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- W2034151128 abstract "To obtain a good dynamic range on echographic signals produced by broad-band piezoelectric arrays with frequencies > 4 MHz, it is necessary to excite each of the array elements with very fast electric spikes. Therefore, for most depths used in medical echographic visualization, or NDT applications, electric pulses of some hundreds of volts with a rise-time of < 30 ns are required. This Paper outlines an analysis of the required characteristics of the high voltage excitation stages for each of the elements of a linear piezoelectric array designed for scanning and electronic focussing. An efficient basic unit for multichannel pulse generation up to 500 V with a rise-time of 10 ns is described. This unit has been especially designed for the impulsional driving of broadband piezoelectric array elements in the frequency range 1–30 MHz. The generated electric pulse shape is studied as a function of the generator internal parameters and its external load, and some experimental results for different real transduction conditions are resented." @default.
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- W2034151128 date "1987-07-01" @default.
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- W2034151128 title "Broad-band driving of echographic arrays using 10 ns-500 V efficient pulse generators" @default.
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- W2034151128 doi "https://doi.org/10.1016/0041-624x(87)90037-0" @default.
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