Title :
Dynamically power-optimized channel-select filter for zero-IF GSM
Author :
Ozgun, Mehmet ; Tsividis, Yannis ; Burra, Gangadhar
Author_Institution :
Columbia Univ., New York, NY, USA
Abstract :
A 1.2 V channel-select filter is implemented in a 0.18 μm digital CMOS process for a zero-IF GSM system. The filter includes a coarse AGC system with dynamic impedance scaling and dynamic biasing to optimize power consumption, which is scaled down in 5 steps from 2.6 mW to 0.45 mW per channel without introducing transients due to the changes. The area per channel is 1.2 mm2.
Keywords :
CMOS digital integrated circuits; Chebyshev filters; RC circuits; active filters; automatic gain control; cellular radio; digital radio; electric impedance; integrated circuit design; low-pass filters; power consumption; 0.18 micron; 1.2 V; 2.6 to 0.45 mW; Chebyshev filter; Chebyshev-I low-pass leapfrog filter; active filters; active-RC filter; channel-select filter; coarse AGC system; digital CMOS process; dynamic biasing; dynamic impedance scaling; low-pass filter; noise floor; power consumption optimization; transients; zero-IF GSM; Active filters; Band pass filters; Capacitors; Circuit noise; Dynamic range; Energy consumption; GSM; Impedance; Noise reduction; Signal to noise ratio;
Conference_Titel :
Solid-State Circuits Conference, 2005. Digest of Technical Papers. ISSCC. 2005 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-8904-2
DOI :
10.1109/ISSCC.2005.1494090
