Does anyone know what a DC power supply will report in terms of current? That is, if I have an op-amp configured as an AC amplifier the current from the supply look like a half wave rectified waveform.
The DC supply will display a current, but is this an average current or an RMS current?
I am trying to calculate efficiency of a Class D amplifier. Calculating output power to the load is easy: hook up the scope and use the poor man's method (CHA - CHB) to determine the differential signal's amplitude across a fixed resistance (8Ω).
I was hoping that the DC supply would display the average current so I could simply multiply it by the DC supply voltage to cacluate power delivered (Pin).
So far, I am off by 30%.
The DC supply will display a current, but is this an average current or an RMS current?
I am trying to calculate efficiency of a Class D amplifier. Calculating output power to the load is easy: hook up the scope and use the poor man's method (CHA - CHB) to determine the differential signal's amplitude across a fixed resistance (8Ω).
I was hoping that the DC supply would display the average current so I could simply multiply it by the DC supply voltage to cacluate power delivered (Pin).
So far, I am off by 30%.