Oscillators – Plural oscillators – Synchronized – triggered or pulsed
Patent
1975-05-30
1977-01-04
Grimm, Siegfried H.
Oscillators
Plural oscillators
Synchronized, triggered or pulsed
307247R, 321 2, 321 49, 331 56, 331113A, 331172, 331177R, H03K 330
Patent
active
040017176
ABSTRACT:
A pulse-firing power oscillator has an iron core with a primary winding on the core and as many secondary windings as there are firing pulses to be sequentially produced in a series of pulses, with a half-wave rectifier in series with each secondary winding. A symmetrical circuit comprising back-to-back transistors is connected across the primary winding in such a manner that the base bias voltage of a transistor connected to one end of the primary winding is derived from the other end of the primary winding. A DC voltage is imposed between a center-tap on the primary winding and the common connection between the transistors which is furthest away from the center-tap -- i.e., further away from the center-tap than the base of each of the biased transistors. The oscillator is self starting, and when it is free running its frequency is voltage dependent, although broadly determined by the design of the pulse transformer including the cross-section of the core and the number of primary turns thereon. The frequency of the oscillator may be slaved to the frequency of another power source, while the output of the oscillator remains a function of the oscillator design without regard to poor wave shape or voltage fluctuations of the other power source; by forcing a minority hysteresis on the core by connecting an auxiliary independent primary winding to the other power source, or by inserting signals derived from it into the oscillator.
REFERENCES:
patent: 3026484 (1962-03-01), Bennett et al.
patent: 3136957 (1964-06-01), Putkovich et al.
patent: 3147406 (1964-09-01), Kotas
patent: 3328669 (1967-06-01), Ahmed et al.
patent: 3646578 (1972-02-01), Gregory
patent: 3875493 (1975-04-01), Kunzinger et al.
Grimm Siegfried H.
Hewson Donald E.
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