Relay circuitry is design to cause delay so that Everycircuit start the simulation not from initial biased value.
The Lower One opamp as non inverting amplifier to magnify current to larger voltage for comparison purpose.
Upper Opamp model used as comparator. Additional voltage supply in front of it is intended to control current level.
Perhaps this is a type of One/Off Close Loop Control (CLC) constant current source circuit. User can change incoming voltage beside relay to observe the output current fluctuate within predefined range.
2/12/2023 -> Updated mosfet drive circuit with speed up capacitor to prevent current overshoot. Added 15~20us start up delay circuitry using MOSFETs.
3/12/2023 -> Simplify the opamp comparator circuitry after knowing opamp comparator has linear amplifying effect before the positive feedback. Simplify relay turns on delay circuitry. Thanks 592azy2circuitdude for proposed correction.
