Method and circuit for operating electro-acoustic transducers for reception and transmission using ring-down parameters
US11696072B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 2021 |
| Grant date | Jul 4, 2023 |
| Priority date | — |
| Expiry date | Nov 2, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electro-acoustical transducer such as a Piezoelectric Micromachined Ultrasonic Transducers is coupled with an adjustable load circuit having a set of adjustable load parameters including resistance and inductance parameters. Starting from at least one resonance frequency or at least one ring-down parameter of the electro-acoustical transducer a set of model parameters is calculated for a Butterworth-Van Dyke (BVD) model of the electro-acoustical transducer. The BVD model includes an equivalent circuit network having a constant capacitance coupled to a RLC branch and the adjustable load circuit is coupled with the electro-acoustical transducer at an input port of the equivalent circuit network of the model of the electro-acoustical transducer. The adjustable load parameters are adjusted as a function of the set of model parameters calculated for the BVD model of the electro-acoustic transducer to increase the bandwidth or the sensitivity of the electro-acoustic transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.