Patent ID: 8502519
Filing Date: 2013-08-06
Classification: G05F

Abstract:
1. A system for providing a low power reference voltage from a power supply that provides a power supply voltage that fluctuates over a range of voltages, the system comprising: a regulation circuit configured to generate an internal voltage from the power supply voltage, the internal voltage corresponding to a substantially constant voltage that is lower than the range of voltages; a reference voltage circuit coupled to the regulation circuit to receive the generated internal voltage and configured to generate a reference voltage from the internal voltage; a sample-and-hold storage circuit coupled to the reference voltage circuit that is configured to receive the generated reference voltage, store the reference voltage, and provide the stored voltage as an output; and a control circuit configured to cyclically couple the power supply for generating the reference voltage, and cyclically couple the sample-and-hold storage circuit for storing the reference voltage, as a function of circuit characteristics of the storage circuit and a circuit connecting the reference voltage to the sample-and-hold storage circuit.