Research On Agile Self-Frequency Calibration Technique For Synthesizer

Over the last several decades, the evolution of integrated circuit(IC) technology has also brought faster transistors with every new generation, modern CMOS transistors can operate and provide substantial gain well into the millimeter-wave regime. Fine-line CMOS technology has also proved advantageous in terms of integration. The rapid growth of personal communication applications has led to a commensurate demand for better and cheaper devices.The constant scaling of CMOS VLSI technologies has produced orders of magnitude of increase in packing density and operation frequency of the circuits, moving more of the signal processing in to the digital domain.An integrated frequency synthesizer in CMOS process that meets strict phase noise performance requirements of today's wireless communication standards remains a challenging problem. A frequency synthesizer is one of the major building blocks for an RF transceiver. The role of a frequency synthesizer is to provide the reference frequencyFor frequency translation in wireless transceivers.The main content of research includes:1. The principle and performance metrics of frequency synthesizer are introduced.2. A fast automatic frequency calibration technique is proposed, it can greatly decrease The calibration time comparing to the traditional calibration methods.3. A design is proposed, modeling and simulation of Fractional-N PLL synthesizers as well as the pipelined implementation of MASH typeΔΣmodulators to be used in such synthesizer.