Amplifiers – With semiconductor amplifying device – Including frequency-responsive means in the signal...
Reexamination Certificate
2006-05-02
2006-05-02
Choe, Henry (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including frequency-responsive means in the signal...
C330S306000
Reexamination Certificate
active
07038547
ABSTRACT:
An amplifier circuit has an amplifier, a D.C. bias circuit, and an output signal path. The amplifier amplifies a modulated signal that has a carrier frequency. The D.C. bias circuit has a decoupling capacitor that is coupled to a transmission line having a length equal to N times the wavelength of the carrier frequency divided by four, where N is an odd integer. A low frequency decoupling capacitor is located between the decoupling capacitor and the output of the amplifier to reduce intermodulation distortion products. In one embodiment, the low frequency decoupling capacitor is a tantalum capacitor.
REFERENCES:
patent: 5276406 (1994-01-01), Samay et al.
patent: 5329249 (1994-07-01), Cripps
patent: 6163222 (2000-12-01), Kobayashi
patent: 6236274 (2001-05-01), Liu
patent: 6664871 (2003-12-01), Yip
Kapoor Samay P.
Rabany Antoine J.
Choe Henry
Clingan, Jr. James L.
Dolezal David G.
Freescale Semiconductor Inc.
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