Patent ID: 8797701

Claim:
An electronic load for testing stability of a power voltage of a power source, comprising: a voltage supply device configured to provide a control voltage and comprising a control unit and a digital-analog convertor (DAC), the control unit outputting a digital voltage control signal to the DAC, and the DAC converting the digital voltage control signal into a corresponding analog control voltage and outputting the converted analog control voltage; a field effect transistor (FET) comprising a gate electrode, a source electrode, and a drain electrode, the drain electrode connected to the power source; an amplification circuit electrically connected with the voltage supply device and configured to amplify the control voltage from the voltage supply device and drive the FET using the amplified control voltage, the amplification circuit comprising a first input connected to the voltage supply device to receive the converted analog control voltage, a second input connected to the source electrode of the FET, and an output connected to the gate electrode of the FET; and a current sampling resistor comprising one end connected to ground and the other end connected to the source electrode of the FET and the second input of the amplification circuit.