A continuous-time current-mode integrator

Author

Lee, Sang-Soo ; Zele, Rajesh H. ; Allstot, David J. ; Liang, Guojin

Author_Institution

Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

38

Issue

10

fYear

1991

fDate

10/1/1991 12:00:00 AM

Firstpage

1236

Lastpage

1238

Abstract

The authors propose a continuous-time current-mode integrator that offers potential advantages for both higher frequency and lower power monolithic filtering applications. Owing to the small voltage swings inherent in current-mode circuits, the integrator time constant is determined by a small-signal transconductance and an additional MOSFET gate capacitance, while good linearity is maintained using a standard 2-μm digital CMOS technology. Simulation results predict passband cutoff frequencies exceeding 30 MHz for a five-pole low-pass filter dissipating as little as 2 mW/pole with a 5-V power supply

Keywords

CMOS integrated circuits; active filters; integrating circuits; low-pass filters; 2 micron; MOSFET gate capacitance; continuous-time current-mode integrator; digital CMOS technology; five-pole low-pass filter; linearity; monolithic filtering applications; passband cutoff frequencies; small-signal transconductance; voltage swings; CMOS technology; Capacitance; Current mode circuits; Filtering; Frequency; Linearity; MOSFET circuits; Power filters; Transconductance; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems, IEEE Transactions on

Publisher

ieee

ISSN

0098-4094

Type

jour

DOI

10.1109/31.97547

Filename

97547