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...

V m f 4 AbstractA phase-locked loop (PLL) frequency synthesizer architecture for multiple-band applications is presented. A dynamically-controlled switched tuning voltage-controlled oscillator (VCO) is used to achieve superior frequency range and phase noise performance over a conventional PLL. . Implemented in 1 .w CMOS, the PLL has a 111-29OMHz range, phase noise of -92.3dBdHz at a 5OkHz offs...

A low-power 1.6-GHz phase-locked loop (PLL) based on a novel supply-regulated voltage-controlled oscillator (SR-VCO) including an active-loop filter (ALF) is realized. In this PLL, an active RC filter is combined with SR-VCO, achieving the advantages of ALF PLL without penalties in power consumption or phase noises. The PLL has measured rms jitter of 4.82 ps, and its core consumes 990 μW from 1...

Abstract Wideband hybrid frequency synthesizer with phase-locked loop (PLL) and high-speed direct-to-analog converter (DAC) is presented. The use of special DAC operating modes allows to expand the generating band. Presented also provides a low phase noise due using RF mixer in PLL feedback.

This work aims at analyzing three different techniques for synchronizing RF oscillators. These techniques are Injection Locking (ILO), Phase Locked Loop (PLL) and Injection Locked Phase Locked Loop (ILPLL). ILPLL, which is a combination of PLL and ILO, has superior noise performance –compared to all the restat medium frequency offsets and the same noise performance at low and high offsets. Furt...

A phase-locked loop (PLL) and delay-locked loop (DLL) design with adaptively adjusting bandwidth enables optimal performance over a wide frequency range and across process, voltage, and temperature variations. A design methodology of such adaptive-bandwidth PLLs and DLLs is described. To assess the impact of each circuit parameter directly, we derive a discrete-time, open-loop dynamic model of ...

We present a fully integrated Phase Locked Loop in an advanced 45nm CMOS technology. The loop filter is integrated on chip under the voltage-controlled oscillator inductor, resulting in significant area savings. The whole PLL measures only 280um by 150um. The PLL has a dual-band output for 2-2.5GHz and 4-5GHz. The circuit operates from a 0.85V supply and consumes 15.3mW for a -120dBc/Hz phase n...

Using the nonlinear second-order phase-locked loop (PLL) model the performance of the heterodyne coherent optical phase shift keying (PSK) systems with Costas loop in multichannel environment is considered in this paper for the first time. The shot noise of the corresponding photodiodes and adjacent channel interferences are described through the signal-to-noise ratio (SNR) in the loop bandwidt...

This paper presents a novel approach to obtain fast locking PLL by embedding a nonlinear element in the loop of PLL. The nonlinear element has a general parametric Taylor expansion. Using genetic algorithm (GA) we try to optimize the nonlinear element parameters. Embedding optimized nonlinear element in the loop shows enhancements in speed and stability of PLL. To evaluate the performance of th...

The analysis of the behavior Charge Pump Phase-Locked Loop (CP-PLL) is a challenging task due to its mixed-signal architecture. Out two types, i.e. Current Switched CP-PLL (CSCP-PLL) and Voltage (VSCP-PLL), prior produces symmetrical pump currents, resulting in an appropriate transient performance be analyzed. loop parameters are important set gain, target frequency, assure stability system. mo...