Amplifiers – With control of power supply or bias voltage – With control of input electrode or gain control electrode bias
Reexamination Certificate
2006-10-17
2006-10-17
Mottola, Steven J. (Department: 2817)
Amplifiers
With control of power supply or bias voltage
With control of input electrode or gain control electrode bias
C330S281000, C330S284000
Reexamination Certificate
active
07123089
ABSTRACT:
An amplifier includes a plurality of power amplifier elements connected in cascaded multiple stages, a first bias power supply, a second bias power supply, a switching circuit configured to switch a first output supplied from the first bias power supply in response to a modulation pulse so as to transmit the first output to the plurality of power amplifier elements, a pulse differentiating circuit configured to differentiate the modulation pulse by a given time constant, and an adder circuit configured to add the differentiated modulation pulse and a second output of the second bias power supply so as to transmit the differentiated modulation pulse added to the second output as an input bias voltage to at least one of the plurality of power amplifier elements except for a final stage in the cascaded multiple stages.
REFERENCES:
patent: 5194823 (1993-03-01), Wendt et al.
patent: 2001/0014593 (2001-08-01), McCune
patent: 2002/0140503 (2002-10-01), Fujiwara et al.
patent: 55-49044 (1980-04-01), None
patent: 59-37737 (1984-03-01), None
patent: 2001-16045 (2001-01-01), None
No affiliations
Kabushiki Kaisha Toshiba
Mottola Steven J.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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