Patent ID: 6661260
Filing Date: 2003-12-09
Classification: H03K

Abstract:
An output circuit of a semiconductor circuit, comprising:a higher potential side power supply line; an output signal line on which an output signal is outputted; a control signal line on which a control signal is transferred; a gate signal line on which a gate signal is transferred; an output transistor connected between said higher potential side power supply line and said output signal line to operate in response to said gate signal on said gate signal line; a first switch connected to said higher potential side power supply line to turn off in response to said control signal of a first state and turn on in response to said control signal of a second state; and a gate drive circuit connected between said first switch and said control signal line to generate said gate signal onto said gate signal line based on a gate control signal when said first switch is turned on, wherein said output transistor is a first N-channel transistor, and said output circuit further comprises: a second switch connected between said gate signal line and said output signal line to turn on in response to said control signal of said first state and to turn off in response to said control signal off said second state.