Power amplifier

Details Power amplifier Power amplifier

2011-04-19

2011-04-19

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including combined diverse-type semiconductor device

C330S302000, C330S310000

Reexamination Certificate

active

07928804

ABSTRACT:
A power amplifier includes: a semiconductor substrate; a preceding-stage amplifying device on the semiconductor substrate, amplifying an input signal; a following-stage amplifying device on the semiconductor substrate, amplifying an output signal of the preceding-stage amplifying device; and an inter-stage matching circuit connecting the preceding-stage amplifying device to the following-stage amplifying device. The preceding-stage amplifying device has a first field effect transistor; the following-stage amplifying device has a heterojunction bipolar transistor; and the inter-stage matching circuit has a capacitance galvanically separating the output terminal of the preceding-stage amplifying device from the input terminal of the following-stage amplifying device.

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