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There is an increasing demand for clear and accurate images in both extreme brightness and darkness, therefore imposing a challenge to pixel design. We present in this paper a detailed review of a pixel consisting of a photodetector and a tailored readout integrated circuit that features a good detection sensitivity of 63.4 mV/μA besides enabling a very High Dynamic Range (HDR) of 133 dB. The circuit...
Digital video capturing generates a huge amount of data to be processed and stored, which requires the use of compression techniques. Efficient hardware designs for real-time encoding are mandatory, especially for embedded systems, due to their performance and energy constraints. High Dynamic Range (HDR) video is a new technology that tends to be present in the next generation of devices in order...
Stereo matching systems that generate dense, accurate, robust and real-time disparity maps are quite attractive for a variety of applications. Most of the existing stereo matching systems that fulfill to all of these requirements adopt the Semi-Global Matching (SOM) technique. This work proposes a scalable architecture based on a systolic array, fully pipeline. The design builds on a combination of...
The HEVC standard is one of the newest video coding standards developed to face the upcoming challenges concerning video processing. HEVC allows only one type of entropy encoder, which is the CABAC (Context Adaptive Binary Arithmetic Coding), responsible for the symbolic data representation in order to translate the final video bitstream to a smaller number of bits. This work presents hardware architecture...
Among the new technologies that have emerged in the past few years to address the limits of CMOS, Nanomagnetic Logic (NML) is one of the most promising. NML circuits are composed of nanosized elongated magnets that operate at room temperature with ultra-low switching power dissipation. To create an NML circuit, the designer must place the magnets in such a way that, through magnetostatic interactions,...
In this work a model of the oscillator with inductive coupling of the gates operating at ultralow voltage is presented and experimentally verified. The topology needs a bias voltage at the gates, and we propose a circuit called starting block to generate this voltage from the supply. Theoretical behavior is compared with experimental results, showing good agreement. The circuit, which behaves as astable...
This work presents a low-area scalable architecture for the Depth Modelling Mode 1 (DMM-1) encoder of the 3D High Efficiency Video Coding (3D-HEVC) standard, removing the refinement stage. This simplification causes a small BD-rate increase (0.09%) but a significant reduction in memory usage of 30%. The scalable architecture can support different block sizes. Synthesis results for ST 65 nm Standard...
Detecting local light incident angle is a desirable feature for CMOS image sensors for 3D image reconstruction purposes. Advances in the CMOS technologies in the last years have enabled integrated solutions to perform such a job. However, it is still not viable to implement such a feature in regular CMOS image sensors due to the great number of pixels in a cluster to perform incident angle detection...
Several electronic systems such as implants and wireless sensors networks could benefit from compact transformers. In this paper, the development of microtransformers on a MCM (Multi Chip Module) platform is presented. The windings were manufactured using wirebonding of Au wires. Electrical characterization of the prototypes showed results as good as those built with printed circuit boards, providing...
This paper presents an integrated Analog Delay Line (ADL) for analog RF signal processing. The design is inspired by a Bucket Brigade Device (BBD) structure. It transfers charges from a sampled input signal stage after stage. It belongs to the Charge Coupled Devices (CCD). This ADL is fully differential with Common Mode (CM) control. The 28nm Fully Depleted Silicon on Insulator (FDSOI) Technology...
For super-regenerative oscillators (SRO), a principal component that determines several aspects of the system response is the quench signal generation. The high oscillation frequency of mm-wave SROs enables fast quench rates that could well exceed 10 GHz. This is desirable because higher symbol rates and, consequently, higher communication data rates could be achieved. This work presents a limiting...
Multiple Cell Upsets (MCUs) induced by ionizing radiation in memories are becoming more likely to happen due to the continuous technology scaling down. Error Correction Codes (ECCs) are applied for recovering the stored information into its original state providing reliable computer systems. Several ECC are able to deal with MCUs, however, the higher the robustness of an ECC, more area, and energy...
Video coding has become widespread through mobile devices. At the same time, the adopted resolutions have been enlarged, demanding more coding efficiency and motivating the development of the new state-of-the-art standard, High Efficiency Video Coding (HEVC). However, to achieve the required efficiency the new standard greatly increased the computational intensity. That, allied to real-time constraints...
Nowadays, the amount of small devices performing any kind of Digital Signal Processing (DSP) has increased drastically. On the other hand, the limited energy available to such battery-powered devices is a real problem. In DSP applications, one of the most important operations is the Finite Impulse Response (FIR) filter computation. The main FIR filter characteristics are the linear phase and feed...
This work proposes a decoder implementation for high-rate generalized concatenated (GC) codes. The proposed codes are well suited for error correction in flash memories for high reliability data storage. The GC codes are constructed from inner extended binary Bose-Chaudhuri-Hocquenghem (BCH) codes and outer Reed-Solomon (RS) codes. The extended BCH codes enable high-rate GC codes. Moreover, the decoder...
Many-core systems are increasingly popular in embedded systems due to their high-performance and flexibility to execute different workloads. These many-core systems provide a rich processing fabric but lack the flexibility to accelerate critical operations with dedicated hardware cores. Modern Field Programmable Gate-Arrays (FPGAs) evolved to more than reconfigurable devices, providing embedded hard-core...
Support Vector Machines (SVMs) are supervised learning models of the machine learning field whose performance strongly depended on its hyperparameters. The Bio-inspired Optimization Tool for SVM (BIOTS) tool is based on a Multi-Objective Particle Swarm Algorithm (MOPSO) to tune hyperparameters of SVMs. In this work, BIOTS is proposed along with a custom hardware design generator (VHDL) that implements...
In this work1 we present the design of a fully integrated wideband high efficiency power amplifier for 5G applications. The amplifier consists of two single ended common source stages, with a class-J power stage in the 28nm CMOS FD-SOI technology. Post-layout simulation results show a broadband behavior of the amplifier over 12 GHz of bandwidth with a saturated power of 16.2 dBm and a peak power added...
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