a combination TV / monitor circuit comprising: a first capacitor for removing voltage components.