Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-04-17
2007-04-17
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S311000, C330S302000
Reexamination Certificate
active
11120844
ABSTRACT:
A high-power, high frequency (1–100 GHz) power amplifier, made using SiGe transistors. A differential common-emitter amplifier section supplies the voltage amplification, allowing the total voltage swing of the amplifier to be twice the breakdown voltage of the individual transistors. Current amplification is supplied by a differential common-emitter amplifier section, connected in cascode with the differential common-emitter amplifier section. Appropriately chosen resonators in the cascode connection resonate out the Miller effect, negative current feed back of the circuit at the amplifier's operational frequency, allowing the amplifier to provide high power output at the operational frequency.
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Helms David Richard
Point, Jr. Robert Warrant
M/A-Com Inc.
Nguyen Patricia
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