Patent ID: 6020778
Filing Date: 2000-02-01
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; anda 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, andsaid second body effect compensation circuit including a fourth transistor of the first conductivity type having a drain and source connected between the back gate of said second transistor and said first terminal,wherein a back gate of said third transistor is connected to the back gate of said second transistor, and a back gate of said fourth transistor is connected to the back gate of said first transistor.