The Internet of Things requires greater attention to the security and privacy network. Compared other public-key cryptosystems, elliptic curve cryptography can provide better lower latency with shorter keys, rendering it more suitable for IoT security. This paper presents a high-efficiency low-delay cryptographic architecture based on NIST-p256 prime field applications. A modular square unit utilizes fast partial Montgomery reduction algorithm, demanding just mere four clock cycles complete...

Successive approximation register (SAR) analog-to-digital converters (ADC) have the advantages of a simple structure, low power consumption and small area compared with other types ADCs, thus, high-performance SAR ADCs always been hot research topic in industry. In this paper, 12-bit ADC design calibration using hybrid RC digital-to-analog converter(RC DAC) structure is proposed to improve conversion accuracy reduce circuit at same time. The analog supply voltage reference are 3.3 V, digital...

This paper presents a fully integrated high-frequency (HF) radio-frequency identification (RFID) tag chip based on the ISO/IEC 15693 and discusses series of design techniques, including analog digital control circuits. In order to get more coupled power supply, an amplitude shift keying demodulator with very low modulation index is proposed. Moreover, modulator, limiter, electrostatic discharge circuit are mentioned make IC work effectively reliably. Besides, 2-kbit EEPROM memory designed...

An NFC tag chip employing the ISO/IEC14443-A protocol is developed in SMIC 0.13 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\upmu$</tex-math> </inline-formula> m EEPROM 2P6M CMOS process, boasting a area of 620.03 notation="LaTeX">$\times$</tex-math> 567.93 and power consumption under 100 W. The addresses critical issues such as reducing minimizing costs for covering numerous IoT nodes. For small chip,...

The deployment and application of large-scale Internet Things require a large number 13.56-MHz radio-frequency identification (RFID) reader chips with lower cost. existing RFID module needs to integrate multiple chips, such as microcontroller high-frequency (HF) IC on single printed circuit board (PCB), which has the bottleneck cost, power consumption, stability, reliability. In order adapt development trend high integration, miniaturization, low-power consumption reader, this article...

The development and application of various precision electronic devices require a large number high-precision low-cost temperature-compensated crystal oscillators (TCXO) to generate frequency references. In order achieve higher compensation accuracy at lower cost, new fully integrated analog-TCXO (ATCXO) is proposed in this paper. It uses an innovative multiplier cubic quintic voltages. experimental results show that it can the ultra-high fitting frequency-temperature characteristic curve...

The traditional RFID reader module relies on a discrete original design. This design integrates microcontroller, high-frequency IC and other multiple chips onto PCB board, leading to bottlenecks in cost, power consumption, stability reliability. To align with the trend towards high integration, miniaturization low consumption reader, this paper introduces fully integrated Reader SoC. SoC employs open-source Cortex-M0 core integrate RF transceiver, analog circuits, baseband protocol...

RFID has been widely developed during these years, and massive size of the market. However, security communication faces with many challenges its development. In order to strengthen as well reduce power consumption manufacturing cost, this paper researches implements a low-power high-security authentication system. For sake authentication, we design random number generator which makes attackers impossible predict what transmit between reader tag. To enhance capability encryption RFID,...

Abstract This paper presents a high‐precision, low‐power delta‐sigma modulator (DSM) designed for healthcare and medical diagnostics. It utilizes hybrid switching integrator to reduce distortion caused by the non‐linear on‐resistance of switches at low supply voltage. Leveraging characteristics integrator, non‐50% duty cycle sampling timing corresponding tunable Miller‐compensated operational transconductance amplifier are proposed resistor thermal noise meet lower power consumption...

Turbo code is an error correction coding scheme close to the Shannon limit, usually used in wireless data transmission.Based on parallel algorithm, a circuit design proposed.In encoder, recursive systematic convolutional encoder multiplexed.The decoder divided into branch metric, recursive, maximum likelihood ratio, and external information calculation modules.The decoding algorithm based Max-Log-MAP, controlling component parallel.And state metric combined reduce overall power consumption...

CAPTCHA (also known as verification code) is mainly used to guarantee the login security of interactive websites. At present, most popular code image which can distinguish human user from computer by identifying characters in image. Although safe at beginning, great deals CAPTCHAs have been cracked computers along with development processing technology and artificial intelligence technology. This paper presents a new dynamic based on inverted color. The color background are respectively,...

This paper analyzes the optimal control of wireless remote pruning machine based on complex programmable logic device (CPLD). The power circuit and safety are all designed analyzed. appropriate choice electronic devices reasonable law applied for different circuit. Firstly, by using new idea "power switch" in transmitting system, lifespan chargeable battery is extended strongly. Secondly, accuracy improved self-retain cutoff delaying supply receiving system. And last ignition engine...