| 摘要 |
<p>PURPOSE: To attain the reservation of picture recording even with a tunerless VCR and to allow the power source of a TV image receiver to be automatically turned on at the time of reproducing, by adding a simple signal processing circuit to a video line output terminal of VCR and a video line input terminal of the TV. CONSTITUTION: At a picture recording time, a microprocessor 50 of a VCR 200 outputs a high level of a signal, which is inputted to a voltage converter 40 and is applied to a video line input terminal 101 of a TV 100 through a video line output terminal 201 and a line connector. A transistor 24 is operated via a diode 23 of a power source switching part 20, and a transistor 34 of a constant voltage circuit 30 is also operated. As a result, an AC power source 106 is applied to a rectifier diode 31 and Darlington transistor 35, and a DC constant voltage is outputted 107 for a TV power source. When the TV is thus turned on, a video signal is outputted and inputted to the video input terminal 202 of the VCR 200 to start picture recording.</p> |
