Patent ID: 8892377

Claim:
A digital programmable load measurement device, comprising: an R-2R ladder network which includes a plurality of resistors and a plurality of switches, the R-2R ladder network controlling connection of each switch and the corresponding resistor through an external control signal to determine a load resistance of a device under test; a voltage follower which is electrically connected to the R-2R ladder network to obtain a load signal of the device under test, wherein the voltage follower includes a voltage amplifier, the device under test including two ends formed at voltages defined respectively a first reference signal and a distal end signal, the voltage amplifier including an non-inverted input end and an inverted input end, the voltage amplifier outputting feedback to the inverted input end thereof and the non-inverted input end receiving the distal end signal of the device under test, the load signal of the device under test being obtained through a first signal output from the voltage follower; and a current follower which is electrically connected to the R-2R ladder network to obtain a load current of the device under test, wherein the current follower includes a current amplifier and a current-limiting resistor, the current follower including an non-inverted input end and an inverted input end, the current follower outputting feedback through the current-limiting resistor to the inverted input end thereof and the non-inverted input end receiving the distal end signal of the device under test, the inverted input end being electrically connected to a measured output signal of the R-2R ladder network, the load current of the device under test being obtained through a second signal output from the current follower.