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:
Jan. 10, 2006
Filed:
Feb. 01, 2000
Masahiro Kato, Nagaokakyo, JP;
Masahiro Kato, Nagaokakyo, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A satellite broadcasting receiver (LNB) receiving signal radio waves from broadcasting satellites is provided with a low noise amplifier (LNA) amplifying a received signal, and a frequency converting circuit converting an output from the LNA to an intermediate frequency signal for output. The LNA includes four amplifiers in the first stage respectively amplifying four types of different received signals. A power supply control circuit sets a current flowing through one of four amplifiers at a prescribed value and sets currents flowing through all the other amplifiers at 0. Thus, the output from only one amplifier is supplied to the amplifier in the second stage for amplification and further applied to the frequency converting circuit. Accordingly, the amplifiers in the first stage do not simultaneously consume currents, and a switching circuit is not necessary.