发明名称 |
UN APARATO PARA EXAMINAR UN OBJETO MEDIANTE LA EMISION DE SENALES ULTRASONICAS Y EL REGISTRO DE LAS SENALES DE ECO RE- FLEJADAS DESDE EL MISMO. |
摘要 |
<p>An ultrasound examination apparatus comprises a processing circuit for echo signals from a mosaic of ultrasonic transducers which are made of an electrostrictive material with a non-remanent polarization. These signals are applied to processing channels which comprise coupling means (10i) for coupling the electrodes of the transducers to a circuit (20) for generating a polarization voltage ramp whose waveform is the inverse of that of the attenuation curve of the ultrasonic signals in the structures examined. These coupling means, for example, an RC circuit (11i, 12i) or a transformer (13i) enable the polarization voltage to be applied to the electrodes while inhibiting the transmission to the part of the processing channels which is situated behind the coupling means.</p> |
申请公布号 |
ES500469(D0) |
申请公布日期 |
1982.08.16 |
申请号 |
ES19690005004 |
申请日期 |
1981.03.18 |
申请人 |
N.V.PHILIPS'GLOEILAMPENFABRIEKEN |
发明人 |
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分类号 |
A61B8/00;G01N29/44;G01S7/523;G10K11/34;H04R17/08;(IPC1-7):04R17/00;04R3/00;01S15/02 |
主分类号 |
A61B8/00 |
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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