A Method of Locking Oscillators in Integral and Non-Integral Frequency Ratios
Edgar A. G. Shaw · British Journal of Applied Physics · 1950
The output voltages of two audio oscillators required to operate in an integral or non-integral frequency ratio are applied to a non-linear mixer. The appropriate zero beat is used to provide a suitable correction voltage to a frequency determining circuit forming part of one of the oscillators. A practical arrangement is described by which an R-C oscillator may be locked with a 1 000 c/s maintained fork in quite high orders of frequency ratio (e.g. 17:7). Further development of the principle is discussed.