Patent ID: 8644042

Claim:
An alternate current rectifier circuit, comprising: two alternating input terminals; two alternating output terminals; a first diode, a second diode, a non-polarized capacitor, a first transistor, a second transistor, a third transistor, and a fourth transistor; the first diode connected between a first pair of the alternating input terminal and the alternating output terminal, the second diode connected between a second pair of the alternating input terminal and the alternating output terminal; the first transistor and the fourth transistor in parallel connected to the first diode and the alternating input terminal connected to the second diode, the second transistor and the third transistor in parallel connected to the second diode and the alternating input terminal connected to the first diode, the non-polarized capacitor connected between the first diode and the second diode; wherein during a positive half cycle of an alternate current, the first transistor and the fourth transistor are switched on and the alternate current flows through the first diode, the first transistor, and the fourth transistor; during a negative half cycle of the alternate current, the second transistor and the third transistor are switched on and the alternate current flows through the second diode, the second transistor, and the third transistor; wherein each of the first and second diodes comprises an anode and a cathode, each of the first, second, third, and fourth transistors comprises a first terminal, a second terminal, and a control terminal configured for controlling the connection and the disconnection between the first terminal and the second terminal; the non-polarized capacitor is connected between the anode of the first diode and the anode of the second diode; the cathode of the first diode is connected to the first terminal of the first transistor and the second terminal of the third transistor; the cathode of the second diode is connected to the first terminal of the second transistor and the second terminal of the fourth transistor; the second terminal of the first transistor is connected to the anode of the second diode and the first terminal of the fourth transistor; the second terminal of the second transistor is connected to the anode of the first diode and the first terminal of the third transistor; the anodes of the first diode and the second diode serve as the alternating input terminals, the cathodes of the first diode and the second diode serve as the alternating output terminals; wherein the alternate current rectifier circuit comprises a first polarized capacitor and a second polarized capacitor; the first polarized capacitor comprises a positive terminal connected to the second terminal of the first transistor and a negative terminal connected to the first terminal of the fourth transistor; the second polarized capacitor comprises a positive terminal connected to the second terminal of the second transistor and a negative terminal connected to the first terminal of the third transistor.