Title :
Design considerations for high performance very low frequency filters
Author :
Silva-Martinez, José ; Solís-Bustos, Sergio
Author_Institution :
Dept. of Electron., Nat. Inst. of Astrophys. Opt. & Electron., Puebla, Mexico
Abstract :
This paper deals with the design of very low frequency continuous time filters based on Operational Transconductance Amplifiers (OTAs). Design techniques for both high-performance OTAs and large capacitors are presented. Very small transconductance OTAs with low noise levels and small harmonic distortion components are discussed. Large capacitors are implemented by using impedance scalers based on current mirrors. Design strategies and simulated results for a sixth order 1 Hz lowpass filter are presented
Keywords :
capacitance; continuous time filters; harmonic distortion; linear network synthesis; low-pass filters; operational amplifiers; 1 Hz; OTA; active filters; continuous time filters; current mirrors; design techniques; harmonic distortion; high performance VLF filters; impedance scalers; large capacitor implementation; low noise levels; operational transconductance amplifiers; sixth order lowpass filter; very low frequency filters; Capacitance; Capacitors; Frequency conversion; Harmonic distortion; Impedance; Noise level; Optical filters; Silicon; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780848
