JPS6378316U - - Google Patents

Description

[Brief explanation of the drawing]

The illustrated circuit is one embodiment of the control circuit of the present invention. Explanation of main drawing numbers, 1...first magnetic head, 2...second magnetic head, 3 ...tape recorder circuit, 6...
Reproducing amplifier circuit, 7... switch circuit, 9... control terminal, 10... first switch, 11... second switch,
14... First transistor, 17... Second transistor, 19... No-signal portion detection circuit, 22... Control transistor, 25... Third switch, 26... Driving transistor, 28... Plunger, 31... Muting transistor.

Claims (1)

[Scope of utility model registration request] In a tape recorder in which a first tape recorder having a playback function and a song selection function and a second tape recorder having a playback function are built into the same cabinet, the tape recorder is built into the first tape recorder and performs a playback operation. a first magnetic head; a second magnetic head that is incorporated in a second tape recorder and performs a reproducing operation; a signal reproduced by the first magnetic head or the second magnetic head is input and the signal is amplified; a first switch that is closed when a playback operation is performed on the first tape recorder; a second switch that is closed when a playback operation is performed on the second tape recorder; A switch circuit that is provided in the input signal path of the amplifier circuit and that guides the signal from the magnetic head corresponding to the switch that is closed first among the first switch and the second switch to the reproduction amplifier circuit. a third switch that is closed when a fast forward or rewind operation is performed on the first tape recorder; and a bias current is applied to the base through the first switch when the first switch is closed before the second switch. When the third switch is closed while a bias current is supplied to the base of the control transistor and the base of the control transistor, the third switch becomes conductive and the first tape recorder is brought into the song selection operation state by the suction operation. The drive transistor is connected as a load to the plunger held in the drive transistor, and a no-signal portion detection circuit receives the signal from the reproduction amplifier circuit and detects the no-signal portion between the signals, and detects the no-signal portion between the signals. When the non-signal area detection circuit detects a non-signal area, the output signal causes the control transistor to become non-conductive, and the plunger returns to the non-suction operating state, thereby placing the tape recorder in the reproducing operating state. A control circuit for a tape recorder, characterized in that the control circuit switches the control circuit to a tape recorder.