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:
Mar. 30, 2004
Filed:
Apr. 20, 2000
Syuuji Matsuura, Ikoma, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A tuner has a receiving unit receiving a signal input from a CATV station to an HPF. In the receiving unit, the signal is attenuated by a PIN attenuator circuit with the gain based on the signal level, thereafter the signal is amplified over a broad frequency range by a buffer amplifier, the high frequency component is amplified by a high frequency amplifier, and converted to a desired intermediate frequency signal by a frequency converting circuit including an oscillating circuit and a mixing circuit. Thereafter, the signal is IF-amplified by an IF amplifier and output through a terminal. As the signal input to the amplifier succeeding the PIN attenuator circuit is prevented from attaining a high level, signal distortion at the time of amplification can be improved, and supply current to the amplifier can be reduced.