Current-mode sense amplifier

摘要

A current-mode sense amplifier comprises a current mirror circuit the input branch (NT1) of which is controlled by a current input signal to be sensed and the output branch (NT3) of which is connected to a capacitor (C1). The output branch (NT3) and the gates of the current mirror transistors (NT1, NT3) are connected to transistors (PT1, NT2) for precharge operation. The sense amplifier needs no reference current, provides low component count, and is noise resistant. <IMAGE>