An Element-Matched Band-Pass Delta-Sigma ADC for Ultrasound Imaging

Michele D'Urbino, Chao Chen, Zhao Chen, Zu-Yao Chang, Jacco Ponte, Boris Lippe, Michiel Pertijs

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

3 Citations (Scopus)

Abstract

This work presents a compact ADC architecture capable of digitizing the signals received by every individual element of a 2D ultrasound transducer array. An element-matched layout of 150 μm × 150 μm is realized by exploiting each piezo-electric transducer element not only as the signal source, but also as the electro-mechanical loop-filter of a continuoustime band-pass ΔΣ ADC, thus minimizing the required circuit blocks. The transducer's frequency response, which is inherently matched with the signal bandwidth of interest, provides noise shaping to the ADC. A prototype chip has been fabricated in a 0.18 μm CMOS technology, featuring 20 ADCs located directly underneath a 150 μm-pitch piezo-electric transducer array fabricated on top of the chip. Each ADC, clocked at 200 MHz, consumes 800 μψ from a 1.8 V supply, and achieves an SNR of 47 dB in a 75% bandwidth around a center frequency of 5 MHz. Acoustic measurements show that the ADC successfully digitizes incoming echo signals.
Original languageEnglish
Title of host publication2017 IEEE Asian Solid-State Circuits Conference (A-SSCC))
Subtitle of host publicationProceedings of Technical Papers
Place of PublicationDanvers, MA
PublisherIEEE
Pages137-140
Number of pages4
ISBN (Electronic)978-1-5386-3178-2
DOIs
Publication statusPublished - 2017
EventA-SSCC 2017: 13th annual IEEE Asian Solid-State Circuits Conference - Grand Hilton Hotel, Seoul, Korea, Republic of
Duration: 6 Nov 20178 Nov 2017
Conference number: 13
http://www.asscc.org/

Conference

ConferenceA-SSCC 2017
CountryKorea, Republic of
CitySeoul
Period6/11/178/11/17
Internet address

Keywords

  • Band-pass ADC
  • Electro-mechanical Resonator
  • Tracking Quantizer
  • Inverter-based OTA

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