Image Number 3 for United States Patent #6650152.
An intermediate voltage control circuit maintains the signal line at a stable intermediate potential. The circuit comprises a first n-channel transistor; a second p-channel transistor; a monitoring circuit for determining a potential level of a signal line connected to the output node; and a control circuit for sending first and second control signals to a gate of each of the first and second transistors so as to prevent a feedthrough current from flowing in the transistor.
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