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:
Sep. 19, 2006
Filed:
Sep. 29, 2005
Cheng-chia Hsu, Chupei, TW;
Teng-ho Wu, Yongkang, TW;
Ho-wen Chen, Taipei, TW;
Teng-kang Chang, Hsinchu, TW;
Cheng-Chia Hsu, Chupei, TW;
Teng-Ho Wu, Yongkang, TW;
Ho-Wen Chen, Taipei, TW;
Teng-Kang Chang, Hsinchu, TW;
Logah Technology Corp., Hsinchu, TW;
Abstract
A bridge type phase detection device comprises one or more than one transformer, a plurality of tubes, a voltage-detecting protection circuit and a first, second and third impedance, wherein a first tube of said plurality of tubes has a phase opposite to that of a second tube of said plurality of tubes, and a first end of said first impedance coupling with a secondary side of said transformer and a first end of said first tube, a first end of said second impedance coupling with said secondary side of said transformer and a first end of said second tube, then a second end of said first impedance connecting to a second end of said second impedance to form a detection point, said detection point coupling with said third impedance and said voltage-detecting protection circuit; said detection point having a voltage value derived from calculating a sum of said phase of said first impedance and that of said second impedance, then an output voltage divided among said first, two and third impedance, resulting in approximately zero voltage at said detection point during normal operation, if said voltage-detecting protection circuit detecting a non-zero voltage, it is concluded that a tube anomaly is present.