Patent ID: 6650152
Filing Date: 2003-11-18
Classification: G05F

Abstract:
An intermediate voltage control circuit comprising:a first transistor having a first channel type and connected between a power node and an output node, said output node connected to a signal line, said power node supplied with power supply voltage that is higher than ground; a second transistor having a second channel type and connected between said output node and ground; a monitoring circuit connected to said output node, and outputting a determination signal in response to a voltage level of said signal line; and a control circuit having an external input node supplied with an enable signal, connected to said monitoring circuit, and controlling each of said first and second transistors, wherein said control circuit turns on one of said first and second transistors and turns off the other of said first and second transistors in response to said determination signal when said enable signal is activated, and said control circuit turns off both of said first and second transistors while said enable signal is inactivated, and wherein said first channel type transistor is an N-channel transistor and said second channel type transistor is a P-channel transistor.