Amplifiers – With semiconductor amplifying device – Including gain control means
Reexamination Certificate
2005-10-25
2005-10-25
Mottola, Steven J. (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including gain control means
C330S133000
Reexamination Certificate
active
06958656
ABSTRACT:
The present invention provides a power amplifier module featuring that: its output power characteristic smoothly changes as the input control voltage changes; and its control sensitivity is stable over a wide dynamic range. By same means, idling current for gain setting is supplied to a single amplifier element or all of multiple stages of amplifier elements of the power amplifier module. By making this idling current behave so as to exponentially change, relative to input control voltage, the invention enables output power control proportional to the input control voltage.
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Kondo Shizuo
Tanoue Tomonori
Yamashita Kiichi
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