BACK-GATE VOLTAGE GENERATOR CIRCUIT, FOUR-TERMINAL BACK GATE SWITCHING FET, AND CHARGE AND DISCHARGE PROTECTION CIRCUIT USING SAME

摘要

A back-gate voltage generator circuit generating a back-gate voltage of a four-terminal back gate switching MOSFET for charge and discharge control is disclosed. The back-gate voltage generator circuit includes first and second n-type MOSFETs connected in series through a common source electrode. A voltage at the common source electrode of the first and second n-type MOSFETS connected in series serves as the back-gate voltage of the four-terminal back gate switching MOSFET, and the back-gate voltage is used as a reference voltage for generating signals for controlling the first and second n-type MOSFETS.