Bias control of electrostatic transducers
US6795374B2 · kind B2 · utility
102Cited by
8References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2001 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Sep 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/021
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system for controlling bias voltage for use with an electrostatic transducer are provided. The bias voltage is dynamically varied or set as a function of imaging mode, depth gain compensation, elevational apodization, azimuthal apodization, timing with respect to the transmit waveform, center frequency of transmit and receive waves and desired modulation. Opposite polarity on sub-elements is also provided for removing signals from electromagnetic interference and crosstalk between elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.