Patent ID: 6335653
Filing Date: 2002-01-01
Classification: H03K

Abstract:
A transmission gate comprising:first and second terminals; a first transistor of a first conductivity type which has a drain and source connected between said first and second terminals and is rendered conductive by a first signal; a second transistor of a second conductivity type which has a drain and source connected between said first and second terminals and is rendered conductive by a second signal corresponding to an inverted signal of said first signal; a first body effect compensation circuit for reducing the difference between a potential of a back gate and a potential of the source of said first transistor when said first transistor is ON; and a second body effect compensation circuit for reducing the difference between a potential of a back gate and a potential of the source of said second transistor when said second transistor is ON, said first body effect compensation circuit including a third transistor of the second conductivity type having a drain and source connected between the back gate of said first transistor and said first terminal, and a fourth transistor of the second conductivity type having a drain and source connected between the back gate of said first transistor and said second terminal, and said second body effect compensation circuit including a fifth transistor of the first conductivity type having a drain and source connected between the back gate of said second transistor and said first terminal, and a sixth transistor of the first conductivity type having a drain and source connected between the back gate of said second transistor and said second terminal, wherein back gates of both said third and fourth transistors are connected to the back gate of said second transistor, and back gates of both said fifth and sixth transistors are connected to the back gate of said first transistor.