Patent ID: 6836155
Filing Date: 2004-12-28
Classification: G11C,H03F

Abstract:
A current sense amplifier, comprising:a pair of cross-coupled transistors, each transistor being connected between a respective input signal line of a pair of input signal lines and a respective output signal generating node of a pair of output signal generating nodes, for a amplifying voltage difference between the pair of output signal generating nodes; a constant current circuit connected between the output signal generating nodes and a common node for allowing current to flow between the common node and the output signal generating nodes in response to a bias voltage; a first voltage generating circuit connected between a respective output signal generating node and the common node for causing a voltage difference between the output signal generating nodes by being turned on in response to a respective output signal of a pair of output signals; a second voltage generating circuit connected between a power supply voltage and a respective output signal generating node for causing a voltage difference between the output signal generating nodes by being turned on in response to a respective output signal of the pair of output signals; a third voltage generating circuit connected between a respective input signal line and a respective output signal generating node for causing a voltage difference between the output signal generating nodes by being turned on in response to a respective output signal of the pair of output signals; a first voltage amplifying circuit connected between one of the input signal lines and the common node for amplifying a signal of one of the output signal generating nodes, wherein a trigger voltage of the first voltage amplifying circuit is changed in response to a voltage of the output signal generating node; and a second voltage amplifying circuit connected between the other input signal line and the common node for amplifying a signal of the other output signal generating node, wherein a trigger voltage of the second voltage amplifying circuit is changed in response to voltage of the other output signal generating node.