Patent ID: 7057421

Claim:
A flipflop, comprising: a differential circuit coupled between a first voltage and a common node, comprising a differential pair having a first transistor and a second transistor, wherein control terminals of the first and second transistors are coupled to a first input signal and a second input signal respectively, and first terminals of the first and second transistors we coupled to the common node; a first latch unit coupled between the common node and the first voltage, and connected to the differential pair in parallel, comprising a first node and a second node to respectively coupled to second terminals of the first and second transistors in the differential pair to generate complementary latch signals according to the first and second input signals; a signal amplification circuit coupled to the differential circuit and the first latch unit, comprising a first control terminal coupled to a control signal and second and third control terminals coupled to the first input signal and the second input signal respectively, to generate complementary amplified signals according to the complementary latch signals; and a second latch unit coupled to the signal amplification circuit to generate complementary static output signals according to the complementary amplified signals and to maintain the complementary static output signals, wherein the first input signal is the inverse of the second input signal.