Title :
A 150 MHz continuous-time seventh order 0.05° equiripple linear phase filter with automatic tuning system
Author :
López-Martinez, Adan ; Antonio-Chávez, Regina ; Silva-Martinez, Jose
Author_Institution :
Dept. of Electron., Nat. Inst. for Res. in Astrophys., Puebla, Mexico
Abstract :
A full CMOS 150 MHz linear phase low-pass filter is discussed. An Operational Transconductance Amplifier (OTA) based on complementary differential pairs is used to achieve high-frequency operation. A common-mode feedback (CMFB) which ensures stability at high frequencies is introduced. The filter is based on gm-C biquads, and its inaccuracies are compensated by using a very simple automatic tuning system. Simulation results in a 0.35 μm CMOS process have shown group delay ripple of 3% for frequencies up to 180 MHz, while the power consumption is only 37 mW
Keywords :
CMOS analogue integrated circuits; VHF filters; circuit feedback; circuit stability; circuit tuning; continuous time filters; linear phase filters; low-pass filters; operational amplifiers; 0.35 micron; 150 to 180 MHz; 37 mW; CMOS low-pass filter; OTA; VHF operation; automatic tuning system; common-mode feedback; complementary differential pairs; continuous-time filter; gm-C biquads; high-frequency operation; linear phase filter; operational transconductance amplifier; seventh order filter; stability; CMOS process; Differential amplifiers; Feedback; Frequency; Low pass filters; Nonlinear filters; Operational amplifiers; Stability; Transconductance; Tuning;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921814
