Integrated continuous-time balanced filters for 16-b DSP interfaces

Author

Durham, Anna M. ; Redman-White, William

Author_Institution

Dept. of Electron. & Comput. Sci., Southampton Univ., UK

Volume

28

Issue

7

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

835

Lastpage

839

Abstract

A fully integrated, low-distortion, balanced, continuous-time filter fabricated in 5-V, 1.6-μm CMOS is presented. Active RC structures are used in a leapfrog topology, with time constants set by integrated passive resistors and capacitors. Accurate tuning is achieved by selection of capacitor elements under the control of a new calibrator circuit. With a 2-V_rms differential input and output, the filter achieves -94-dB THD (total harmonic distortion) and 95-dB signal-to-noise ratio. Tuning accuracy is maintained to within ±5% of nominal over the commercial temperature range

Keywords

CMOS integrated circuits; active filters; calibration; linear integrated circuits; tuning; 1.6 micron; 5 V; 95 dB; CMOS; DSP interfaces; SNR; THD; active RC structures; calibrator circuit; capacitor elements; continuous-time balanced filters; integrated passive resistors; leapfrog topology; low-distortion; total harmonic distortion; tuning; Capacitors; Circuit optimization; Digital signal processing; Filters; Frequency; Linearity; Resistors; Switches; Switching circuits; Tuning;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.222184

Filename

222184