Circuits for preventing unwanted output transients in amplifiers

Details Circuits for preventing unwanted output transients in amplifiers Circuits for preventing unwanted output transients in amplifiers

1998-11-19

2000-11-28

Gensler, Paul

Amplifiers

Combined with automatic amplifier disabling switch means

330267, 330298, 341144, H03F 114, H03F 326, H02H 720, H03M 166

Patent

active

061540927

ABSTRACT:
The present invention reduces certain unwanted transients in an output stage by sensing the power supply and disabling the output stage output devices in correlation with the sensing of an invalid bias. In preferred embodiments, the bias is measured at a node that is the last bias node to reach a steady state during power up or power glitches. This ensures that all portions of the output stage are being provided a valid bias prior to enabling the output devices of the output stage. By enabling the output devices only after a valid bias is present, signals generated by the output devices are based upon valid operation of the output stage.

REFERENCES:
patent: 3569849 (1971-03-01), Cassidy
patent: 4502020 (1985-02-01), Nelson et al.
patent: 4973916 (1990-11-01), Baik
patent: 4991916 (1991-02-01), Deaver

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