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US 11,171,624 B2Granted
Voltage sensor device based on a tunable bulk acoustic wave (BAW) resonator
AssigneeTexas Instruments Incorporated
InventorsBaher Haroun, Bichoy Bahr
Life of this patent
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Abstract
A voltage sensor device includes an oscillator unit, the oscillator unit having a tunable bulk acoustic wave (BAW) resonator device and an oscillator core. The voltage sensor device also includes a frequency analyzer configured to obtain frequency measurements for the oscillator unit and to determine a voltage sense value based on a comparison of at least some of the obtained frequency measurements. The voltage sensor device also includes an output interface configured to store or output voltage sense values determined by the frequency analyzer.
Claims12
A voltage sensor, comprising:
- a first shield and a second shield disposed under a sensing surface, the first and second shield conductively connected to a ground terminal;
- a first oscillator having a first bulk acoustic wave (BAW) resonator and a first oscillator output, the first oscillator configured to provide at the first oscillator output a first signal that is shielded from effects of being proximate a sensing surface;
- a second oscillator having a second BAW resonator and a second oscillator output, the second oscillator configured to provide at the second oscillator output a second signal that is unshielded from effects of being proximate the sensing surface;
- a frequency analyzer having an analyzer output and first and second analyzer inputs, the first and second analyzer inputs respectively coupled to the first and second oscillator outputs, and the analyzer configured to compare the first and second signals and provide a voltage estimate at the analyzer output in response.
1 more element
Dependencies are inferred from the claim text.