Automatic recording level controlling circuit

Details Automatic recording level controlling circuit Automatic recording level controlling circuit

1979-05-23

1981-03-24

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 25, 360 68, G11B 2736, G11B 502

Patent

active

042583977

ABSTRACT:
An automatic recording level controlling circuit comprises an audio test signal oscillator, a variable loss attenuation circuit, level detecting circuitry and a control circuit for controlling the attenuation factor of the variable loss attenuation circuit in accordance with the output of the level detecting circuitry. The level of a reproduced signal corresponding to the test signal is detected to see the deviation from a reference level so that the attenuation factor of the variable loss attenuation circuit is controlled in such a manner that the level of the reproduced signal is as close to the reference level as possible.

REFERENCES:
patent: 2791640 (1957-05-01), Wolfe
patent: 4011585 (1977-03-01), Sunaga

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