Method for avoiding avalanche breakdown caused by a lateral...

Amplifiers – With semiconductor amplifying device – Including plural stages cascaded

Reexamination Certificate

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C330S300000

Reexamination Certificate

active

06998921

ABSTRACT:
A power amplifier includes a transconductance stage, a cascode stage, and a connector. The transconductance stage is operable to receive an input voltage signal and to produce an output current signal. The cascode stage communicatively couples to the transconductance stage and is operable to receive the output current signal and to produce an output voltage signal based thereupon. The cascode stage includes a Metal Oxide Silicon (MOS) transistor and a corresponding parasitic bipolar transistor formed in parallel therewith in a semi conductive substrate. The MOS transistor has a drain, a gate, and a source. The corresponding parasitic bipolar junction transistor has a collector corresponding to the drain, an emitter corresponding to the source, and a base corresponding to the semi conductive substrate. The connector couples the base of the corresponding parasitic bipolar junction transistor to the source of the MOS transistor.

REFERENCES:
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patent: 5159207 (1992-10-01), Pavlin et al.
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patent: 5689209 (1997-11-01), Williams et al.
patent: 6198266 (2001-03-01), Mercer
patent: 6232848 (2001-05-01), Manku
“A High-Swing, High-Impedance MOS Cascode Circuit”, by Eduard Sackinger & Walter Guggenbuhl; 8107 IEEE Journal of Solid-State Circuits-25 (1990) Feb., No. 1, New York, US.
“MOS Amplifer Gain-Bandwidth Enhancement Using Body Signals” by F. S. Shoucair, Department of Electrical Engineering, Brown University, Box D, Providence, RI 02912, USA— Feb. 5, 1991;8030 Electronics Letters—27(1991) Jun. 6, No. 12, Stevenage, Herts., GB.

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