Patent ID: 6414534
Filing Date: 2002-07-02
Classification: H03K

Abstract:
A level shifting circuit comprising:a circuit input that swings between a low supply and ground; a circuit output that swings between a high supply and said ground; an inverter with input connected to said circuit input and output forming inverted circuit input; a first NMOS transistor with gate connected to said circuit input and with source connected to said ground; a first PMOS transistor with gate connected to said circuit output, with source connected to said high supply, and with drain connected to said first NMOS transistor drain; a second NMOS transistor with gate connected to said inverted circuit input, with source connected to said ground, and with drain connected to said circuit output; a second PMOS transistor with gate connected to said first NMOS transistor drain, with source connected to said high supply, and with drain connected to said circuit output; a third NMOS transistor with gate connected to said first NMOS transistor drain, with source connected to said circuit input, and with drain connected to said circuit output; and a fourth NMOS transistor with gate connected to said second NMOS transistor drain, with source connected to said inverted circuit input, and with drain connected to said first NMOS transistor drain.