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Random numbers play a vital role in cryptography, where they are used to generate keys, nonce, one-time pads, and initialization vectors for symmetric encryption. The quality of random number generator (RNG) has significant implications on vulnerability and performance of these algorithms. A pseudo-RNG uses a deterministic algorithm to produce numbers with a distribution very similar to uniform. True...
A DC-DC boost converter is fabricated using a SiC MOSFET and the characteristics are analyzed with SPICE simulation. We use a device model based on surface potential for SiC MOSFET, which was proposed this year by our group. It is found that the SPICE simulation well explains the experimental waveforms of the fabricated boost converter even at very high frequencies of 1–5 MHz. This result suggests...
In this paper, a novel circuit simulation model for V-groove SiC power MOSFET with buried P-layers is proposed. By considering the structure of the MOSFET, bias dependence of on-resistance and the kink in the terminal capacitance are represented in the proposed model. Through experiments using a V-groove SiC MOSFET, it is demonstrated that the proposed model successfully reproduces both I-V and C-V...
We propose a novel methodology for identifying thermal equivalent circuit of power MOSFETs through the measurement of thermal conduction characteristics. Drain current of the MOSFET is utilized to estimate channel temperature wherein heat is actually generated. Two measurement methods, i.e., constant voltage (CV) method and constant power (CP) method, are proposed. Those methods are different in the...
In this paper, we propose a surface-potential-based simulation model of SiC power MOSFETs for accurate circuit simulation. By considering physical structure and behavior of vertical power SiC MOSFETs, the proposed model reproduces static and dynamic characteristics upon wide range of bias voltages. Through experiments using a commercial SiC power MOSFET, good agreements have been observed between...
Sub- and near-threshold circuits have been attracting growing interests because they are suitable for realizing extremely low power and low energy circuits. The estimation of the minimum operating voltage (VDDmin), under which the circuit does not function correctly, is one of the most important issues in their design. In this paper, the distribution of VDDmin is explored through simulations and measurements...
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