Circuitry for adjustment of biasing current for recording sound by two-head type tape-recorder
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United States of America Patent
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-
Jan 27, 1981
Grant Date -
N/A
app pub date -
Apr 12, 1979
filing date -
Apr 28, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuitry has a calibration signal generator, a higher frequency range output level adjusting circuit and a recording bias current adjusting variable resistor. The signal generator continually alternately gives output two kinds of calibration signals of lower and higher frequencies. The higher range adjusting circuit is operatively connected with the variable resistor, and adjusts output sound level, as indicated at an indicator, only of the higher frequency signal of the two calibration signals.
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