Im working in Pspice, I have an RF amp with a modulated input signal coming in on ~600kHz carrier wave and an amplified signal coming out, here is what the output looks like 1Megaohm load after a blocking capacitor to isolate AC: http://i.imgur.com/56NSI.png I am trying to use a simple http://en.wikipedia.org/wiki/File:C_Simple_envelope_detector.gif" [Broken] circuit after the RF amp without a load resistor. using t = 1/2*pi*f = RC with f=400hz and C=0.01uF I solved for R (4k). Here is the circuit: http://imgur.com/09Dpk and here is what the output out of the detector looks like: http://imgur.com/TZSXA Looks distorted if im not mistaken and no where near the ~700mV output peak. What did I design wrong in the detector? Edit: noticed I probed at ground node of detector but output signal looks the same at the top node of detector output.