A low-power BiCMOS switched-capacitor filter for audio codec applications

Author

Baschirotto, A. ; Brasca, G. ; Montecchi, F. ; Stefani, F.

Author_Institution

Dipt. di Elettronica, Pavia Univ., Italy

Volume

32

Issue

7

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

1127

Lastpage

1131

Abstract

A fully integrated fourth-order filter embedded in a complete 16-b oversampled D/A converter to be used in an audio stereo codec is presented. The possible noise and distortion sources have been accurately evaluated in the design and their contributions have been properly limited. This allows the reduction of the power consumption while satisfying the application requirements. The filter is realized in 0.7-μm BiCMOS technology with an active area of about 1.3 mm². A total harmonic distortion (THD) of -75 dB for a full scale input signal and an SNR of 96 dB have been achieved. The power consumption of the filter has been maintained within about 40 mW from a single 5-V supply voltage

Keywords

BiCMOS analogue integrated circuits; Hi-Fi equipment; codecs; digital-analogue conversion; harmonic distortion; integrated circuit noise; low-pass filters; switched capacitor filters; 0.7 micron; 16 bit; 40 mW; 5 V; 96 dB; BiCMOS switched-capacitor filter; audio codec applications; distortion sources; fourth-order filter; low-power BiCMOS SC filter; noise sources; oversampled D/A converter; power consumption reduction; stereo codec; Band pass filters; BiCMOS integrated circuits; Codecs; Energy consumption; Finite impulse response filter; Frequency; Low pass filters; Power harmonic filters; Signal processing; Total harmonic distortion;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.597304

Filename

597304