KR19990050515A - Satellite receiver output control circuit - Google Patents

Abstract

The present invention provides a satellite receiver output control circuit in which a satellite receiver output circuit is controlled so that a composite and RGB method and a wide and normal standard aspect ratio are selected. A first control unit connected to an eighth terminal of the connecting device to control a standard screen and a wide screen, and an eighth terminal of the connecting device to switch a signal of a television and a BC-R signal. A second control unit for controlling and a third control unit connected to the terminal 16 of the connection device for controlling the composite mode and the RGB mode by switching.

Description

Satellite receiver output control circuit

The present invention relates to a satellite receiver output control circuit, and more particularly, to a satellite receiver output control circuit for controlling the output of the scat, the European satellite receiver connection device.

Generally, in Europe, etc., a 21-pin connection device called Scart is used as a connection device of a satellite receiver to connect a peripheral device, that is, a satellite receiver and a receiver that is connected and output from the satellite receiver. do.

In addition, in Europe, the wide screen is used because the vertical ratio of the screen is 16: 9, not the general screen system in which the aspect ratio is 4: 3, and the RGB signals applied to compose the video signal and appear on the screen are synthesized. Since the RBG mode, in which the RGB signals are separated from each other and applied to the screen rather than the composite method, is used to form a clearer screen, a satellite receiver circuit capable of controlling this is required.

In the prior art, there is a problem that the receiver mode in which the aspect ratio is 4: 3 and the composite mode and the receiver mode in which the aspect ratio is 16: 9 and the RGB mode cannot be provided simultaneously.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, the main object of the invention, the satellite receiver output is controlled so that the composite and RGB system and the wide and normal standard aspect ratio is selected in the satellite receiver output circuit. To provide a control circuit.

1 is a satellite receiver output control circuit diagram according to the present invention;

2 is an operation truth table of FIG. 1.

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

10: connecting device 12: first control unit

14: second control unit 16: third control unit

A feature of the present invention for achieving the above object is a scat connection circuit of a satellite receiver, wherein the connection circuit is connected to an external device, and connected to the eighth terminal of the connection device to display a standard screen and a wide screen A first control unit for controlling, a second control unit connected to the 8th terminal of the connecting device to control the signal of the television and the V-Cal, and connected to the 16th terminal of the connecting device to switch the composite mode and the RGB mode. The third control part which controls by controlling is carried out.

Hereinafter, a preferred embodiment of the satellite receiver output control circuit according to the present invention according to the accompanying drawings will be described in detail.

1 is a diagram illustrating a satellite receiver output control circuit according to the present invention, and FIG. 2 is an operation truth table of FIG. 1.

In the satellite receiver output control circuit according to the present invention, in the scat connection circuit of the satellite receiver, the connection circuit is connected to the connection device 10 and the eighth terminal of the connection device 10 is connected to an external device, A first control unit 12 controlling a screen and a wide screen, a second control unit 14 connected to an eighth terminal of the connection device 10 to switch and control a television signal and a VCR signal; The third control unit 16 is connected to the terminal 16 of the connection device 10 to switch between the composite mode and the RGB mode.

The first control unit 12 is a first switch unit Q3 which is a NPN type bipolar transistor which is applied with a signal 1 for controlling a standard screen and a wide screen as a base, and the emitter is grounded, and is output from the collector. The output of the switch unit Q3 is applied to the base via the fifth resistor R5, the power supply V is applied to the emitter through the third resistor R3, and the collector output is applied to the first diode D1. It consists of the 2nd switch part Q4 which is a PNP type bipolar transistor through.

The second control unit 14 is a third switch unit Q5, which is an NPN type bipolar transistor output from the collector and the signal of the television and V-alarm signal 3 is grounded, and the collector and the third switch unit. The fourth switch, which is a PNP type bipolar transistor, whose output of Q5 is applied to the base through the sixth resistor R6, the power supply V is applied to the emitter, and the collector output is through the second diode D2. It consists of part Q6.

The third control unit 16 is a NPN-type bipolar transistor which is supplied with a signal for switching the composite mode and the RGB mode to the base, and the emitter is grounded, and is output to the collector. The output of Q1) is applied to the base via the first resistor R1, the power source V distributed by the second resistor R2 and the fourth resistor R4 is applied to the emitter, and the collector receives a third It consists of a 6th switch part Q2 output through the diode D3.

The following describes the operating state of the present invention configured as described above.

When the output of terminal 8 of the connecting device 10 is about 2 volts or less, it is controlled to the standard screen. When it is about 4.5 to 7 volts, it is in the wide mode, and when it is about 9.5 volts to 12 volts, the TV / VR mode It becomes

In addition, when the output of terminal 16 of the connecting device 10 is 0.4 volts or less, the composite mode is set, and when it is 1 to 3 volts, it is controlled to the RGB mode.

Accordingly, the first control unit 12 to which the signal 1 for controlling the standard screen and the wide screen is applied as a base is turned on by the second switch unit Q4 by switching the first switch unit Q3 to be turned on and off. Is switched, and accordingly, the power supply V is applied to the emitter and the output from the second switch section Q4 outputted to the eighth terminal of the connecting device 10 through the first diode D1 is adjusted. Will be.

Then, the second control unit 14, to which the signal of the television and the VR signal 3 are applied as the base, is applied to the emitter by switching the fourth switch unit Q6 by switching the third switch unit Q5. The power V being controlled is controlled so that the output from the fourth switch unit Q6 outputted to the eighth terminal of the connecting device 10 through the second diode D2 is adjusted.

In addition, the third controller 16 to which a signal for switching between the composite mode and the RGB mode is applied to the base is controlled by the second resistor R2 and the fourth resistor R4 by the switching of the fifth switch unit Q1. The distributed power source V switches the sixth switch unit Q2 applied to the emitter, and the collector output is operated to be output to the 16th terminal of the connecting device 10 through the third diode D3.

The satellite receiver output control circuit according to the present invention is operated so that the satellite receiver operates in each mode as shown in the operation truth table of FIG. 2 by switching each switch unit as described above.

As described in detail above, the satellite receiver output control circuit according to the present invention is provided with a satellite and a circuit control circuit for controlling the composite and RGB system and the wide and normal standard aspect ratios. Since the operation of the product has the effect of improving the competitiveness.

The present invention is not limited to the above embodiments, and it is apparent that many modifications are possible by those skilled in the art within the technical spirit of the present invention.

Claims (4)

A scat connection circuit of a satellite receiver, comprising: a connection device to which the connection circuit is connected to an external device; A first control unit connected to an eighth terminal of the connection device to control a standard screen and a wide screen; A second control unit connected to an eighth terminal of the connection device to control a signal of a television and a signal of a television; And a third control unit connected to the 16th terminal of the connection device to control the composite mode and the RGB mode by switching between the composite mode and the RGB mode. The first control unit includes a first switch unit to which a signal for controlling a standard screen and a wide screen is applied as a base, and the emitter is grounded and output from the collector; And the output of the first switch unit is applied to the base through the fifth resistor, the power is applied to the emitter through the third resistor, and the collector output comprises a second switch unit through the first diode. Satellite receiver output control circuit. The second control unit may include a third switch unit to which a signal of a television and a BC signal are applied as a base, and the emitter is grounded and output from the collector; And the output of the third switch unit is applied to the base through the sixth resistor, the power is applied to the emitter, and the collector output is composed of a fourth switch unit through the second diode. . The third control unit may include a fifth switch unit to which a signal for switching between the composite mode and the RGB mode is applied as a base, and the emitter is grounded and output to the collector; The output of the fifth switch unit is applied to the base through the first resistor, and the power distributed by the second and fourth resistors is applied to the emitter, and is output from the collector to the sixth switch unit through the third diode. Satellite receiver output control circuit, characterized in that the configuration.