simple nonlinear low pass filter

This simple circuit is nonlinear passive on low pass frequency filter. It ‘s small size and easy to made for do not used the external power supply, but refuse a lot of noise ripples and need to a input voltage is stable.
The circuit works best, when the signal level is importantly higher than the constant ripple level.
The circuit has specifically related to two peak-detecting sample-and-hold circuits in tandem with a voltage average.
There are parts in figure a few : D1-D4=1N4148, C1=100uF electrolytic ,C2 – 2.2uF ceramic, R1 -100K
I hope this circuit are a little ideas your, to a big project next time.

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