Patent ID: 8466737

Claim:
A charge pump device, which connects with a first input terminal, a second input terminal and a load, wherein said first input terminal and said second input terminal receive an AC (Alternating Current) signal, and which comprises an electronic switch set connecting with said first input terminal, said second input terminal and a ground terminal and switching to a conduction status according to said AC signal; and two voltage boost circuits connecting with each other, connecting with said first input terminal, said second input terminal, said electronic switch set and said load, each receiving said AC signal according to said conduction status, respectively boosting voltage of said AC signal in a positive semi-period and a negative semi-period of said AC signal, and alternately supplying said load with a voltage at least two times a peak voltage of said AC signal said electronic switch further comprises a first electronic switch connecting with said first input terminal, said second input terminal, said ground terminal and said voltage boost circuits, receiving said AC signal, and respectively switching to an off state and a conductive state in said positive semi-period and said negative semi-period; and a second electronic switch connecting with said first input terminal, said second input terminal, said ground terminal and said voltage boost circuits, receiving said AC signal, and respectively switching to a conductive state and an off state in said positive semi-period and said negative semi-period.