R. F. power amplifier
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United States of America Patent
Stats
-
May 10, 1988
Grant Date -
N/A
app pub date -
Jun 20, 1986
filing date -
Jun 26, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An r.f. power amplifier, typically a high efficiency, class E amplifier in which a reactive load circuit (18) is connected to a semiconductor switching device (10), the load circuit being designed to have the required input load angle and loaded Q so that the voltage across the device (10) goes to zero with zero slope before it switches on and passes current, is provided with a step recovery diode (32) connected to the device (10) to limit the voltage swing across the device (10) with no significant loss of efficiency. This allows the voltage-handling capability required of the device to be reduced or the amplifier output power to be increased by increasing the supply voltage.
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