WO2002084870A3 - Methods and apparatus for tuning rf-filters in radio receivers - Google Patents

Methods and apparatus for tuning rf-filters in radio receivers Download PDF

Info

Publication number
WO2002084870A3
WO2002084870A3 PCT/EP2002/004154 EP0204154W WO02084870A3 WO 2002084870 A3 WO2002084870 A3 WO 2002084870A3 EP 0204154 W EP0204154 W EP 0204154W WO 02084870 A3 WO02084870 A3 WO 02084870A3
Authority
WO
WIPO (PCT)
Prior art keywords
tuning
signal
band
pass filter
end circuit
Prior art date
Application number
PCT/EP2002/004154
Other languages
French (fr)
Other versions
WO2002084870A2 (en
Inventor
Martin Isberg
Bjoern Lindquist
Bo Lindell
Original Assignee
Ericsson Telefon Ab L M
Martin Isberg
Bjoern Lindquist
Bo Lindell
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 Ericsson Telefon Ab L M, Martin Isberg, Bjoern Lindquist, Bo Lindell filed Critical Ericsson Telefon Ab L M
Priority to AU2002316851A priority Critical patent/AU2002316851A1/en
Priority to EP02745233A priority patent/EP1380108A2/en
Publication of WO2002084870A2 publication Critical patent/WO2002084870A2/en
Publication of WO2002084870A3 publication Critical patent/WO2002084870A3/en

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

Abstract

A tuning arrangement in a radio receiver includes a front-end circuit having a tunable band-pass filter that is capable of tunably selecting channels within at least one frequency band of an RF signal. A noise source coupled to an input of the tunable band-pass filter introduces a wide-band noise signal into the front-end circuit. A signal detector coupled to an output of the front-end circuit measures at least one signal power associated with a filtered noise signal derived from the wide-band noise signal. A tuning controller, coupled to the tunable band-pass filter by a tuning control signal, adjusts the tuning control signal in response to the at least one measured signal power for tuning the tunable band-pass filter to a desired filter response.
PCT/EP2002/004154 2001-04-17 2002-04-15 Methods and apparatus for tuning rf-filters in radio receivers WO2002084870A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002316851A AU2002316851A1 (en) 2001-04-17 2002-04-15 Methods and apparatus for tuning rf-filters in radio receivers
EP02745233A EP1380108A2 (en) 2001-04-17 2002-04-15 Methods and apparatus for tuning pre-selection filters in radio receivers

Applications Claiming Priority (4)

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

Publications (2)

Publication Number Publication Date
WO2002084870A2 WO2002084870A2 (en) 2002-10-24
WO2002084870A3 true WO2002084870A3 (en) 2002-12-12

Family

ID=27125877

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP2002/004154 WO2002084870A2 (en) 2001-04-17 2002-04-15 Methods and apparatus for tuning rf-filters in radio receivers
PCT/EP2002/004202 WO2002089326A1 (en) 2001-04-17 2002-04-16 Receiver front-end filter tuning

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/004202 WO2002089326A1 (en) 2001-04-17 2002-04-16 Receiver front-end filter tuning

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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003634A1 (en) * 1978-02-09 1979-08-22 Motorola, Inc. Method of aligning a radio receiver and means for indicating the alignment of a radio receiver
EP0618676A1 (en) * 1993-03-29 1994-10-05 Koninklijke Philips Electronics N.V. Tunable device
WO1995009480A1 (en) * 1993-09-29 1995-04-06 Kenji Yokoyama Fm threshold expansion detector circuit
WO1999040679A1 (en) * 1998-02-04 1999-08-12 Ericsson, Inc. Apparatus and methods for tuning bandpass filters
US6052420A (en) * 1997-05-15 2000-04-18 Northern Telecom Limited Adaptive multiple sub-band common-mode RFI suppression
EP1128555A1 (en) * 2000-02-24 2001-08-29 Semiconductor Ideas to The Market (ItoM) BV Receiver

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
SE508290C2 (en) * 1997-01-21 1998-09-21 Ericsson Telefon Ab L M Receiver device for two frequency bands
US6879816B2 (en) * 1998-11-12 2005-04-12 Broadcom Corporation Integrated switchless programmable attenuator and low noise amplifier

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003634A1 (en) * 1978-02-09 1979-08-22 Motorola, Inc. Method of aligning a radio receiver and means for indicating the alignment of a radio receiver
EP0618676A1 (en) * 1993-03-29 1994-10-05 Koninklijke Philips Electronics N.V. Tunable device
WO1995009480A1 (en) * 1993-09-29 1995-04-06 Kenji Yokoyama Fm threshold expansion detector circuit
US6052420A (en) * 1997-05-15 2000-04-18 Northern Telecom Limited Adaptive multiple sub-band common-mode RFI suppression
WO1999040679A1 (en) * 1998-02-04 1999-08-12 Ericsson, Inc. Apparatus and methods for tuning bandpass filters
EP1128555A1 (en) * 2000-02-24 2001-08-29 Semiconductor Ideas to The Market (ItoM) BV Receiver

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KLEIN W ET AL: "TV-TUNER ATA", RADIO FERNSEHEN ELEKTRONIK, VEB VERLAG TECHNIK. BERLIN, DE, vol. 44, no. 2, 1 February 1995 (1995-02-01), pages 26 - 27, XP000494292, ISSN: 1436-1574 *

Also Published As

Publication number Publication date
AU2002316851A1 (en) 2002-10-28
EP1380108A2 (en) 2004-01-14
WO2002089326A1 (en) 2002-11-07
WO2002084870A2 (en) 2002-10-24

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