ASIC Design of Encoding Circuit in Low Frequency Read-only RFID in Manufacturing Engineering

2013 ◽  
Vol 340 ◽  
pp. 792-796 ◽  
Author(s):  
Peng Fei Lai ◽  
Wei Ping Jing
Keyword(s):  
Design Method ◽  
Low Frequency ◽  
High Accuracy ◽  
Cmos Process ◽  
Phase Encoding ◽  
Rfid Tag ◽  
Asic Design ◽  
Custom Design ◽  
Manufacturing Engineering ◽  
Chip Testing

For the two kinds of commonly used codes in low frequency read-only RFID tag: Manchester encoding and Differential Bi-Phase encoding, we designed the corresponding encoding circuit, as shown in Fig. 5 and Fig. 10. It was fabricated by SMIC 0.35um CMOS process through full custom design method and has been successfully applied to a read-only RFID tag based on ISO/IEC 11784/5 standard. The chip testing result shows that the designed circuit can achieve ideal encoding effect, as shown in Fig. 14 and Fig. 15, which possesses the properties of high accuracy and strong anti-disturbance.

scholarly journals STUDY OF METHODS FOR REDUCING POWER CONSUMPTION AND AREA FOR A DIGITAL PART OF THE RFID-TAG

2020 ◽  
Author(s):  
Kirill Liubavin ◽  
Alexander Losevskoy ◽  
Igor Ermakov
Keyword(s):  
Power Consumption ◽  
Power Saving ◽  
Low Frequency ◽  
Reducing Power ◽  
Cmos Process ◽  
Rfid Tag ◽  
Dynamic Power ◽  
Digital Part ◽  
Cmos Processes

The results of the development of a digital part for the low-frequency RFID tag and the results of power saving methods study in 180 nm, 90 nm and 45 nm CMOS processes are presented. Using of the presented methods allows to reduce the power consumption and area of the digital part by 400 % and by 50 %, respectively. For the target 180 nm CMOS process the maximum dynamic power is less than 1 μW, and the occupied area is 0.042 mm2.

Low-Power Digital Part Design for a LF RFID tag in a Double-Poly 180 nm CMOS Process

2021 ◽  
Author(s):  
Kirill D. Liubavin ◽  
Igor V. Ermakov ◽  
Alexander Y. Losevskoy ◽  
Andrey V. Nuykin ◽  
Alexander S. Strakhov
Keyword(s):  
Low Power ◽  
Cmos Process ◽  
Rfid Tag ◽  
Digital Part

scholarly journals A Study on the Variable Inductor Design by Switching the Main Paths and the Coupling Coils

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1856
Author(s):  
Yen-Chung Chiang ◽  
Juo-Chen Chen ◽  
Yu-Hsin Chang
Keyword(s):  
Design Method ◽  
The Other ◽  
Cmos Process ◽  
Mos Transistors ◽  
Quality Factors ◽  
Process Technology ◽  
Variation Versus ◽  
Variable Inductor ◽  
Metal Layers ◽  
Coupled Coils

In a radio frequency (RF) system, it is possible to use variable inductors for providing tunable or selective frequency range. Variable inductors can be implemented by the microelectromechanical system (MEMS) process or by using transistors as switches to change the routing of coils or coupling quantities. In this paper, we investigated the design method of a variable inductor by using MOS transistors to switch the main coil paths and the secondary coupled coils. We observed the effects of different metal layers, turn numbers, and layout arrangements for secondary-coupled coils and compared their characteristics on the inductances and quality factors. We implemented two chips in the 0.18 m CMOS process technology for each kind of arrangement for verification. One inductor can achieve inductance values from about 300 pH to 550 pH, and the other is between 300 pH and 575 pH, corresponding to 59.3% and 62.5%, respectively, inductance variation range at 4 GHz frequency. Additionally, their fine step sizes of the switched inductances are from 0.5% to 6% for one design, and 1% to 12.5% for the other. We found that both designs achieved a large inductance tuning range and moderate inductance step sizes with a slight difference behavior on the inductance variation versus frequency.

scholarly journals An Improved Time Integration Method Based on Galerkin Weak Form with Controllable Numerical Dissipation

2021 ◽  
Vol 11 (4) ◽  
pp. 1932
Author(s):  
Weixuan Wang ◽  
Qinyan Xing ◽  
Qinghao Yang
Keyword(s):  
High Frequency ◽  
Integration Method ◽  
Time Integration ◽  
Low Frequency ◽  
Weak Form ◽  
High Accuracy ◽  
Numerical Dissipation ◽  
Frequency Range ◽  
Time Integration Method ◽  
Numerical Damping

Based on the newly proposed generalized Galerkin weak form (GGW) method, a two-step time integration method with controllable numerical dissipation is presented. In the first sub-step, the GGW method is used, and in the second sub-step, a new parameter is introduced by using the idea of a trapezoidal integral. According to the numerical analysis, it can be concluded that this method is unconditionally stable and its numerical damping is controllable with the change in introduced parameters. Compared with the GGW method, this two-step scheme avoids the fast numerical dissipation in a low-frequency range. To highlight the performance of the proposed method, some numerical problems are presented and illustrated which show that this method possesses superior accuracy, stability and efficiency compared with conventional trapezoidal rule, the Wilson method, and the Bathe method. High accuracy in a low-frequency range and controllable numerical dissipation in a high-frequency range are both the merits of the method.

scholarly journals A Novel Ultrasonic TOF Ranging System Using AlN Based PMUTs

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 284
Author(s):  
Yihsiang Chiu ◽  
Chen Wang ◽  
Dan Gong ◽  
Nan Li ◽  
Shenglin Ma ◽  
...  
Keyword(s):  
Clock Cycle ◽  
High Accuracy ◽  
Ultrasonic Waves ◽  
Oxide Semiconductor ◽  
Average Error ◽  
Cmos Process ◽  
Clock Frequency ◽  
Time Frequency ◽  
Range Finding ◽  
Wide Range

This paper presents a high-accuracy complementary metal oxide semiconductor (CMOS) driven ultrasonic ranging system based on air coupled aluminum nitride (AlN) based piezoelectric micromachined ultrasonic transducers (PMUTs) using time of flight (TOF). The mode shape and the time-frequency characteristics of PMUTs are simulated and analyzed. Two pieces of PMUTs with a frequency of 97 kHz and 96 kHz are applied. One is used to transmit and the other is used to receive ultrasonic waves. The Time to Digital Converter circuit (TDC), correlating the clock frequency with sound velocity, is utilized for range finding via TOF calculated from the system clock cycle. An application specific integrated circuit (ASIC) chip is designed and fabricated on a 0.18 μm CMOS process to acquire data from the PMUT. Compared to state of the art, the developed ranging system features a wide range and high accuracy, which allows to measure the range of 50 cm with an average error of 0.63 mm. AlN based PMUT is a promising candidate for an integrated portable ranging system.

High-accuracy digitized phase-sensitive demodulation ASIC design for silicon microgyroscope

2018 ◽  
Vol 26 (9) ◽  
pp. 2159-2168
Author(s):  
赵 阳 ZHAO Yang ◽  
夏国明 XIA Guo-ming ◽  
施 芹 SHI Qin ◽  
裘安萍 QIU An-ping
Keyword(s):  
High Accuracy ◽  
Asic Design ◽  
Phase Sensitive

A reconfigurable membrane-type acoustic metasurface for low-frequency and broadband wave front modulation

2019 ◽  
Vol 33 (19) ◽  
pp. 1950208
Author(s):  
Xinpei Song ◽  
Tianning Chen ◽  
Jian Zhu ◽  
Yanbin He
Keyword(s):  
Wave Front ◽  
High Speed ◽  
Power Transmission ◽  
Design Method ◽  
Real Life ◽  
Low Frequency ◽  
Pumping System ◽  
Unit Cells ◽  
Membrane Type ◽  
Structure Complexity

Low-frequency and broadband are the critical challenges in real-life applications. Here, we try to tackle the challenges by proposing a reconfigurable acoustic metasurface (AM) composed of the membrane-type metamaterial (MAM) structure of deep sub-wavelength scale. By employing the external air pumping system into each individual unit cell of the AM, the tension of the membrane can be readily tailored by the system with little interference from other unit cells. Two strategies of the constant pressure method (CPM) and constant volume method (CVM) are reported to design the MAM. And the CVM is adopted as the ultimate design strategy by comparing both methods from aspects of the dimension, operating frequency, and structure complexity. In order to validate the low-frequency and broadband performances of the AM, the Airy-like beams and the acoustic converging based on two identical Airy-like beams are introduced and proof-of-concept simulations are performed with the finite element method. The simulated results agree well with the theoretical predictions. Our design provides the little-interference active design method for the low-frequency and broadband AM to manipulate the wave front, and may have practical engineering applications in areas of the aerospace, high-speed train, marine vessel, and power transmission and transformation project.

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