| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive, low power loss polarity reversal rectifying circuit. SOLUTION: N channel MOSFETs Q1, Q2 and P channel MOSFETs Q3, Q4 consist of two sets of circuit where the p-channel MOS and the n-channel MOS are connected in series and these two sets of circuit are connected in parallel as a bridge, wherein the gate of each MOSFET is connected with an input line by the voltage division point of a voltage division resistor between the input potential and the drain. When the voltage inputted to input terminals 1 and 2 has a positive polarity +Vi, gate of the Q3 is biased negatively, while the gate of the Q2 is biased positively. Consequently, the Q2 and Q3 are brought into conductive state and when the input voltage has a negative polarity -Vi, the Q1 and Q4 are brought into conductive state. Consequently, a DC voltage of an identical polarity is outputted to the ouput terminals 3 and 4, where 3 is the positive electrode and 4 is the negative electrode both, when the polarity of the input voltage is positive and negative. COPYRIGHT: (C)2007,JPO&INPIT
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