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. 26, 2009
Filed:
Mar. 30, 2006
Tae Wook Kim, Gyeonggi-do, KR;
Dong Gu Lim, Jeollabuk-do, KR;
Bonkee Kim, Gyeonggi-do, KR;
Junghwan Lee, Gyeonggi-do, KR;
Kwyro Lee, Seoul, KR;
Tae Wook Kim, Gyeonggi-do, KR;
Dong Gu Lim, Jeollabuk-do, KR;
Bonkee Kim, Gyeonggi-do, KR;
Junghwan Lee, Gyeonggi-do, KR;
Kwyro Lee, Seoul, KR;
Integrant Technologies, Inc., Gyeonggi-Do, KR;
Abstract
The present invention relates to a filter, and more particularly, to a tracking filter for selecting a channel of a wideband frequency. The tracking filter for selecting a channel of a wideband frequency, which is for increasing the selectivity of a wideband frequency, includes: a first tracking portion for filtering and amplifying a specific frequency band while converting a low input impedance of the input terminal of the tracking filter into a high impedance; a second tracking portion for maintaining the high impedance of the first tracking portion, and for filtering and amplifying the specific frequency band while increasing the selectivity Q of a frequency outputted from the first tracking portion; and a third tracking portion for filtering the specific band wherein has low input impedance and high output impedance.