Digitally programmable MOS resistive circuit

Author

Alarcón, E. ; Martínez, H. ; Vidal, E. ; Poveda, A.

Author_Institution

Dept. of Electron. Eng., Univ. Politecnica de Catalunya, Barcelona, Spain

Volume

38

Issue

1

fYear

2002

fDate

1/3/2002 12:00:00 AM

Firstpage

11

Lastpage

13

Abstract

A mixed-signal cell is presented which operates as a digitally-controlled differential resistor and is suited to programmable continuous-time MOSFET-C filter applications. The cell is based on a digitally-controlled extension of the MOS resistive circuit (MRC) cell, in which digital tunability is obtained by embedding in the MRC transistors both the triode-region and switch functionalities, providing a compact implementation that preserves circuit performance. Post-layout simulation results for a 3-bit prototype in 0.8 μm CMOS technology validate the feasibility of the proposed cell and its application to a digitally-tunable continuous-time MOSFET-C filter

Keywords

CMOS integrated circuits; Q-factor; band-pass filters; circuit tuning; continuous time filters; mixed analogue-digital integrated circuits; programmable circuits; programmable filters; CMOS technology; Q-factor; aspect-ratio binary-weighted transistors; bandpass filter; biased digital inverters; compact implementation; differential transconductor; digital tunability; digitally programmable MOS resistive circuit; digitally-controlled differential resistor; functionalities; mixed-signal cell; mixed-signal controllability; post-layout simulation; programmable continuous-time MOSFET-C filter; switch functionalities; triode-region;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20020016

Filename

977525