Patent ID: 6593800
Filing Date: 2003-07-15
Classification: G05F,H02M

Abstract:
A semiconductor integrated circuit device, comprising:a first MOSFET with a first-conductivity type having a source terminal connected to a semiconductor substrate with a second-conductivity type different from the first-conductivity type, a drain terminal to which a first supply voltage is applied, and a gate terminal; a pump circuit having an output terminal connected to the gate terminal of the first MOSFET and to the substrate, for pumping out second-conductivity type carriers and thereby biasing the semiconductor substrate; a switching element operative on the basis of a control signal, and having a first terminal to which a second supply voltage is applied and a second terminal connected to the gate terminal of the first MOSFET, and a rectifying part having a first terminal connected to the source terminal of the first MOSEET and a second terminal connected to the gate terminal of the first MOSFET.