Patent ID: 7009444
Filing Date: 2006-03-07
Classification: G05F

Abstract:
1. A silicon-based voltage reference circuit that generates a reference voltage that is less than the bandgap potential of silicon, and that is stable with temperature and supply voltage fluctuations, the voltage reference circuit comprising the following: a metal-silicon Schottky diode; a current source configured during operation to supply a current through the metal-silicon Schottky diode to a low voltage supply such that the metal-silicon Schottky diode has a current density; a PTAT voltage source configured to generate a PTAT voltage; and a summer having a first input terminal coupled to the PTAT voltage source so as to receive the PTAT voltage, and having a second input terminal coupled to the anode terminal of the metal-silicon Schottky diode to thereby sum the PTAT voltage with the voltage at the anode terminal of the metal-silicon Schottky diode.