Hi Guys, I have a control loop that has what the manufacturer calls a load emulator, which is a combination of resistors and capacitors across the feedback path of an op-amp. This is used on the first 5 uS after switching as the feedback from the sensor measuring the current on the load is to noisy. The manufacturer claims that the modelling of the load with a certain resistance and inductance in series can be done by using a circuit with a certain resistance and capacitance in parallel and a circuit with a certain resistance and inductance in parallel can be done by using a circuit with a certain resistance and capacitance in series, is this correct? Best regards Luis -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist