An effective phase detector for phase-locked loops with wide capture range and fast acquisition time

2010 ◽  
Author(s):  
Chi-Sheng Lin ◽  
Ting- Chien ◽  
Chin-Long Wey
Keyword(s):  
Phase Detector ◽  
Phase Locked Loops ◽  
Acquisition Time ◽  
Fast Acquisition ◽  
Capture Range ◽  
Effective Phase

IMPROVED PERFORMANCE PHASE DETECTOR FOR MULTIPLICATIVE SECOND-ORDER PLL SYSTEMS USING DEFORMED ALGEBRA

2014 ◽  
Vol 23 (01) ◽  
pp. 1450008
Author(s):  
MARCONI O. DE ALMEIDA ◽  
EDUARDO T. F. SANTOS ◽  
JOSÉ M. ARAÚJO
Keyword(s):  
Control Systems ◽  
Tracking System ◽  
Phase Detector ◽  
Phase Locked Loops ◽  
Frequency Tracking ◽  
Maximum Likelihood Approach ◽  
Multiplicative Type ◽  
Likelihood Approach ◽  
Improved Performance ◽  
And Control

Phase-locked loops (PLL) is a phase and/or frequency tracking system, widely used in communication and control systems. The sinusoidal multiplicative type PLL still remains a recurrent model, due the fact that its derivation is originated from the maximum likelihood approach. In this note, it is showed as a generalized product, called q-product, which can be used to implement the phase detector and improve some important parameters of the PLL system, as the block linearity and pull-in characteristics. Numerical examples are presented in order to illustrate the proposal.

Improved phase detector for electro-optical phase-locked loops

2008 ◽  
Vol 44 (12) ◽  
pp. 758 ◽  
Author(s):  
L. Naglič ◽  
L. Pavlovič ◽  
B. Batagelj ◽  
M. Vidmar
Keyword(s):  
Phase Detector ◽  
Phase Locked Loops ◽  
Optical Phase

scholarly journals Quantitative FRET Analysis by Fast Acquisition Time Domain FLIM at High Spatial Resolution in Living Cells

2008 ◽  
Vol 95 (6) ◽  
pp. 2976-2988 ◽  
Author(s):  
Sergi Padilla-Parra ◽  
Nicolas Audugé ◽  
Maïté Coppey-Moisan ◽  
Marc Tramier
Keyword(s):  
Spatial Resolution ◽  
Time Domain ◽  
High Spatial Resolution ◽  
Living Cells ◽  
Acquisition Time ◽  
Fast Acquisition ◽  
Quantitative Fret Analysis

scholarly journals Non-linear behaviour of charge-pump phase-locked loops

2010 ◽  
Vol 8 ◽  
pp. 161-166 ◽  
Author(s):  
C. Wiegand ◽  
C. Hedayat ◽  
U. Hilleringmann
Keyword(s):  
Linear Model ◽  
Dead Zone ◽  
Charge Pump ◽  
Phase Detector ◽  
Phase Locked Loops ◽  
Time Varying ◽  
Invariant Representation ◽  
Non Linear ◽  
Linear Behaviour ◽  
Time Invariant

Abstract. The analysis of the mixed analogue and digital structure of charge-pump phase-locked loops (CP-PLL) is a challenge in modelling and simulation. In most cases the system is designed and characterized using its continuous linear model or its discrete linear model neglecting its non-linear switching behaviour. I.e., the time-varying model is approximated by a time-invariant representation using its average dynamics. Depending on what kind of phase detector is used, the scopes of validity of these approximations are different. Here, a preeminent characterization and simulation technique based on the systems event-driven feature is presented, merging the logical and analogue inherent characteristics of the system. In particular, the high-grade non-linear locking process and the dead-zone are analyzed.

scholarly journals Nanometric axial localization of single fluorescent molecules with modulated excitation

2019 ◽  
Author(s):  
Pierre Jouchet ◽  
Clément Cabriel ◽  
Nicolas Bourg ◽  
Marion Bardou ◽  
Christian Poüs ◽  
...  
Keyword(s):  
Super Resolution ◽  
Acquisition Time ◽  
Distance Measurements ◽  
Time Modulation ◽  
Fluorescent Response ◽  
Capture Range ◽  
Localization Precision ◽  
Excitation Pattern ◽  
Sparse Samples ◽  
Lateral Localization

AbstractStrategies have been developed in LIDAR to perform distance measurements for non-coherent emission in sparse samples based on excitation modulation. Super-resolution fluorescence microscopy is also striving to perform axial localization but through entirely different approaches. Here we revisit the amplitude modulated LIDAR approach to reach nanometric localization precision and we successfully adapt it to bring distinct advantages to super-resolution microscopy. The excitation pattern is performed by interference enabling the decoupling between spatial and time modulation. The localization of a single emitter is performed by measuring the relative phase of its linear fluorescent response to the known shifting excitation field. Taking advantage of a tilted interfering configuration, we obtain a typical axial localization precision of 7.5 nm over the entire field of view and the axial capture range, without compromising on the acquisition time, the emitter density or the lateral localization precision. The interfering pattern being robust to optical aberrations, this modulated localization (ModLoc) strategy is particularly well suited for observations deep in the samples. Images performed on various biological samples show that the localization precision remains nearly constant up to several micrometers.

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