Beamformed ultrasonic imager with delta-sigma feedback control
US6987474B2 · kind B2 · utility
50Cited by
6References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 26, 2004 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Oct 26, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/454
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are provided for reducing distortion in a dynamically delayed digital sample stream of an imaging system. The method includes the steps of delta-sigma modulating an input analog signal of the imaging system at a frequency above the Nyquist frequency of the input analog signal to generate a digital sample stream and changing a length of the sample stream to delay a portion of the sample stream while maintaining synchronism between a delta-sigma modulator and a demodulator of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.