Linear power efficient radio frequency (RF) driver system...

Details Linear power efficient radio frequency (RF) driver system... Linear power efficient radio frequency (RF) driver system...

2007-07-31

2007-07-31

Van Nguyen, Khanh (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S133000, C330S285000

Reexamination Certificate

active

11168119

ABSTRACT:
A linear power efficient radio frequency (RF) driver system (100) includes a pre-driver amplifier (105) for amplifying an RF signal; and an output driver (107) having a substantially high impedance input for amplifying the signal from the pre-driver amplifier (105). A bias controller (109) is used for controlling the RF power output of the output driver (107) where the current drain of the pre-driver amplifier (105) and the bias controller (109) are controlled to a minimum level while maintaining linearity of the output driver (107). The system and method of the invention work to provide minimal current drain in portable products using simultaneous current and power amplifier reduction based on driver input swing to lower signal distortion.

REFERENCES:
patent: 6009119 (1999-12-01), Jovanovich et al.
patent: 6480700 (2002-11-01), Groe et al.
patent: 6681101 (2004-01-01), Eidson et al.
patent: 6684064 (2004-01-01), Kazakevich et al.
patent: 6937102 (2005-08-01), Lopez et al.

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