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:
Feb. 25, 1986
Filed:
Feb. 28, 1984
Kunio Numata, Fujisawa, JP;
Yoshiaki Nishiyama, Hiratsuka, JP;
NCR Corporation, Dayton, OH (US);
Abstract
A self-excited switching type D.C. power supply for producing a stabilized output signal. The power supply is provided with a rectifier, a primary winding of a transformer, a switching transistor and a resistor connected in series with one another between first and second input terminals of the power supply. The transformer is further provided with a secondary winding, a Zener diode, a capacitor and a resistor connected in series with a photocoupler. The photocoupler is connected in series with a pair of control transistors which control the operation of the switching transistor. The switching frequency of the switching transistor is stabilized by providing a quiescent time period during which the switching transistor is disabled.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile