Title :
A programmable low-pass filter with adaptive miller compensation for zero-IF transceiver
Author :
Gao, Jia ; Jiang, Hanjun ; Zhang, Lingwei ; Dong, Jingjing ; Wang, Zhihua
Author_Institution :
Tsinghua Nat. Lab. for Inf. Sci. & Technol., Tsinghua Univ., Beijing, China
Abstract :
A programmable active-RC low-pass filter is presented with tunable bandwidth realized with a fast tuning circuit suited for a zero-IF transceiver. The filter adopts a 3rd-order Bessel low-pass architecture. Its -3dB bandwidth can be programmed to 250K, 500K, 1M and 2MHz.An operational amplifier with adaptive Miller compensation is designed to maintain the stability of the circuit when the filter is configured to work under different frequency bands. An on-chip automatic frequency tuning circuit is designed to compensate for the errors in on-chip resistance and capacitance caused by process, voltage and temperature variations. The circuit is designed in a 0.18-μm CMOS technology and the overall current consumption is 0.98mA with a supply voltage of 1.8V. The IIP3 is 26.5dBm and the fast automatic tuning requires only 40μs.
Keywords :
CMOS integrated circuits; RC circuits; circuit stability; low-pass filters; operational amplifiers; programmable circuits; transceivers; 3rd-order Bessel low-pass architecture; CMOS technology; adaptive Miller compensation; circuit stability; fast tuning circuit; on-chip automatic frequency tuning circuit; on-chip resistance; operational amplifier; programmable active-RC low-pass filter; programmable low-pass filter; zero-IF transceiver; Band pass filters; Bandwidth; Capacitors; Circuit stability; Low pass filters; Transceivers; Tuning;
Conference_Titel :
Circuits and Systems (MWSCAS), 2012 IEEE 55th International Midwest Symposium on
Conference_Location :
Boise, ID
Print_ISBN :
978-1-4673-2526-4
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2012.6291998
