About the "Improved Peak Detector" available here:
Demo Circuit: https://www.analog.com/media/en/simulation-models/LTspice-demo-circuits/LTC6244_PeakDetector_Improved.asc
I would like to measure the DC with an voltmeter, so the holding time must be, at least, 3~5 seconds, and the LTSpice show me a holding time of only 1~2 ms.
I tried increase the capacitor (C1) value, as well R4 and R6, but with no success.
May someone give me a help about how to increase the holding time to 3~5 seconds?
Thanks in advance,
3-5 seconds is a very long time for any sample-hold circuit. One thing you could do is replace R4 with a low-leakage analog switch (or JFET), which you could use to reset C1 to zero, then open…