Play/record switching circuit for a signal reproducing and recor

Details Play/record switching circuit for a signal reproducing and recor Play/record switching circuit for a signal reproducing and recor

1978-08-14

1980-05-13

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 61, G11B 1512

Patent

active

042031397

ABSTRACT:
A play/record switching circuit for an electrical signal reproducing and recording apparatus having inputs for source data signals and a microphone data signal, and a tape head for generating a tape head reproducing signal and for receiving one of the data signals to be recorded. The circuit includes one mechanical switch for selecting one of said signals, another mechanical switch for selecting either a play or a record mode, and electrical amplifiers for processing the various signals and for monitoring the processed signals. Positive- and negative- logic-controlled electronic bilateral switches are controlled by a D.C. voltage control signal for selecting the appropriate processing amplifier and the appropriate monitor amplifier in dependence upon which mode has been selected and which signal has been selected by both mechanical switches. The electronic amplifiers and the bilateral switches and the D.C. control signal circuitry are all incorporated on a single integrated circuit chip.

REFERENCES:
patent: 3347996 (1967-10-01), Uchikoshi
patent: 3810135 (1974-05-01), Kawakami et al.
patent: 3930266 (1975-12-01), Okamoro
patent: 3959817 (1976-05-01), Honjo et al.

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