Electronic – Op-amp triangle-square oscillator won’t oscillate in simulator

operational-amplifieroscillatorsimulation

All my theory tells me this should oscillate and I should have a triangular wave at \$V_a\$ and a square one at \$V_b\$ But those nodes all come out completely zero.

I don't understand what I have incorrect, could someone please point me in the right direction?enter image description here

Best Answer

This circuit has a stable operating point for an output of zero volts. This often happens with oscillators. A common technique is to either inject a current pulse in some node using a piecewise linear current source or force an initial condition that is different from zero.

For example add .IC V(Vb) = 1

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