US Patent 9312747 Fast start-up circuit for low power current mirror

A fast startup circuit delivers current to a number of loads, comprising a P-channel current mirror circuit that provides current to an N-channel current mirror circuit that distributes current to a plurality of circuit networks. A first capacitor and a second capacitor are charged to two different voltages when the circuit is disabled and the two voltages are equalized when the circuit is enabled creating an initial operational starting point that has a steady state operating voltage that is the same as that during continuous operations. Thus there is no waiting for the fast startup circuit to start from an off condition and build up exponentially to a steady state operational level.