An analog beam-forming circuit for ultrasound imaging usingswitched-current delay lines |
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Authors: | Stefanelli B. O'Connor I. Quiquerez L. Kaiser A. Billet D. |
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Affiliation: | IEMN Dept., ISEN, Lille; |
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Abstract: | A mixed-signal integrated circuit implements 1120 analog memory points arranged in 16 independent fully programmable delay lines in a 0.8 μm CMOS technology. It demonstrates the feasibility of large scale mixed-mode circuits using the switched current technique. The die area of the chip is 72 mm2 and incorporates 16 rather large and complex analog blocks, which take advantage of special design techniques developed in order to keep power consumption at a reasonable level and to eliminate second-order effects due to long power and signal lines. At the nominal 64 MHz sampling rate, harmonic distortion is -48 dB, dynamic range is above 60 dB, and power consumption is 1.22 W from a single 5 V supply |
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