Iet Circuits Devices & Systems最新文献_第2页

A Process Optimization Method of the Mini-LOCOS Field Plate Profile for Improving Electrical Characteristics of LDMOS Device 一种改善LDMOS器件电学特性的Mini-LOCOS场板廓形工艺优化方法

4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-10-31 DOI: 10.1049/2023/5298361

Shaoxin Yu, Weiheng Shao, Pei-Xiong Gao, Xiang Li, Rongsheng Chen, Bin Zhao

{"title":"A Process Optimization Method of the Mini-LOCOS Field Plate Profile for Improving Electrical Characteristics of LDMOS Device","authors":"Shaoxin Yu, Weiheng Shao, Pei-Xiong Gao, Xiang Li, Rongsheng Chen, Bin Zhao","doi":"10.1049/2023/5298361","DOIUrl":"https://doi.org/10.1049/2023/5298361","url":null,"abstract":"In this work, the effects of the mini-local oxidation of silicon (LOCOS) field plate’s bottom physical profile on the devices’ breakdown performance are analyzed through technology computer-aided design simulations. It is indicated that the “abrupt” bottom profile could certainly do with an optimization. This paper introduces an effective process improvement method by etching bias power adjustment and time reduction. The upgradation of the field plate physical profile has been proved by transmission electron microscope cross-section analysis. The angle for the bottom surface of mini-LOCOS field plate θ2 is improved from 11.9° to 12.6°, and the thickness ratio of Hup/Hbottom (field plate oxide thickness for the upper and bottom, respectively) is increased from 71.8% to 76.6%. Finally, the optimized laterally diffused metal oxide semiconductor devices have been fabricated, and both figure of merit curves and safe operation area curves are measured. The specific on-resistance Ron,sp could achieve as low as 11.3 mΩ mm2, while breakdown voltage BVds,max arrives at 37.4 V, which is nearly 19.3% improved.","PeriodicalId":50386,"journal":{"name":"Iet Circuits Devices & Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135872636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Binary and Ternary Logic Inverters Based on Silicon Feedback FETs Using TCAD Simulator 利用TCAD模拟器设计基于硅反馈场效应管的二、三元逻辑逆变器

4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-10-23 DOI: 10.1049/2023/8833764

Ashkan Horri

{"title":"Design of Binary and Ternary Logic Inverters Based on Silicon Feedback FETs Using TCAD Simulator","authors":"Ashkan Horri","doi":"10.1049/2023/8833764","DOIUrl":"https://doi.org/10.1049/2023/8833764","url":null,"abstract":"A feedback field effect transistor (FBFET) with p-n-p-n structure benefits from a positive feedback mechanism. In this structure, the accumulated charges in its potential well and limitation of carrier flow by its internal potential barrier lead to superior electrical properties such as lower subthreshold swing (SS) and higher <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M1\"> <msub> <mi>I</mi> <mtext>ON</mtext> </msub> <mo>/</mo> <msub> <mi>I</mi> <mtext>OFF</mtext> </msub> </math> ratio in comparison with FinFET. Thus, FBFET is a promising alternative for digital applications such as logic inverters. In this paper, binary and ternary logic inverters are designed by using FBFETs with 40 nm channel length. The doping profile in the device plays an essential role and specifies the binary or ternary operation of the inverter. The inverter is analyzed by using a TCAD mixed-mode simulator. The results indicate the high value of 1010 for <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M2\"> <msub> <mi>I</mi> <mtext>ON</mtext> </msub> <mo>/</mo> <msub> <mi>I</mi> <mtext>OFF</mtext> </msub> </math> ratio with an extremely low SS (1 mV/decade). The voltage transfer characteristics of the inverter and its dependence on doping levels have been investigated. Also, the electrical properties of this inverter are compared with previous inverter counterparts.","PeriodicalId":50386,"journal":{"name":"Iet Circuits Devices & Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135414851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Low-Cost Full W-Band 8th Harmonic Mixers for Frequency Extension of Spectrum Analyzer 频谱分析仪扩频用低成本全w波段8次谐波混频器的设计

4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-10-23 DOI: 10.1049/2023/8196039

Jian Guo, Kaiyi Zang, Zihan Zhang, Liang Zhao, Jie Xu, Zhengbin Xu

{"title":"Design of Low-Cost Full W-Band 8th Harmonic Mixers for Frequency Extension of Spectrum Analyzer","authors":"Jian Guo, Kaiyi Zang, Zihan Zhang, Liang Zhao, Jie Xu, Zhengbin Xu","doi":"10.1049/2023/8196039","DOIUrl":"https://doi.org/10.1049/2023/8196039","url":null,"abstract":"High-order harmonic mixer is popular for frequency extension of spectrum analyzer (SA) from microwave to millimeter-wave or even terahertz band. The manufactures of SA usually offer expensive harmonic mixers where frequency extension is needed. In this work, low-cost designs of 2-port and 3-port W-band 8th harmonic mixers covering 75–110 GHz are proposed, and design method of two port mixer without frequency diplexer to separate local oscillator (LO) and intermediate frequency (IF) signals are first presented. These two kinds of mixers are compatible with almost all the current SAs with frequency extension options, which provides LO for the external harmonic mixer. The mixers are designed with planar microstrip lines and antiparallel Schottky diodes. The circuit of 2-port mixer includes the input broadband bandpass filter, diodes, output lowpass filter, and matching circuits. As for 3-port mixer, only an extra diplexer is needed to separate the IF signal and LO signal. The diplexer is composed of a planar semi-lumped lowpass and a highpass filter. The planar circuits are easily fabricated with low-cost print circuit board process on polytetrafluoroethylene substrate. The measured conversion loss of 2-port 8th harmonic mixer is from 20 to 26 dB, and 23 to 28 dB for 3-port mixer at full W-band. The good measured results indicate the proposed mixers are simple and effective.","PeriodicalId":50386,"journal":{"name":"Iet Circuits Devices & Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135414868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Linear broadband interference suppression circuit based on GaN monolithic microwave integrated circuits 基于GaN单片微波集成电路的线性宽带干扰抑制电路

IF 1.3 4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-07-26 DOI: 10.1049/cds2.12159

Megan C. Robinson, Zoya Popović, Gregor Lasser

{"title":"Linear broadband interference suppression circuit based on GaN monolithic microwave integrated circuits","authors":"Megan C. Robinson, Zoya Popović, Gregor Lasser","doi":"10.1049/cds2.12159","DOIUrl":"https://doi.org/10.1049/cds2.12159","url":null,"abstract":"This paper presents simulation and measurement results of a 2–4 GHz octave bandwidth interference suppression circuit. The circuit accomplishes the function of a tunable frequency notch through an interferometer architecture. The relative delay in the interferometer paths is varied with GaN monolithic microwave integrated circuit tunable delay lines. The delay is adjusted by varying the drain voltage of cold-FET connected high electron mobility transistors acting as varactors. Two types of periodically-loaded delay lines are compared: a uniform and a tapered design. A simple theoretical study, relating the delays and amplitudes in the interferometer circuit branches, is developed to inform the design. Two interference suppression hybrid circuits are implemented, and measurements demonstrate a 25–40 dB notch across the 2.24–4 GHz range for the uniform delay line, and 2.32–4.13 GHz for the tapered design. The return loss for both designs remains below 10 dB. Measurements with two tones spaced 0.5 and 1 GHz for varying tone power are performed to quantify suppression. The circuit can handle an input power of 37 dBm and maintains performance with two simultaneous 25 dBm tones spaced 0.5 GHz apart. Linearity is characterised with 10 MHz two-tone measurements, and the circuit demonstrates a 3rd-order intercept input power larger than 30 dBm for control biases above −12 V.","PeriodicalId":50386,"journal":{"name":"Iet Circuits Devices & Systems","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cds2.12159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50144516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical model analysis and reliability design approach of Quartz Flexible Accelerometer under fractured state 石英挠性加速度计断裂状态下的力学模型分析及可靠性设计方法

IF 1.3 4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-07-06 DOI: 10.1049/cds2.12161

Tingyu Xiao, Chunxi Zhang, Lailiang Song, Longjun Ran, Wanying Huang

{"title":"Mechanical model analysis and reliability design approach of Quartz Flexible Accelerometer under fractured state","authors":"Tingyu Xiao, Chunxi Zhang, Lailiang Song, Longjun Ran, Wanying Huang","doi":"10.1049/cds2.12161","DOIUrl":"https://doi.org/10.1049/cds2.12161","url":null,"abstract":"Currently, the Quartz Flexible Accelerometer (QFA) mounted for the applications working in high acceleration environment are suffering from the fracture of the flexible beams under external acceleration shock. This paper presents the mechanical model and reliability design approach of QFA to maintain the measuring ability under a fractured state. The structural parameters changed significantly in the mechanical model under a fractured state compared to those in the original model. A modified structure to maintain the measuring ability of QFA under a fractured state is designed with the reference of the sensitive module in Electrostatic Suspended Accelerometer (ESA). The corresponding close-loop system is corrected and discretised to ensure the stability requirements of the mechanical model. A static experiment is conducted to prove the effectiveness of the proposed model by a prototype QFA with completely fractured flexible beams. The result shows helpful on the preliminary research for QFA with the similar sensitive structure to ESA.","PeriodicalId":50386,"journal":{"name":"Iet Circuits Devices & Systems","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cds2.12161","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50122710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvements in reliability and radio frequency performance of junctionless tunnelling field effect transistor using p+ pocket and metal strip 利用p+袋和金属带提高无连接隧道场效应晶体管的可靠性和射频性能

IF 1.3 4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-07-06 DOI: 10.1049/cds2.12162

Alireza Zirak

{"title":"Improvements in reliability and radio frequency performance of junctionless tunnelling field effect transistor using p+ pocket and metal strip","authors":"Alireza Zirak","doi":"10.1049/cds2.12162","DOIUrl":"https://doi.org/10.1049/cds2.12162","url":null,"abstract":"In this article, a new p+ pocket stacked gate oxide junctionless tunnelling field effect transistor (junction less tunnelling field effect transistor (JLTFET)) which has metal strip in gate oxide layer is proposed for analogue/RF circuit applications. Due to the insertion of a p+ pocket in source/channel junction and the use of metal strip in oxide layer, the following properties of the proposed JLTFET are resulted. First, the tunnelling barrier width is reduced in the source/channel junction thereby, electrons easily tunnel from the source to the channel. Second, the hole concentration (empty state) in the channel is increased, leading to higher electron contribution in the tunnelling process. These improvements are useful in achieving high drain current and steep subthreshold swing. As a result, the maximum ON current of 4.4 × 10−5 A/μm and average subthreshold swing of 40 mV/decade are obtained from simulation results. Moreover, as compared to conventional JLTFET, the proposed JLTFET provides improvements in reliability and analogue/radio frequency (RF) performance.","PeriodicalId":50386,"journal":{"name":"Iet Circuits Devices & Systems","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cds2.12162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50122711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A chipless light switch for smart-homes 用于智能家居的无芯片电灯开关

IF 1.3 4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-07-06 DOI: 10.1049/cds2.12163

Abdullah S. Almansouri

引用次数: 1

A high-capacity and nonvolatile spintronic associative memory hardware accelerator 一种高容量非易失性自旋电子联想存储器硬件加速器

IF 1.3 4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-06-21 DOI: 10.1049/cds2.12160

Mahan Rezaei, Abdolah Amirany, Mohammad Hossein Moaiyeri, Kian Jafari

{"title":"A high-capacity and nonvolatile spintronic associative memory hardware accelerator","authors":"Mahan Rezaei, Abdolah Amirany, Mohammad Hossein Moaiyeri, Kian Jafari","doi":"10.1049/cds2.12160","DOIUrl":"https://doi.org/10.1049/cds2.12160","url":null,"abstract":"Significant progress has been made in manufacturing emerging technologies in recent years. This progress implemented in-memory-computing and neural networks, one of today's hottest research topics. Over time, the need to process complex tasks has increased. This need causes the emergence of intelligent processors. A nonvolatile associative memory based on spintronic synapses utilising magnetic tunnel junction (MTJ) and carbon nanotube field-effect transistors (CNTFET)-based neurons is proposed. The proposed design uses the MTJ device because of its fascinating features, such as reliable reconfiguration and nonvolatility. At the same time, CNTFET has overcome conventional complementary metal-oxide-semiconductor shortcomings like the short channel effect, drain-induced barrier lowering, and poor hole mobility. The proposed design is simulated in the presence of process variations. The proposed design aims to increase the number of weights generated in the synapse for higher memory capacity and accuracy. The effect of different tunnel magnetoresistance (TMR) values (100%, 200%, and 300%) on the performance and accuracy of the proposed design has also been investigated. This investigation shows that the proposed design performs well even with a low TMR value, which is very important and remarkable from the fabrication point of view.","PeriodicalId":50386,"journal":{"name":"Iet Circuits Devices & Systems","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cds2.12160","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50153076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A compact frequency reconfigurable beam switching antenna based on a single-layer FSS 一种基于单层FSS的紧凑型频率可重构波束切换天线

IF 1.3 4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-05-09 DOI: 10.1049/cds2.12157

Guang Li, Yangyang Ye, Fushun Zhang

{"title":"A compact frequency reconfigurable beam switching antenna based on a single-layer FSS","authors":"Guang Li, Yangyang Ye, Fushun Zhang","doi":"10.1049/cds2.12157","DOIUrl":"https://doi.org/10.1049/cds2.12157","url":null,"abstract":"A compact frequency reconfigurable beam switching antenna based on a single-layer frequency selective face (FSS) is proposed in this paper. The proposed antenna consists of a dual-band dipole antenna and a single-layer FSS with hexagonally arrangement. The omnidirectional radiation pattern of the dipole antenna designed as a radiation source and surrounded by the FSS can be converted into directional radiation pattern sweeping along the entire azimuthal plane at two single frequency of 2.4 or 5 GHz. The frequency selection is achieved by controlling the diode state of the FSS unit, and the beam switching is realised by a specific combination of electromagnetic wave reflection or transmission from the hexagonal FSS. The novelty lies in applying the hexagonal arrangement to a dual single-frequency single-layer FSS unit. This will not destroy the reflection or transmission characteristics of the FSS unit, but also contribute to reduce the antenna size and achieve a low cost. To validate the design, a prototype is fabricated and measured. The single-layer FSS antenna with a volume of 57 mm × 57 mm × 58.5 mm can be scanned in 12 steps along the azimuth plane at 2.4 and 5 GHz, respectively.","PeriodicalId":50386,"journal":{"name":"Iet Circuits Devices & Systems","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cds2.12157","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50144497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Construction of visual evaluation system for building block night scene lighting based on multi-target recognition and data processing 基于多目标识别和数据处理的建筑砌块夜景照明视觉评价系统的构建

IF 1.3 4区工程技术

Iet Circuits Devices & Systems Pub Date : 2023-02-22 DOI: 10.1049/cds2.12154

Xiaojian Wang, Xiaoye Sun, Zixuan Wang

{"title":"Construction of visual evaluation system for building block night scene lighting based on multi-target recognition and data processing","authors":"Xiaojian Wang, Xiaoye Sun, Zixuan Wang","doi":"10.1049/cds2.12154","DOIUrl":"https://doi.org/10.1049/cds2.12154","url":null,"abstract":"The rapid development of night tourism economy has made people's demand for night scene lighting in architectural blocks increasing, and the night scene lighting situation of urban architectural blocks has gradually received people's attention and attention. Achieving good night lighting visual effects of building blocks can not only meet the needs of residents for entertainment and consumption at night, but also beautify the image of blocks and promote the economic development of building blocks. However, due to the unreasonable planning and management of the night scene lighting design of architectural blocks in some areas, improper application of night scene lighting, and overly commercial night scene lighting effects, it affects people's normal night activity needs and has a negative impact on the long-term block economy of the region. Faced with this situation, the night lighting of architectural blocks and its problems is studied and photos are identified with high lighting visual effect evaluation using multi-target identification and data processing to construct a night lighting visual evaluation system for architectural blocks, and also an experimental study of the visual evaluation system is conducted. The results show that the overall visual suitability evaluation support rate of the respondents for the night scene lighting of architectural blocks is 95.64%, and the visual evaluation system proposed in this paper is reasonable and effective, which is conducive to promoting the improvement of the visual effect of night scene lighting in architectural blocks.","PeriodicalId":50386,"journal":{"name":"Iet Circuits Devices & Systems","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cds2.12154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50149389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1