Power amplifier with controllable lossless snubber circuit

Details Power amplifier with controllable lossless snubber circuit Power amplifier with controllable lossless snubber circuit

1982-10-26

1985-02-26

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 91, 363132, H02H 720

Patent

active

045020850

ABSTRACT:
A snubber circuit for accepting current from the load at times when switching elements of a bridge switching amplifier are being turned off was described incorporating a capacitor and diode for directing the current back to the power supply wherein the capacitor is precharged by an inductor and capacitor and at least one diode to provide resonant charging of the capacitor. A switch is also provided for activating or deactivating the snubber circuit in response to a control signal. The snubber circuit overcomes the problem of excessive power dissipation in resistors of conventional snubber circuits.

REFERENCES:
patent: 4093877 (1978-06-01), Pollmeier
patent: 4106088 (1978-08-01), Bergan
patent: 4403269 (1983-09-01), Carroll

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