Patent ID: 8072244

Claim:
A current sensing amplifier comprising: a power input terminal being arranged for providing an input voltage; a first current path comprising a first transistor, a first switch and a first load connected in sequential, the first transistor and the first switch being connected to a first node, and the source of the first transistor being connected to the power input terminal; a second current path comprising a second transistor, a second switch and a second load connected in sequential, the second transistor and the second switch being connected in a second node, and the source of the second transistor being connected to the power input terminal; a third switch being connected between the gate of the first transistor and the first node; a fourth switch being connected between the gate of the second transistor and the second node; a first capacitor being connected between the gate of the first transistor and the second node; a second capacitor being connected between the gate of the second transistor and first node; a latch circuit being connected between the first node and the second node; and a latch switch being connected between the latch circuit and a grounding terminal.