Abstract
ABSTRACT A new junction-transistor oscillator circuit is described. It makes use of the internal phase-shift of a transistor and only a single C-R section as the external phase-shifting network—advantage being taken of the low-input impedance of a common emitter junction transistor. Analytic expressions for the frequency of oscillation and minimum voltage feedback factor for sustained oscillations have been deduced. Calculated values of frequency and minimum voltage feedback factor are shown to compare favourably with the experimental values. A range of oscillation frequency extending to several times the cut-off value of the transistor is shown to be obtainable.
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