Soft-switching driver output stage and method

Details Soft-switching driver output stage and method Soft-switching driver output stage and method

1996-09-09

1998-09-22

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Signal transmission integrity or spurious noise override

327379, 327387, 327384, 327108, 327437, 326 27, H03B 104, H03K 1716

Patent

active

058120106

ABSTRACT:
A circuit for and a method of driving first and second power transistors arranged in series in a half-bridge configuration provides for soft turn-on of the power transistors when there is a change of state in the input voltage. When the input voltage initially changes state, the gate drive voltage of one of the power transistors is raised to a voltage barely above its threshold value for a predetermined interval. The gate drive voltage of this power transistor is then raised to the supply voltage value. When the input voltage again changes state, the transistor is turned off, and the other transistor is turned on in a similar manner. As a result, when one of the transistors is turned on, current transients in the other transistor is reduced.

REFERENCES:
patent: 5315187 (1994-05-01), Cheng

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