Programmable Drivers and Level Detectors for Physical Modeling
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-27
Disclosed is a method to simplify interfacing to various digital logic technologies which may require different voltage thresholds on pin drivers and pin detectors. The objective is to software program the high and low voltage drive levels or high and low current/voltage threshold detect levels. This permits modeling of devices with a direct interface between the physical modeler and the device. The I/O behavior shell which configures input and output pins easily supports parameters which can be translated into values that select voltage levels available. A -10 volt to +10 volt range supports most logic technologies, e.g., TTL, CMOS, ECL, RS232, etc. The physical modeler requires hardware to form the programmed reference voltages which can be done with digital-to-analog converters.