FIRST FRONT STAGE CURRENT-MODE CIRCUIT FOR READING SENSORS AND INTEGRATED CIRCUIT

摘要

The first circuit comprises an input stage for dividing an input current into two or more output currents, said stage comprising a common base/gate stage formed by a plurality of transistors Qo,... Qn arranged to form two or more groups, such that each group provides one of the two or more output current signals at a respective output node (a, b). In a preferred embodiment, the invention also includes high- and low-gain mirrors connected respectively to the output node (a) of the first group and to the output node (b) of the second group, said high-gain current mirror comprising a control circuit for preventing the malfunctioning of the common base/gate stage in the event of high input currents.