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Frequency control technique applicable to either voltage- or current-feedback magnetically-coupled switching-transistor oscillators

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4 Author(s)
Moore, Edward T. ; Wilmore Electronics Company, Inc., Durham, N.C. ; Wilson, T.G. ; McIntire, Joseph N. ; Cox, D.

Through the use of nonlinear circuit techniques similar to those normally associated with series-connected magnetic amplifiers, it is possible to modify the basic circuits of almost all of the numerous types of magnetically-coupled switching-transistor multivibrators so as to provide for frequency control of these circuits by means of a low-level dc control signal. Using two well-known types of such inverter circuits as examples, this paper describes the basic principles involved in this frequency control technique and discusses the operation of two test circuits. A primary advantage of this frequency control method is its physical simplicity and low cost.

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Magnetics, IEEE Transactions on  (Volume:3 ,  Issue: 3 )