发明名称 |
Ultrasound signal processor |
摘要 |
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.
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申请公布号 |
US5515727(A) |
申请公布日期 |
1996.05.14 |
申请号 |
US19930124555 |
申请日期 |
1993.09.22 |
申请人 |
HITACHI MEDICAL CORPORATION |
发明人 |
MIWA, YUICHI;KATAKURA, KAGEYOSHI;SHINOMURA, RYUICHI;MASUZAWA, HIROSHI;SATO, YUTAKA;ISHIKAWA, SHIZUO |
分类号 |
G01N29/07;G01N29/11;G01N29/36;G01N29/44;G01N29/46;G01S7/52;G10K11/34;(IPC1-7):G01N29/00 |
主分类号 |
G01N29/07 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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