Transistor voltage converter

摘要: 949,790. Converting. PHILIPS ELECTRICAL INDUSTRIES Ltd. Nov. 9, 1960 [Nov. 12, 1959], No. 38496/60. Heading H2F. [Also in Division H3T] A push-pull transistor oscillator, more particularly for a D.C. to converter, has tuned centre-tapped collector winding determining the oscillation frequency and small inductance connected circuits so as prevent transistors, when conducting, from short circuiting tuning capacitance provide switch-off pulse bases. Fig. 1 shows oscillator of basic type described Specification 909,969, but not accordance with invention. The main feedback via transformer is supplemented by C.R. 5, 6, 16, 17 which pulses, leading phase, offset effect charge storage transistors due operating near α cut-off frequency. inductor 23 added common portion circuit too rapid rise current are switched on. resulting across reduces voltage lengthens pulses applied base at trailing edges. In 2, additional inductors provided each and, invention, windings 24 coupled these bases addition, capacitors 6 transferred secondary windings. further embodiment (Fig. 3, shown), series emitter circuits. rectifier may be output terminals supply. 909,969 referred to.