A 1.2 V BiCMOS companding current-mode integrator for ΣΔ-modulators

Author

Punzenberger, Manfied ; Enz, Christian

Author_Institution

Electron. Lab., Swiss Federal Inst. of Technol., Lausanne, Switzerland

Volume

1

fYear

1996

fDate

13-16 Oct 1996

Firstpage

235

Abstract

A companding current-mode integrator is proposed for very low voltage ΣΔ-converters. Neither the input nor the output current of this integrator is limited by the biasing current as it operates in class AB. This property allows the design of integrators with low biasing current levels and therefore low average power consumption, which are still able to process large signals. The proposed integrator operates at 1.2 V and has a power consumption of 21 μW. It is used as a building block for a first order ΣΔ-converter for voice-band applications

Keywords

BiCMOS analogue integrated circuits; analogue processing circuits; integrating circuits; sigma-delta modulation; ΣΔ-modulators; 1.2 V; 21 muW; BiCMOS companding current-mode integrator; class AB; first order sigma-delta converter; low average power consumption; low biasing current levels; very low voltage converters; voice-band applications; BiCMOS integrated circuits; Bipolar transistors; Capacitors; Circuit optimization; Energy consumption; Equations; Laboratories; Leg; Low voltage; Signal design;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits, and Systems, 1996. ICECS '96., Proceedings of the Third IEEE International Conference on

Conference_Location

Rodos

Print_ISBN

0-7803-3650-X

Type

conf

DOI

10.1109/ICECS.1996.582786

Filename

582786