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A low power fast-settling frequency-presetting PLL frequency synthesizer

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Journal of Semiconductors 2010年第8期31卷 108-113页

作者：耿志卿颜小舟楼文峰冯鹏吴南健 State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences

This work presents the design and implementation of a 2.4 GHz low power fast-settling frequency-presetting PLL frequency synthesizer in the 0.18μm CMOS process.A low power mixed-signal LC VCO,a low power dual mode prescaler and a digital processor with non-volatile memory are developed to greatly reduce the power consumption and the setting *** digital processor can automatically calibrate the presetting frequency and accurately preset the frequency of the VCO under process *** experimental results demonstrate that the power consumption of the synthesizer is about 4 mA @ 1.8 V and that the typical setting time of the synthesizer is less than 3μs.

关键词： fast-settling presetting low power PLL synthesizer

BIT COMMITMENT USING PSEUDO-RANDOM synthesizer

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Journal of Electronics(China) 1999年第4期16卷 372-375页

作者： Zheng Dong Liu Shengli Wang Yumin (ISN Key Lab., Xidian University, Xi’an 710071) ISN Key Lab. Xidian University Xi’an

This paper presents two practical message commitment schemes: one is suitable for committing many bits, and another is useful for committing any bit-long message. They are provably secure based on pseudo-random synthesizers. In these schemes, the sender may be unbounded to polynomial time and the receiver is bounded. The advantage of these schemes is that the secure parameter may be small.

关键词： Bit commitment Pseudo-random synthesizer

Fast Switching Fractional-N Frequency synthesizer Architecture Using TDTL

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International Journal of Communications, Network and System Sciences 2009年第9期2卷 879-887页

作者： Mahmoud A. AL-QUTAYRI Saleh R. AL-ARAJI Abdulrahman Al-HUMAIDAN 不详

This paper presents an efficient indirect fractional frequency synthesizer architecture based on the time delay digital tanlock loop. The indirect type frequency synthesis systems incorporate a low complexity high performance adaptation mechanism that enables them to remain in a locked state following the division process. The performance of the proposed fractional-N synthesizer under various input conditions is demonstrated. This includes sudden changes in the system input frequency as well as the injection of noise. The results of the extensive set of tests indicate that the fractional-N synthesizer, proposed in this work, performs well and is capable of achieving frequency divisions with fine resolution. The indirect frequency synthesizer also has a wide locking range and fast switching response. This is reflected by the system ability to regain its lock in response to relatively large variations in the input frequency within a few samples. The overall system performance shows high resilience to noise as reflected by the mean square error results.

关键词： Fractional synthesizer Time Delay Tanlock Loop Register Adaptation

Towards integrated photonic interposers for processing octave-spanning microresonator frequency combs

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Light(Science & Applications) 2021年第6期10卷 1099-1111页

作者： Ashutosh Rao Gregory Moille Xiyuan Lu Daron A.Westly Davide Sacchetto Michael Geiselmann Michael Zervas Scott B.Papp John Bowers Kartik Srinivasan Physical Measurement Laboratory Microsystems and Nanotechno logy DivisionNational Institute of Standards and TechnologyGaithersburgMD 20899USA Maryland NanoCenter University of MarylandCollege Park 20742 MDUSA Joint Quantum Institute NIST/University of MarylandCollege ParkMD 20742USA Ligentec EPFL Innovation ParkBatiment CLausanneSwitzerland Physical Measurement Laboratory Time and Frequency DivisionNational Institute of Standards and TechnologyBoulderCO 80305USA Department of Physics University of ColoradoBoulderCO 80309USA Department of Electrical and Computer Engineering University of CaliforniaSanta BarbaraCA 93106USA

Microcombs-optical frequency combs generated in microresonators-have advanced tremendously in the past decade,and are advantageous for applications in frequency metrology,navigation,spectroscopy,telecommunications,and microwave ***,microcombs promise fully integrated miniaturized optical systems with unprecedented reductions in cost,size,weight,and ***,the use of bulk free-space and fiber-optic comp on ents to process microcombs has restricted form factors to the *** microcomb-based optical frequency synthesis around 1550 nm as our target application,here,we address this challenge by proposing an integrated photonics interposer architecture to replace discrete components by collecting,routing,and interfacing octave-wide microcomb-based optical signals between photonic chiplets and heterogeneously integrated ***,we con firm the requisite performa nee of the individual passive elements of the proposed interposer一octave-wide dichroics,multimode interferometers,and tunable ring filters,and implement the octave-spanning spectral filteri ng of a microcomb,central to the in terposer,using silicon n itride phot ***,we show that the thick silicon nitride needed for bright dissipative Kerr soliton generation can be integrated with the comparatively thin silicon nitride interposer layer through octave-bandwidth adiabatic evanescent coupling,indicating a path towards future system-level *** ally,we numerically confirm the feasibility of operating the proposed in terposer synthesizer as a fully assembled *** interposer architecture addresses the immediate need for on-chip microcomb processing to successfully miniaturize microcomb systems and can be readily adapted to other metrology-grade applications based on optical atomic clocks and high-precision navigation and spectroscopy.

关键词： resonator interferometer synthesizer

TDTL Based Frequency synthesizers with Auto Sensing Technique

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International Journal of Communications, Network and System Sciences 2009年第5期2卷 330-343页

作者： Mahmoud AL-QUTAYRI Saleh AL-ARAJI Abdulrahman AL-HUMAIDAN College of Engineering Khalifa University of Science Technology and Research Sharjah Campus Sharjah UAE

This paper presents a frequency synthesizer architecture based on the time delay digital tanlock loop (TDTL). The loop is of the first order type. The synthesizer architecture includes an adaptation mechanism to keep the complete system in lock. The mechanism uses a frequency sensing structure to control critical TDTL parameters responsible for locking. Both integer and fractional multiples of the loop reference frequency are synthesized by the new architecture. The ability of the TDTL based frequency synthesizer to respond to sudden variations in the system input frequency is studied. The results obtained indicate the proposed synthesizer has a robust performance and is capable of responding to those changes provided that they are within the bounds of its locking region.

关键词： Time-Delay Tanlock Loop Frequency synthesizer Phase Lock Loop Indirect Synthesis

A monolithic 3.1-4.8 GHz MB-OFDM UWB transceiver in 0.18-μm CMOS

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Journal of Semiconductors 2010年第6期31卷 109-117页

作者：郑仁亮江旭东姚望杨光尹江伟郑剑钦任俊彦李巍李宁 State Key Laboratory of ASIC and System Fudan University Micro-/Nano-Electronics Science and Technology Innovation Platform Fudan University

A monolithic RF transceiver for an MB-OFDM UWB system in 3.1-4.8 GHz is *** transceiver adopts direct-conversion architecture and integrates all building blocks including a gain controllable wideband LNA,a I/Q merged quadrature mixer,a fifth-order Gm-C bi-quad Chebyshev LPF/VGA,a fast-settling frequency synthesizer with a poly-phase filter,a linear broadband up-conversion quadrature modulator,an active D2S converter and a variablegain power *** ESD protected transceiver is fabricated in Jazz Semiconductor＇s 0.18-μm RF CMOS with an area of 6.1 mm^2 and draws a total current of 221 mAfrom 1.8-V *** receiver achieves a maximum voltage gain of 68 dB with a control range of 42 dB in 6 dB/step,noise figures of 5.5-8.8 dB for three sub-bands,and an inband /out-band IIP_3 better than-4 dBm/＋9 *** transmitter achieves an output power ranging from-10.7 to-3 dBm with gain control,an output P_（1dB） better than-7.7 dBm,a sideband rejection about 32.4 dBc,and LO suppression of 31.1 *** hopping time among sub-bands is less than 2.05 ns.

关键词： MB-OFDM UWB transceiver receiver transmitter synthesizer

Broadband 200-nm second-harmonic generation in silicon in the telecom band

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Light(Science & Applications) 2020年第1期9卷 1844-1850页

作者： Neetesh Singh Manan Raval Alfonso Ruocco Michael R.Watts Research Laboratory of Electronics Massachusetts Institute of Technology77 Massachusetts AvenueCambridgeMA 02139USA

Silicon is well known for its strong third-order optical nonlinearity,exhibiting efficient supercontinuum and four-wave mixing processes.A strong second-order effect that is naturally inhibited in silicon can also be observed,for example,by electrically breaking the inversion symmetry and quasi-phase matching the pump and the *** generate an efficient broadband second-harmonic signal,however,the most promising technique requires matching the group velocities of the pump and the *** this work,we utilize dispersion engineering of a silicon waveguide to achieve group velocity matching between the pump and the signal,along with an additional degree of freedom to broaden the second harmonic through the strong third-order *** demonstrate that the strong self-phase modulation and cross-phase modulation in silicon help broaden the second harmonic by 200 nm in the ***,we show a waveguide design that can be used to generate a second-harmonic signal in the entire nearinfrared *** work paves the way for various applications,such as efficient and broadband complementarymetal oxide semiconductor based on-chip frequency synthesizers,entangled photon pair generators,and optical parametric oscillators.

关键词： waveguide synthesizer harmonic

Phase-Locking of a Gunn Oscillator at 3mm Waveband Using High Temperature Superconducting Josephson Junction Harmonic Mixer

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Chinese Physics Letters 1995年第4期12卷 253-256页

作者： WANG Huabing XU Weiwei CHENG Qiheng JI Zhengming GAO Ruizhang WU Peiheng XU Zhicai Department of Information Physics Nanjing UniversityNanjing 210093 Center for Advanced Studies in Science and Technology of Microstructures Nanjing 210093 Purple Mountain Observatory Academia SinicaNanjing 210008

A Gunn oscillator at 3mm waveband has been phase-locked to a synthesizer local oscillator using a high T_(c)YBa_(2)Cu_(3)O_(7-δ) Josephson junction operated at 77K as the harmonic mixer,with harmonic numbers up to *** observed spectrum of the phase-locked output at the intermediate frequency(IF)shows clearly that the quality of the phase-locking is very *** drive the analogue phase locking loop successfully,it is essential to have IF output and signal-to-noise ratio both as high as possible.

关键词： synthesizer mixer oscillator

A monolithic RF transceiver for DC-OFDM UWB

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Journal of Semiconductors 2012年第2期33卷 87-95页

作者： Chen Yunfeng Li Wei Fu Haipeng Gap Ting Chen Danfeng Zhou Feng Cai Deyun Li Dan Niu Yangyang Zhou Hanchao Zhu Ning Li Ning Ren Junyan State Key Laboratory of ASIC&System Fudan UniversityShanghai 201203China Micro-/Nano-Electronics Science and Technology Innovation Platform Fudan UniversityShanghai 201203China

This paper presents a first monolithic RF transceiver for DC-OFDM UWB *** proposed direct-conversion transceiver integrates all the building blocks including two receiver（Rx） cores,two transmitter （Tx） cores and a dual-carrier frequency synthesizer（DC-FS） as well as a 3-wire serial peripheral interface（SPI） to set the operating status of the *** ESD-protected chip is fabricated by a TSMC 0.13-μm RF CMOS process with a die size of 4.5 x 3.6 *** measurement results show that the wideband Rx achieves an NF of 5-6.2 dB,a max gain of 76-84 dB with 64-dB variable gain,an in-/out-of-band IIP3 of-6/＋4 dBm and an input loss S11 of〈-10 in all *** Tx achieves an LOLRR/IMGRR of-34/-33 dBc,a typical OIP3 of＋6 dBm and a maximum output power of -5 *** DC-FS outputs two separate carriers simultaneously with an inter-band hopping time of〈1.2 *** full chip consumes a maximum current of 420 mA under a 1.2-V supply.

关键词： DC-OFDM UWB RF transceiver receiver transmitter synthesizer CMOS