Patent ID: 9224435
Filing Date: 2015-12-29
Classification: G11C,H03B

Abstract:
1. A Precision Voltage Reference (PVR) comprising: a resonator having an oscillation frequency, the resonator comprising: a phase shift module coupled to the resonator and configured to apply a phase shift to a pick-off signal from the resonator to generate a bias signal; an amplitude control module coupled to the resonator; a voltage source coupled to the at least one drive and the at least one sense plates; a reference oscillator configured to provide a reference signal having a reference frequency to the voltage source; an output; and a specific-force compensation module coupled to the output of the PVR and configured to be coupled to an accelerometer; wherein the voltage source is configured to provide the bias signal to the at least one drive and at least one sense plates of the resonator to drive the oscillation frequency of the resonator to match the reference frequency; wherein the amplitude control module is configured to adjust the bias signal provided to the at least one drive and the at least one sense plates to maintain a constant oscillation amplitude of the resonator; wherein the bias signal is also provided to the output of the PVR as a voltage reference signal; and wherein the specific-force compensation module is configured to adjust the voltage reference signal at the output based on a measured acceleration of the PVR received from the accelerometer.