SENSE STRUCTURE BASED ON MULTIPLE SENSE AMPLIFIERS WITH LOCAL REGULATION OF A BIASING VOLTAGE

摘要

A solution relating to a sense structure is proposed. Particularly, the sense structure (200) comprises a plurality of sense amplifiers (205 i ), each sense amplifier comprising at least one measuring terminal (INm) and a reference terminal (INr) for receiving a measuring current (Im) and a reference current (Ir), respectively, output means (225) for providing an output voltage (Vout) according to a comparison between the measuring current and the reference current, and voltage regulating means in cascode configuration (220m,220r) for regulating a voltage at the measuring terminal and at the reference terminal, the regulating means comprising a measuring regulating transistor (220m) and a reference regulating transistor (220r) having a first conduction terminal coupled with the measuring terminal and with the reference terminal, respectively, a second conduction terminal coupled with the output means and a control terminal coupled with a biasing terminal (Tb), the sense structure further comprising biasing means (230) for providing a biasing voltage (Vb) to the biasing terminal of all the sense amplifiers, and common regulating means (235) for regulating the biasing voltage for all the sense amplifiers, wherein each sense amplifier further comprises local regulating means (240) for regulating the biasing voltage applied to the biasing terminal, and in that the sense structure further comprises switching means (245) selectively controllable for coupling the local regulating means of each sense amplifier with the common regulating means to refresh the local regulating means in a rest condition and for decoupling the local regulating means of each sense amplifier from the common regulating means in an operative condition.