BIDIRECTIONAL FREQUENCY CONVERTER AND RADIO EQUIPMENT USING SAME

Title:

BIDIRECTIONAL FREQUENCY CONVERTER AND RADIO EQUIPMENT USING SAME

Document Type and Number:

WIPO Patent Application WO/2006/040997

Kind Code:

A1

Abstract:

A base of a bipolar transistor (1) connected to an RF terminal (13), an IF terminal (9) and an LO terminal (6) is connected to a power supply (16) through a power supply switch (11). When the power supply switch (11) is turned on and an RF signal and an LO signal are inputted to the bipolar transistor (1), a mixed signal of the both signals is outputted as an IF signal. When the power supply switch (11) is turned off, the bipolar transistor (1) operates as two diodes which connect a base terminal (4) to an emitter terminal (2) and the base terminal (4) to a collector terminal (3), and when the IF signal and the LO signal are inputted, the signals are mixed by the diode and the RF signal is outputted. Thus, a unidirectional frequency conversion has a positive conversion gain, and at the time of performing bidirectional frequency conversion by one frequency converter, an external circuit such as a signal path changing switch is eliminated.

Inventors:

HOSOKAWA YOSHIFUMI
MATSUO MICHIAKI
SAITO NORIAKI

Application Number:

PCT/JP2005/018523

Publication Date:

April 20, 2006

Filing Date:

October 06, 2005

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
HOSOKAWA YOSHIFUMI
MATSUO MICHIAKI
SAITO NORIAKI

International Classes:

H03D7/12; H04B1/40

Foreign References:

JPS61224506A	1986-10-06
JPS58138107A	1983-08-16
JPS5765904A	1982-04-21
JPS63300610A	1988-12-07
JPS55166309A	1980-12-25
JP2001358605A	2001-12-26
JP2004254009A	2004-09-09
JP3258791B2	2002-02-18
JP3369396B2	2003-01-20
JP2001358605A	2001-12-26
JP2004254009A	2004-09-09

Other References: