The improved one-BJT current-limiting supply is not much different than the primitive circuit, though its one additional resistor does change the circuit behavior. The improved circuit is shown below.

Nothing is worse for a design team than a chip that fails to work in the bringup lab. Electrical problems are historically a major cause of such failures. Power leaks, power-ground DC paths, missing ...

The recent EDN article of Bruce Trump () on the input impedance of an op-amp circuit took into account the single-pole roll-off of its loop gain. He showed with a simple derivation how the equivalent ...