Bilayer ultrasonic transducer having reduced total electrical impedance
US5598051A · kind A · utility
19Cited by
16References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1994 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | Nov 21, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/064
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ultrasonic transducer having reduced total electrical impedance is constructed by stacking a plurality of piezoelectric transducer element arrays on top of each other. For a given thickness, the electrical impedance of a multilayer stack of piezoelectric transducer element arrays is a function of the number of layers. If the number of layers equals two, then the electrical impedance of the total stack-up of layers is reduced by a factor of one-quarter relative to the electrical impedance of a single layer of equal thickness. This facilitates matching the overall transducer impedance to that of the connecting cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.