Title :
A design of a low-power, high-accuracy, and constant-Q-tuning continuous-time bandpass filter
Author :
Pham, Tien K. ; Allen, Phillip E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
This paper presents a methodology to design low-power continuous-time integrated filters for high-performance wireless applications such as Personal Communication System (PCS), Personal Digital Cellular (PDC), or Wideband Code-Division Multiple Access (WCDMA) handsets. Techniques to enhance the performance of integrated filters by reducing the excess-phase as well as the feature for constant-Q tuning is introduced. In conjunction with the design of a low-power bandpass filter (BPF), a proposal of a high-accuracy and high-speed automatic tuning scheme is also presented. A twelfth-order 450-kHz Gm-C BPF is designed and fabricated using 0.25 μm CMOS technology. The BPF consumes 2.4 mA from a 3-V power-supply. The tuning range is from 300 kHz to 675-kHz. The total area-consumption is approximately 2.34 mm2.
Keywords :
CMOS analogue integrated circuits; Q-factor; band-pass filters; circuit tuning; continuous time filters; integrated circuit design; integrated circuit noise; linear network synthesis; low-power electronics; radiofrequency filters; 0.25 micron; 2.4 mA; 3 V; 300 to 675 kHz; 450 kHz; CMOS technology; PCS handsets; PDC handsets; WCDMA handsets; active filters; constant-Q tuning; continuous-time integrated filters; high-performance wireless applications; high-speed automatic tuning scheme; low-power bandpass filter; low-power integrated filters; noise optimization; twelfth-order band pass filter; Active filters; Application software; Band pass filters; CMOS technology; Circuit topology; Design engineering; Design methodology; Digital filters; Multiaccess communication; Personal communication networks;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010537
