Patent ID: 7009314

Claim:
A one-way switch having a P-terminal and an N-terminal, comprising: a P channel transistor having a source, a drain and a gate, and the drain functions as the P-terminal, and the source functions as the N-terminal; and a driver coupled to the P channel transistor to turn on the P channel transistor in one direction, the driver comprising: an operation amplifier with an inverting input terminal, a non-inverting input terminal and an output terminal, wherein the non-inverting input terminal is coupled to the source, and the output terminal is coupled to the gate; a first resistor, one terminal of the first resistor coupled to the drain and the other terminal of the first resistor coupled to the inverting input terminal; and a second resistor, one terminal of the second resistor coupled to the inverting input terminal, the other terminal of the second resistor coupled to the output terminal.