Patent ID: 6011385
Filing Date: 2000-01-04
Classification: G05F

Abstract:
A device for controlling the size of a main current to a value by mirroring between a control current and the main current, comprising:first and second transistor units operating in an ohmic state, wherein each transistor unit is connected to a supply voltage and to a reference point, said first transistor unit is connected to a load and emits a current to the load, the second transistor unit is arranged such that a mirroring occurs between the control current driven through said second transistor unit and the main current, wherein the magnitude of current driven through the first and second transistor units is affected by first and second parameters, b.sub.1 and b.sub.2, respectively, and wherein b.sub.1 /b.sub.2 represents a scaling factor, K, which is greater than 1;a current generator which is arranged to drive the control current through the second transistor unit; anda control unit arranged to regulate the main current to the load so that a voltage difference between a voltage drain of said transistor unit becomes substantially 0 V and wherein the size of the main current is the control current multiplied by said scaling factor K.