Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2006-02-21
2006-02-21
Urban, Edward F. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S323000, C455S234100, C375S344000, C375S343000, C375S350000
Reexamination Certificate
active
07003271
ABSTRACT:
In a direct conversion radio frequency receiver, an automatic gain control is implemented that allows changing the operation mode of a filter unit in the baseband section of the receiver such that in a first operation mode filter capacities are selected to provide desired output signal characteristics, whereas in a second operation mode the filter settling time is significantly reduced in order to speed up gain adaptation and to improve gain loop stability. In one embodiment the cut-off frequency of a high pass filter and the Q-factor of a subsequent low pass filter are increased and decreased respectively upon changing the gain setting of a variable gain amplifier to accelerate settling of the filter.
REFERENCES:
patent: 5095533 (1992-03-01), Loper et al.
patent: 5151939 (1992-09-01), Marrah et al.
patent: 5257286 (1993-10-01), Ray
patent: 6006079 (1999-12-01), Jaffee et al.
patent: 6335656 (2002-01-01), Goldfarb et al.
patent: 6356746 (2002-03-01), Katayama
patent: 6512472 (2003-01-01), Smith et al.
patent: 2003/0125000 (2003-07-01), Gharpurey et al.
patent: 19933266 (1999-07-01), None
patent: 10131676 (2001-06-01), None
patent: 0722627 (1996-02-01), None
patent: 1083668 (2001-03-01), None
patent: 1102413 (2001-05-01), None
patent: 1113577 (2001-07-01), None
patent: 00/72441 (2000-11-01), None
patent: 01/37436 (2001-05-01), None
patent: 01/47105 (2002-06-01), None
“A Single-Chip 2.4-Ghz Direct-Conversion CMOS Receiver for Wireless Local Loop Using Multiphase Reduced Frequency Conversion Technique”, Lee, et al,IEEE Journal of Solid State Circuits, ISSN: 0018-9200, vol. 36, May 2001, p. 800-809.
“Future Directions in Silicon ICs for RF Personal Communications”, Gray, et al,Custom Integrated Circuits Conference, 1995, Proceedings of the IEEE, May 4, 1995, Santa Clara, CA, p. 83-90.
Translation of Official Communication for German Patent Application No.: 102 19 362.2-35, Mailed Aug. 30, 2005.
Dathe Lutz
Hönig Jörg
Kluge Wolfram
Advanced Micro Devices , Inc.
Chow Charles
Kivlin B. Noäl
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Urban Edward F.
LandOfFree
Direct conversion receiver having a gain-setting dependent... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Direct conversion receiver having a gain-setting dependent..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct conversion receiver having a gain-setting dependent... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3636984