Saturday, 8 June 2013

Half-wave rectifier and RMS value

Half-wave rectifier and RMS value

I have built a half-wave rectifier with a 5V peak sine input, 1kHz. In theory the RMS of the output should be 5V/2 = 2.5V, but the oscilloscope only measures 2.01 V. What could be the reasons for such a difference? 0.5 V seems like a pretty significant difference given the scale.

simulate this circuit – Schematic created using CircuitLab