Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2005-09-06
2005-09-06
Nguyen, Simon (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S246100, C455S251100, C375S345000
Reexamination Certificate
active
06941121
ABSTRACT:
A method for measuring a difference in DC offsets associated with different gain settings in a direct conversion receiver having a variable gain is provided. In a first phase, a set of response parameters that characterize a time-dependent system response to a known change in the DC offset is determined. Each response parameter corresponds to the response measured at a different time after the change. In a second phase, different gain settings are applied to the system and the response is measured at times corresponding to the times associated with each of the response parameters. The response parameters are then used to determine the difference in DC offsets associated with the different gain settings.
REFERENCES:
patent: 4612585 (1986-09-01), Takase et al.
patent: 4766497 (1988-08-01), Banach et al.
patent: 5745838 (1998-04-01), Tresness et al.
patent: 6031432 (2000-02-01), Schreuders
patent: 6321073 (2001-11-01), Luz et al.
patent: 6442380 (2002-08-01), Mohindra
patent: 6498929 (2002-12-01), Tsurumi et al.
patent: 6654593 (2003-11-01), Simmons et al.
patent: 6711393 (2004-03-01), Stenstrom et al.
patent: 6735422 (2004-05-01), Baldwin et al.
patent: 6771945 (2004-08-01), Pickett et al.
patent: 2003/0207674 (2003-11-01), Hughes
patent: 0594894 (1992-10-01), None
Liu T. and Westerwick, E., “5-GHz CMOS Radio Transceiver Front-End Chipset”,IEEE Journal of Solid-State Circuits, vol. 35, No. 12, Dec. 2000, pp. 1927-1941.
Steyaert et al., “A 2-V CMOS Cellular Transceiver Front-End”,IEEE Journal of Solid-State Circuits, vol. 35, No. 12, Dec. 2000, pp. 1895-1907.
Lam, C. and Razavi, B., “A 2.6-GHz/5.2-GHz Frequency Synthesizer in 0.4-μm CMOS Technology”,IEEE Journal of Solid-State Circuits, vol. 35, No. 5, May 2000, pp. 788-794.
Rategh et al., “A CMOS Frequency Synthesizer with an Injection-Locked Frequency Divider for a 5-GHz Wireless LAN Receiver”,IEEE Journal of Solid-State Circuits, vol. 35, No. 5, May 2000, pp. 780-787.
Samavati et al., “A 5-GHz CMOS Wireless LAN Receiver Front End”,IEEE Journal of Solid-State Circuits, vol. 35, No. 5, May 2000, pp. 765-772.
Razavi, B.,RF Microelectronics, Prentice Hall PTR, 1997, pp. 129-133.
Namgoong, W. and Meng, T., “Direct-Conversion RF Receiver Design,” IEEE Transactions on Communications, vol. 49, No. 3, Mar. 2001, pp. 518-529.
Haspeslagh D. et al., “BBTRX: A Baseband Transceiver for a Zero IF GSM Hand Portable Station,” IEEE Custom Integrated Circuits Conference, Boston, MA, 1992, pp. 10.7.1-10.7.4.
Nguyen Simon
RF Micro Devices, Inc.
Withrow & Terranova , PLLC
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