Amplifiers – With semiconductor amplifying device – Including plural stages cascaded
Reexamination Certificate
2008-10-19
2010-06-15
Choe, Henry K (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including plural stages cascaded
C330S310000
Reexamination Certificate
active
07737789
ABSTRACT:
A broadband active balun configuration is provided. According to embodiments, the subject active balun can include a cascade and cascade transistor pair using a shared input transistor. In a further implementation, a low-pass bias-feedback mechanism for maintaining stable bias conditions can be provided.
REFERENCES:
patent: 6492875 (2002-12-01), Luo et al.
patent: 7274258 (2007-09-01), Wang
patent: 7279985 (2007-10-01), Chang et al.
J. Yoon and W. R. Eisenstadt, “Lumped passive circuits for 5GHz embedded test of RF SoCs,”Int. Symp. Circuits and Syst., vol. 1, pp. I241-I244, May 2004.
W. R. Eisenstadt, et al., “On-chip microwave test circuits for production IC measurements,”64th ARFTG Microwave Measurements Conf., pp. 213-219, Dec. 2004.
J. Yoon and W. R. Eisenstadt, “Embedded loopback test for RE ICs,”IEEE Trans. Instrumentation and Measurement, vol. 54, pp. 1715-1720, Oct. 2005.
A. H. Baree and I. D. Robertson, “Monolithic MESFET distributed baluns based on the distributed amplifier gate-line termination technique,”IEEE Trans. Microwave Theory Tech., vol. 45, pp. 118-195, Feb. 1997.
Y. Xuan and J. L. Fikart, “Computer-aided design of microwave frequency doublers using a new circuit structure,”IEEE Trans. Microwave Theory Tech., vol. 41, Dec. 1993.
H. Ma, et al., “Novel active differential phase splitters in RFIC for wireless applications,”IEEE Trans. Microwave Theory Tech., vol. 46, Dec. 1998.
M. Rajashekharaiah et al., “A new gain controllable on-chip active balun for 5GHz direct conversion receiver,” 2005IEEE Int. on Circuits and Systems Symp. ISCAS 2005, vol. 5, pp. 5115-5118, May 2005.
M. Goldfarb, et al., “A novel MMIC biphase modulator with variable gain using enhancement-mode FETS suitable for 3 V wireless applications,”1994 IEEE Microwave and Millimeter-Wave Monolithic Circuits Symp., pp. 99-102, May 1994.
H. Koizumi, et al., “A GaAs single balanced mixer MMIC with built-in active balun for personal communication systems,”1995 IEEE Microwave and Millimeter-Wave Monolithic Circuits Symp., pp. 77-80, May 1995.
T. Hiraoka, et al., “A miniaturized broad-band MMIC frequency doubler,”IEEE Trans. on Microwave Theory Tech., vol. 38, pp. 1932-1937, Dec. 1990.
M. Kawashima, et al., “A novel broadband active balun”,33rd European Microwave Conf., vol. 2, pp. 495-498, Oct. 2003.
D. E. Bockelman and W.R. Eisenstadt, “Combined differential-and common mode scattering parameters: Theory and simulation,”IEEE Trans. Microwave Theory Tech., vol. 43, Jul. 1995.
K. Jung, W. R. Eisenstadt, and R. Fox., “Broadband active balun using combined cascode-cascade configuration” Thesis submitted Nov. 9, 2007 based at least in part on Ph.D defense by K. Jung on Oct. 18, 2007.
Eisenstadt William Richard
Fox Robert M.
Jung Kooho
Choe Henry K
Saliwanchik Lloyd & Saliwanchik
University of Florida Research Foundation Inc.
LandOfFree
Broadband active balun does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Broadband active balun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Broadband active balun will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4250077