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This dissertation presents the design and implementation of a PLL system with adaptive supply noise cancellation. The PLL system effectively cancels the supply induced jitter at the PLL output with very low power and area overhead.Phase-Locked Loops are widely used in high-performance digital systems to generate well-timed clocks. The timing uncertainty in the PLL"s output clock limits the system performance. One of the dominating noise sources in the PLLs is the noise of the power supply. The switching activities of digital blocks contribute a large amount of noise on the supply lines in the digital systems.The PLL is designed with a programmable supply noise cancellation circuit and a fitter measurement system. A minimization algorithm can effectively program the cancellation circuit for the best jitter performance of the system. The proposed PLL along with the jitter cancellation circuits can reduce the supply induced jitter by more than 11 dB.
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A phase-locked loop is used to determine the fundamental frequency of the periodic component of the primary noise. Adaptive control of the residual noise is achieved with a least mean square method. This paper investigates a novel three-phase PLL which is capable of locking to the phase and frequency of three-phase ac supply voltage under distorted conditions, which is based on the conventional PLL structure followed by an adaptive notch filter File Size: KB. Phase Locked Loops (PLLs) are electronic circuits used for frequency control. Anything using radio waves, from simple radios and cell phones to sophisticated military communications gear uses communications industry’s big move into wireless in the past two years has made this mature topic red hot again. The fifth edition of this classic circuit /5(2). A phase-locked-loop(PLL) is a servo system, or, in other words, a feedback loop that operates with frequencies and phases. PLL's are well known to be quite useful (powerful, in fact) in communications systems, where they can pluck tiny signals out of large noises. Here, however, we will discuss a new kind.
The text then discusses both linear and nonlinear methods that are used to analyze the basic PLL book includes extensive coverage of the nonlinear behavior of phase-locked loops, an important area of this field and one where exciting new research is being performed. No other book available covers this critical area in such careful detail.3/5(1). A Low-Jitter Ring-Oscillator Phase-Locked Loop Using Feedforward Noise Cancellation With a Sub-Sampling Phase Detector Abstract: Ring-oscillator (RO)-based phase-locked loops (PLLs) are very attractive for system-on-chip applications for their compactness and tuning range, but suffer from high jitter and supply noise by: 2. Three-Phase Phase-Locked Loop Control of a New Generation Power Converter converter must comply with the psophometric noise standard CCIF and the IEC harmonic standard. While the IEC standard is easily met immune to dc power supply noise. The psophometric. This paper describes a fully integrated low-jitter CMOS phase-locked loop and clock buffer for low-power digital systems with a wide range of operating frequencies.
This paper proposes a howling reduction circuit using analog phase-locked loop (PLL) and active noise control (ANC) circuits. The proposed circuit reduces howling by generating a signal opposite in phase to howling. To make a signal with the same frequency as howling, we employed the PLL by: 1. Phase-Locked Loops: A Control Centric Tutorial Daniel Abramovitch discussed, followed by loop components and a cursory look at noise. Finally, the paper will end with a discussion of diﬀer- Phase-locked loops (PLLs) have been around for many years[1, 2]. Gardner’s short history links the earliest. The worst-case phase noise of the IC is dBc/Hz and dBc/Hz at kHz and 3 MHz offsets, respectively, and the adaptive phase noise cancellation technique has a worst-case settling time of 35 s. The IC is implemented in m CMOS technology. It measures mm 2, and its core circuitry consumes mA from a V supply. Designing High-Performance Phase-Locked Loops with High-Voltage VCOs. by Austin Harney Download PDF Introduction. The phase-locked loop (PLL) is a fundamental building block of modern communication are typically used to provide the local-oscillator (LO) function in a radio receiver or transmitter; they are also used for clock-signal distribution and noise .