| 摘要 |
The invention provides a device that selects the input image signal out of image signals of a TV set, VCR and an external apparatus in the TV with VCR. The device includes two ICs for switches Nos. 1 and 2, muting circuits 4 and 5, inverters 8, image signal insulation section 12, LED drive 17 and photocoupler 18. The ICs operate the internal switches according to the low or high voltage applied to respective control terminals T0, T1 and L0, L1. The image signal insulation 12 insulates to perform amplification and DC clamping in compliance with the input image signals. |
