Amplifiers – With semiconductor amplifying device – Including protection means
Reexamination Certificate
2005-02-01
2005-02-01
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including protection means
C330S133000, C330S20700P, C330S310000
Reexamination Certificate
active
06850119
ABSTRACT:
The present invention relates to detecting overload conditions from within the bias circuitry for a multistage amplifier. Preferably, the overload condition is detected in the bias circuitry associated with the output stage of the amplifier. Upon detection of an overload, steps are taken to shunt the RF drive or reduce bias at one or more preceding stages of the amplifier to limit the excessive voltages or currents in the output stage.
REFERENCES:
patent: 3852669 (1974-12-01), Bowman et al.
patent: 4547746 (1985-10-01), Erickson et al.
patent: 4647871 (1987-03-01), Turner, Jr.
patent: 4729129 (1988-03-01), Koerner
patent: 4887298 (1989-12-01), Haigler
patent: 5003271 (1991-03-01), Swanson
patent: 5070309 (1991-12-01), Swanson
patent: 5196808 (1993-03-01), Pickett et al.
patent: 5220290 (1993-06-01), Black
patent: 5404114 (1995-04-01), Sager
patent: 5426395 (1995-06-01), Cygan
patent: 5542096 (1996-07-01), Cygan et al.
patent: 5548248 (1996-08-01), Wang
patent: 5590415 (1996-12-01), Peltola et al.
patent: 5913154 (1999-06-01), Wynn
patent: 6124758 (2000-09-01), Korte et al.
patent: 6137366 (2000-10-01), King
patent: 6329879 (2001-12-01), Maruyama et al.
patent: 6472937 (2002-10-01), Gerard et al.
RF Micro Devices, Inc.
Withrow & Terranova , PLLC
LandOfFree
Power amplifier overload protection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power amplifier overload protection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power amplifier overload protection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3486132