Cascode CMOS RF power amplifier with programmable feedback...

Details Cascode CMOS RF power amplifier with programmable feedback... Cascode CMOS RF power amplifier with programmable feedback...

2010-08-22

2011-11-22

Nguyen, Hieu (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural stages cascaded

C330S290000

Reexamination Certificate

active

08063706

ABSTRACT:
A Radio Frequency (RF) cascode power amplifier operates with differing battery supply voltages. A transconductance stage has a transistor with an RF signal input at its gate. A cascode stage has at least one cascode transistor, the cascode stage coupled in series with the transconductance stage between a battery voltage node and ground, the cascode stage having an RF signal output at the battery voltage node and at least one bias input to the at least one cascode transistor. Cascode bias feedback circuitry applies fixed bias voltage(s) to the at least one two bias inputs for a low battery voltage and applies feedback bias voltage(s) to the at least two bias inputs for a high battery voltage, the feedback bias voltage(s) based upon a voltage of the battery voltage node. More than two differing battery supply voltages are supported.

REFERENCES:
patent: 7276976 (2007-10-01), Oh et al.
patent: 2008/0036532 (2008-02-01), Pan
patent: 1526636 (2005-04-01), None
European Search Report; EP Application No. 10003954.4-2215, dated Aug. 5, 2010; 4 pages.
Park, C., et al.; “A 1.9-GHz CMOS Power Amplifier Using Three-Port Asymmetric Transmission Line Transformer for a Polar Transmitter,” IEEE Transactions on Microwave Theory and Techniques, vol. 55, No. 2, pp. 230-238, Feb. 2007.
Serneels, et al.; “A high-voltage output driver in a 2.5-V 0.25-μm CMOS technology,” IEEE Journal of Solid-State Circuits, vol. 40, No. 3, pp. 576-583, Mar. 2005.

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