| 摘要 |
PURPOSE: To reduce the number of ports when a part or all of circuit is made into IC without the necessity of provision of a reference level signal in the case of using a comparator by slicing a video signal set to a different level with an inverter circuit. CONSTITUTION: A luminance signal Y received from a terminal S1 is given to an analog switch 36 at first, clamped according to a pedestal clamp circuit and a level of a video signal is switched into plural levels by resistors R7 -R12 . Thus, each video signal whose level is switched in this way is given to inverter circuits 40-46 whose characteristics are identical to each other and sliced at a prescribed level. Thus, each video signal is sliced by a different level and the result is outputted as a high level signal or a low level signal from the respective inverter circuits 40-46. |
