Original circuit:
(from this discussion)
To see the simulation, click "Open in editor", "Simulate", "Time domain", "Run time domain analysis"
Changes made from original:
- Used the op-amp model with voltage rails. This is necessary because the op-amp is unable to maintain feedback condition when Ve is falling, and its output becomes saturated at the negative rail. (With the original circuit, the op-amp output isn't limited by any rails, and heads toward negative infinity as fast as the slew rate limit lets it.)
- Changed simulation length from 50ms down to 10ms, and the time step from 10us up to 20us, so that the simulation runs much faster while still showing the same results.
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