Amplifiers – With semiconductor amplifying device – Including particular biasing arrangement
Reexamination Certificate
2005-06-14
2005-06-14
Choe, Henry (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including particular biasing arrangement
C330S311000
Reexamination Certificate
active
06906594
ABSTRACT:
A method for extending the linear range of operation of an amplifier includes monitoring a transistor voltage of a transistor of an amplifier. The transistor is coupled to a variable current source applying a bias current to the transistor. The method continues by monitoring an output voltage of the amplifier and by determining whether the transistor voltage is within a predetermined range of the output voltage. If the transistor voltage is not within a predetermined range of the output voltage, the method continues by decreasing the bias current applied to the transistor. If the transistor voltage is within a predetermined range of the output voltage and if the bias current has not previously been decreased, the method continues by increasing the bias current applied to the transistor.
REFERENCES:
patent: 5923215 (1999-07-01), Hans
patent: 6023196 (2000-02-01), Ashby et al.
patent: 6492869 (2002-12-01), Kuriyama
patent: 6756852 (2004-06-01), Chen
patent: 6791418 (2004-09-01), Luo et al.
patent: 2003/0038679 (2003-02-01), Schaffer
patent: 0 534 007 (1991-09-01), None
“The Relationship of Intercept Points and Composite Distortions,” Matrix Technical Notes MTN-109,Matrix Test Equipment 90-11,http://www.matrixtest.com @ Internet, Feb. 18, 1998 (printed Mar. 17, 2003), 6 pages.
“Some Notes on Composite Second and Third Order Intermodulation Distortions,” Matrix Technical Notes MTN-108,Matrix Test Equipment 90-11,http://www.matrixtest.com @ Internet, Dec. 15, 1998, (printed Mar. 17, 2003), 12 pages.
“Derivation for 2nd-order intercept point for two cascaded stages,”Arden Technologies, Inc.,2000, 1 page.
“Derivation for 3rd-order intercept point for two cascaded stages,”Arden Technologies, Inc.,2000, 1 page.
Stephan Van Fleteren, “Merits of Solid State Power Amplifiers and Traveling Wave Tubes Amplifiers for Satellite Communication Applications,”Communications and Power Industries,http://www.cpii.com @ Internet, 2000 (printed Feb. 24, 2003), 4 pages.
“Third Order Intercept Measurements,”Agilent Technologies, Feb. 15, 2001, 7 pages.
Thomas Weldon, “Cascade Analysis” presentation,Thomas Weldon, University of North Carolina at Charlotte,2002.11 pages.
“Mathematical Definitions and Derivations—Intermodulation Calculations,” http://www.ardentech.com @ Internet, printed Mar. 17, 2003, 4 pages.
“AMF Amplifier Products,” http://www.miteq.com @ Internet, printed Mar. 17, 2003, 2 pages.
PCT Search Report for PCT/US2004/016807, 14 pages.
Baker & Botts L.L.P.
Choe Henry
Microtune ( Texas), L.P.
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