2012 European Frequency and Time Forum最新文献_第9页

Time-to-Digit Converter Based on radiation-tolerant FPGA 基于耐辐射FPGA的时间-数字转换器

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502384

M. Peca, M. Vacek, V. Michálek

{"title":"Time-to-Digit Converter Based on radiation-tolerant FPGA","authors":"M. Peca, M. Vacek, V. Michálek","doi":"10.1109/EFTF.2012.6502384","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502384","url":null,"abstract":"Architecture of a time-to-digit converter (TDC) is presented. TDC is an electronic device which measures time of arrival of discrete electronic pulses, with respect to reference time base. Our work on TDC is motivated by its applications in field of long-range laser distance measurement and time synchronization. Unlike earlier time interpolation methods, we have chosen all-digital approach based on pulse propagation through tapped delay line. We do not expect it could outperform recent invention of time interpolation using narrow-band filter excitation [1], [2]. However, our approach relies on a standard digital circuitry only. With space applications in mind, we are implementing the TDC into a space qualified, radiation-tolerant field-programmable gate array (FPGA). On top of related works [4] and [5] on all-digital TDCs, delay line, we try to gather more complete information about the sampled pulse. It is done by sampling of whole bit vector, corresponding to all of the delay line taps. A calibration method based on random pulse source is discussed, including preliminary results. Impact of physical FPGA cell placement on resulting time measurement granularity is observed. Actually measured jitter distribution is compared to normal distribution function, giving an insight of absolute accuracy limit of our approach within the given FPGA platform.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"42 1","pages":"286-289"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88479429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Wall-coated cells for Rb atomic clocks: Study of the ripening process by double-resonance spectroscopy 铷原子钟壁包细胞:用双共振光谱研究成熟过程

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502340

M. Pellaton, C. Affolderbach, G. Mileti, R. Straessle, D. Briand, N. D. de Rooij

引用次数: 1

Compact Hz-level linewidth laser system 紧凑的赫兹级线宽激光系统

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502361

E. Portuondo-Campa, S. Kundermann, S. Lecomte

引用次数: 0

Direct comparison of two Cryocooled Sapphire Oscillators presenting relative frequency instability at 10−15 直接比较在10 - 15时相对频率不稳定的两个冷冻蓝宝石振荡器

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502380

S. Grop, B. Dubois, J. Masson, P. Bourgeois, Y. Kersalé, E. Rubiola, G. Haye, V. Giordano

引用次数: 1

Towards the detection of high-contrast Cs CPT resonances using a single modulated diode laser 利用单调制二极管激光器探测高对比度CPT共振

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502388

X. Liu, E. Kroemer, J. Merolla, R. Boudot

引用次数: 1

Asymmetric spectra of phase modulated transitions of square waves 方波相位调制跃迁的不对称谱

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502434

M. Underhill

引用次数: 2

State-of-the-art time link calibration with a mobile TWSTFT station 最先进的时间链接校准与移动TWSTFT站

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502426

T. Feldmann, Arvind Balu, Cedric Molard, W. Schafer, Dirk Piester

引用次数: 2

New electrostatically-excited single crystal silicon resonator vibrating in a Thickness-Extensional mode 一种新型静电激励单晶硅谐振器，以厚度-伸展模式振动

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502371

M. Ivan, B. Dulmet, G. Martin, S. Ballandras

{"title":"New electrostatically-excited single crystal silicon resonator vibrating in a Thickness-Extensional mode","authors":"M. Ivan, B. Dulmet, G. Martin, S. Ballandras","doi":"10.1109/EFTF.2012.6502371","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502371","url":null,"abstract":"This paper presents a new patent-pending structure of BAW resonator built on standard silicon wafer and driven by electrostatic force. Thickness-Extensional (TE) modes are exploited, yielding a fundamental frequency near 10 MHz with a 400µm-thick Si wafer. The device is based on a one-port design featuring a 1µm gap submitted to a superimposition of a DC voltage bias and a lesser-amplitude AC excitation. In contrast with conventional bar and plate MEMS resonators relying on structural resonances, our resonators are designed to use an energy-trapping of the TE waves to optimize the Q factor. The structure essentially consists of a single (100) Silicon plate, p-doped and bonded onto a Corning glass substrate by standard anodic bonding. The thin gap required for the electrostatic excitation is machined in the glass layer by Reactive Ion Etching. Extensive electrical and mechanical characterisations were performed. They match rather well the behavior predicted by the theoretical analysis. A compensation of the large static capacitance is needed to give a better access to the motional parameters. Q factors near 9000 have been observed on the fundamental TE-mode, with a sufficient coupling for frequency source applications. The stabilization of a RF oscillator using the resonators is still under development.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"33 1","pages":"221-226"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86606823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Improvement of comparisons between T2L2 & RF links 改进了T2L2和RF链路之间的比较

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502398

P. Guillemot, P. Laurent, J. Achkar, D. Rovera, E. Samain, P. Exertier, S. Leon

引用次数: 1

Fiber optic RF frequency transfer on the distance of 480 km with the active stabilization of the propagation delay 光纤射频频率传输在480千米的距离上具有主动稳定的传播延时

2012 European Frequency and Time Forum Pub Date : 2012-04-23 DOI: 10.1109/EFTF.2012.6502417

L. Sliwczynski, P. Krehlik, L. Buczek, M. Lipinski, J. Kołodziej

引用次数: 2