Protection Circuits for Very High Frequency Ultrasound Systems
نویسندگان
چکیده
منابع مشابه
Anterior segment biometry using ultrasound biomicroscopy and the Artemis-2 very high frequency ultrasound scanner
PURPOSE To compare the precision of anterior chamber angle (ACA) and anterior chamber depth (ACD) measurements taken with ultrasound biomicroscopy (UBM) and the Artemis-2 Very High Frequency Ultrasound Scanner (VHFUS) in normal subjects. DESIGN Prospective study. METHODS We randomly selected one eye from each of 59 normal subjects in this study. Two subjects dropped out of the study; the as...
متن کاملAnalysis and Design of ESD Protection Circuits for High-Frequency/RF Applications
Electrostatic discharge (ESD) protection devices can have an adverse effect on the performance of high frequency and RF circuits. This work presents for the first time, an s-parameter based analysis of the performance of RF circuits with various ESD protection designs. Additionally, a design methodology for distributed ESD protection using coplanar waveguides is developed to achieve a better im...
متن کاملCrossed SMPS MOSFET-based protection circuit for high frequency ultrasound transceivers and transducers
BACKGROUND The ultrasonic transducer is one of the core components of ultrasound systems, and the transducer's sensitivity is significantly related the loss of electronic components such as the transmitter, receiver, and protection circuit. In an ultrasonic device, protection circuits are commonly used to isolate the electrical noise between an ultrasound transmitter and transducer and to minim...
متن کاملSchlieren metrology for high frequency medical ultrasound.
The increased use of medical ultrasound above 40 MHz poses the challenge of measuring beam features that may be less than 40 microm. We have successfully used the optical Schlieren technique for transducers operating as high as 110 MHz. After a brief discussion of the technique, results are presented, including comparisons to state-of-the-art hydrophones and wire targets.
متن کاملPassive Materials for High Frequency Ultrasound Transducers
In this paper, the elastic properties of passive materials (matching, backing and lens materials) for ultrasound transducers are explored at room temperature in the frequency range of 25-65MHz using the ultrasonic spectroscopy method. AlurninaJEPOTEK 301 and tungsten/EPO-TEK 301 composites were fabricated and measured. Experimental results display a monotonic rise in acoustic impedance of the c...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Medical Systems
سال: 2014
ISSN: 0148-5598,1573-689X
DOI: 10.1007/s10916-014-0034-0