Patent ID: 6891422
Filing Date: 2005-05-10
Classification: G09G,H03K

Abstract:
1. A level shifter for receiving input voltage signals alternately having a first level voltage and a second level voltage, and generating a third level voltage and a fourth level voltage respectively according to the first level voltage and the second level voltage, comprising: a first transistor coupled between a first power source having a fifth level voltage and an output end, and having a gate for receiving the input voltage signal; a second transistor coupled between the output end and a second power source having a sixth level voltage; a capacitance component formed between the output end and a gate of the second transistor; a switching element for applying a voltage corresponding to the first level voltage to the gate of the second transistor in response to the first level voltage, and cutting off the input voltage signal and the gate of the second transistor electrically in response to the second level voltage; and at least a third transistor coupled in series between the output end and the second transistor, the third transistor having a gate coupled to a gate of the second transistor.