Patent ID: 7605613

Claim:
A current switch logic circuit, comprising: a current sense amplifier, comprising: a first transistor, having a gate, a first source/drain and a second source/drain, wherein the first source/drain is coupled to a first voltage, the gate is coupled to a pre-charge enable signal; a second transistor, having a gate, a first source/drain and a second source/drain, wherein the first source/drain is coupled to the second source/drain of the first transistor, the gate is coupled to a first output terminal, and the second source/drain is coupled to a second output terminal; a third transistor, having a gate, a first source/drain and a second source/drain, wherein the first source/drain is coupled to the second source/drain of the first transistor, the gate is coupled to the second output terminal, and the second source/drain is coupled to the first output terminal; a fourth transistor, having a gate, a first source/drain and a second source/drain, wherein the first source/drain is coupled to the second output terminal, the gate is coupled to the first output terminal; and a fifth transistor, having a gate, a first source/drain and a second source/drain, wherein the first source/drain is coupled to the first output terminal, and the gate is coupled to the second output terminal; and a logic tree, coupled to the current sense amplifier, for generating a first current according to a first input signal and a second input signal, and generating a second current according to a third input signal and a fourth input signal.