of third transistor 50 is much smaller than that of the first transistor 46 thus circuit 10 u2032 operates essentially in the manner as the above described circuit 10 however if circuit 10 u2032 is perturbed from equilibrium for example by a short circuiting of the load resistance r l then the current i x will increase to the point that the third transistor 50 enters saturation at this point the current flow through the first transistor 46 is effectively choked off by the large drain to source resistance of the third transistor 50 any increase in current i x above and beyond that required to saturate the third transistor 50 will then go to charge capacitance 42 and slew node 36 furthermore the voltage of node 36 will no longer be limited by the current that the pnp transistor 22 can deliver therefore circuit 10 u2032 will slew substantially faster than prior art circuit 10 when the third transistor 50 saturates the pole created by parasitic capacitor 42 moves in to lower frequencies if the circuit were operating at equilibrium this would erode the phase margin and could potentially cause the circuit to become unstable however third transistor 50 only saturates when circuit 10 u2032 is far from equilibrium as the circuit approaches equilibrium the third transistor 50 drops back into triode mode and the pole created by parasitic capacitor 42 moves out to higher frequencies therefore circuit 10 u2032 exhibits stable operation at equilibrium in combination with rapid slewing when far from equilibrium more.