A sigma-delta modulator as an A/D converter
Abstract
A sigma-delta modulator system is discussed as an alternative to the dual-slope converter. A simple auto-zero circuit and cold switching of the gain setting can be obtained. The implementation of the analog system in the form of two bipolar IC's offers an attractive application as a multi-input data acquisition system with a scanning capability. A combination with a D/A converter increases the resolution with a small increase in conversion time. Hardly any accurate elements are required in this application if the dynamic element matching method is used in the D/A converter.
- Publication:
-
IEEE Transactions on Circuits Systems
- Pub Date:
- July 1978
- Bibcode:
- 1978ITCS...25..510V
- Keywords:
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- Analog To Digital Converters;
- Bipolar Transistors;
- Delta Modulation;
- Integrated Circuits;
- Pulse Modulation;
- Analog Circuits;
- Block Diagrams;
- Comparator Circuits;
- Data Acquisition;
- Digital To Analog Converters;
- Inverted Converters (Dc To Ac);
- Metal Oxide Semiconductors;
- Operational Amplifiers;
- Voltage Converters (Dc To Dc);
- Electronics and Electrical Engineering