Patent ID: 7554366
Filing Date: 2009-06-30
Classification: H03K

Abstract:
1. A CMOS driving circuit, comprising: a first DC input terminal adapted to input a first DC input voltage; a second DC input terminal adapted to input a second DC input voltage; a first multistage buffer stage adapted to amplify an output current stage by stage, connected with the first DC input terminal and including at least one buffer stage; a second multistage buffer stage adapted to amplify the output current stage by stage, connected with the second DC input terminal and including at least one buffer stage; a comparator adapted to compare the first DC input voltage with the second DC input voltage; a first converting circuit comprising: a second converting circuit comprising: wherein when the first DC input voltage is higher than the second DC input voltage, a comparison signal output from the comparator is input to the first transistor switch of the first converting circuit, so that the first transistor switch turns on and the second transistor switch of the second converting circuit turns off, and a first timing signal output from the final stage of the first multistage buffer stage is input to the gates of the first PMOS transistor and the first NMOS transistor, the second DC input voltage is input to the gate of the second PMOS transistor, and the gate of the second NMOS transistor is grounded; and wherein when the second DC input voltage is higher than the first DC input voltage, a comparison signal output from the comparator is input to the first transistor switch of the first converting circuit, so that the first transistor switch turns off and the second transistor switch of the second converting circuit turns on, and a second timing signal output from the final stage of the second multistage buffer stage is input to the gates of the second PMOS transistor and the second NMOS transistor, the first DC input voltage is input to the gate of the first PMOS transistor, and the gate of the first NMOS transistor is grounded.