AN ANALOG TO DIGITAL CONVERTER WITH VARIABLE THRESHOLD DETECTION
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2002-Mar-01
This article deals with a modified A/D converter (30) which is used to determine whether an analog input signal has exceeded a programmable thresh- old voltage. The A/D converter (30) can be used to check an input voltage against an upper bound or against a lower bound without the aid of a central processing unit (CPU) (12). As a result, the CPU (12) does not need to service the A/D converter (30) after every conversion. Instead, the CPU (12) only needs to service the A/D converter (30) after the A/D converter (30) has detected that a threshold has been exceeded.