Detecting the peak value

john1987 · 2010-07-29T17:17:29+00:00

Hi,I built the circuit that can detect the peak of the 100KHz , 2 Voltspeak to peak sine wave but its not accurate or may be not workingright.The problems seem to be choosing the right R and C values. Is thereany way that I can do this with out using a Capcitor and a resistorand if not than whats the best possible way to choose the R and Cvalues.I do require the edge to occur as close as possible to the sine wavepositive and negative peaks.I used Low Pass filter. you can find the diagram of the circuit andthe waveform at the following links.ThanksJohn