| 摘要 |
<p>PURPOSE: To set parts for driving cassette mechanism in a stopped state without increasing a connecting means by applying DC voltage to an output signal line when an IC memory pack is attached to a cassette housing part and applying it to the stop terminal of a logic control through the connecting means. CONSTITUTION: The DC voltage of the filter output FIL-OUT of a band pass filter BPF is applied to an input terminal 3 through an output pin C when the IC memory pack 5 is attached at the cassette housing part. A current is made to flow into the base of a transistor Q1 through a resistor R4 by the DC voltage, so that the transistor Q1 is turned on. The current is made to flow into the base of the transistor Q1 through the resistor R5 from the collector of the transistor Q1 , so that the transistor Q2 is turned on. The collector of the transistor Q2 is made as a power source VDD, and the STOP of the logic control IC4 is made as an H level, so that the operation of the logic control IC4 is set in a standstill state. Thus, the logic control IC4 does not operate the cassette mechanism even when control inputs are inputted to FF, PLAY, REC and REW.</p> |
