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

Volume

2

fYear

1999

fDate

36342

Firstpage

648

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCAS.1999.780848

Filename

780848