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A multichannel pipeline analog-to-digital converter for an integrated 3-D ultrasound imaging system

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4 Author(s)
Kaviani, K. ; Center for Integrated Syst., Stanford, CA, USA ; Oralkan, O. ; Khuri-Yakub, P. ; Wooley, B.A.

An 8-channel 10-bit pipeline analog-to-digital converter, designed for use in an integrated three-dimensional ultrasound imaging system, has been implemented in a 0.25-μm CMOS technology. Two parallel multiplexing sample-and-hold stages are employed to multiplex a total of eight adjacent ultrasound channels, each sampled at 20 MHz. The sampled and multiplexed signals are fed into two parallel time-interleaved pipeline paths, each operating at 80 MHz. The two parallel pipelines are subsequently multiplexed into a single pipeline operating at 160 MHz to conserve area and reduce complexity. An experimental prototype of the proposed architecture occupies less than 4 mm2 of active silicon area and shows a peak signal-to-noise-plus-distortion ratio more than 54 dB for a 2.1-MHz input signal, while dissipating only 20 mW of analog power per input channel from a 2.5-V supply.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:38 ,  Issue: 7 )

Date of Publication:

July 2003

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