Title :
Digitally-controlled Gm-C bandpass filter
Author :
Guanglei Jin ; Hao Chen ; Chuan Gao ; Yunpeng Zhang ; Kobayashi, Hideo ; Takai, N. ; Niitsu, Kiichi ; Hadidi, Khayrollah
Author_Institution :
Dept. of Electron. Eng., Gunma Univ., Kiryu, Japan
Abstract :
This paper describes digital auto-tuning schemes for second-order Gm-C bandpass filters which are suitable for fine CMOS implementation. We propose a switched Gm-C analog filter and two digital tuning schemes: a center frequency tuning scheme using the phase information and a Q factor tuning scheme using the magnitude information. We present circuits, describe their operations, and present SPICE simulation results.
Keywords :
CMOS integrated circuits; Q-factor; SPICE; band-pass filters; CMOS; Q factor tuning scheme; SPICE simulation; center frequency tuning scheme; digital auto-tuning scheme; digital tuning scheme; digitally-controlled Gm-C bandpass filter; magnitude information; phase information; second-order Gm-C bandpass filter; switched Gm-C analog filter; Band pass filters; CMOS integrated circuits; Charge pumps; Phase frequency detector; Q factor; Simulation; Tuning; Auto-tuning; Center-frequency tuning; Gm-C bandpass filter; Q-factor tuning;
Conference_Titel :
Circuits and Systems (APCCAS), 2012 IEEE Asia Pacific Conference on
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1728-4
DOI :
10.1109/APCCAS.2012.6419089
