PASSIVE SWITCHED-CAPACITOR FILTERS CONFORMING TO POWER CONSTRAINT

Japanese Patent JP2015039197

A

PROBLEM TO BE SOLVED: To provide filters that occupy a small area and consume low power.SOLUTION: A passive switched-capacitor (PSC) filter 1000 implements a second-order infinite impulse response (IIR) filter with two complex first-order IIR sections. Each complex first-order IIR section includes three sets of capacitors. A first set of capacitors receives a real input signal and an imaginary delayed signal, stores and shares electrical charges, and provides a real filtered signal. A second set of capacitors receives an imaginary input signal and a real delayed signal, stores and shares electrical charges, and provides an imaginary filtered signal. A third set of capacitors receives the real and imaginary filtered signals, stores and shares electrical charges, and provides the real and imaginary delayed signals.

PAN CHENGZHI
BURKE JOSEPH

JP2014194047A

February 26, 2015

September 24, 2014

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QUALCOMM INC

H03H19/00; H03H17/02

JPH06334481A	1994-12-02
JP2006211153A	2006-08-10
JP2006352455A	2006-12-28
JP2007324659A	2007-12-13
JP2008011493A	2008-01-17
JP2009005088A	2009-01-08
JPS5521697A	1980-02-15

WO2002025803A2	2002-03-28
WO2009004818A1	2009-01-08
US20030035499A1	2003-02-20
US20050233725A1	2005-10-20
WO2001022582A1	2001-03-29

JPN5012013740; ＭＡＳＫＥＬＬ　Ｄ　Ｌ: 'ＡＮＡＬＹＳＩＳ　ＯＦ　ＥＶＥＮ　ＯＲＤＥＲ　ＩＩＲ　ＤＩＧＩＴＡＬ　ＦＩＬＴＥＲＳ　ＩＭＰＬＥＭＥＮＴＥＤ　ＡＳ　Ａ　ＣＡＳＣＡＤＥ　ＯＦ　ＦＩＲＳＴ　ＯＲＤＥＲ　以下備考' Ｐｒｏｃｅｅｄｉｎｇｓ　ｏｆ　ｔｈｅ　１９８８　ＩＥＥＥ　Ｉｎｔｅｒｎａｔｉｏｎａｌ　Ｓｙｍｐｏｓｉｕｍ　ｏｎ　Ｃｉｒｃｕｉｔｓ　ａｎｄ　Ｓｙｓｔｅｍｓ , 19880607, Ｐ５３１-５３４

Masatoshi Kurata
Toshihiro Fukuhara
Nobuhisa Nogawa
Peak Takashi
Naoki Kono
Sunagawa 克
Iseki Mamoru 3
Tadashi Inoue
Tatsushi Sato
Okada Kishi
Mihoko Horiuchi

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