Diagnostic apparatus for digital-to-analog converters

Details Diagnostic apparatus for digital-to-analog converters Diagnostic apparatus for digital-to-analog converters

H - Electricity

03

M

354/21

H03M 1/10 (2006.01) G06F 11/25 (2006.01) G06F 11/277 (2006.01) H03M 1/00 (2006.01)

Patent

CA 1191259

Abstract An apparatus for diagnosing a plurality of digital to-analog converters simultaneously is provided. Digital signal generation means applies digital signals to the plurality of digital-to-analog converters, and the digital signals are changed in sequence so that the analog outputs from the con- verters are changed symmetrically with respect to a first predetermined value. The analog otuputs from the converters are combined by a resistor network, and the combined output is compared with a second predetermined value by a comparator. If the comparator's output is kept to a predetermined level regard- less of changing the digital signals, the digital-to-analog converters are judged that they operate properly.

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