EXTENSION OF A/D CONVERTER RESOLUTION
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2001-Dec-18
The invention uses a digital to analog (D/A con- verter in conjunction with some simple circuitry in order to increase the resolution of a multi channel sin- gle analog to digital (A/D) converter. The invention is especially, but not exclusively, applicable to microcon- trollers where A/D and D/A (in the form of a PWM) elements are common but where the A/D often does not have enough resolution for the end application. High resolution A/D converters are of course avail- able, but they are expensive and so this idea may pro- vide a more cost effective solution for many applica- tions.