US 11,982,776 B2
Piezoelectric transducer with model-based field equalization
Marek Hustava, Bratislava (SK); Jiri Kantor, Hrusky (CZ); and Tomas Suchy, Brno (CZ)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)
Filed on Nov. 9, 2021, as Appl. No. 17/522,019.
Claims priority of provisional application 63/198,768, filed on Nov. 11, 2020.
Prior Publication US 2022/0146653 A1, May 12, 2022
Int. Cl. G01S 7/52 (2006.01); G01S 7/526 (2006.01); G01S 15/931 (2020.01)
CPC G01S 7/52006 (2013.01) [G01S 7/526 (2013.01); G01S 15/931 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of operating a piezoelectric-based sensor, the method comprising:
sensing a response of a piezoelectric transducer as a function of frequency;
deriving parameter values of an equivalent circuit for the piezoelectric transducer from the response;
combining a stored compensation curve with a squared magnitude of a transfer function of the equivalent circuit to determine a system level selectivity, the stored compensation curve representing a difference between a previously measured system level selectivity curve and a squared transfer function magnitude curve; and
adapting at least one operating parameter of the sensor based on the system level selectivity.