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. 21, 1995
Filed:
Feb. 22, 1993
Jong R Kim, Seoul, KR;
Goldstar Co., Ltd., Seoul, KR;
Abstract
An apparatus for recognizing a frequency of an electric power being applied to an electric/electronic device for preventing an error operation of the electric/electronic device generated when the frequency of power supply to be applied differs from the operating frequency determined at the time of manufacture of the electric/electronic device. The apparatus has a power transformer for transforming commercial alternating current power supply to a driving voltage of the device, a period detecting section for shaping a wave form of output of the power transformer, and simultaneously generating a period detecting signal at every period of that output wave form, and a control section for counting a number of times said period detecting signal is generated during a predetermined time period, whereby the frequency of the applied power supply on basis of the number of times.