Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-3-6391-2247-3 |
Объём: | 116 страниц |
Масса: | 196 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 1 |
This book presents a wideband GFSK-modulated fractional-N frequency synthesizer which using the two-point delta-sigma modulation (TPDSM). Two bottlenecks in this design have been rigorously investigated. One is the nonlinear performance of fractional-N frequency synthesizers. The other one is the inherent gain and delay mismatch between the two modulation points. Both nonlinear and mismatch factors dominate the modulation accuracy in the closed phase-locked loop (PLL). The proposed formulation can successfully predict the dependencies of the modulation accuracy on both factors. The comparison of the averaged frequency deviation and frequency-shift-keying (FSK) error between theory and measurement shows excellent agreement. The modulated frequency synthesizer implemented in this study can achieve a 2.5 Mbps data rate as well as a 15 ?s PLL stable time with only 2.2 % FSK error under good design and operating conditions.
Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.