Patent ID: 7764213
Filing Date: 2010-07-27
Classification: H03M

Abstract:
1. A method for generating a high resolution analog voltage having a plurality of different voltage values, said method comprising the steps of: a) generating a constant current having at least one current value; b) charging an integration capacitor to a voltage with the constant current over a plurality of time periods, wherein the at least one current value comprises a maximum current value over all except one of the plurality of time periods and less than a maximum current value over the one of the plurality of time periods; c) sampling the voltage on the integration capacitor at the end of the plurality of time periods; d) storing the sampled voltage; e) providing the stored sampled voltage as a high resolution analog voltage; f) removing the voltage on the integration capacitor; and g) returning to steps a) to f) using a next at least one current value and a next one of the plurality of time periods for the step of charging the integration capacitor.