TELEVISION SIGNAL PROCESSING CIRCUIT
PURPOSE:To derive a prescribed test signal to a chrominance signal output terminal and to test the motion of a processing circuit in a condition without a TV signal by processing the signal of a selfoscillating circuit by means of a logical circuit. CONSTITUTION:When a color difference signal and a...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | PURPOSE:To derive a prescribed test signal to a chrominance signal output terminal and to test the motion of a processing circuit in a condition without a TV signal by processing the signal of a selfoscillating circuit by means of a logical circuit. CONSTITUTION:When a color difference signal and a video signal are not applied from the outside, by respectively connecting switches 14 to 16 to an (X) side, a prescribed waveform output is obtained from a logical circuit 11 in a horizontally deflecting automatic frequency control system 18. Thus, respective R, G and B test signals can be derived from chrominance signal output terminals 1, 2 and 3. |
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