| 摘要 |
The circuit embodies common use of audio circuit accepting both PAL(Phase Alternating by line) method and NTSC(National Television System Committee) method on multi VCR system. It includes a first diode(3) serially connected with LP line, a first endgate(1) having input terminals from SP and PAL and output terminal to the first diode(3), the second diode(4) serially connected with SLP, and a second endgate(2) having input terminals from LP and PAL and output terminal to the second diode(4). Above two endgates(1)(2) are logical product processors. Each endgate contains three transistors and one of the three transistors is common.
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