AU2002316851A1 - Methods and apparatus for tuning rf-filters in radio receivers - Google Patents

Methods and apparatus for tuning rf-filters in radio receivers

Info

Publication number
AU2002316851A1
AU2002316851A1 AU2002316851A AU2002316851A AU2002316851A1 AU 2002316851 A1 AU2002316851 A1 AU 2002316851A1 AU 2002316851 A AU2002316851 A AU 2002316851A AU 2002316851 A AU2002316851 A AU 2002316851A AU 2002316851 A1 AU2002316851 A1 AU 2002316851A1
Authority
AU
Australia
Prior art keywords
tuning
filters
methods
radio receivers
receivers
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.)
Abandoned
Application number
AU2002316851A
Inventor
Martin Isberg
Bo Lindell
Bjorn Lindquist
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 US09/836,523 external-priority patent/US20020151287A1/en
Priority claimed from US09/899,339 external-priority patent/US6978125B2/en
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of AU2002316851A1 publication Critical patent/AU2002316851A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/0805—Details of the phase-locked loop the loop being adapted to provide an additional control signal for use outside the loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/06—Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges
    • H03J3/08—Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges by varying a second parameter simultaneously with the tuning, e.g. coupling bandpass filter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range
    • 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
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
AU2002316851A 2001-04-17 2002-04-15 Methods and apparatus for tuning rf-filters in radio receivers Abandoned AU2002316851A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US09/836,523 2001-04-17
US09/836,523 US20020151287A1 (en) 2001-04-17 2001-04-17 Receiver front-end filter tuning
US09/899,339 2001-07-05
US09/899,339 US6978125B2 (en) 2001-07-05 2001-07-05 Methods and apparatus for tuning pre-selection filters in radio receivers
PCT/EP2002/004154 WO2002084870A2 (en) 2001-04-17 2002-04-15 Methods and apparatus for tuning rf-filters in radio receivers

Publications (1)

Publication Number Publication Date
AU2002316851A1 true AU2002316851A1 (en) 2002-10-28

Family

ID=27125877

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2002316851A Abandoned AU2002316851A1 (en) 2001-04-17 2002-04-15 Methods and apparatus for tuning rf-filters in radio receivers

Country Status (3)

Country Link
EP (1) EP1380108A2 (en)
AU (1) AU2002316851A1 (en)
WO (2) WO2002084870A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004062103A1 (en) * 2003-01-07 2004-07-22 Philips Intellectual Property & Standards Gmbh High-frequency receiver circuit having a frequency-selective element
US11387859B2 (en) * 2020-06-29 2022-07-12 Motorola Solutions, Inc. Method and apparatus for mitigating image interference in a receiver
CN112083370B (en) * 2020-08-25 2024-02-09 山东浪潮科学研究院有限公司 Method, equipment and medium for calibrating direct current bias of mixer

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232398A (en) * 1978-02-09 1980-11-04 Motorola, Inc. Radio receiver alignment indicator
US4528698A (en) * 1983-12-22 1985-07-09 Motorola, Inc. Tuning system for RF receiver
US4837852A (en) * 1985-06-17 1989-06-06 Toko, Inc. Electronic tuning circuit for AM receiver which is easy to effect tracking adjustment
US5428829A (en) * 1992-09-28 1995-06-27 Delco Electronics Corporation Method and apparatus for tuning and aligning an FM receiver
US5408196A (en) * 1993-03-29 1995-04-18 U.S. Philips Corporation Tunable device
EP0671073A1 (en) * 1993-09-29 1995-09-13 Kenji Yokoyama Fm threshold expansion detector circuit
SE508290C2 (en) * 1997-01-21 1998-09-21 Ericsson Telefon Ab L M Receiver device for two frequency bands
US6052420A (en) * 1997-05-15 2000-04-18 Northern Telecom Limited Adaptive multiple sub-band common-mode RFI suppression
US6266522B1 (en) * 1998-02-04 2001-07-24 Ericsson Inc. Apparatus and methods for tuning bandpass filters
EP1145430B1 (en) * 1998-11-12 2004-09-15 Broadcom Corporation Integrated tuner architecture
EP1128555A1 (en) * 2000-02-24 2001-08-29 Semiconductor Ideas to The Market (ItoM) BV Receiver

Also Published As

Publication number Publication date
WO2002089326A1 (en) 2002-11-07
WO2002084870A2 (en) 2002-10-24
EP1380108A2 (en) 2004-01-14
WO2002084870A3 (en) 2002-12-12

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase