A STARTUP CIRCUIT FOR VOLTAGE & CURRENT REFERENCES WITH ZERO STEADY STATE CURRENT
Original Publication Date: 2002-Apr-08
Included in the Prior Art Database: 2002-Apr-08
A startup circuit that supplies current to a Beta multiplier reference circuit is presented. At the time of starting of a reference circuit, the startup circuit provides startup current so that the reference circuit is brought to its desired operating state. In the steady state, when the reference circuit has stabilized at its desired operating condition, the startup circuit draws no supply current. Thus, it is particularly useful for low power ICs that contain a voltage or current reference circuit. The startup circuit uses feedback from the reference circuit to make sure that the reference circuit has reached its desired operating condition prior to shutting itself off.