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:
May. 13, 1980
Filed:
Jan. 17, 1979
Takashi Itoh, Yokohama, JP;
Hitachi, Ltd., , JP;
Abstract
Disclosed is a vertical deflection circuit in which first and second NPN output transistors are connected in series to make up a single-ended push-pull circuit. A vertical deflection coil and a low-value resistor are connected in series between the output terminal of the push-pull circuit and the earth. The second NPN output transistor is driven by a driving transistor which amplifies the oscillated signal produced from a vertical oscillation stage. The voltage generated at the junction point of the vertical deflection coil and the low-value resistor is fed back to the driving transistor. An emitter resistor is inserted between the emitter of the second NPN output transistor and the earth, while a resistor for differentiating the amount of feedback in the former and latter halves of the vertical scanning period is inserted between the emitter of the second NPN transistor and the junction point.