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Array Signal Processor is a complex ASIC which can perform Phased array beam forming of Ultrasound Sensor data up to 32 channels. The Array Signal Processor consists of Transmit Beam Former, Transducer, and Receive Former. The Array signal Processor works based on the principle of Pulse-echo Processing. When the voltage is applied to the transducer probe, pulses are produced due to piezoelectric effect...
The mobile virtualization technology provides a feasible way to improve the manageability and security for embedded systems. This paper presents an architecture named MobiXen to address these challenges. In the MobiXen, both Xen's physical memory space and virtual address space are shrunk as much as possible and thus Android owns more memory resource; optimizations are developed to reduce the virtualization...
A low power, low voltage rail-to-rail operational amplifier (opamp) was designed in a conventional 0.18mum CMOS process for implantable biomedical applications. The rail-to-rail constant gm input stage of the opamp utilizes both a native NMOS differential pair and a normal NMOS differential pair. Both differential pairs are operated in the subthreshold region. The gm variations in the overall input...
The Alfred Mann Foundation is completing development of a coordinated network of BION/spl reg/ microstimulator/sensor (hereinafter implant) that has broad stimulating, sensing and communication capabilities. The network consists of a master control unit (MCU) in communication with a group of BION implants. Each implant is powered by a custom lithium-ion rechargeable 10 mW-hr battery. The charging,...
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