| 摘要 |
<p>PURPOSE:To reduce energy consumption and to attain a correct mode switching by obtaining the power source of a first switching circuit which closes at the time of reproduction and opens at the time of record from a reproducing circuit, and obtaining the power sources of second and third switching circuits which close at the time of the record and open at the time of the reproduction from a reproducing circuit. CONSTITUTION:A transistor TR2 constitutes the first switching circuit which closes at the time of the reproduction and opens at the time of the record, and transistors TR1 and TR3 constitute the second and third switching circuits which close at the time of the record and open at the time of the reproduction respectively. A power is supplied from a power source Vcc2 on a reproducing circuit side through a switch SW2 to the first switching circuit, and to the second and third switching circuits, the power is supplied from the power sources Vcc1 and Vss on a recording circuit side through switches SW1 and SW3. Thus, the unnecessary power sources of the reproducing circuit and the recording circuit can be interrupted at the time of the record and the reproduction respectively. Thus, the energy consumption can be reduced in each case and a recording and reproducing mode can be correctly held.</p> |
