Play/record switching circuit for a signal reproducing and recording apparatus
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United States of America Patent
Stats
-
May 13, 1980
Grant Date -
N/A
app pub date -
Aug 14, 1978
filing date -
Aug 17, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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