Successive approximation type analog/digital converter and...

Details Successive approximation type analog/digital converter and... Successive approximation type analog/digital converter and...

2011-04-12

2011-04-12

Lauture, Joseph (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S118000

Reexamination Certificate

active

07924205

ABSTRACT:
In a successive approximation-type A/D converter, an S/H circuit samples and holds an analog input voltage. A D/A converter section receives current digital data corresponding to a current search voltage range, and outputs a plurality of comparison voltages based on the current digital data. A comparator section performs parallel comparison in which the held analog input voltage is compared with each of the plurality of comparison voltages. A successive approximation register section outputs digital data for a next search voltage range within the current search voltage range as the current digital data to the digital-to-analog converter section based on a result of the parallel comparison using the current search voltage range. A timing control circuit generates a switching signal from the parallel comparison to a redundant comparison such that the redundant comparison is performed.

REFERENCES:
patent: 5675340 (1997-10-01), Hester et al.
Akira Hayakawa et al—High Performance Successive Approximation ADC Architecture—ECT-06-31—Electronic Engineering Department, Faculty of Engineering, Gunma University, 1-5-1 Tenjin-cho Kiryu Gunma Japan 376-8515—Department of Electronics & Communication Eng., Musashi Institute of Technology, 1-28-1 Tamatsutsumi, Setagaya Tokyo 158-8557 Japan—pp. 1-6.

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