Patent ID: 7564271
Filing Date: 2009-07-21
Classification: G01R,G11C,H03F

Abstract:
1. A sense amplifier comprising: a first transistor having a gate connected to a first input terminal; a second transistor having a gate connected to a sccond input terminal; a third transistor having a source connected to a first power source; a fourth transistor having a source connected to the first power source; a first capacitor, wherein a first terminal of the first capacitor is connected to a drain of the first transistor and a second terminal of the first capacitor is connected to a gate of the third transistor; and first means for setting a potential of a drain of the third transistor, a potential of the gate of the third transistor, and the first and second terminals of the first capacitor to be smaller than a potential of the first power source by an amount equal to or more than a potential equivalent to a threshold voltage of the third transistor, wherein sources of the first and second transistors are connected to each other.