デジタル信号送受信機 - Matsushita Electric Industrial Co., Ltd

Title:

デジタル信号送受信機

Document Type and Number:

Japanese Patent JP4045978

Kind Code:

B2

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.

Inventors:

Masaaki Noda
Osamu Asayama
Hiroshi Ando
Hideki Ueda
Mitsuru Kaito

Application Number:

JP2003047306A

Publication Date:

February 13, 2008

Filing Date:

February 25, 2003

Export Citation:

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