Amplifiers – With semiconductor amplifying device – Including plural amplifier channels
Reexamination Certificate
2006-08-08
2008-12-30
Lee, Benny (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including plural amplifier channels
C330S051000
Reexamination Certificate
active
07471154
ABSTRACT:
To improve operation during cutback power mode by reducing gain expansion, sections of a multi-section amplifier are selectively biased. During cutback power condition, fewer than all sections of the multi-section amplifier are biased. Selective biasing reduces power consumption and obtains desired output power. To reduce gain expansion, a bias resistor is provided between one or more sections to establish a small or leakage bias current into non-enabled or non-biased sections. This leakage bias current weakly biases the non-enabled sections allowing small signal amplification by the non-enabled sections. The combined amplification of the enabled section and the weakly biased section provide greater initial gain at lower power input signal levels thereby reducing gain expansion.
REFERENCES:
patent: 4162452 (1979-07-01), Ash
patent: 4430732 (1984-02-01), Saga et al.
patent: 4501018 (1985-02-01), Shanley
patent: 5450044 (1995-09-01), Hulick
patent: 5553319 (1996-09-01), Tanbakuchi
patent: 5859869 (1999-01-01), Sanderford
patent: 5942938 (1999-08-01), Myers
patent: 6101224 (2000-08-01), Lindoffi
patent: 6130579 (2000-10-01), Iyer et al.
patent: 6172567 (2001-01-01), Ueno et al.
patent: 6194963 (2001-02-01), Camp
patent: 6233440 (2001-05-01), Taylor
patent: 6300835 (2001-10-01), Seely et al.
patent: 6300837 (2001-10-01), Sowlati et al.
patent: 6333677 (2001-12-01), Dening
patent: 6445247 (2002-09-01), Walker
patent: 6492875 (2002-12-01), Luo et al.
patent: 6496061 (2002-12-01), Bloom et al.
patent: 6510309 (2003-01-01), Thompson et al.
patent: 6651021 (2003-11-01), Underbrink et al.
patent: 6681101 (2004-01-01), Eidson et al.
patent: 6763228 (2004-07-01), Prentice
patent: 6771128 (2004-08-01), Yamashita et al.
patent: 6819182 (2004-11-01), Sibrai
patent: 6853250 (2005-02-01), Bachhuber et al.
patent: 6873208 (2005-03-01), Shinjo et al.
patent: 6873211 (2005-03-01), Thompson et al.
patent: 6970040 (2005-11-01), Dening
patent: 6996191 (2006-02-01), Meditz
patent: 7295065 (2007-11-01), Shah et al.
patent: 2004/0142674 (2004-07-01), Kuiri
patent: 0597653 (1994-05-01), None
patent: 0624004 (1994-11-01), None
patent: 0800267 (1997-08-01), None
patent: 2235855 (1991-03-01), None
patent: 57069939 (1982-04-01), None
patent: WO 96 17431 (1996-06-01), None
patent: WO 02/078170 (2002-10-01), None
“Working Both Ways”, Electronics & Wireless World, Dec. 1986, No. 1610, 1 page.
Lee Benny
Skyworks Solutions Inc.
Weide & Miller Ltd.
Wong Alan
LandOfFree
Bias circuit for maintaining high linearity at cutback power... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bias circuit for maintaining high linearity at cutback power..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bias circuit for maintaining high linearity at cutback power... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4040879