ACTIVATION SIGNAL OUTPUT CIRCUIT AND DETERMINING CIRCUIT

WIPO Patent Application WO/2004/055970

A1

In an activation signal output circuit having an RF/DC converting circuit for receiving a high frequency power (RF) of a particular frequency to output a DC potential (DC), there is provided a detecting/amplifying part (210) comprising a voltage doubler detector circuit (10) having a detection diode Q1 (Tr34) for detecting a high frequency power; a differential amplifier having a differential pair of transistors (Tr31,Tr32); and a current mirror circuit, wherein the base current of one of the differential pair of transistors (Tr31) is caused to be approximately equal to the DC component of a current flowing through the detection diode Q1 (Tr34), and the sum of currents flowing through the differential pair of transistors (Tr31,Tr32) is caused to be approximately constant by the current mirror circuit. In this way, an activation signal output circuit can be realized which is small-sized and exhibits a high sensitivity and a low power consumption.

JPS60128701	BIAS CIRCUIT
JP2003198286	DIFFERENTIAL AMPLIFIER CIRCUIT USING IMPEDANCE TRANSMISSION
JPH0794967	DIFFERENTIAL AMPLIFIER

MIZUNO KAZUO (JP)
KIMURA RYU (JP)
KAGO YOSHIYUKI (JP)
TANAKA YUKIOMI (JP)
ENDO KAZUHIKO (JP)
UDA HISANORI (JP)
HAYASHI HIROAKI (JP)

PCT/JP2003/015114

July 01, 2004

November 26, 2003

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DNESO CORP (JP)
MIZUNO KAZUO (JP)
KIMURA RYU (JP)
KAGO YOSHIYUKI (JP)
TANAKA YUKIOMI (JP)
ENDO KAZUHIKO (JP)
UDA HISANORI (JP)
HAYASHI HIROAKI (JP)

H03F3/45; H03D1/10; H03D1/18; H03F3/68; (IPC1-7): H03D1/10; H03D1/18

JPS6391572A	1988-04-22
JPS61148903A	1986-07-07
JPS61237504A	1986-10-22
JPH0435308A	1992-02-06
JP2002517929A	2002-06-18
JP2002314341A	2002-10-25

See also references of EP 1569329A4

Yahagi, Kazuyuki (Takisada Bldg. 2-13-19, Nishiki, Naka-k, Nagoya-city Aichi, JP)

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