Ultrasound signal processor

Details Ultrasound signal processor Ultrasound signal processor

1993-09-22

1996-05-14

Chilcot, Richard

Measuring and testing

Vibration

By mechanical waves

73633, G01N 2900

Patent

active

055157270

ABSTRACT:
An ultrasound signal processor has a receiving signal digitizing circuit, waveform conversion circuit for mixing a produced digital signal by a reference signal, a cumulation circuit for performing a cumulation processing of a series of converted signals, a delay circuit subject to the cumulation processing, and a circuit for adding delayed signals, whereby the frequency of the receiving signal is shifted to a lower frequency and thereafter subjected to a cumulation processing which perform over-sampling technique so that the accuracy of an analog to digital conversion can be improved drastically. The ultrasound signal processor further has a circuit for converting a receiving signal into a low frequency signal by analog-mixing and a circuit for passing a low frequency component of the analog-converted signal, whereby a higher frequency receiving signal can be digitized even if the digitizing circuit has a insufficient sampling rate.

REFERENCES:
patent: 4226121 (1980-10-01), Knospler
patent: 4307616 (1981-12-01), Vasile
patent: 4841489 (1989-06-01), Ozaki et al.
patent: 5005419 (1991-04-01), O'Donnell
patent: 5027821 (1991-07-01), Hirama et al.
Japanese Patent Publication No.60-51068.
U.S. Pat. No. 4,140,022.

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