| 摘要 |
<p>PURPOSE:To obtain a control circuit operated by plural DC voltages by providing plural voltage latch circuits, a D/A converter circuit and a control signal transmission line. CONSTITUTION:The television receiver is provided with plural voltage latch circuits 3-5, a D/A converter circuit 7 and a control signal transmission line. Then in the case of the control by a microcomputer, a control signal from the microcomputer is converted into an analog voltage by the D/A converter circuit 7 and latched by the next stage voltage latch circuits 3-5 as respective control voltages. Since a pulse being the frequency division of a clock pulse for the microcomputer is used for switching the control signals, the D/A converter circuit 7 and the voltage latch circuits 3-5, the transmission of the control signals, the conversion of them, the voltage latch and the control of each control circuit are synchronized with each other. Thus, the plural control processings are controlled individually by a command from the microcomputer.</p> |
