Techniques to Reduce Folding of Noise and Interferers in PLL Charge-Pump
2008 (English)In: 15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008: St. Julian's; 31 August 2008 through 3 September 2008, 2008Conference paper (Refereed)
Due to its strongly non-linear operation, charge-pump Phase Locked Loops (PLL) suffer from folding of noise and interferers. Analysis and methods reducing this effect are scarce. We analyze and propose firstly band-limiting the charge pump currents and secondly carefully selecting the minimum phase detector pulse width to eliminate specific interferers. A PLL has also been measured confirming the predicted results. Measured improvements are typically 5 dB and 20 dB for the two methods, respectively.
Place, publisher, year, edition, pages
Antenna phased arrays; Electric charge; Pumps; Charge pump currents; Linear operations; Minimum phase
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-8287DOI: 10.1109/ICECS.2008.4675041ScopusID: 2-s2.0-57849164217ISBN: 978-1-4244-2181-7OAI: oai:DiVA.org:kth-8287DiVA: diva2:13567
QC 20100817. Uppdaterad från manuskript till konferensbidrag (20100817).2008-04-252008-04-252010-08-17Bibliographically approved