Mode switching circuit for use in a reproducing apparatus

Details Mode switching circuit for use in a reproducing apparatus Mode switching circuit for use in a reproducing apparatus

1983-12-22

1986-06-24

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 744, G11B 1512, G11B 1546

Patent

active

045970220

ABSTRACT:
A mode switching circuit is for use in a reproducing apparatus, and comprises a rotation detecting circuit for detecting the rotation of a rotary body which rotates according to a moving tape, a plunger solenoid for driving a plunger which switches the operating state of the reproducing apparatus to a state which is in accordance with the moving mode of the tape, an unrecorded band detecting circuit for detecting an unrecorded band from the tape which moves in a fast-forward mode during a program selecting mode of the reproducing apparatus, a control circuit coupled to the rotation detecting circuit and to the unrecorded band detecting circuit, and a feedback path coupled from a connection point between the control circuit and the plunger solenoid to the rotation detecting circuit through a resistor. The control circuit cuts off a supply of a current to the plunger solenoid while the rotation detecting circuit is detecting the rotation of the rotary body, supplies a current to the plunger solenoid when the rotation detecting circuit detects a stoppage of the rotation of the rotary body, and supplies a current to the plunger solenoid when the unrecorded band detecting circuit detects an unrecorded band during the program selecting mode of the reproducing apparatus.

REFERENCES:
patent: 4288823 (1981-09-01), Yamamuro et al.
patent: 4301481 (1981-11-01), Suzuki
patent: 4367500 (1983-01-01), Furuta et al.

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