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. 02, 2008
Filed:
Jul. 26, 2005
Masahiko Inamori, Ibaraki, JP;
Tsunehiro Takagi, Nagaokakyo, JP;
Masao Nakayama, Ritto, JP;
Haruhiko Koizumi, Suita, JP;
Kaname Motoyoshi, Nishinomiya, JP;
Masahiko Inamori, Ibaraki, JP;
Tsunehiro Takagi, Nagaokakyo, JP;
Masao Nakayama, Ritto, JP;
Haruhiko Koizumi, Suita, JP;
Kaname Motoyoshi, Nishinomiya, JP;
Matsushita Electric Industrial Co., LTD, Osaka, JP;
Abstract
An output level of a transmission apparatusis determined, depending on an attenuation amount of an attenuator, a gain of one of a high output level amplification sectionand a low output level amplification section, which is used. A reference voltage Vref(H) is discontinuously changed. Depending on the magnitude of the reference voltage Vref(H), it is determined which of the amplification sectionsis used, and the attenuation amount of the attenuatorand the gain of the amplification sectionare also determined. When the magnitude of the reference voltage Vref(H) is changed, a sum of the attenuation amount of the attenuatorand a gain change amount of a switch amplification sectionis substantially zero.