One-way switch
AssigneeQuanta Computer Inc.
InventorSeng-Feng Chen
Life of this patent
Estimating the term…
Abstract
A one-way switch comprises a metal-oxide semiconductor field-effect transistor (MOSFET) and a driver. Source and drain of the transistor function as P-terminal and N-terminal of the one-way switch. The driver, such as comparator or amplifier, is used to detect the voltage difference between the source and drain of the MOSFET. When the voltage of the P-terminal is higher than that of the N-terminal, the driver 150 outputs a driving voltage to gate of the MOSFET to turn on the MOSFET. If the voltage of P-terminal is lower than that of the N-terminal, the driver 150 cannot output voltage to turn on the MOSFET, and the one-way switch is off. Therefore, the one-way switch has the characteristic of workings in one direction.
Claims7
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.
A one-way switch having a P-terminal and an N-terminal, comprising:
- a N channel transistor having a source, a drain and a gate, wherein the drain functions as the N-terminal, and the source functions as the P-terminal;
- and
- a driver coupled to the N channel transistor to turn on the N 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.
Dependencies are inferred from the claim text.