Amplifiers – With semiconductor amplifying device – Including temperature compensation means
Reexamination Certificate
2005-06-14
2005-06-14
Mottola, Steven J. (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including temperature compensation means
C330S283000
Reexamination Certificate
active
06906592
ABSTRACT:
A radio frequency (RF) driver amplifier system and method that provides linear in decibel gain control is provided. The RF driver amplifier system comprises a linear transconductor receiving an input voltage and providing a controlled current based on input voltage received, temperature compensation circuitry for varying current from the linear transconductor according to absolute temperature, an exponential current controller receiving current varied according to temperature and providing an exponential current in response, and an inductive degeneration compensator receiving exponential current and providing a control current to driver amplifier circuitry, thereby compensating for inductive degeneration due to at least one inductor in the driver amplifier circuitry. Control current passes from the inductive degeneration compensator to the driver amplifier circuitry. Output gain from the driver amplifier circuitry varies linearly in decibels with respect to the input voltage.
REFERENCES:
patent: 5099204 (1992-03-01), Wheatley, III
patent: 5105165 (1992-04-01), Bien
patent: 5442311 (1995-08-01), Trafton
patent: 5572166 (1996-11-01), Gilbert
patent: 5589791 (1996-12-01), Gilbert
patent: 5764106 (1998-06-01), Deen et al.
patent: 5880631 (1999-03-01), Sahota
patent: 5994961 (1999-11-01), Lunn et al.
patent: 6028478 (2000-02-01), Seremeta et al.
patent: 6084471 (2000-07-01), Ruth, Jr. et al.
patent: 6084472 (2000-07-01), Gilbert
patent: 6124761 (2000-09-01), Robinson et al.
patent: 6163198 (2000-12-01), Cargill
patent: 6215989 (2001-04-01), Otaka
patent: 6414547 (2002-07-01), Shkap
patent: 6426677 (2002-07-01), Prentice
patent: 6466085 (2002-10-01), Setty
patent: 6509796 (2003-01-01), Nguyen et al.
patent: 6525606 (2003-02-01), Atkinson
patent: 6538507 (2003-03-01), Prentice et al.
patent: 6559717 (2003-05-01), Lynn et al.
patent: 6563383 (2003-05-01), Otaka et al.
patent: 2002/0079967 (2002-06-01), Prentice
patent: 2002/0140507 (2002-10-01), Filoramo et al.
patent: 2003/0090323 (2003-05-01), Costa et al.
patent: 0601740 (1994-06-01), None
patent: 0601888 (1994-06-01), None
patent: 2208053 (1989-02-01), None
“100MHz Current Feedback Amplifier with DC Gain Control,” source(s): Linear Technology.
“Dual, Low Noise, Single-Supply Variable Gain Amplifier,” sources(s): Analog Devices.
Haekkimen, J. et al., “A Temperature Compensated 100 MHZ to 1 GHZ Variable Gain Amplifier in a 8 GHZ 1.2 Murn Bicmos Process,” XP000825544 (1996).
Keng Leong Fong, “High Frequency Analysis of Linearity Improvement Technique of Common-Emitter Transconductance Stage Using a Low Frequency Trap Network,” XP001075130 (2000).
Barnett Kenneth
Gard Kevin
Walker Brett C.
Brown Charles D
Mottola Steven J.
Pappas George
Qualcomm Inc
Wadsworth Philip R
LandOfFree
Continuously variable gain radio frequency driver amplifier... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuously variable gain radio frequency driver amplifier..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuously variable gain radio frequency driver amplifier... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3484032