A programmable 1.8-18 MHz high-Q fully-differential continuous-time filter with 1.5-2 V power-supply

Author

Nabicht, Joseph T. ; Sánchez-Sinencio, Edgar ; Ramírez-Angulo, Jaime

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

5

fYear

1994

fDate

30 May-2 Jun 1994

Firstpage

653

Abstract

A simple CMOS current-mode filter is presented. Its basic building block is a transconductor. It is comprised of a MOS transistor driver operating in the triode region cascoded with a MOS transistor current source at the output. This circuit can be employed in high-frequency continuous-time current-mode filters using a ±1 V power supply while dissipating less than 1 mW of power. To illustrate the methodology a second-order fully-differential bandpass filter with programmable f ₀ and Q tuning is demonstrated. This filter dissipates less than 0.5 mW/pole with a ±1 V power supply and occupies an area of 0.6 mm² using a MOSIS Orbit 2 μm CMOS technology

Keywords

CMOS analogue integrated circuits; band-pass filters; circuit tuning; continuous time filters; programmable filters; 0.5 mW; 1.5 to 2 V; 1.8 to 18 MHz; 2 micron; CMOS current-mode filter; MOS transistor driver; MOSIS Orbit technology; cascoded current source; low power design; programmable high-frequency high-Q continuous-time filter; second-order fully-differential bandpass filter; transconductor; triode; tuning; Band pass filters; CMOS technology; Circuits; MOSFETs; Portable computers; Power supplies; Threshold voltage; Transconductance; Transconductors; Virtual colonoscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on

Conference_Location

London

Print_ISBN

0-7803-1915-X

Type

conf

DOI

10.1109/ISCAS.1994.409457

Filename

409457