A single chip integrated circuit analog-to-digital converter uses the successive approximation approach with resistor ladder-switching decoder digital-to-analog coverters coupled to a precision plural input comparator. An on board PROM is provided to store in digital form the information necessary to...http://www.google.com.au/patents/US4335371?utm_source=gb-gplus-sharePatent US4335371 - Digital error correcting trimming in an analog to digital converter
