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A feature-vector-generation VLSI architecture has been developed aiming at building real-time image recognition systems based on the directional edge based algorithm. The functional cache memory developed in the present work cyclically buffers newly extracted edge flags from an input image, while supplying edge flags to a vector generation circuitry. As a result, it has become possible to generate...
We have developed two CMOS devices to demonstrate the use of CMOS technology for neural imaging and interfacing with the aim of studying the functions of the brain at the molecular level. In this work, we discuss the design, packaging, and implementation of a compact, single device imaging system for imaging inside the mouse brain. We show that the device is capable of imaging and measuring fluorophore...
First prototype flex power FPGA chip is presented. Basic concept of flex power FPGA is to control speed/power trade-off relationship flexibly by assigning the proper threshold voltage generated from body-bias control circuits to transistors. An experimental chip, which implements a power configurable block array connected in series having minimal indispensable functions to flex power FPGA, i.e. circuit...
A 1-GHz input bandwidth 6-bit analog-to-digital (A/D) converter is described. The A/D converter is designed for an ultra-wideband impulse radio (UWB-IR) receiver that needs to digitize an input signal with a higher frequency than the sampling frequency. With the proposed under-sampling technique, sampling is executed with low-current consumption by separating a sampling capacitor from an operational...
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