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This paper presents a smart UHF near-field RFID system with contactless inductively coupled antenna. A fully integrated inductively coupled antenna is designed to solve the problem of short read distance of the On-chip Antenna (OCA) tag. The inductively coupled antenna used a novel cross structure to achieve resonant effect which also diminishes the size of the antenna. No physical connection between...
In this paper, a baseband transceiver is proposed for IEEE 802.15.4 and for one 2.4G RFID protocol. This transceiver supports OQPSK with direct sequence spread spectrum (DSSS), MSK without spread spectrum, and DBPSK with DSSS. In this design, those three demodulations share most of their hardware blocks to reduce area and power consumption. This baseband transceiver is part of a multi-mode and multi-band...
A fresh and creative passive UHF RFID tag, which can be referred to as "Chip-ID tag", has been proposed in this paper. The fully integrated Chip-ID tag, fabricated on the same substrate of the identified SOC, can be used for the SOC chip information identification, such as the chip manufacturer, function and series number identification, etc. The Chip-ID tag without OCA can be implemented...
A design of a low-power wireless System-on-Chip (SoC) for the Ligament Balance Measuring System (LBMS) in Total Knee Arthroplasty (TKA) is presented in this paper. It includes a signal conditioning circuit that can support up to 15 force sensors, a 433MHz RF front-end for data transmission, an 8-bit low-power microprocessor, and a FIFO with a digital filter. Idle and wake-up modes are well designed...
This paper describes a circuit design methodology to optimize both power and jitter performances of the inductorless voltage-controlled oscillators (VCOs) by utilizing an on-chip supply noise monitoring circuit. As the phase-locked loop (PLL) has a sensitive response to the noise frequency near the loop bandwidth, detecting low frequency tones up to the PLL bandwidth is considered for a supply noise...
An ultra-low-power system-on-a-chip (SoC) for wireless capsule endoscopes has been implemented, providing bidirectional communication between the capsule and the external data logger. The SoC is composed of a programmable UHF band transceiver with 3Mbps MSK transmitting and 64kbps OOK receiving, a 1.2V MCU with a dedicated image compressor, multiple on-chip voltage regulators, and etc. The SoC can...
This paper presents an energy-efficient SoC dedicated for portable medical monitoring and intervention systems capable of closed-loop control. The SoC contains a 0.9V/165μW MCU and a dual-band RF block including a 403MHz transceiver for data link and a 915MHz receiver for wake-up link. The data link transceiver is composed of a 200kbps FSK transmitter and a 64kbps OOK receiver, consuming 5.58mW and...
This paper presents a 2.4GHz, reconfigurable RF LNA using on-chip peak detection and calibration to measure and optimize its input impedance (S11) and gain (S21) in-situ, compensating for the unpredictable effects of process, voltage and temperature (PVT) variations. Measurement results show that the calibration of the LNA across PVT corners improves the S11 by 5.1dB, S21 by 3dB, while not significantly...
This paper presents a fully integrated single-chip UHF radio frequency identification (RFID) reader SoC for short distance handheld applications. The SoC integrates all building blocks-including an RF transceiver, a PLL frequency synthesizer, a digital baseband and a MCU-in a 0.18 ??m CMOS process. A high-linearity RX front-end and a low-phase-noise sythesizer are designed to handle the large self-interferer...
This paper discusses general procedures for simulation, design optimization, measurement and modeling of accurate and scalable on-chip RF spiral inductors in standard foundry CMOS for industrial applications. Electro-magnetic (EM) solver is used to simulate and optimize design of a library of inductors with various dimensions and specifications aiming to provide accurate and scalable inductors for...
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