High linearity smart HBT power amplifiers for CDMA/WCDMA...

Details High linearity smart HBT power amplifiers for CDMA/WCDMA... High linearity smart HBT power amplifiers for CDMA/WCDMA...

2006-04-11

2006-04-11

Mai, Lam T. (Department: 2819)

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

C330S296000

Reexamination Certificate

active

07026876

ABSTRACT:
A power amplifier includes larger size transistors to provide higher power gain at lower frequencies. Transistors of transistor unit cells include a horseshoe-shaped emitter and a strip-shaped base to increase gain. Transistors are combined at a first level to form transistor arrays, which are combined with bonding wires at a second level to an output micro strip transmission line. A Vbe referenced bias circuit may include a smart function to lower quiescent current.

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