Amplifiers – Combined with automatic amplifier disabling switch means
Reexamination Certificate
2007-08-21
2007-08-21
Nguyen, Patricia (Department: 2817)
Amplifiers
Combined with automatic amplifier disabling switch means
C330S310000, C330S284000
Reexamination Certificate
active
11166089
ABSTRACT:
A plurality of variable gain amplifier stages are coupled by an attenuation circuit that receives a voltage input to be amplified. A control circuit activates each of the variable gain amplifier stages in a seamless manner in accordance with a control signal applied to a voltage control node, while maintaining no more than one of the stages active at any time. Fractions of the reference signal voltage level are set to define boundaries between control voltage level ranges of the amplifier stages. A unique control voltage level range is thus established for each amplifier stage. A control voltage hysteresis range can be provided to avoid oscillations between stages at the transition voltages.
REFERENCES:
patent: 3594652 (1971-07-01), Springer et al.
patent: 4598252 (1986-07-01), Andricos
patent: 5077541 (1991-12-01), Gilbert
patent: 5432478 (1995-07-01), Gilbert
patent: 5548246 (1996-08-01), Yamamoto et al.
patent: 5684431 (1997-11-01), Gilbert et al.
patent: 6172549 (2001-01-01), Gilbert
patent: 6204719 (2001-03-01), Gilbert
patent: 6348829 (2002-02-01), Gilbert
patent: 6400227 (2002-06-01), Goldfarb et al.
patent: 6429720 (2002-08-01), Gilbert
patent: 6437630 (2002-08-01), Gilbert
patent: 6445248 (2002-09-01), Gilbert
patent: 6489849 (2002-12-01), Gilbert
patent: 6525601 (2003-02-01), Gilbert
patent: 6842071 (2005-01-01), Retz et al.
patent: 6927628 (2005-08-01), Oshima et al.
patent: 7098738 (2006-08-01), Tam et al.
patent: 0638 997 (1991-08-01), None
patent: 2 721 155 (1994-08-01), None
Analog Related Product AD8367, “500MHz, 45dB Linear-in-dB Variable Gain Amplifier,” with AGC Detector, released most likely in 2001.
Analog Related Product AD8362, “50Hz to 2.7GHz 60dB TruPwr Detector,” released in 2003.
Analog Related Product AD8361, “2.5GHz TruPwr Detector,” released most likely in 2001.
Linear Technology Corporation
McDermott Will & Emery LLP
Nguyen Patricia
LandOfFree
Wide dynamic range switching variable gain amplifier and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wide dynamic range switching variable gain amplifier and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide dynamic range switching variable gain amplifier and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3868237