Reference current generator for low voltage integrated circuit, uses P and N type transistors one of which operates in saturated mode

摘要

The current generator has a current source (SI) having a first pole to which is applied a voltage (VDD) and a second pole connected to a resistance (R2). A reference voltage (VSS) is applied to the drain of a transistor (T7). The grid and source of an N type transistor (T11) are respectively connected to the grid and source of a transistor (T8).. Reference current (I8) generator which includes: (a) a first P type transistor (T7) whose source is connected to a first pole of a resistance (R2) and whose grid is connected to a second pole of the resistance (R2). The current reference (I8) passing through the resistance (R2) varies as a function of the voltage level of the first transistor, and; a second N type transistor (T8) whose drain, grid and source are respectively connected to the first and second pole of resistance (R2), and to the drain of transistor (T7). The transistor (T8) operates in saturated mode.