CA2059580A1 - Auto-Tuned Apparatus for Band-Pass Filter - Google Patents

Auto-Tuned Apparatus for Band-Pass Filter

Info

Publication number
CA2059580A1
CA2059580A1 CA2059580A CA2059580A CA2059580A1 CA 2059580 A1 CA2059580 A1 CA 2059580A1 CA 2059580 A CA2059580 A CA 2059580A CA 2059580 A CA2059580 A CA 2059580A CA 2059580 A1 CA2059580 A1 CA 2059580A1
Authority
CA
Canada
Prior art keywords
band
pass filter
signals
auto
outputted
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2059580A
Other languages
French (fr)
Other versions
CA2059580C (en
Inventor
Youhei Ishikawa
Hidekazu Wada
Sadao Yamashita
Hiroyuki Kubo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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
Priority claimed from JP33842591A external-priority patent/JP2727834B2/en
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of CA2059580A1 publication Critical patent/CA2059580A1/en
Application granted granted Critical
Publication of CA2059580C publication Critical patent/CA2059580C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control

Abstract

An auto-tuned apparatus for a band-pass filter, wherein, the generated reference signals having the given frequency to be set are mixed with signals to be outputted from the band-pass filter when the reference signals have been inputted to the band-pass filter so as to multiply them for outputting the signals of the multiplied results, the signals of the direct current component from the signals of the multiplied results to be outputted are filtered, and the band-pass filter is controlled so that the center frequen-cies of the band-pass filter may agree with the frequencies of the reference signal in accordance with the signal of the direct current component to be outputted, whereby the center frequency of the band-pass filter can be adjusted automatically to the desired set value with simple circuit construction and precision better than in the conventional embodiment.
CA002059580A 1991-01-18 1992-01-17 Auto-tuned apparatus for band-pass filter Expired - Fee Related CA2059580C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP3-4234 1991-01-18
JP423491 1991-01-18
JP3-338425 1991-12-20
JP33842591A JP2727834B2 (en) 1991-01-18 1991-12-20 Automatic setting device for bandpass filters

Publications (2)

Publication Number Publication Date
CA2059580A1 true CA2059580A1 (en) 1993-06-21
CA2059580C CA2059580C (en) 1996-06-11

Family

ID=26337969

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002059580A Expired - Fee Related CA2059580C (en) 1991-01-18 1992-01-17 Auto-tuned apparatus for band-pass filter

Country Status (6)

Country Link
US (1) US5235294A (en)
EP (1) EP0495514B1 (en)
CA (1) CA2059580C (en)
DE (1) DE69214678T2 (en)
DK (1) DK0495514T3 (en)
FI (1) FI105958B (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI87864C (en) * 1991-05-09 1993-02-25 Telenokia Oy ANCHOR OVER FOER FARER REGLERING AV ETT BANDPASSFILTER, SAERSKILT ETT COMBINATOR FILTER
FI91469C (en) * 1992-03-31 1994-06-27 Nokia Telecommunications Oy Method of tuning an RF bandpass filter
FI93064C (en) * 1992-12-30 1995-02-10 Nokia Telecommunications Oy Method and arrangement for controlling a bandpass filter, especially a com- puter filter
US5739731A (en) * 1994-01-18 1998-04-14 Allen Telecom Group, Inc. Self-tuning resonant cavity filter
FI96550C (en) * 1994-06-30 1996-07-10 Nokia Telecommunications Oy The summing network
US5608665A (en) * 1995-10-03 1997-03-04 Wyszynski; Adam S. Self-tuned, continuous-time active filter
FI103227B (en) * 1996-08-29 1999-05-14 Nokia Telecommunications Oy Summing network and tuning base
US6147577A (en) * 1998-01-15 2000-11-14 K&L Microwave, Inc. Tunable ceramic filters
JP3389868B2 (en) * 1998-11-09 2003-03-24 株式会社村田製作所 Automatic characteristic adjustment method of dielectric filter, automatic characteristic adjustment apparatus, and method of manufacturing dielectric filter using the same
US6904101B1 (en) * 2000-02-17 2005-06-07 Lear Corporation Tuneless narrow-band super-regenerative receiver
SE517746C2 (en) * 2000-10-20 2002-07-09 Ericsson Telefon Ab L M Bearing device, Cavity filter and method of mounting thereof
US6822540B2 (en) * 2001-10-26 2004-11-23 Adc Telecommunications, Inc. Tuning a cavity filter based on positional data for tuning members
US7148771B2 (en) * 2004-12-21 2006-12-12 Alcatel Concentric, two stage coarse and fine tuning for ceramic resonators
US20070098118A1 (en) * 2005-11-01 2007-05-03 Khurram Muhammad Method for automatic gain control (AGC) by combining if frequency adjustment with receive path gain adjustment
KR101077570B1 (en) 2009-07-20 2011-10-27 주식회사 에이스테크놀로지 Frequency Tunable Filter Enabling Automatic Control
WO2011150952A1 (en) * 2010-05-31 2011-12-08 Prism Microwave Oy Tuning system of resonator filters
US11201602B1 (en) 2020-09-17 2021-12-14 Analog Devices, Inc. Apparatus and methods for tunable filtering
US11201600B1 (en) 2020-10-05 2021-12-14 Analog Devices, Inc. Apparatus and methods for control and calibration of tunable filters
CN112147740A (en) * 2020-10-22 2020-12-29 重庆邮电大学 Multi-working-frequency-band programmable microwave photonic filter based on integrated silicon waveguide

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426630A (en) * 1981-12-28 1984-01-17 Rockwell International Corporation Electronically tunable band reject filter
US4462009A (en) * 1982-05-25 1984-07-24 Rockwell International Corporation Broadband filter and tuning system
US4726071A (en) * 1984-12-31 1988-02-16 Orion Industries, Inc. Microprocessor controlled self-tuning resonant cavity and method
SU1524115A1 (en) * 1987-07-07 1989-11-23 Ленинградский электротехнический институт им.В.И.Ульянова (Ленина) Device for stabilizing tuning frequency of ferrite member
JPH071841B2 (en) * 1987-10-19 1995-01-11 日本電信電話株式会社 Automatic tuning resonator
FR2661057A1 (en) * 1990-04-12 1991-10-18 Tekelec Airtronic Sa METHOD FOR TUNING AT LEAST ONE VARIABLE FREQUENCY FILTER OF A FILTER ARRANGEMENT ON A NEW SELECTED FREQUENCY AND SYSTEM FOR IMPLEMENTING SAID METHOD

Also Published As

Publication number Publication date
DK0495514T3 (en) 1997-02-17
EP0495514B1 (en) 1996-10-23
CA2059580C (en) 1996-06-11
DE69214678D1 (en) 1996-11-28
FI105958B (en) 2000-10-31
US5235294A (en) 1993-08-10
FI920207A0 (en) 1992-01-17
DE69214678T2 (en) 1997-06-05
EP0495514A3 (en) 1993-02-24
EP0495514A2 (en) 1992-07-22
FI920207A (en) 1992-07-19

Similar Documents

Publication Publication Date Title
CA2059580A1 (en) Auto-Tuned Apparatus for Band-Pass Filter
EP0339819A3 (en) Electronic filter
JPS6449303A (en) Wide band mixer
JPS5744338A (en) Noise reduction device
CA2067562A1 (en) Frequency doubler with a variable delay circuit and exclusive or gate
IE42349L (en) Electrical filters
CA2107632A1 (en) Local Oscillator and Its Frequency Switching Method
CA2115182A1 (en) Narrow-Band Filter Having a Variable Center Frequency
JPH0770919B2 (en) Low noise signal generator
EP0326210A3 (en) Multiplicative sieve signal processing
ES8502593A1 (en) Input circuit arrangement for a television receiver.
CA2052385A1 (en) Variable band-pass filter circuit
EP0571635A4 (en) Device for correcting frequency characteristic of sound field
CA2155432A1 (en) Circuit for removing random fm noise
JPS6464576A (en) Mechanical resonance cancelling system
EP0273100A3 (en) Digital filter circuit
JPS6455970A (en) Noise reducing circuit
GB1537320A (en) Single control power-frequency control circuit
JPS647810A (en) Digital channel divider
JPS5926386Y2 (en) reverberation device
JPS5478053A (en) Filter circuit
JPS6115489B2 (en)
JPS57143936A (en) Frequency synthesizer
JPS5614758A (en) Frequency division system
KR890008429Y1 (en) A surround system

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed