Power amplifier

Details Power amplifier Power amplifier

2007-07-11

2009-06-30

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

C330S306000

Reexamination Certificate

active

07554410

ABSTRACT:
A power amplifier amplifies an input signal having a fundamental frequency of which band width ranges between a first fundamental frequency F1and a second fundamental frequency F2. The power amplifier includes a power amplifier transistor for amplifying the input signal and an output matching circuit for suppressing a harmonic component included in an output signal from the power amplifier transistor. The output matching circuit includes: a first second-order harmonic series resonant circuit including a first inductor and a first capacitor and having a frequency twice as large as F1as a resonance frequency; and a second second-order harmonic series resonant circuit including a second inductor and a second capacitor and having a frequency twice as large as F2as a resonance frequency.

REFERENCES:
patent: 4717884 (1988-01-01), Mitzlaff
patent: 5406224 (1995-04-01), Mikami et al.
patent: 6163221 (2000-12-01), Matsuno
patent: 6236274 (2001-05-01), Liu
patent: 6535069 (2003-03-01), Fujioka et al.
patent: 7176769 (2007-02-01), Ellis
patent: 7362171 (2008-04-01), Kunihiro
patent: 2000-40928 (2000-02-01), None
patent: 2002-43873 (2002-02-01), None

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