Title :
Development of a digitally controlled rubidium atomic oscillator
Author :
Ishihara, Naoki ; Fukugawa, Shin-ichi ; Kodama, Shigenori ; Makabe, Takayoshi
Author_Institution :
NEC Corp., Kanagawa, Japan
Abstract :
A digitally controlled rubidium oscillator (DCRO) which can synchronize another frequency source is described. A±3×10 -8 wide frequency control range which has good linearity, and a 1×10-12 fine control step are highlighted. A synthesizer which has three stage phase locked loop oscillators with variable frequency dividers is discussed. Data for controlling the frequency dividers, written in a 3 Mbit ROM, were calculated using a computer
Keywords :
atomic beams; atomic clocks; digital control; frequency control; frequency dividers; frequency measurement; frequency synthesizers; phase-locked loops; rubidium; synchronisation; variable-frequency oscillators; ROM; Rb atomic oscillator; computer; digitally controlled oscillator; fine control step; frequency control; frequency source; linearity; synthesizer; three stage phase locked loop oscillators; variable frequency dividers; Control systems; Digital control; Frequency control; Frequency conversion; Frequency synchronization; Frequency synthesizers; Oscillators; Phase locked loops; Resonant frequency; Stability;
Conference_Titel :
Frequency Control, 1990., Proceedings of the 44th Annual Symposium on
Conference_Location :
Baltimore, MD
DOI :
10.1109/FREQ.1990.177480
