Title :
Direct digital synthesiser with quasi continuous temperature compensation
Author :
Taslakov, Marian A.
Author_Institution :
Inst. of Electron., Sofia, Bulgaria
fDate :
6/23/1905 12:00:00 AM
Abstract :
In this work we suggest a new method for obtaining quasi-continuous temperature compensation of a direct digital synthesiser (DDS). The suggested method uses an entirely digital temperature compensation of the DDS output frequency. We obtained a temperature stability better than 0.2 ppm in the temperature range from -45 to +85°C for the extremely wide frequency range from 10 Hz to 140 MHz. Additional advantage of the method is that we do not use a voltage controlled crystal oscillator (XO) which improves the DDS output spectrum and eliminate a circuit source of ageing, hysteresis, and noise
Keywords :
compensation; crystal resonators; digital integrated circuits; direct digital synthesis; thermal stability; -45 to 85 C; 10 Hz to 140 MHz; 45 to +85 degrees C; ageing; digital temperature compensation; direct digital synthesiser; hysteresis; noise; output frequency; quasi-continuous temperature compensation; temperature stability; Circuits; Clocks; Error correction; Frequency conversion; Frequency synthesizers; Microcomputers; Signal resolution; Table lookup; Temperature distribution; Voltage-controlled oscillators;
Conference_Titel :
Frequency Control Symposium and PDA Exhibition, 2001. Proceedings of the 2001 IEEE International
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-7028-7
DOI :
10.1109/FREQ.2001.956386
