Dual slope converter with large apparent integrator swing

Details Dual slope converter with large apparent integrator swing Dual slope converter with large apparent integrator swing

1985-10-07

1987-04-07

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

324 99D, 340347AD, 340347CC, 364483, H03M 150

Patent

active

046564594

ABSTRACT:
Conversion is achieved by subdividing the intergrate and deintegrate periods into a plurality of integrate and deintegrate phases. Power frequency rejection can be maintained by defining the combined integrate phases to integrate over at least one complete power line cycle. Sychronization of the integrate phases with the power line cycle is maintained by separating integrate phases with a combined deintegrate and rest phase of fixed duration.

REFERENCES:
patent: 3316547 (1967-04-01), Ammann
patent: 3879724 (1975-04-01), McDonald
patent: 4556867 (1985-12-01), George
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/1972, pp. II-48 to II-51.
Mitchell et al., Data Averager for Panel Meter Operates from Meter's Clock, Electronics, V. 46, No. 9, Apr. 26, 1973, p. 103.
"Numerical-Integration Techniques Speed Dual-Slope A/D Conversion" by Gary Grandbois and Wes Freeman, 147-154 EDN, Oct. 31, 1984.
"A Charge-Balancing Monolithic A/D Converter" George F. Landsburg, I.E.E.E. J. Solid-State Circuits, 662-673, Dec. 1977.
"Quantized Feedback Takes its Place in Analog-to-Digital Conversion" by Gary Grandbois and Ted Pickerell, Electronics, 10-13-77, 103-107.
Intersil Data Sheets: "A017 3, the Integrating A/D Converter"; ICL 7129, 41/2 Digit Single-Chip A/D Converter.

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