The integration of 2D ultrasonic transducer arrays and pitch-matched ASICs has enabled the realization of various 3D ultrasound imaging devices in recent years -. As applications such as 3D intravascular ultrasonography, intra-cardiac echocardiography, and trans-fontanelle ultrasonography call for miniaturization and improved spatial resolution, higher-frequency transducers (>5MHz) with a correspondingly smaller array pitch (<150m) are needed. Such devices generally employ a large number of transducer elements, calling for channel-count reduction in the ASIC while meeting stringent restrictions on per-element power consumption and die area. Micro-beamforming (BF) is an effective way of reducing channel count by performing a delay-and-sum operation on the echo signals received within a sub-array . However, prior BF implementations employ per-element capacitive memory to realize the delay , , making it increasingly difficult to apply BF in smaller-pitch arrays.
|Title of host publication||2022 IEEE International Solid-State Circuits Conference, ISSCC 2022|
|Subtitle of host publication||Digest of technical papers|
|Editors||Laura C. Fujino|
|Place of Publication||Danvers|
|Number of pages||3|
|Publication status||Published - 2022|
|Event||2022 IEEE International Solid- State Circuits Conference (ISSCC) - Online at San Francisco, United States|
Duration: 20 Feb 2022 → 26 Feb 2022
|Name||Digest of Technical Papers - IEEE International Solid-State Circuits Conference|
|Conference||2022 IEEE International Solid- State Circuits Conference (ISSCC)|
|Abbreviated title||ISSCC 2022|
|City||Online at San Francisco|
|Period||20/02/22 → 26/02/22|
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