Method and apparatus for combining a flash analog to digital converter with digital to analog functions
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United States of America Patent
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Sep 6, 1994
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N/A
app pub date -
Aug 31, 1993
filing date -
Aug 31, 1993
priority date (Note) -
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Abstract
A converter circuit provides analog to digital and digital to analog functions on a single silicon device. A flash analog to digital converter produces digital outputs using comparators which each receive an input signal and which each have different reference voltages. A decoder receiving digital inputs activates switches to connect selected ones of the same voltage references used by the flash analog to digital converter to a buffer which produces an analog output. The converter circuit can be a single or multi-stage flash analog to digital converter operating in a single channel or multi-channel environment. Timing and control logic prevents switching from occurring at times when perturbations on the voltage references could affect the analog and digital outputs.
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