The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 1986
Filed:
Nov. 02, 1984
Milton D Bloomer, Scotia, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Multiplexing apparatus interconnects at least one power switching device, itself connected to a load for controlling of flow of current through that load from an AC source, with a control circuit for controlling conduction of the switching device(s). The multiplexing apparatus uses a full-wave rectifier for providing both half-cycles of the source AC signal waveform, transformed to have a common preselected polarity, with a first DC level to obtain zero crossing information for determining the start of switching device conduction. The same comparator is utilized with a level switch, now providing a second DC level, and a resistive divider for attenuating the voltage across the conducting switching device by a known factor, for monitoring the switching device saturation voltage during conduction. The apparatus may also include a power supply subcircuit, for providing an operating potential to a completely integrated semiconductor circuit containing this apparatus.