Patent ID: 8508078

Claim:
A reverse current blocking (RCB) circuit comprising: a first transistor having a first current carrying terminal coupled to a first input terminal of the RCB circuit and a second current carrying terminal coupled to a first node; a first charge pump operative to supply a first voltage signal to a gate terminal of the first transistor in response to a reference voltage; a second transistor having a first current carrying terminal coupled to an output terminal of the RCB circuit, and a second current carrying terminal coupled to the first node; a second charge pump operative to supply a second voltage signal to a gate terminal of the second transistor in response to a feedback signal; and an amplifier having a first input terminal receiving the output voltage of the RCB circuit, and a second input terminal receiving a voltage defined by a voltage of the first node and an offset voltage, said amplifier supplying the feedback signal to the second charge pump.