Patent ID: 7813201

Claim:
A differential sense amplifier comprising: a first transimpedance amplifier operable to convert a first current variation into a first voltage variation; a first transconductance amplifier coupled to the first transimpedance amplifier and operable to convert the first voltage variation into a first feedback current variation and inject the first feedback current variation into a bitline; a second transimpedance amplifier operable to convert a second current variation into a second voltage variation; a second transconductance amplifier coupled to the second transimpedance amplifier and operable to convert the second voltage variation into a second feedback current variation and inject the second feedback current variation into a reference bitline; and a comparator coupled to the first transimpedance amplifier and the second transimpedance amplifier and operable to amplify a differential voltage variation, wherein the differential voltage variation is a difference between the first voltage variation and the second voltage variation.