Patent ID: 7590019

Claim:
A current sense amplifier, comprising: first and second load circuits, each load circuit having a first terminal coupled to a peripheral voltage supply and further having a second terminal; first and second transistors, each having a drain terminal coupled to the second terminal of a respective load circuit and further coupled to an output buffer, a gate coupled to the drain of the other transistor, and a source coupled to first and second lines of a GIO line; and wherein the first and the second lines of the GIO are coupled to a source follower circuit that includes: first and second n-channel MOS (NMOS) transistors having a drain coupled to the first and the second signal lines of the GIO respectively, a gate coupled to first and second signal lines of a LIO line respectively; a third NMOS transistor having a source coupled to a source of the first and the second NMOS transistors and a gate coupled to a reference voltage supply; and a fourth NMOS transistor coupled to a drain of the third NMOS transistor.