PLL Frequency Synthesizers: Phase Noise Issues and Wide Band Loops [chapter]

Marina de Queiroz Tavares
2000 Analog Circuit Design  
PLL frequency synthesizers are widely used in telecommunication receivers and transmitters, as part of the frequency conversion block. They consist of a tunable oscillator and a programmable phase controlling loop. Current tendencies in PLL development focus noise performance and a higher integration level. The first is connected to the new digital modulation techniques, often demanding a higher CNR in the signal chain. And the second concerns a global trend towards smaller and more compact
more » ... ems. This thesis discusses and develops PLL system models to study stability and noise aspects. The model results are employed in IC and application design, being confirmed via measurements. The stability approach investigates the robustness of the PLL system, typically working with very large gain variations. A top-down system to circuit approach, studies noise generation and transmission. Finally testchip realizations of PLLs with fully gm-C integrated oscillators are presented.
doi:10.1007/978-1-4757-3198-9_17 fatcat:tc4trqyzcve2dfj57xif7dgmka