Title :
Comment on "Variable frequency crystal oscillators"
Author :
Capparelli, F. ; Verrazzani, L.
Abstract :
In a practical variable frequency crystal oscillator the difference between the operating and series resonant frequencies is always smaller than fp- fs. This limitation can be overcome by a negative capacitance realized using a NIC which does not seriously degrade overall stability.
Keywords :
Chromium; Circuit stability; Couplings; Differential equations; Frequency; Nuclear and plasma sciences; Oscillators; Plasma waves; Silicon; Temperature;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1967.5917
