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. 13, 2007
Filed:
Apr. 09, 2003
Yoo Sam NA, Seoul, KR;
Hyo Seok Kwon, Kyungki-do, KR;
Ki Won Choi, Kyungki-do, KR;
Seung Min OH, Chunlabook-do, KR;
Yoo Sam Na, Seoul, KR;
Hyo Seok Kwon, Kyungki-do, KR;
Ki Won Choi, Kyungki-do, KR;
Seung Min Oh, Chunlabook-do, KR;
Samsung Electro-Mechanics Co., Ltd., Kyungki-Do, KR;
Abstract
A linear channel select filter for an Intermediate Frequency selector of a satellite broadcasting tuner, linearly changes a desired frequency by adjusting an output current, and includes: a transconductance (GM) current cell controller for determining a control voltage according to a select signal, generating the output current according to an differential input voltage, linearly controlling the output current according to the control voltage, and providing a linearly variable resistance according to the linearly controlled output current, and a capacitor circuit coupled to the GM cell controller to provide a capacitance to generate a cutoff frequency voltage according to the output current and the variable resistance. An occupying area and a size of the filter are reduced.