Hi, I am trying to simulate a S&H circuit that has a resettable integrator at its input that averages the signal in between the sampling instances. Simulating with an integrator caused “timestep too small”, while embedded in a large circuit. So, I replaced it with the continuous time moving average…

[image] nikolayt: I replaced it with the continuous time moving average filter, using a B-source with V=(idt(V(in), 0) - delay(idt(V(in), 0), Tw)) / Tw, where Tw=1/fsampling. However, this produced memory allocation error. Refer to this post. Realloc error mesage - QSPICE - Qorvo Tech Forum

Sample and hold with integrate&dump

QSPICE

KSKelvin February 1, 2026, 10:46am 3

Refer to this post.
Realloc error mesage - QSPICE - Qorvo Tech Forum

1 Like