Patent ID: 6380723
Filing Date: 2002-04-30
Classification: G05F

Abstract:
An apparatus that provides a reference voltage that operates from a low-voltage power supply, comprising:a current source circuit is arranged to provide a current that is proportional to a change in base-emitter voltage and inversely proportional to a reference resistance value; a diode circuit that is coupled to the current source, wherein the diode circuit has an associated diode voltage; a first resistive circuit that is series coupled to a second resistive circuit, the first resistive circuit and the second resistive circuit sharing a common node, the first and second resistive circuits are arranged in parallel with the diode device to provide a first voltage contribution at the common node that is associated with the current source that is lower than the associated diode voltage; and another current source circuit is arranged to provide another current to the common node, wherein the another current is proportional to the current such that a second voltage contribution is provided at the common node, wherein the reference voltage is given as the sum of the first voltage contribution and the second voltage contribution.