High frequency circuit using high output amplifier cell...

Amplifiers – With plural amplifier channels – Redundant amplifier circuits

Reexamination Certificate

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C330S295000

Reexamination Certificate

active

06927625

ABSTRACT:
A high frequency circuit capable of realizing a power amplifier with a wide dynamic range in which it is hard to degrade the power addition efficiency at low output is formed by using a high output amplifier cell block configured to amplify input signals at a time of high output power, in which a DC power source voltage is supplied in parallel to first amplifier cells that are connected in parallel AC-wise with respect to input/output signals, and a low output amplifier cell block configured to amplify input signals at a time of low output power, in which a DC power source voltage is supplied in series to second amplifier cells that are connected in parallel AC-wise with respect to input/output signals.

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patent: 6615028 (2003-09-01), Loke et al.
patent: 6636115 (2003-10-01), Kim et al.
patent: 6750721 (2004-06-01), Patterson
patent: 6816015 (2004-11-01), Zhang et al.

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