Patent ID: 7042376

Claim:
A scanning front end in a measurement device, the scanning front end comprising: N input channels; signal conditioning circuitry; an N to 1 multiplexing device coupled to the N input channels and the signal conditioning circuitry, the N to 1 multiplexing device including: N single-pole, double throw (SPDT) switches, each of the SPDT switches coupled to an input channel, wherein each of the SPDT switches includes an input terminal, a first output terminal, and a second output terminal, wherein each of the SPDT switches is operable to toggle between a first position to couple to the first output terminal and a second position to couple to the second output terminal, wherein the first output terminal of each of the SPDT switches is coupled to the signal conditioning circuitry and to the first output terminals of the remaining SPDT switches, wherein the second output terminal of each of the SPDT switches is coupled to ground; and N input resistors, each of the input resistors coupled to an input channel, wherein the input terminal of each of the SPDT switches is coupled to an input resistor; wherein the SPDT switches are operable to multiplex input signals received at the input channels of the scanning front end into the signal conditioning circuitry.