DISCRETE TIME ANALOG CIRCUIT AND RECEIVER USING SAME

WIPO Patent Application WO/2012/014464

A1

A discrete time analog circuit has a high degree of freedom in the zero-point and pole setting positions of a filter, and has wide band and steep filter characteristics. The discrete time analog circuit (100) is provided with: a rotate capacitor circuit (150); an amplifier (141) that is connected to the input line or the output line of the rotate capacitor (150), and amplifies the input potential or input charge; a coefficient circuit (140) that is positioned in series with the amplifier (141), and has two history capacitors (143-1, 143-2) positioned parallel to each other; a first active capacitor among the two history capacitors (143-1, 143-2) that is connected to and charges the amplifier (141); and a clock generation circuit (110) that is connected to the input line or the output line without the involvement of the amplifier (141), and that sequentially changes the pairing of the rotate capacitor circuit (150)a second active capacitor, which shares a charge with the rotate capacitor circuit (150).

JPS6148222	SWITCHED CAPACITOR FILTER
JPS5534600	INTEGRATED FILTER CIRCUIT
JPS55130214	SIGNAL CONTROLLER

SHIOZAKI HIROKA
ARAKI KIYOMICHI
MORISHITA YOHEI
KANEMARU MASAKI

PCT/JP2011/004239

February 02, 2012

July 27, 2011

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PANASONIC CORP (JP)
SHIOZAKI HIROKA
ARAKI KIYOMICHI
MORISHITA YOHEI
KANEMARU MASAKI

H03H19/00; H03K17/00; H04B1/26; H04B1/30

WO2007102459A1	2007-09-13
WO2010064450A1	2010-06-10

WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)

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