Amplifiers – With amplifier condition indicating or testing means
Reexamination Certificate
2006-12-26
2006-12-26
Nguyen, Patricia (Department: 2817)
Amplifiers
With amplifier condition indicating or testing means
C330S277000, C330S051000
Reexamination Certificate
active
07154329
ABSTRACT:
An amplifier circuit includes a calibration circuit with a controllable circuit element such as a digital resistor. One or more properties of the controllable circuit element (e.g., the resistance in a digital resistor) is varied by a digital calibration word such that the voltage drop across the resistor matches a reference voltage. The calibration word is also used to control the resistance of a transistor that forms a part of a power amplifier to compensate for temperature and process variations. The amplifier may be a switching power amplifier, and the transistor may be a segmented transistor with the width (and hence the channel resistance) controlled by the digital calibration word.
REFERENCES:
patent: 4534040 (1985-08-01), Thapar
patent: 4580111 (1986-04-01), Swanson
patent: 4638190 (1987-01-01), Hwang et al.
patent: 4734751 (1988-03-01), Hwang et al.
patent: 4804931 (1989-02-01), Hulick
patent: 4864162 (1989-09-01), Maoz
patent: 4901032 (1990-02-01), Komiak
patent: 4947136 (1990-08-01), Helms
patent: 4947455 (1990-08-01), Swanson
patent: 4952890 (1990-08-01), Swanson
patent: 5049841 (1991-09-01), Cooper et al.
patent: 5268658 (1993-12-01), Edwards
patent: 5367272 (1994-11-01), Hulick
patent: 5392007 (1995-02-01), Cripe
patent: 5450044 (1995-09-01), Hulick
patent: 5469127 (1995-11-01), Hulick et al.
patent: 5621351 (1997-04-01), Puri et al.
patent: 5867071 (1999-02-01), Chethik
patent: 5886573 (1999-03-01), Kolanek
patent: 6041082 (2000-03-01), Takeda et al.
patent: 6130910 (2000-10-01), Anderson et al.
patent: 6147553 (2000-11-01), Kolanek
patent: 6255906 (2001-07-01), Eidson et al.
patent: 6377784 (2002-04-01), McCune
patent: 6411655 (2002-06-01), Holden et al.
patent: 6586989 (2003-07-01), Perner et al.
patent: 6590413 (2003-07-01), Yang
patent: 6636112 (2003-10-01), McCune
patent: 6658238 (2003-12-01), Ursenbach et al.
patent: 6738432 (2004-05-01), Pehlke et al.
patent: 6791417 (2004-09-01), Pengelly et al.
patent: 6799020 (2004-09-01), Heidmann et al.
patent: 6816008 (2004-11-01), Kontson
patent: 6930552 (2005-08-01), Miyagi
patent: 2005/0030104 (2005-02-01), Chen et al.
patent: 2005/0114111 (2005-05-01), Zhang et al.
King-Chun Tsai and Paul R. Gray, “A 1.9-GHz, 1-W CMOS Class-E Power Amplifier for Wireless Communications”; IEEE Journal of Solid-State Circuits, vol. 34, No. 7, Jul. 1999, pp. 962-970.
Nathan O. Sokal, WA1HQC of Design Automation, Inc., ARRL Technical Advisor. “Class-E RF Power Amplifiers”; QEX Jan./Feb. 2001, pp. 9-20.
Richard C. Jaeger, Auburn University, “Tutorial: Analog Data Aquisition Technology, Part-II-Analog-to-Digital Conversion”; IEEE Micro, Aug. 1982, pp. 46-56.
C. K. T. Chan and C. Toumazou, “Linear Class E Power Amplifier for mobile communications”; http://infoeng.ee.ic.ac.uk/www—section/students/thomaschan/ClassEPA.html, Mar. 22, 2004.
George J. Krausse, Directed Energy, Inc., “IKW Class-E 13.56MHz Single Device RF Generator for Industrial Applications”; 2000 Directed Energy, Inc., Doc. #9300-0001 Rev 1, pp. 1-16.
The Official Class E Transmitter Web Site by WA1Q1X, “Class E AM Transmitter Descriptions, Circuits, Etc.[Updated Jan. 29, 2004]”; http://www.classradio.com/, Apr. 26, 2004 (25 pages).
Jingshi Yao, Tony Long and Stephen I. Long, “High Efficiency Switch Mode Amplifiers for Mobile and Base Station Applications”; Department of Electrical and Computer Engineering, University of California, Final Report 2000-2001 for MICRO Project 00-061 (4 pages).
Ahmadreza Rofougaran, Glenn Chang, Jacob J. Rael, James Y.-C. Chang, Maryam Rofougaran, Paul J. Chang, Masoud Djafari, M.-K. Ku, Edward W. Roth, Asad A. Abidi and Henry Samueli; “A Single-Chip 900 MHz Spread-Sprectrum Wireless Transceiver in 1-βm CMOS—Part 1: Architecture and Transmitter Design”; IEEE Journal of Solid-State Circuits, vol. 33, No. 4, Apr. 1998.
M. Rofougaran, A. Rofougaran, C. Olgaard, and A. A. Abidi; “A 900 MHz CMOS RF Power Amplifier with Programmable Output”, 1994 Symposium on VLSI Circuits Digest of Technical Papers.
M/A-COM, Inc.
Nguyen Patricia
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