Multi-Channel Signal-Generator ASIC for Acoustic Holograms

A complementary metal-oxide- semiconductor (CMOS) application-specific integrated circuit (ASIC) has been developed to generate arbitrary, dynamic phase patterns for acoustic hologram applications. An experimental prototype has been fabricated to demonstrate phase shaping. It comprises a cascadable...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2020-01, Vol.67 (1), p.49-56
Main Authors: Song, Rui, Richard, Grace, Cheng, Christopher You-Yee, Teng, Lijun, Qiu, Yongqiang, Lavery, Martin Philip John, Trolier-Mckinstry, Susan, Cochran, Sandy, Underwood, Ian
Format: Article
Language:English
Subjects:
Acoustic mapping
Acoustics
Application specific integrated circuits
Arrays
Clocks
CMOS
Delays
Digital-integrated circuits
Holograms
Holography
Integrated circuits
Micromachining
phase control
phased arrays
Piezoelectricity
Prototypes
scalability
Signal generators
Signal processing
Square waves
Transducers
Ultrasonic transducer arrays
Ultrasonic transducers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A complementary metal-oxide- semiconductor (CMOS) application-specific integrated circuit (ASIC) has been developed to generate arbitrary, dynamic phase patterns for acoustic hologram applications. An experimental prototype has been fabricated to demonstrate phase shaping. It comprises a cascadable 1 × 9 array of identical, independently controlled signal generators implemented in a 0.35-μm minimum-feature-size process. It can individually control the phase of a square wave on each of the nine output pads. The footprint of the integrated circuit is 1175 × 88 μm 2 . A 128-MHz clock frequency is used to produce outputs at 8 MHz with a phase resolution of 16 levels (4 bits) per channel. A 6 × 6 air-coupled matrix array ultrasonic transducer was built and driven by four ASICs, with the help of commercial buffer amplifiers, for the application demonstration. Acoustic pressure mapping and particle manipulation were performed. In addition, a 2 × 2 array piezoelectric micromachined ultrasonic transducer (PMUT) was connected and driven by four output channels of a single ASIC, demonstrating the flexibility of the ASIC to work with different transducers and the potential for direct integration of CMOS and PMUTs.
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2019.2938917