Title :
A 4 Hz low-pass continuous-time filter
Author :
Solis-Bustos, Sergio ; Silva-Mart, Josk
Author_Institution :
Integrated Circuits Design Group, Nat. Inst. for Astrophys. Opt. & Electron., Puebla, Mexico
Abstract :
This paper deals with the design and implementation of a 6th order 4 Hz low-pass OTA-C filter in a 1.2 μm CMOS analog technology. The linearized 1 nA/V OTAs are implemented by using a CMOS transistor biased in triode region and current cancellation techniques. The capacitors are scaled up by a factor proportional to the ratio of transistor dimensions. These techniques allow us to design ICs with very large time constants. The filter´s dynamic range is 39 dB while the harmonic distortion components are below to -50 dB
Keywords :
CMOS analogue integrated circuits; continuous time filters; harmonic distortion; integrated circuit design; linear phase filters; low-pass filters; operational amplifiers; 1.2 micron; 4 Hz; 6th order filter; CMOS analog technology; OTA-C filter; active filters; current cancellation techniques; dynamic range; harmonic distortion components; low-pass continuous-time filter; operational transconductance amplifier; Active filters; CMOS technology; Capacitors; Diodes; Dynamic range; Frequency; Impedance; Low pass filters; Optical filters; Silicon;
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
DOI :
10.1109/ICECS.1998.813295
