scholarly journals Direct measurement of loop gain and bandwidth of phase-locked loop for mode-locked laser

2016 ◽  
Vol 24 (15) ◽  
pp. 17242 ◽  
Author(s):  
Dong Hou ◽  
Jie Tian ◽  
Fuyu Sun ◽  
Xianhe Huang
Keyword(s):  
Direct Measurement ◽  
Phase Locked Loop ◽  
Loop Gain ◽  
Mode Locked Laser

Next Generation Laser Voltage Probing

2008 ◽  
Author(s):  
Yin S Ng ◽  
William Lo ◽  
Kenneth Wilsher
Keyword(s):  
Phase Modulation ◽  
Phase Locked Loop ◽  
Next Generation ◽  
Solid Immersion Lens ◽  
User Friendliness ◽  
New Developments ◽  
Polarization Difference ◽  
Previous Generation ◽  
Mode Locked Laser ◽  
Optical Laser

Abstract We present an overview of Ruby, the latest generation of backside optical laser voltage probing (LVP) tools [1, 2]. Carrying over from the previous generation of IDS2700 systems, Ruby is capable of measuring waveforms up to 15GHz at low core voltages 0.500V and below. Several new optical capabilities are incorporated; these include a solid immersion lens (SIL) for improved imaging resolution [3] and a polarization difference probing (PDP) optical platform [4] for phase modulation detection. New developments involve Jitter Mitigation, a scheme that allows measurements of jittery signals from circuits that are internally driven by the IC’s onboard Phase Locked Loop (PLL). Additional timing features include a Hardware Phase-Locked Loop (HWPLL) scheme for improved locking of the LVP’s Mode-Locked Laser (MLL) to the tester clock as well as a clockless scheme to improve the LVP’s usefulness and user friendliness. This paper presents these new capabilities and compares these with those of the previous generation of LVP systems [5, 6].

scholarly journals Adaptive Gain Control Method of a Phase-Locked Loop for GNSS Carrier Signal Tracking

2018 ◽  
Vol 2018 ◽  
pp. 1-14
Author(s):  
Zhibin Luo ◽  
Jicheng Ding ◽  
Lin Zhao
Keyword(s):  
Control Method ◽  
Tracking Error ◽  
Gain Control ◽  
Phase Locked Loop ◽  
Satellite System ◽  
Error Characteristic ◽  
Loop Gain ◽  
Target Movement ◽  
Signal Tracking ◽  
Global Navigation Satellite

The global navigation satellite system (GNSS) has been widely used in both military and civil fields. This study focuses on enhancing the carrier tracking ability of the phase-locked loop (PLL) in GNSS receivers for high-dynamic application. The PLL is a very popular and practical approach for tracking the GNSS carrier signal which propagates in the form of electromagnetic wave. However, a PLL with constant coefficient would be suboptimal. Adaptive loop noise bandwidth techniques proposed by previous researches can improve PLL tracking behavior to some extent. This paper presents a novel PLL with an adaptive loop gain control filter (AGCF-PLL) that can provide an alternative. The mathematical model based on second- and third-order PLL was derived. The error characteristics of the AGCF-PLL were also derived and analyzed under different signal conditions, which mainly refers to the different combinations of carrier phase dynamic and signal strength. Based on error characteristic curves, the optimal loop gain control method has been achieved to minimize tracking error. Finally, the completely adaptive loop gain control algorithm was designed. Comparable test results and analysis using the new method, conventional PLL, FLL-assisted PLL, and FAB-LL demonstrate that the AGCF-PLL has stronger adaptability to high target movement dynamic.

Highly-Stable Integrated InGaAsP/InP Mode-Locked Laser and Optical Phase-Locked Loop

2013 ◽  
Vol 25 (18) ◽  
pp. 1851-1854 ◽  
Author(s):  
John Stone Parker ◽  
Mingzhi Lu ◽  
Hyunchul Park ◽  
Abirami Sivananthan ◽  
Eli Bloch ◽  
...  
Keyword(s):  
Phase Locked Loop ◽  
Optical Phase ◽  
Mode Locked Laser

scholarly journals Direct loop gain and bandwidth measurement of phase-locked loop

2017 ◽  
Vol 88 (8) ◽  
pp. 084704 ◽  
Author(s):  
P. Ye ◽  
R. Ren ◽  
Y. Kou ◽  
F. Sun ◽  
J. Hu ◽  
...  
Keyword(s):  
Phase Locked Loop ◽  
Loop Gain ◽  
Bandwidth Measurement

scholarly journals Real-time loop gain and bandwidth measurement of phase-locked loop

2018 ◽  
Vol 89 (12) ◽  
pp. 124703
Author(s):  
Jie Tian ◽  
Kai Li ◽  
Yongsheng Cheng ◽  
Nan Xie ◽  
Dong Hou
Keyword(s):  
Real Time ◽  
Phase Locked Loop ◽  
Loop Gain ◽  
Time Loop ◽  
Bandwidth Measurement
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