Title :
A 500 MHz OTA-C 4th order lowpass filter with class AB CMFB in 0.35 μm CMOS technology
Author :
Pandey, Pankaj ; Silva-Martinez, Jose ; Liu, Xuemei
Author_Institution :
Analog & Mixed Signal Center, Texas A&M Univ., College Station, TX, USA
Abstract :
A 500 MHz linear phase low-pass continuous-time filter is designed. A common-mode feedback (CMFB), based on a class AB amplifier with improved stability at high frequencies, is introduced. The filter is based on Gm-C biquads and achieves IM3<-40 dB for a two-tone input signal of -10 dBm each. The power consumption of the 4th order filter is 140 mW from supply voltages of +/- 1.65 V. The chip was fabricated in a standard 0.35 μm CMOS technology.
Keywords :
CMOS analogue integrated circuits; UHF filters; biquadratic filters; circuit feedback; circuit stability; continuous time filters; differential amplifiers; low-pass filters; operational amplifiers; 0.35 micron; 1.65 V; 140 mW; 500 MHz; CMOS; Gm-C biquadratic filters; OTA-C; class AB amplifier; common-mode feedback; complementary differential pairs; fourth-order filter; high-frequency closed loop stability; linear phase continuous-time filter; lowpass filter; CMOS technology; Capacitors; Circuit simulation; Filters; Frequency; Impedance; Parasitic capacitance; Topology; Transconductance; Voltage;
Conference_Titel :
Custom Integrated Circuits Conference, 2004. Proceedings of the IEEE 2004
Print_ISBN :
0-7803-8495-4
DOI :
10.1109/CICC.2004.1358734
