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. 25, 2007
Filed:
Dec. 02, 2005
Moon Sun Kim, Kyungki-do, KR;
Won Jin Baek, Kyungki-do, KR;
Moon Sun Kim, Kyungki-do, KR;
Won Jin Baek, Kyungki-do, KR;
Abstract
The invention relates to a feedback or feedforward type variable gain wideband amplifier. The variable gain wideband amplifier includes a feedback-type inversion amplifier circuitfor amplifying input Vin, a feedback-type non-inversion amplifier circuitfor amplifying input Vin, a power source circuitfor controlling the gain of the non-inversion amplifier circuitand a load circuitconnected between a junction of output terminals of the inversion and non-inversion amplifier circuitsandand power voltage potential VDD to control the gain of the amplifier circuitsandThe variable gain wideband amplifier of the invention is feedforward type, and outputs signals from the inversion and non-inversion amplifier circuitsandvia a single output terminal in order to attenuate third order intermodulation frequency IMgenerated from the amplifier circuitsandThen, predetermined frequencies fand fincluded in the input signal are amplified.