Title :
A Frequency-Modulated Resistance-Capitance Oscillator
Author_Institution :
Stanford University, California
Abstract :
A method of producing frequency-modulated waves is described in which a resistance element in a resistance-capacitance-tuned oscillator is replaced by the output resistance of a variable-μ tube. As the grid potential of the latter tube is varied, its output resistance varies, and a wide-band frequency modulation of the oscillator is obtained. Mathematical relations between the frequency variation and the grid-potential change are derived. Experimental results are discussed.
Keywords :
Circuits; Dispersion; Electron tubes; Frequency modulation; Gratings; Interference elimination; Negative feedback; Voltage; Voltage-controlled oscillators; Wideband;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1943.232385
