Amplifier and radio frequency power amplifier using the same

Details Amplifier and radio frequency power amplifier using the same Amplifier and radio frequency power amplifier using the same

2006-09-05

2006-09-05

Nguyen, Khanh Van (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S136000, C330S297000

Reexamination Certificate

active

07102427

ABSTRACT:
An amplifier using a wide band, high efficiency, and low distortion amplifier free from clipping distortion, and a high efficiency and low distortion radio frequency power amplifier, using that amplifier, which can be applied to wide band wireless communication systems are provided. The amplifier has a DC—DC converter2,augmented with a low pass filter4,for amplifying the low frequency components of an input signal from a terminal5,and a class B amplifier, augmented with a high pass filter, for amplifying the input signal and supplying its high frequency components after amplification. The DC—DC converter and the class B amplifier are connected in parallel, and the power supply voltage of the class B amplifier is controlled with the low frequency components of the input signal.

REFERENCES:
patent: 6084468 (2000-07-01), Sigmon et al.
patent: 6175273 (2001-01-01), Sigmon et al.
patent: 6710649 (2004-03-01), Matsumoto et al.

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