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. 25, 2008
Filed:
Feb. 19, 2004
Masaaki Noda, Gifu, JP;
Osamu Asayama, Aichi, JP;
Hiroshi Ando, Aichi, JP;
Hideaki Ueda, Aichi, JP;
Mitsuru Kaito, Gifu, JP;
Masaaki Noda, Gifu, JP;
Osamu Asayama, Aichi, JP;
Hiroshi Ando, Aichi, JP;
Hideaki Ueda, Aichi, JP;
Mitsuru Kaito, Gifu, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A digital signal transceiver includes a frequency modulator for outputting a high-frequency signal frequency-modulated with a digital signal input thereto, a power amplifier, an antenna terminal, and an antenna switch. The antenna switch includes a first branch port for receiving a signal output from the power amplifier, a common port connected to the antenna terminal, said common port being connected to the first branch port in the transmitting mode, and a second branch port connected to the common port in the receiving mode. The transceiver further includes a filter having an input port thereof connected to the second branch port of the antenna switch, a high-frequency amplifier having an input port thereof connected to an output port of the filter, and a mixer for mixing a signal output from the high-frequency amplifier with the signal output from the frequency modulator.