This report summarizes a software de…ned phase locked loop and its connection to standard second-order loop design parameter for a integrating VCO and DDFS frequency synthesizer. 1 Introduction Phase locked loops (PLLs) have been used since the early development of radio. Critical paper collections [1] and books [2] cover the subject matter, which includes nonlinear feedback and stochastic di¤e...

Due to technology limitations as well as stringent operating conditions that are imposed, the design of fully integrated analog RF front-end circuits is aimed at the edge of the required performances. Such an approach implies that each dB of power or noise is of high importance, as it directly determines the range of operation of a system. Accordingly, a design trajectory that offers certain po...

This research addresses the special requirements of phase locked loops (PLLs) for a typical application with FACTS elements. A new PLL system that uses adaptation algorithms is developed with the aim of improving speed of responses, robustness to AC voltage depressions, and harmonic rejection. The adaptive PLL consists of the three control units that individually control frequency, phase angle,...

• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version ...

This paper describes the design and implementation of a current-mode phase-locked loop (PLL) using static and dynamic (log-domain) translinear circuits. The loop is fully tuneable, with independent control of center frequency and loop bandwidth. The loop employs a recently proposed current-mode “log-domain” oscillator in a classical PLL topology to obtain these features. The PLL has been fabric...

Introduction Phase-locked loops (PLLs) are one of the basic building blocks in modern electronic systems. They have been widely used in communications, multimedia and many other applications. The theory and mathematical models used to describe PLLs are of two types: linear and nonlinear. Nonlinear theory is often complicated and difficult to deal with in real-world designs. Analog PLLs have bee...

Loop distribution and loop fusion are two effective loop transformation techniques to optimize the execution of the programs in DSP applications. In this paper, we propose a new technique combining loop distribution with direct loop fusion, which will improve the timing performance without jeopardizing the code size. We first develop the loop distribution theorems that state the legality condit...

This paper presents a review of phase locked loop (PLL) techniques. The different types of phase detector, loop filter and oscillators are discussed. It alleviates the problems associated with the classical analog PLL. Linear PLL, Digital PLL and All digital PLL models are implemented in Simulink Simulation results in Simulink gives the performance overview of the three types of PLL. Keywords— ...

We present here an analytical phase noise model of phased-locked loop for frequency synthesizer and its simulation in GHz frequency range. The noise model has been derived and simulated considering two different filter sections in the loop of the phased-locked loop model, namely: (i) active lag-lead filter and (ii) standard feedback approach. The noise transfer functions of the phased-locked lo...