Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2006-08-22
2006-08-22
Vuong, Quochien B. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S343100, C455S574000, C375S345000, C330S296000
Reexamination Certificate
active
07095994
ABSTRACT:
Baseband receiver circuitry is dynamically biased in a communication system receiver by generating gain control information, and controlling an adjustable bias of at least a portion of the baseband circuitry based at least in part on the gain control information. The baseband receiver circuitry comprises at least one amplifier having an adjustable bias associated therewith, with the adjustable bias of the amplifier being controllable utilizing a bias control signal. For example, the amplifier may be an operational amplifier having a gain stage and an output buffer stage, with the bias control signal being applied to the output buffer stage to control an adjustable bias current thereof. More specifically, the bias control signal may be used to control an amount of current provided by at least one of a plurality of current sources associated with the output buffer stage of the amplifier, for example, by controlling a switch which enables or disables one or more of the current sources. Advantageously, the dynamic bias control can substantially reduce power consumption in the receiver. The techniques of the invention can also be applied to other types of devices which utilize gain control.
REFERENCES:
patent: 5410273 (1995-04-01), Brehmer et al.
patent: 5483691 (1996-01-01), Heck et al.
patent: 5570064 (1996-10-01), Sugawara
patent: 5627857 (1997-05-01), Wilson
patent: 5670912 (1997-09-01), Zocher
patent: 5946607 (1999-08-01), Shiino et al.
patent: 5974095 (1999-10-01), Kitaura et al.
patent: 6154503 (2000-11-01), Strolle
patent: 6175279 (2001-01-01), Ciccarelli et al.
patent: 6181201 (2001-01-01), Black
patent: 6670901 (2003-12-01), Brueske et al.
patent: 6763228 (2004-07-01), Prentice et al.
patent: 6768379 (2004-07-01), Umeda et al.
Maxim QuickView Data Sheet, MAX2700, MAX2701—1.8GHz to 2.5GHz, Direct-Downconversion Receivers, First Direct-Conversion Receiver for Wideband Wireless Local Loop, http://dbserv.maxim-ic.com/quick—view2.cfm?qv—pk=2238, 2 pages, 2001.
Aytur Turgut Sefket
Belk Nathan R.
Lucent Technologies - Inc.
Vuong Quochien B.
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