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公开(公告)号:USRE29844E
公开(公告)日:1978-11-21
申请号:US780314
申请日:1977-03-23
IPC分类号: H03F1/56
CPC分类号: H03F1/56
摘要: An amplifier having a combination of local series and shunt feedback to provide matched input and output impedances permitting cascading of a number of amplifiers or amplifiers and other devices without signal degradation. .Iadd.
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公开(公告)号:US5477858A
公开(公告)日:1995-12-26
申请号:US728830
申请日:1991-07-09
申请人: Paul R. Norris , John Folline , Richard H. Chesarek , Michael J. Veraya , James R. Chekerylla , Richard A. Revell , Thomas R. Clary , Richard K. Johnson , Lee D. Dunbar , David R. Axness , John C. Lazenby , Donald R. Gardner , William E. Crone , W. Gerrit Barrere , Charles C. Myrick , Bruce M. Pirie , Leonard D. Seader , Louis A. Heaton , David M. Polakowski , Brian J. Sargent
发明人: Paul R. Norris , John Folline , Richard H. Chesarek , Michael J. Veraya , James R. Chekerylla , Richard A. Revell , Thomas R. Clary , Richard K. Johnson , Lee D. Dunbar , David R. Axness , John C. Lazenby , Donald R. Gardner , William E. Crone , W. Gerrit Barrere , Charles C. Myrick , Bruce M. Pirie , Leonard D. Seader , Louis A. Heaton , David M. Polakowski , Brian J. Sargent
CPC分类号: G10K11/346 , A61B8/467 , G01S15/8918 , G01S15/8981 , G01S15/8988 , G01S15/899 , G01S7/52026 , G01S7/52033 , G01S7/52034 , G01S7/52069 , G01S7/52073 , G01S7/52084 , G06F19/3406 , G10K11/002 , G10K11/02 , A61B8/06 , A61B8/4281 , G06F19/3412
摘要: An ultrasound imaging system is provided which produces gray scale images of the anatomy simultaneous with Doppler signal processing so as to provide a single real-time image that shows not only the vascular anatomy and surrounding tissue but also flow events in the vascular compartment. A phased linear array having near-continuous focus over the scanning field provides high resolution and very small Doppler sample volumes. The system tests incoming signals from throughout the scanning field for amplitude, phase and frequency so as to determine B-mode data, motion presence and direction, and echo source velocity.
摘要翻译: 提供超声成像系统,其与多普勒信号处理同时产生解剖结构的灰度图像,以便提供不仅显示血管解剖结构和周围组织而且还显示血管隔室中的流动事件的单个实时图像。 在扫描场上具有近连续焦点的相控线性阵列提供高分辨率和非常小的多普勒样本体积。 该系统测量来自整个扫描场的入射信号的幅度,相位和频率,以便确定B模式数据,运动存在和方向以及回波源速度。
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公开(公告)号:US4454884A
公开(公告)日:1984-06-19
申请号:US423922
申请日:1982-09-27
申请人: Leonard D. Seader
发明人: Leonard D. Seader
CPC分类号: G01S7/52033
摘要: The wide dynamic range ultrasound receiver utilizes a multi-stage logarithmic amplifier in order to logarithmically amplify a returned echo signal. The output of the returned echo signal from the logarithmic amplifier is simply added to a saw-tooth wave Time Gain Control (TGC) signal. Thus, the wide dynamic range of the returned echo signals is simply converted into a video display.
摘要翻译: 宽动态范围超声波接收机利用多级对数放大器对数放大返回的回波信号。 来自对数放大器的返回回波信号的输出被简单地添加到锯齿波时间增益控制(TGC)信号。 因此,返回的回波信号的宽动态范围被简单地转换为视频显示。
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