Multiple power mode amplifier with bias modulation option...

Details Multiple power mode amplifier with bias modulation option... Multiple power mode amplifier with bias modulation option...

2007-09-19

2008-09-02

Choe, Henry (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

C330S12400D

Reexamination Certificate

active

07420412

ABSTRACT:
A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power mode, the power consumption of the amplifier is reduced, which will increase operation time, especially important for battery-operated devices. In one implementation, the amplifier includes a number of impedance matching network units (130, 140, 150, and160), impedance transformer (170), and a power stage (120). An implementation provides further power consumption savings by modulating a bias of an amplifier stage.

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English Abstract and drawing corresponding to Korean patent document No. 2001-0105151, 2 pages.
Patent Abstracts of Japan—English language abstract of Japanese Patent Application No. 07/181672 filed Jul. 18, 1995.
English language translation of Official Action dated Apr. 9, 2007 for Japanese Patent Appln. No. 2004/055035.
Official Action dated Apr. 9, 2007 from the Japanese Patent Office for Japanese Patent Appln. No. 2004/055035 (Japanese language).
Office Action dated Nov. 28, 2007 from Examiner Henry Choe in U.S. App. No. 11/857,603.
Office Action dated Nov. 28, 2007 from Examiner Henry Choe in U.S. Appl. No. 11/857,966.

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