0303800 - URE-Y 20010023 RIV CZ eng C - Conference Paper (international conference)
Kroupa, Věnceslav František - Štursa, Jarmil
Frequency stability of fractional-N synthesizers.
Brno: Institute of Radio Electronics University of Technology, 2001. ISBN 80-214-1861-3. In: Radioelektronika 2001. Conference Proceedings. - (Svačina, J.; Kolka, Z.), s. 90-93
[Radioelektronika'2001 /11./. Brno (CZ), 10.05.2001-11.05.2001 (K)]
R&D Projects: GA ČR GA102/00/0958
Institutional research plan: CEZ:AV0Z2067918
Keywords : phase locked loops * frequency synthesizers
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering

The spectral properties of the PLL frequency synthesizer operating in the fractional-N mode are investigated. This operation is based on the swallowing of pulses in the feedback path of the PLL. The pulse swallower is controlled by the steering signal which is generated by the network DDFS operating as a ä-delta modulator of a given order. The influence of the modulator order on phase spectrum of the steering signal is shown.
Permanent Link: http://hdl.handle.net/11104/0113984