CURRENT AND VOLTAGE REGULATION METHOD TO IMPROVE ELECTROMAGNETIC COMPATIBILITY PERFORMANCE

A current regulator circuit (120, 200) to improve electromagnetic compatibility performance operation of an IC device includes an input to receive a regulated voltage signal, an output to provide an output voltage at a desired voltage level, the output voltage exhibiting noise from a load (130), a first field effect transistor FET (122, 220) including a first source electrode coupled to the input, a first drain electrode coupled to the output, and a first gate electrode, a voltage clamp circuit (123, 126, 127, 210) coupled to the output, the voltage clamp circuit (123, 126, 127, 210) configured to conduct a varying current based upon the noise, a constant current source (129) to provide a constant current, and a second FET (128, 222) including a second source electrode coupled to the output, a second drain electrode coupled to the constant current source (129) and to the first gate electrode, and a second gate electrode coupled to the voltage clamp circuit (123, 126, 127, 210) to mirror the varying current in the second FET (128, 222).