Patent ID: 6476646
Filing Date: 2002-11-05
Classification: G11C,H03F,H03K

Abstract:
A current sense amplifier comprising:a first input port for receiving a first current signal; a first complementary input port for receiving a second current signal; a first transistor and a second transistor cross coupled to each other, for receiving current signals output from the first input port and the first complementary input port and outputting a first output signal and a second output signal to a first output port and a first complementary output port; a third transistor and a fourth transistor for supplying current to the first output port and the first complementary output port; a first resistor serially connected between the first input port and the first transistor; a second resistor serially connected between the first complementary input port and the second transistor; and a full differential amplifier receiving the first and second output signals, the full differential amplifier comprising a second output port, a second complementary output port, and a voltage level control circuit limiting a mean value of a voltage level at the second output port and a voltage level at the second complementary output port to below a particular level.