Oscillators – Relaxation oscillators
Patent
1974-10-21
1976-04-27
Shoop, William M.
Oscillators
Relaxation oscillators
321 45C, 331113A, H02M 700
Patent
active
039537803
ABSTRACT:
An electrical inverter circuit for converting d.c. electrical input into an a.c. electrical output involving the control of active switch elements in the primary of an output transformer circuit by, in part, providing a further controllable active element in circuit with the active element switches such that the primary winding current also flows therethrough. Synchronous control means are provided for synchronously controlling this further active element so as to increase its electrical impedance during at least a portion of each switching transition of the active element switch means so as to further aid and promote the rapid and efficient transitioning of the active element switches. Various alternative circuits are shown for this and for detecting the switch point as a function of primary transformer winding current and for further controlling the transition of the active switches in combination with the increased electrical impedance of the further controllable active element in circuit therewith.
REFERENCES:
patent: 3305756 (1967-02-01), Doss et al.
patent: 3334312 (1967-08-01), Funfstuck
patent: 3350661 (1967-10-01), Bloom et al.
patent: 3369195 (1968-02-01), Zollinger et al.
patent: 3387228 (1968-06-01), Randall
patent: 3500168 (1970-03-01), Merritt
patent: 3646578 (1972-02-01), Gregory
patent: 3758841 (1973-09-01), Bourbeau
patent: 3781638 (1973-12-01), Anderson et al.
Anderson Thomas E.
Walden John P.
Cohen Joseph T.
General Electric Company
Salai Stephen B.
Shoop William M.
Squillaro Jerome C.
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