SYSTEM AND METHOD TO PROVIDE MEASUREMENT CAPABILITIES FOR BOTH SINGLE-ENDED AND DIFFERENTIAL SIGNALS WITH SOFTWARE SWITCHING

Improved input circuitry for use in conjunction with measurement devices is disclosed. The subject input circuitry enables a single measurement device to take measurements on both single-ended and differential signal inputs. Software-implemented control signals can be programmed by a user or set to default values to select which type of input signal is to be measured. The input circuitry minimizes the use of electromechanical relays and other components or phenomena that may degrade the quality of the input signals, and also includes resistor networks to additionally help maintain signal integrity. A plurality of common programmable voltage sources is provided for use in accordance with select embodiments of the disclosed technology to serve as either termination voltages, threshold voltages, or both. Both three-comparator and five-comparator input circuit configurations are presented to display the versatility in implementing aspects of the present subject matter and to offer options for reduced component count and other advantages.