A component-invariant second-order switched-current sigma-delta modulator

Author

Crawly, P.J. ; Roberts, Gordon W.

Author_Institution

Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada

Volume

3

fYear

1992

fDate

10-13 May 1992

Firstpage

1324

Abstract

The authors present the building blocks and design procedure necessary for creating a component-invariant second-order switched current (SI) sigma-delta modulator (ΣΔM). A novel SI second-order integrator block is paramount to the design. A voiceband (4-kHz) analog-to-digital (A/D) converter was designed and laid out in Northern Telecom´s 1.2-μm CMOS process. Final transistor level simulations on the netlist derived directly from the layout indicated a resolution of only 10 b, a result of excessive charge injection and clock feedthrough. The power and area requirements of the SI design are estimated to be 0.2 mW and 0.2 mm², respectively

Keywords

CMOS integrated circuits; analogue-digital conversion; delta modulation; modulators; switched networks; voice communication; 0.2 mW; 1.2 micron; 4 kHz; A/D convertor; ADC; CMOS process; component-invariant; integrator block; monolithic IC; netlist; second-order; sigma-delta modulator; switched-current; transistor level simulations; CADCAM; CMOS process; Circuits; Computer aided manufacturing; Delta-sigma modulation; Signal design; Signal processing; Switches; Telecommunication switching; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1992. ISCAS '92. Proceedings., 1992 IEEE International Symposium on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-0593-0

Type

conf

DOI

10.1109/ISCAS.1992.230260

Filename

230260