Amplifiers – With semiconductor amplifying device – Including class d amplifier
Reexamination Certificate
2009-09-18
2011-10-18
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including class d amplifier
Reexamination Certificate
active
08040183
ABSTRACT:
The present invention is an H-bridge power amplifier circuit which includes diodes connected in parallel with MOSFET switch pairs of the circuit, each MOSFET switch pair including a MOSFET switch and a reverse-conduction blocking switch. Further, the circuit includes a snubber inductor which is connected to the switch pairs and the diodes. The circuit further includes a control branch/control sub-circuit having a snubber capacitor and a control MOSFET switch. The circuit is configured for: blocking MOSFET negative current to prevent body diode conduction; inhibiting/preventing turn-off losses of the MOSFETs; and reducing switching losses associated with operation into inductive mistuning.
REFERENCES:
patent: 6469919 (2002-10-01), Bennett
Barbieri Daniel M.
Nguyen Khiem
Pascal Robert
Rockwell Collins, Inc.
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