RF power amplifier circuit
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United States of America Patent
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-
Jan 24, 2006
Grant Date -
May 8, 2003
app pub date -
Oct 11, 2002
filing date -
Oct 16, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A RF power amplifier circuit has at least one power transistor and a protection circuit protecting the power transistor against high voltages that lead to a destructive breakdown of the transistor. The circuit comprises a power transistor (2), a biasing circuit (6) biasing the power transistor; a peak detector (8) measuring the output voltage of the power transistor; and a comparator circuit (12) connected to the peak detector (8) and designed to reduce the base current of the power transistor (2) when controlled by the peak detector (8).
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