A pixel pitch-matched ultrasound receiver for 3-d photoacoustic imaging with integrated delta-sigma beamformer in 28-nm UTBB FD-SOI

Man Chia Chen, Aldo Pena Perez, Sri-Rajasekhar Kothapalli, Philippe Cathelin, Andreia Cathelin, Sanjiv Sam Gambhir, Boris Murmann

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper presents a pixel pitch-matched readout chip for 3-D photoacoustic (PA) imaging, featuring a dedicated signal conditioning and delta-sigma modulation integrated within a pixel area of 250 μm by 250 μm. The proof-of-concept receiver was implemented in an STMicroelectronics's 28-nm Fully Depleted Silicon On Insulator technology, and interfaces to a 4 × 4 subarray of capacitive micromachined ultrasound transducers (CMUTs). The front-end signal conditioning in each pixel employs a coarse/fine gain tuning architecture to fulfill the 90-dB dynamic range requirement of the application. The employed delta-sigma beamforming architecture obviates the need for area-consuming Nyquist ADCs and thereby enables an efficient in-pixel A/D conversion. The per-pixel switched-capacitor Δ Σ modulator leverages slewing-dominated and area-optimized inverter-based amplifiers. It occupies only 1/4th of the pixel, and its area compares favorably with state-of-the-art designs that offer the same SNR and bandwidth. The modulator's measured peak signal-to-noise-and-distortion ratio is 59.9 dB for a 10-MHz input bandwidth, and it consumes 6.65 mW from a 1-V supply. The overall subarray beamforming approach improves the area per channel by 7.4 times and the single-channel SNR by 8 dB compared to prior art with similar delay resolution and power dissipation. The functionality of the designed chip was evaluated within a PA imaging experiment, employing a flip-chip bonded 2-D CMUT array.

Original languageEnglish (US)
Article number8068946
Pages (from-to)2843-2856
Number of pages14
JournalIEEE Journal of Solid-State Circuits
Volume52
Issue number11
DOIs
StatePublished - Nov 1 2017

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Photoacoustic effect
Ultrasonics
Pixels
Imaging techniques
Beamforming
Modulators
Transducers
Signal processing
Delta sigma modulation
Silicon on insulator technology
Bandwidth
Energy dissipation
Capacitors
Tuning
Experiments

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Chen, Man Chia ; Pena Perez, Aldo ; Kothapalli, Sri-Rajasekhar ; Cathelin, Philippe ; Cathelin, Andreia ; Gambhir, Sanjiv Sam ; Murmann, Boris. / A pixel pitch-matched ultrasound receiver for 3-d photoacoustic imaging with integrated delta-sigma beamformer in 28-nm UTBB FD-SOI. In: IEEE Journal of Solid-State Circuits. 2017 ; Vol. 52, No. 11. pp. 2843-2856.
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A pixel pitch-matched ultrasound receiver for 3-d photoacoustic imaging with integrated delta-sigma beamformer in 28-nm UTBB FD-SOI. / Chen, Man Chia; Pena Perez, Aldo; Kothapalli, Sri-Rajasekhar; Cathelin, Philippe; Cathelin, Andreia; Gambhir, Sanjiv Sam; Murmann, Boris.

In: IEEE Journal of Solid-State Circuits, Vol. 52, No. 11, 8068946, 01.11.2017, p. 2843-2856.

Research output: Contribution to journalArticle

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