Frequency Stability Improvement in Direct Digital Frequency Synthesis

Autor: I. Balaz, V. Stofanik
Jazyk: angličtina
Rok vydání: 2004
Předmět:
Zdroj: Radioengineering, Vol 13, Iss 2, Pp 17-19 (2004)
Druh dokumentu: article
ISSN: 1210-2512
Popis: The paper describes a digital frequency synthesizer thatincorporates a novel method of the clock signal frequency versustemperature dependency compensation. The clock signal is deriveddirectly from a dual mode crystal oscillator (DMXO). With introducingthe method, synthesized signal frequency versus temperature instabilitybelow a0.15ppm can be obtained over a wide temperature range (between45°C and +85°C). Since a temperature information is obtaineddirectly from a crystal itself rather than from an external sensor,temperature offset and lag effects are eliminated.
Databáze: Directory of Open Access Journals