WO2008038107A3 - Band-pass filter and receiver including the same - Google Patents

Band-pass filter and receiver including the same Download PDF

Info

Publication number
WO2008038107A3
WO2008038107A3 PCT/IB2007/002796 IB2007002796W WO2008038107A3 WO 2008038107 A3 WO2008038107 A3 WO 2008038107A3 IB 2007002796 W IB2007002796 W IB 2007002796W WO 2008038107 A3 WO2008038107 A3 WO 2008038107A3
Authority
WO
WIPO (PCT)
Prior art keywords
pass filter
band
component
low
same
Prior art date
Application number
PCT/IB2007/002796
Other languages
French (fr)
Other versions
WO2008038107A2 (en
Inventor
Hiroki Okada
Original Assignee
Toyota Motor Co Ltd
Hiroki Okada
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Co Ltd, Hiroki Okada filed Critical Toyota Motor Co Ltd
Publication of WO2008038107A2 publication Critical patent/WO2008038107A2/en
Publication of WO2008038107A3 publication Critical patent/WO2008038107A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2210/00—Indexing scheme relating to details of tunable filters
    • H03H2210/01—Tuned parameter of filter characteristics
    • H03H2210/015—Quality factor or bandwidth

Abstract

A band-pass filter includes: a distributor (24) for distributing an input signal into two signals; a first low-pass filter (28) that passes a component of one of the two signals into which the input signal is distributed by the distributor (24), the component having a frequency lower than a cutoff frequency fl; a phase shifter (30) that converts a signal output from the first low-pass filter (28) so that the phase thereof is shifted by 180°; a mixer (32) that combines the other of the two signals into which the input signal is distributed by the distributor (24) with a signal output from the phase shifter (30); and a second low-pass filter (34) that passes a component of a signal output from the mixer (32), the component having a frequency lower than a second cutoff frequency f2 that is higher than the cutoff frequency fl of the first low-pass filter (28).
PCT/IB2007/002796 2006-09-27 2007-09-26 Band-pass filter and receiver including the same WO2008038107A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-263247 2006-09-27
JP2006263247A JP2008085653A (en) 2006-09-27 2006-09-27 Bandpass type filter

Publications (2)

Publication Number Publication Date
WO2008038107A2 WO2008038107A2 (en) 2008-04-03
WO2008038107A3 true WO2008038107A3 (en) 2008-09-04

Family

ID=39154396

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/002796 WO2008038107A2 (en) 2006-09-27 2007-09-26 Band-pass filter and receiver including the same

Country Status (2)

Country Link
JP (1) JP2008085653A (en)
WO (1) WO2008038107A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102521756B1 (en) * 2016-06-22 2023-04-14 삼성전자주식회사 Delay circuit of semiconductor memory device, semiconductor memory device and method of operating the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5581800A (en) * 1991-09-30 1996-12-03 The Arbitron Company Method and apparatus for automatically identifying a program including a sound signal
WO1999035882A1 (en) * 1998-01-12 1999-07-15 Imperial College Of Science, Technology & Medicine Audio signal processors
GB2394373A (en) * 2002-10-19 2004-04-21 Zarlink Semiconductor Ltd A receiver for analog and digital signals which uses a digital signal processor for filtering

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5581800A (en) * 1991-09-30 1996-12-03 The Arbitron Company Method and apparatus for automatically identifying a program including a sound signal
WO1999035882A1 (en) * 1998-01-12 1999-07-15 Imperial College Of Science, Technology & Medicine Audio signal processors
GB2394373A (en) * 2002-10-19 2004-04-21 Zarlink Semiconductor Ltd A receiver for analog and digital signals which uses a digital signal processor for filtering

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
2005 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM 12-17 JUNE 2005 LONG BEACH, CA, USA, 12 June 2005 (2005-06-12) - 17 June 2005 (2005-06-17), 2005 IEEE MTT-S International Microwave Symposium (IEEE Cat. No.05CH37620C) IEEE Piscatway, NJ, USA, pages 4 pp., ISBN: 0-7803-8845-3 *
DATABASE INSPEC [online] THE INSTITUTION OF ELECTRICAL ENGINEERS, STEVENAGE, GB; 2005, PILLANS B ET AL: "6-15 GHz RF MEMS tunable filters", XP002472730, Database accession no. 8804027 *
STEVEN W. SMITH: "Books Editions, Titles, and Bindings", XP002472729, Retrieved from the Internet <URL:http://www.dspguide.com/editions.htm> [retrieved on 20080311] *
STEVEN W. SMITH: "Introduction to Digital Filters", 1 January 1997 (1997-01-01), XP002472728, Retrieved from the Internet <URL:http://www.dspguide.com/CH14.PDF> [retrieved on 20080311] *

Also Published As

Publication number Publication date
WO2008038107A2 (en) 2008-04-03
JP2008085653A (en) 2008-04-10

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