an integrated full-bridge class-de ultrasound transducer driver for hifu applications
abstract
this thesis present a cmos integrated transducer driver for high intensity focused ultrasound
(hifu) applications. because this driver will be used in a magnetic resonance imaging (mri)
environment, no magnetic components such as inductors and transformers have been used in this
design. the transducer is directly connected to the driver without a matching network. the output
stage of this driver is a full-bridge class de rf amplifer which is able to deliver more power than
the previous design that has a half-bridge class de amplifer.
the driver was also designed to be used in a transducer array. a digital control unit was
integrated with the power amplifer that allows to program the drivers phase shift and duty ratio.
a strategy to drive a ultrasound transducer array using the designed driver is also presented in this
thesis.
this design was implemented using the ams h35b4 cmos technology using the cadence suite
of design tools and occupies a die area of 2mm by 1.5mm with 20 input and output pads. simulation
and initial experimental results are presented in this work. the proposed integrated cmos driver
has an efficiency of 89.4% with 3.60 w of output power. results are little bit different for each
transducer.
collections
related items
showing items related by title, author, creator and subject.
-
design methodology for class d ultrasound transducer drivers
jiang, yitong (2021)ultrasound refers to sound waves with frequencies above the upper limit of human hearing. due to the high frequency, the energy can be concentrated and used for therapeutic applications, such as ultrasound imaging ... -
computer simulation of functional materials for therapeutic ultrasound applications
ahmed, sheikh jamil (2015-01-13)magnetic resonance imaging guided high intensity focused ultrasound is a potential non-invasive treatment which uses constructive interference patterns to concentrate ultrasound energy generated by a piezoelectric ... -
an integrated ultrasound transducer driver for hifu applications
wong, wai (2014-01-22)this thesis proposes an mri-compatible integrated cmos ampli er that is capable of di- rectly driving an ultrasound transducer for hifu applications. the output stage of the integrated amplifier operates in class de mode ...