共查询到20条相似文献,搜索用时 15 毫秒
1.
Chiang P. Dally W.J. Lee M.-J.E. Senthinathan R. Yangjin Oh Horowitz M.A. 《Solid-State Circuits, IEEE Journal of》2005,40(4):1004-1011
A 20-Gb/s transmitter is implemented in 0.13-/spl mu/m CMOS technology. An on-die 10-GHz LC oscillator phase-locked loop (PLL) creates two sinusoidal 10-GHz complementary clock phases as well as eight 2.5-GHz interleaved feedback divider clock phases. After a 2/sup 20/-1 pseudorandom bit sequence generator (PRBS) creates eight 2.5-Gb/s data streams, the eight 2.5-GHz interleaved clocks 4:1 multiplex the eight 2.5-Gb/s data streams to two 10-Gb/s data streams. 10-GHz analog sample-and-hold circuits retime the two 10-Gb/s data streams to be in phase with the 10-GHz complementary clocks. Two-tap equalization of the 10-Gb/s data streams compensate for bandwidth rolloff of the 10-Gb/s data outputs at the 10-GHz analog latches. A final 20-Gb/s 2:1 output multiplexer, clocked by the complementary 10-GHz clock phases, creates 20-Gb/s data from the two retimed 10-Gb/s data streams. The LC-VCO is integrated with the output multiplexer and analog latches, resonating the load and eliminating the need for clock buffers, reducing power supply induced jitter and static phase mismatch. Power, active die area, and jitter (rms/pk-pk) are 165 mW, 650 /spl mu/m/spl times/350 /spl mu/m, and 2.37 ps/15 ps, respectively. 相似文献
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This paper compares two approaches for evaluating the amplitude and timing jitters of an Er-fiber laser mode-locked at 10 GHz. Using a low-noise oscillator as the clock drive for the mode-locking, relative amplitude jitter was measured as low as 0.0384% and timing jitter as low as 0.0153% (/spl Delta/f=100 Hz-40 MHz). Applying the mode-locked pulse train in a photonic sampling experiment at 10 Gsample/s, a spurious free dynamic range (SFDR) of /spl sim/48.5 dB (over the Nyquist bandwidth of 5 GHz) for multiple analog inputs at L band (1-2.6 GHz). These results correspond to an analog-to-digital conversion resolution of /spl sim/8 SFDR bits at 10 Gsample/s. Finally, the use of "instantaneous companding" is demonstrated to correct for third-order distortions generated by a Mach-Zehnder modulator used in the photonic sampling link. 相似文献
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A directly modulated 1.3 /spl mu/m InGaAsP DFB laser with a simple buried structure using Ru-doped semi-insulating InP is presented. The high relaxation oscillation frequency of 10 GHz was obtained at 95/spl deg/C. Clear eye openings under 10 Gbit/s direct modulation were achieved from 0 to 100/spl deg/C. 相似文献
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Chulwoo Kim In-Chul Hwang Sung-Mo Kang 《Solid-State Circuits, IEEE Journal of》2002,37(11):1414-1420
In this paper, a delay-locked loop (DLL)-based clock generator is presented. Although a DLL-based clock generator requires a clean reference signal, it has several inherent advantages over conventional phase-locked-loop-based clock generators, i.e., no jitter accumulation, fast locking, stable loop operation, and easy integration of the loop filter. We propose a phase detector with a reset circuitry and a new frequency multiplier to overcome the limited locking range and frequency multiplication problems of the conventional DLL-based system. Fabricated in a 0.35-/spl mu/m CMOS process, our DLL-based clock generator occupies 0.07 mm/sup 2/ of area and consumes 42.9 mW of power. It operates in the frequency range of 120 MHz-1.1 GHz and has a measured cycle-to-cycle jitter of /spl plusmn/7.28 ps at 1 GHz. The die area, peak-to-peak, and r.m.s. jitter are the smallest compared to those of reported high-frequency clock multipliers. 相似文献
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Zhao X. Moewe M. Chrostowski L. Chang C.-H. Shau R. Ortsiefer M. Amann M.-C. Chang-Hasnain C.J. 《Electronics letters》2004,40(8):476-478
A record resonance frequency of 28 GHz and an intrinsic laser 3 dB bandwidth of 34 GHz is reported for a directly modulated injection-locked 1.55 /spl mu/m VCSEL. The small-signal modulation response is experimentally investigated using polarisation-maintaining components. 相似文献
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Krishnamurthy K. Chow J. Mensa D. Pullela R. 《Microwave and Wireless Components Letters, IEEE》2004,14(1):28-30
Packaged master-slave D-flip-flops designed in InP DHBT technology with 150 GHz f/sub t/ and 180 GHz f/sub max/ are presented. Measurement results using a 43.2 Gb/s nonreturn to zero (NRZ), pseudo random binary sequence (PRBS) data (generated from 4 channels of 10.8 Gb/s, 2/sup 31/-1, PRBS data) and a 43.2 GHz clock, show a clock phase margin of 190/spl deg/. 2:1 Static frequency dividers designed using the D-flip-flops have been tested up to 50 GHz and show normal operation. These circuits are key building blocks in numerous front-end circuits used for 40 Gb/s optical communication systems. 相似文献
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A 10-Gb/s phase-locked clock and data recovery circuit incorporates a multiphase LC oscillator and a half-rate phase/frequency detector with automatic data retiming. Fabricated in 0.18-/spl mu/m CMOS technology in an area of 1.75/spl times/1.55 mm/sup 2/, the circuit exhibits a capture range of 1.43 GHz, an rms jitter of 0.8 ps, a peak-to-peak jitter of 9.9 ps, and a bit error rate of 10/sup -9/ with a pseudorandom bit sequence of 2/sup 23/-1. The power dissipation excluding the output buffers is 91 mW from a 1.8-V supply. 相似文献
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H. Tsuchida 《Photonics Technology Letters, IEEE》2006,18(16):1687-1689
Line rate optical clock recovery at 160-Gb/s has been demonstrated based on injection-locking and optical time-division multiplexing of a 40-GHz regeneratively mode-locked laser diode (RML-LD). Injection-locking is achieved by directly coupling the 160-Gb/s data streams to a photodetector in the RML-LD feedback loop. The pulsewidth and root-mean-square timing jitter of the recovered clocks are 2.31 ps and 225 fs (10 Hz-40 MHz), respectively. 相似文献
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E. Tangdiongga Y. Liu H. de Waardt G.D. Khoe H.J.S. Dorren 《Photonics Technology Letters, IEEE》2006,18(8):908-910
We demonstrate excellent all-optical demultiplexing of 40-Gb/s base-rate channels out of 160- and 320-Gb/s single polarization optical time-division-multiplexed data streams. The demultiplexer utilizes a semiconductor optical amplifier and an optical filter placed at the amplifier output. The center wavelength of the filter is blue-shifted from the wavelength of the clock signal, so that ultrafast chirp dynamics can be employed for optical switching. Error-free demultiplexing was achieved at very low optical switch powers: 3.5 mW (160-Gb/s data), 6.3 mW (320-Gb/s data), and 0.09 mW (40-GHz clock). The proposed demultiplexer has a simple structure and allows monolithic integration. 相似文献
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A 43-Gb/s full-rate clock transmitter chip for SONET OC-768 transmission systems is reported. The IC is implemented in a 0.18-/spl mu/m SiGe BiCMOS technology featuring 120 GHz f/sub T/ and 100 GHz f/sub max/ HBTs. It consists of a 4:1 multiplexer, a clock multiplier unit, and a frequency lock detector. The IC features clock jitter generation of 260 fs rms and dissipates 2.3 W from a -3.6-V supply voltage. Measurement results are compared to a previously reported half-rate clock transmitter designed using the same technology. 相似文献
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《Electronics letters》2004,40(15):937-938
A buried heterostructure based on Fe-doped InP semi-insulating layers is optimised for both high output power and large modulation bandwidth operations up to 70/spl deg/C in a 10 Gbit/s directly modulated 1.3 /spl mu/m InGaAsP/InP distributed feedback laser. The slope efficiency of 0.19 W/A and -3 dB bandwidth of 10 GHz at 1.5 times threshold current is demonstrated experimentally. 相似文献
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《Lightwave Technology, Journal of》2009,27(16):3531-3539
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Chua-Chin Wang Yih-Long Tseng Hsien-Chih She Hu R. 《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2004,12(12):1377-1381
A CMOS local oscillator using a programmable delayed-lock loop based frequency multiplier is present in this paper. The maximum measured output frequency is 1.2 GHz. The frequency of the output clock is 8/spl times/ to 10/spl times/ of an input reference clock between 100 to 150 MHz at simulation. No LC-tank is used in the proposed design such that the power dissipation as well as the active area is drastically reduced. The design is carried out by TSMC 1P5M 0.25 /spl mu/m CMOS process at 2.5 V power supply. The average lock time is optimally shortened by initializing the start-up voltage of the voltage-controlled delay tap line at the midway of the working range. Meanwhile, the power dissipation is 52.5 mW at 1.2 GHz output. 相似文献
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15-GHz modulation performance of integrated DFB laser diode EA modulator with identical multiple-quantum-well double-stack active layer 总被引:2,自引:0,他引:2
Monolithically integrated InGaAsP 1.55-/spl mu/m ridge waveguide distributed feedback laser diodes with an electroabsorption modulator using an identical active multiquantum-well (MQW) layer structure with two different QW types exhibit low-threshold currents <18 mA. The 3-dBe cutoff frequency of 200-/spl mu/m-long modulators exceeds 15 GHz. 10-Gb/s transmission experiments with a voltage swing of 1.0 V/sub pp/ demonstrate the potential of this novel integration scheme. 相似文献
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Meghelli M. Rylyakov A.V. Zier S.J. Sorna M. Friedman D. 《Solid-State Circuits, IEEE Journal of》2003,38(12):2147-2154
A 43-Gb/s receiver (Rx) and transmitter (Tx) chip set for SONET OC-768 transmission systems is reported. Both ICs are implemented in a 0.18-/spl mu/m SiGe BiCMOS technology featuring 120-GHz f/sub T/ and 100 GHz f/sub max/. The Rx includes a limiting amplifier, a half-rate clock and data recovery unit, a 1:4 demultiplexer, a frequency acquisition aid, and a frequency lock detector. Input sensitivity for a bit-error rate less than 10/sup -9/ is 40 mV and jitter generation better than 230 fs rms. The IC dissipates 2.4 W from a -3.6-V supply voltage. The Tx integrates a half-rate clock multiplier unit with a 4:1 multiplexer. Measured clock jitter generation is better than 170 fs rms. The IC consumes 2.3 W from a -3.6-V supply voltage. 相似文献
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《Solid-State Circuits, IEEE Journal of》2005,40(12):2388-2397
A 2/spl times/40 W class D amplifier chip is realized in 0.6-/spl mu/m BCDMOS technology, integrating two delta-sigma (/spl Delta//spl Sigma/) modulators and two full H-bridge switching output stages. Analog feedback from H-bridge outputs helps achieve 67-dB power supply rejection ratio, 0.001% total harmonic distortion, and 104-dB dynamic range. The modulator clock rate is 6 MHz, but dynamically adjusted quantizer hysteresis reduces output data rate to 450 kHz, helping achieve 88% power efficiency. At AM radio frequencies, the modulator output spectrum contains a single peak, but is otherwise tone-free, unlike conventional pulse-width modulation (PWM) modulators which contain energetic tones at harmonics of the PWM clock frequency. 相似文献
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160-gb/s OTDM signal source with 3R function utilizing ultrafast mode-locked laser diodes and modified NOLM 总被引:2,自引:0,他引:2
S. Arahira Y. Ogawa 《Photonics Technology Letters, IEEE》2005,17(5):992-994
High-quality 160-Gb/s optical time-division-multiplexing (OTDM) signal source with 3R functions was demonstrated using ultrafast mode-locked laser diodes (MLLDs) and a nonlinear optical fiber loop mirror (NOLM) modified with inline and external polarizers and an inline optical phase-bias compensator. Pulse quality for each OTDM channel was successfully improved and equalized owing to the clock extraction at the true data bit rate using a 160-GHz MLLD and also to the improvement of the switching performance of the NOLM. 相似文献