Title :
A 4MHz Gm-C filter with on-chip frequency automatic tuning
Author :
Yao, JinKe ; Chi, Baoyong ; Wang, ZhiHua
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
Abstract :
A fifth-order elliptic low-pass Gm-C filter used in monolithic DAB receiver is presented, the filter integrates an on-chip frequency automatic tuning circuit based on PLL to control the cutoff frequency. The filter has been implemented in 0.25muum CMOS process. The measurement results show that the frequency tuning error is within 1%, the dynamic range is 54dB, the stop-band rejection rate is greater than 40dB. The filter draws 13mA current from a 3.3V power supply
Keywords :
CMOS integrated circuits; circuit tuning; digital audio broadcasting; elliptic filters; low-pass filters; microwave filters; radio receivers; 0.25 micron; 13 mA; 3.3 V; 4 MHz; CMOS process; Gm-C filter; elliptic low-pass filter; monolithic DAB receiver; on-chip frequency automatic tuning; phase locked loop; CMOS process; Circuit optimization; Cutoff frequency; Dynamic range; Frequency measurement; Integrated circuit measurements; Low pass filters; Phase locked loops; Power supplies; Tuning;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693459
