Current feedback magnetic-multivibrator with compensated frequency of oscillation

An improved current feedback magnetic-multivibrator with constant frequency of oscillation is proposed. In this circuit, the frequency compensation circuit cancels the dependence of a junction voltage on the current and the temperature. When the load current was changed from 1 A through 8 A, the rate of variation in the frequency of oscillation was reduced from about 30% (without compensation) through about 2% (with compensation). The conditions for compensation were analyzed including the influences of the internal resistances, the collector dissipation and so forth.<<ETX>>

[1]  J. Jensen An Improved Square-Wave Oscillator Circuit , 1957 .

[2]  E. T. Moore,et al.  Inverter for use with very low input voltages , 1964, IEEE Transactions on Communication and Electronics.

[3]  K. Harada,et al.  Surge Analysis of the Free-Running Transistor Inverter , 1983, INTELEC '83 - Fifth International Telecommunications Energy Conference.

[4]  Koosuke Harada,et al.  Analysis of Current Feedback Magnetic-Multivibrator , 1982 .

[5]  G. H. Royer A switching transistor D-C to A-C converter having an output frequency proportional to the D-C input voltage , 1955, Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics.

[6]  Koosuke Harada,et al.  Analysis of Jensen's Magnetic Multivibrator , 1984 .

[7]  B.T. Szpakowski Current Transformer Application for Power Switching Transistor Drive , 1979, INTELEC - 1979 International Telecommunications Energy Conference.