| 摘要 |
Tape recorder apparatus includes an amplifier section and a tape deck section which is selectively attachable to and detachable from the amplifier section. The amplifier section includes a muting circuit which is connected to an amplifier bias circuit and is adapted to be connected to a switch circuit in the tape deck section when the tape deck section is connected to the amplifier section. When the two sections are connected, the switch circuit supplies a muting release instruction to the muting circuit in the amplifier section for normal amplifying operation and, when the two sections are disconnected from one another, the muting release instruction from the switch circuit in the tape deck section is withheld from the muting circuit in the amplifier section, thus disabling the amplifying function of the amplifier section by causing a change in the bias potential supplied by the amplifier bias circuit. Accordingly, a loudspeaker which may be connected as an output load on the amplifier section will not reproduce electrical noises caused when input circuitry of the amplifier section is disconnected from a magnetic head of the tape deck section each time the tape deck section is detached from the amplifier section.
|
