Patent ID: 8258817
Filing Date: 2012-09-04
Classification: H01L,H03F

Abstract:
1. A semiconductor integrated circuit comprising: a first transistor of a first channel type, a source terminal of which is connected to a first power source node, a gate terminal and a drain terminal of which are connected to a first node; a second transistor of the first channel type, a source terminal of which is connected to the first power source node, a drain terminal of which is connected to a signal output node, a gate terminal of which is connected to the first node, and which constitutes a current mirror circuit together with the first transistor; a third transistor of a second channel type, a drain terminal of which is connected to the drain terminal of the first transistor, and to a gate terminal of which a first external signal is input; a fourth transistor of the second channel type, a drain terminal of which is connected to the signal output terminal, a source terminal of which is connected to a source terminal of the third transistor, to a gate terminal of which a second external signal is input, and which constitutes a differential pair circuit together with the third transistor; a first constant current source circuit, one end of which is connected to the source terminals of the third and fourth transistors, and the other end of which is connected to a second power source node; a fifth transistor of the second channel type, a current pathway of which between a source terminal and a drain terminal is inserted between the first node and the one end of the first constant current source circuit, and a gate terminal of which is connected to the signal output node; and a sixth transistor of the second channel type, a current pathway of which between a source terminal and a drain terminal is connected in series to the current pathway between the source terminal and the drain terminal of the fifth transistor, and to a gate terminal of which a signal of logic opposite to a signal to be obtained at the signal output node is input.