Zero temperature coefficient bandgap reference circuit and method

摘要

In one aspect, the present invention provides a method of generating a substantially constant voltage. A bandgap reference circuit (112/114/116) is trimmed such that a voltage output (VBG) from the bandgap reference circuit is at its peak value when an operating temperature is at its minimum value within a specified operating temperature range. A plurality of additional current sources (118-124) are also provided with the bandgap reference circuit. Each current source is designed to successively provide additional current as the operating temperature increases within the specified operating temperature range.