VOLTAGE REGULATOR WITH IMPROVED LOAD REGULATION

摘要

A voltage regulator comprises a ground node, a pick-off node, a regulator branch, a load branch, and a current mirror the regulator branch and the load branch are connected in parallel between the pick-off node and the ground node; the load branch comprises one or more resistive connecting lines that are connectable in series with the load to generate a load current through the load branch; the regulator branch comprises a bias node, a resistive element, and a tap node; the bias node is arranged to provide a regulated bias voltage; the resistive element is connected between the bias node and the pick-off node; and the tap node is connected between the bias node and the resistive element. The current mirror is connected to the tap node and arranged to draw a mirror current from the tap node; the mirror current having a component that is proportional to the load current.

主权项

1. A voltage regulator for applying a regulated voltage across a load, wherein the voltage regulator comprises a groud node, a pick-off node, a regulator branch, a load branch, and a current mirror;
the ground node is arranged to provide a ground voltage; the pick-off node is arranged to provide a pick-off voltage; the regulator branch and the load branch are connected in parallel between the pick-off node and the ground node; the load branch comprises one or more resistive connecting lines that are connected or connectable in series with the load to generate a load current through the load branch; the regulator branch comprises a bias node, a resistive element, and a tap node; the bias node is arranged to provide a regulated bias voltage; the resistive element is connected between the bias node and the pick-off node; and the tap node is connected between the bias node and the resistive element; wherein the current mirror is connected to the tap node and arranged to draw a tap current from the tap node; the tap current having a component that is proportional to the load current so that the pick-off voltage increases when the load current increases and decreases when the load current decreases.