Combination of ADC & DAC to measure small variation with large standing signal

W.Q. Yang

Combination of ADC & DAC to measure small variation with large standing signal

EEE - Academic & Research

Research output: Chapter in Book/Conference proceeding › Conference contribution › peer-review

Abstract

In some cases, the variation of a signal is small compared with the standing signal level. It is difficult to measure small variation with a large standing signal. One method of achieving more accurate measurement is to cancel the standing signal first, and then measure the variation alone. This paper presents a circuit combining analogue-to-digital converter (ADC) with digital-to-analogue converter (DAC), to cope with this particular problem. Two DACs are used, one providing an offset voltage for standing signal compensation and another as a programmable gain amplifier (PGA). An equation is derived for calculation of the absolute signal from the measured data. Experimental results are shown.

Original language	English
Title of host publication	IEE Conference Publication
Publication status	Published - 1999
Event	1999 Third International Conference on Advanced A/D and D/A Conversion Techniques and their Applications - Glasgow, United Kingdom Duration: 27 Jul 1999 → 28 Jul 1999 Conference number: 55901

Conference

Conference	1999 Third International Conference on Advanced A/D and D/A Conversion Techniques and their Applications
Country/Territory	United Kingdom
City	Glasgow
Period	27/07/99 → 28/07/99

Keywords

Amplifiers (electronic)
Approximation theory
Digital to analog conversion
Gain measurement
Mathematical models
Signal processing

Cite this

@inproceedings{e7705e59af8d484f91226421b9251373,

title = "Combination of ADC & DAC to measure small variation with large standing signal",

abstract = "In some cases, the variation of a signal is small compared with the standing signal level. It is difficult to measure small variation with a large standing signal. One method of achieving more accurate measurement is to cancel the standing signal first, and then measure the variation alone. This paper presents a circuit combining analogue-to-digital converter (ADC) with digital-to-analogue converter (DAC), to cope with this particular problem. Two DACs are used, one providing an offset voltage for standing signal compensation and another as a programmable gain amplifier (PGA). An equation is derived for calculation of the absolute signal from the measured data. Experimental results are shown.",

keywords = "Amplifiers (electronic), Approximation theory, Digital to analog conversion, Gain measurement, Mathematical models, Signal processing",

author = "W.Q. Yang",

year = "1999",

language = "English",

isbn = "0852967187",

booktitle = "IEE Conference Publication",

note = "1999 Third International Conference on Advanced A/D and D/A Conversion Techniques and their Applications <br/> ; Conference date: 27-07-1999 Through 28-07-1999",

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TY - GEN

T1 - Combination of ADC & DAC to measure small variation with large standing signal

AU - Yang, W.Q.

N1 - Conference code: 55901

PY - 1999

Y1 - 1999

N2 - In some cases, the variation of a signal is small compared with the standing signal level. It is difficult to measure small variation with a large standing signal. One method of achieving more accurate measurement is to cancel the standing signal first, and then measure the variation alone. This paper presents a circuit combining analogue-to-digital converter (ADC) with digital-to-analogue converter (DAC), to cope with this particular problem. Two DACs are used, one providing an offset voltage for standing signal compensation and another as a programmable gain amplifier (PGA). An equation is derived for calculation of the absolute signal from the measured data. Experimental results are shown.

AB - In some cases, the variation of a signal is small compared with the standing signal level. It is difficult to measure small variation with a large standing signal. One method of achieving more accurate measurement is to cancel the standing signal first, and then measure the variation alone. This paper presents a circuit combining analogue-to-digital converter (ADC) with digital-to-analogue converter (DAC), to cope with this particular problem. Two DACs are used, one providing an offset voltage for standing signal compensation and another as a programmable gain amplifier (PGA). An equation is derived for calculation of the absolute signal from the measured data. Experimental results are shown.

KW - Amplifiers (electronic)

KW - Approximation theory

KW - Digital to analog conversion

KW - Gain measurement

KW - Mathematical models

KW - Signal processing

UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-0033356374&partnerID=MN8TOARS

M3 - Conference contribution

SN - 0852967187

SN - 0537-9989

BT - IEE Conference Publication

T2 - 1999 Third International Conference on Advanced A/D and D/A Conversion Techniques and their Applications <br/>

Y2 - 27 July 1999 through 28 July 1999

ER -

Combination of ADC & DAC to measure small variation with large standing signal

Abstract

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Keywords

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Cite this