This paper introduces a method to achieve fast scanning power supply for Proton Therapy. To meet the specific needs of this power supply, a new structure consists of dynamic module (high voltage part) and static module (low voltage part) has been designed and tested. The simulation results and actual waveform were listed in this paper. The results showed that the current rising slope can reach 90kA/s.
Network-on-chip (NoC) offers a scalable and flexible communication infrastructure for many-cores systems. Buffers in router is used for fine-grain flow control and Quality of Service (QoS), yet it is the major contributor of area and power consumption. In this paper, we propose a hybrid buffer design with SRAM and Spin-Torque Transfer Magnetic RAM (STT-RAM) for NoC router leveraging a novel architecture combined Virtual Channel (VC) and Virtual Output Queuing (VOQ) to store congested and uncongested flow separately. Experiments demonstrates that the proposed scheme can achieve 11.8% network performance improvement and 32.9% power saving with only 8.2% area overhead degradation compared to conventional SRAM based buffer design.
To solve the problem of the Wheatstone full-bridge unequal resistance and low calculation accuracy, a calculation model for temperature drift of Tunneling Magnetoresistance sensors without magnet field is proposed. Based on proportional relation, McLaurin’s series, and temperature coefficient of resistance, the model can explain the origin of sensor offset voltage, the influence of temperature on the sensor output voltage, and the high calculation accuracy. After the completion of the resistance inequality experiment and the temperature drift test without magnetic field, the experimental results show that the model data are consistent with the experimental data from 0 to 85°C, and the error is within 1%. After completing the magnetic field measurement experiments at different temperatures, it proves that the model is very accurate and can be applied to temperature software compensation.
In this study, we propose an Erbium-doped fiber (EDF) laser displacement sensor using bending characteristics of a cascaded-chirped long-period fiber grating (C-CLPG), in which the C-CLPG assisted by a Faraday rotator mirror (FRM), namely double-pass C-CLPG, shows a channeled spectrum and plays both the roles of wavelength tunable filter and sensor element. In the sensing scheme, the spectral shift of the channeled spectrum due to the displacement-induced bending deformation is utilized. Due to the FRM reflection, the double-pass C-CLPG has characteristics suitable for sensing: the polarization-independent channeled spectrum and the compensation effect for polarization variation in the sensor section. In the experiment, it is successfully demonstrated that the EDF laser in a sigma-type cavity configuration (EDFσL) using the double-pass C-CLPG enables precise displacement measurement based on the oscillation wavelength shift corresponding to the spectral shift of the double-pass C-CLPG. Further, the advantage of this EDFσL is confirmed by comparison with the conventional EDF ring laser using the single-pass C-CLPG.
Logic locking is an integrated circuits (ICs) protection technique that thwarts reverse engineering, IC overproduction, and IP piracy caused by untrusted foundry and end-users. After Boolean Satisfiability (SAT) solver was applied to crack the keys, researchers proposed various defenses against SAT, approximate, and removal attacks. The Valkyrie attack based on structural analysis has been recently presented that breaks all the existing combinational logic locking techniques. In this letter, we present Structural Interference Logic Locking (SILL) technique. SILL adds interference logic combined with traditional cryptographic logic to drive the primary output, which enables defense against structural attacks by assigning keys to the cryptographic and interference logic according to rules. According to the experimental results, SILL is between (k-4)-secure and (k-2)-secure against SAT Attack while defending against Valkyrie attack.