VARIABLE SLOPE D/A FOR GAIN CONTROL
Original Publication Date: 1981-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
Many systems require that a microporcessor change voltage using a Digital-to- Analog Converter (D/A) to provide a correction or initiate some action. These systems often also require these changes to be in proportional steps, say 1%. A linear D/A configured to go from .5 VDC to 1.5 VDC and to be adjustable in at least 1% steps for example, would have to have a step size of (3 VDC) (.01)=5 mv. This would require 200 steps (8 bits) to go from .5 to 1.5 VDC and at 1.5 VDC the step would only be 0.3%.