Sigma-delta versus oscillator-based converters in low-cost accurate sensor systems

Author

Van der Goes, Frank M L ; Meijer, Gerard C M

Author_Institution

Electron. Res. Lab., Delft Univ. of Technol., Netherlands

Volume

2

fYear

1996

fDate

1996

Firstpage

1151

Abstract

Indirect Analog-to-Digital (A/D) converters have proven to be very suitable for use in sensor systems. Two different types of indirect converters can be distinguished: synchronous converters (such as Delta-Sigma converters) and asynchronous converters (such as converters based on free-running oscillators). This paper discusses the differences between both types for the use in low-cost sensor systems. It is concluded that the converter which is based on an asynchronous modulator is for some aspects superior to a Delta-Sigma converter and can be regarded as the optimal converter for use in low-cost sensor systems

Keywords

analogue-digital conversion; circuit feedback; feedback oscillators; intelligent sensors; modulators; quantisation (signal); sigma-delta modulation; asynchronous converters; asynchronous modulator; delta-sigma converters; digital interference; feedback loop; free-running oscillators; indirect ADC; low-cost accurate sensor systems; microcontroller effort; optimal converter; oscillator-based converters; quantisation noise; resolution; sigma-delta converters; smart sensor systems; synchronous converters; Analog-digital conversion; Clocks; Costs; Delta-sigma modulation; Feedback loop; Microcontrollers; Packaging machines; Sensor systems; Signal resolution; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings. Quality Measurements: The Indispensable Bridge between Theory and Reality., IEEE

Conference_Location

Brussels

Print_ISBN

0-7803-3312-8

Type

conf

DOI

10.1109/IMTC.1996.507552

Filename

507552