POWER SUPPLY CIRCUIT DEVICE USING NEGATIVE THRESHOLD VOLTAGE FIVE-TERMINAL NMOS TRANSISTOR ELEMENT WITH MULTI-STEP CONNECTION OF POWER AMPLIFICATION FOR THREE-PHASE APPLICATION

摘要

The present invention relates to a voltage converter for converting from alternating current and direct current power sources with high voltage into a direct current power source with low voltage. The voltage converter does not have an additional configuration of a common transformation circuit and a configuration of a Zener diode, and has a configuration of a depletion n-type metal oxide semiconductor (NMOS) field effect transistor (FET) having negative voltage between a gate and a source (negative Vgs). In other words, the voltage converter includes a negative threshold voltage five-terminal NMOS FET element. Accordingly, a low cost circuit can be realized by removing the configuration of the common transformation circuit (100) and a circuit region of the Zener diode (104), so as to remove the area occupied in the common transformation circuit (100) and the circuit region of the Zener diode (104).;COPYRIGHT KIPO 2017