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As ultrasound imagers become increasingly portable and lower cost, breakthroughs in transducer technology will be needed in order to provide excellent imaging (ideally 3D/4D) while maintaining the affordability needed for portable systems. This paper presents a 32×32 ultrasound array prototype, manufactured using a CMUT-in-CMOS approach whereby transducer elements and circuit components are integrated...
Integration of a 2D ultrasound transducer array with front-end signal conditioning electronics poses significant fabrication and packaging challenges due to the required number of elements and small element pitch. In this paper, we demonstrate a CMUT-in-CMOS approach that produces ultrasonic transducers and circuits on a single chip using a standard foundry CMOS process, augmented only with two blanket...
Bidirectional power-switching devices are needed in many power-management applications, particularly in lithium-ion battery protection circuitry. In this letter, a monolithic planar bidirectional power switch fabricated with a simplified CMOS technology is introduced. The new four-terminal device provides a blocking voltage greater than 20 V and a low on-resistance in either direction between its...
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