Title :
A 100MHz 7th-order gm-C filter with a wide-range transconductance amplifier
Author :
Choi, Joongho ; Min, Sunki ; Kim, Chunsuk
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Seoul, South Korea
Abstract :
This paper describes the gm-C filter design with the proposed wide-range transconductance amplifier. The transconductance amplifier includes the auxiliary positive feedback differential pair to enhance the operating range with small variation of gm value. The 100MHz 7th-order 0.05° equiripple linear-phase lowpass filter is designed in a 0.35-μm CMOS technology. The 3-dB frequency can be finely programmed and maintained through on-chip tuning PLL. The filter operates at the single power supply voltage of 3.3V.
Keywords :
CMOS analogue integrated circuits; VHF filters; active filters; circuit tuning; differential amplifiers; equiripple filters; feedback amplifiers; linear phase filters; low-pass filters; programmable filters; wideband amplifiers; 0.35 micron; 100 MHz; 3.3 V; 7th -order gm-C filter; CMOS technology; equiripple linear-phase low-pass filter; on-chip tuning PLL; positive feedback differential pair; programmable circuit; wide-range transconductance amplifier; CMOS technology; Differential amplifiers; Feedback; Filters; Frequency; Phase locked loops; Power supplies; Transconductance; Tuning; Voltage;
Conference_Titel :
Circuits and Systems, 2002. MWSCAS-2002. The 2002 45th Midwest Symposium on
Print_ISBN :
0-7803-7523-8
DOI :
10.1109/MWSCAS.2002.1186989
