Sampling Phase Detection
نویسندگان
چکیده
In PLL designs, a wide loop bandwidth is often desired as it offers fast settling time, reduces on-chip loop filter area and sensitivity of the VCO to pulling. The reference spur is a major issue when the bandwidth is increased, because ripples on the VCO control line undergo less filtering by the loop filter. This paper proposes design techniques based on sub-sampling phase detection to reduce the reference spur of a 2.2GHz PLL to -80dBc at a high loop-bandwidth-to-reference-frequency ratio (fBW/fref) of 1/20.
منابع مشابه
Random phase detection in multidimensional NMR.
Despite advances in resolution accompanying the development of high-field superconducting magnets, biomolecular applications of NMR require multiple dimensions in order to resolve individual resonances, and the achievable resolution is typically limited by practical constraints on measuring time. In addition to the need for measuring long evolution times to obtain high resolution, the need to d...
متن کاملDisk-Based Successive Sampling for Outlier Detection in High Dimensional Data
We propose a sampling based outlier detection method for large high-dimensional data. Our method consists of two phases. In the first phase, we combine a “successive sampling” strategy with a simple randomized partitioning technique to generate a candidate set of outliers. This phase requires one full data scan and the running time has linear complexity with respect to the size and dimensionali...
متن کاملExponential Moments of Canonical Phase: Homodyne Measurements
A method for direct sampling of the exponential moments of canonical phase from the data recorded in balanced homodyne detection is presented. Analytical expressions for the sampling functions are shown which are valid for arbitrary states. A numerical simulation illustrates the applicability of the method and compares it with the direct measurement of phase by means of double homodyning.
متن کاملPredictive Current Method for Single Open-phase Fault Detection in Permanent Magnet Synchronous Machine
Fault detection and post-fault operation are two functionalities of modern fault-tolerant system. In this paper, a new current predictive method for single open-phase fault (SOPF) detection in permanent magnet synchronous machine (PMSM) is presented. Major advantage of the proposed method is the capability of detecting open-phase fault in a few sampling intervals (few hundreds of μs). Also, an ...
متن کاملAnalysis and mitigation of phase noise and sampling jitter in OFDM radio receivers
This article addresses the analysis and digital signal processing (DSP)-based mitigation of phase noise and sampling clock jitter in orthogonal frequency division multiplexing (OFDM) radios. In the phase noise studies, the basic direct-conversion receiver architecture case is assumed with noisy downconverting oscillator. In the sampling jitter case, on the other hand, the so-called direct-radio...
متن کاملDisk-Based Sampling for Outlier Detection in High Dimensional Data
We propose an efficient sampling based outlier detection method for large high-dimensional data. Our method consists of two phases. In the first phase, we combine a “sampling” strategy with a simple randomized partitioning technique to generate a candidate set of outliers. This phase requires one full data scan and the running time has linear complexity with respect to the size and dimensionali...
متن کامل