Ultrasonic echography apparatus utilizing a digital device for forming channels, in the receiving mode
US5088496A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Sep 28, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/52046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic echography apparatus, comprising a device for forming M channels which comprises, for each channel an analog-to-digital converter a delay line for introducing a delay with a step of 1/f.sub.e, and a circuit for interpolation and selection from N samples for each input sample, which circuit is formed by: PA0 N parallel processing chains (j=1, . . . , N), N-1 of the chains comprising a respective digital filter for interpolation with a shift j/Nf.sub.e with respect to the non-interpolated signal of the N.sup.th chain, the N.sup.th chain comprising a compensation delay line to compensate for the delay introduced by the interpolation filter, PA0 and a multiplexer (422.sub.i) for the N parallel chains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.