Patent ID: 7372318
Filing Date: 2008-05-13
Classification: H02M

Abstract:
1. A voltage reference circuit comprising: a first port, adapted to receive an input voltage; a second port, adapted to receive a time varying input signal; a switching circuit, responsive to the first and second ports, the switching circuit generating an AC signal from the input voltage; a voltage multiplier circuit, coupled to the switching circuit to receive the AC signal and to create a DC signal with a selected voltage level, wherein the voltage multiplier circuit comprises a plurality of multiplying stages having at least one capacitor in each stage, the at least one capacitor at one or more early stages having a different capacitance than the at least one capacitor at one or more later stages; and a plurality of voltage reference modules, coupled together to form a voltage reference stack, and coupled to the voltage multiplier circuit to maintain the DC signal at a precise reference voltage.