Amplifier malfunction detector

Details Amplifier malfunction detector Amplifier malfunction detector

1975-06-23

1977-06-14

Schaefer, Robert K.

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

361 86, 330207P, 307359, H02H 328

Patent

active

040300129

ABSTRACT:
A detection device for sensing malfunctions in a wide band power amplifier, driving the take-up spool motor of a reel-to-reel tape transport system, is disclosed. A feedback loop is connected from the output of the amplifier to a malfunction junction positioned at the input of the amplifier. The signal at the malfunction junction is monitored and compared with a predetermined range of standard reference signals. Whenever the malfunction junction signal is out of the predetermined range, the power amplifier is turned off thereby preventing damage to the tape. A filter means is positioned so as to desensitize the compare means until the amplifier is operating at steady state.

REFERENCES:
patent: 3406319 (1968-10-01), Faulkes
patent: 3544983 (1970-12-01), Wallace et al.
patent: 3657660 (1972-04-01), Pfersch
patent: 3761775 (1973-09-01), Ozawa et al.
patent: 3809335 (1974-05-01), Mantey
patent: 3880385 (1975-04-01), Reynolds et al.
patent: 3891933 (1975-06-01), Suzuki et al.
patent: 3931547 (1976-01-01), Glogolja

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