CA2066711A1 - Dual mode automatic gain control - Google Patents

Dual mode automatic gain control

Info

Publication number
CA2066711A1
CA2066711A1 CA 2066711 CA2066711A CA2066711A1 CA 2066711 A1 CA2066711 A1 CA 2066711A1 CA 2066711 CA2066711 CA 2066711 CA 2066711 A CA2066711 A CA 2066711A CA 2066711 A1 CA2066711 A1 CA 2066711A1
Authority
CA
Canada
Prior art keywords
signal
gain control
automatic gain
dual mode
mode automatic
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
CA 2066711
Other languages
French (fr)
Other versions
CA2066711C (en
Inventor
Randall Wayne Rich
Rashid Masood Osmani
Thomas Joseph Walczak
Stephen Vincent Cahill
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.)
Motorola Solutions Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2066711A1 publication Critical patent/CA2066711A1/en
Application granted granted Critical
Publication of CA2066711C publication Critical patent/CA2066711C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3068—Circuits generating control signals for both R.F. and I.F. stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Noise Elimination (AREA)

Abstract

A gain control system for controlling signal levels of the signal received by a receiver. The gain control system is operable to control the signal levels of the signal when the signal is comprised of either a conventional, constant envelope signal, such as an FM signal, or a non-constant envelope signal, such as a TDMA composite modulated signal. The gain control system may be advantageously embodied in a dual-mode radiotelephone operable to receive both conventional, FM
signals and TDMA, composite modulated signals.
CA 2066711 1990-08-24 1991-07-18 Dual mode automatic gain control Expired - Fee Related CA2066711C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US57208090A 1990-08-24 1990-08-24
US572,080 1990-08-24

Publications (2)

Publication Number Publication Date
CA2066711A1 true CA2066711A1 (en) 1992-02-25
CA2066711C CA2066711C (en) 1996-09-03

Family

ID=24286267

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2066711 Expired - Fee Related CA2066711C (en) 1990-08-24 1991-07-18 Dual mode automatic gain control

Country Status (9)

Country Link
JP (1) JP2797712B2 (en)
AU (1) AU632707B2 (en)
CA (1) CA2066711C (en)
DE (1) DE4191921T (en)
FR (1) FR2666709A1 (en)
GB (1) GB2253314B (en)
HK (1) HK25697A (en)
MX (1) MX173696B (en)
WO (1) WO1992003892A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5509030A (en) * 1992-03-04 1996-04-16 Alcatel Network Systems, Inc. RF receiver AGC incorporating time domain equalizer circuity
US5396653A (en) * 1992-06-05 1995-03-07 Nokia Mobile Phones Ltd. Cellular telephone signalling circuit operable with different cellular telephone systems
FI97001C (en) * 1993-05-05 1996-09-25 Nokia Mobile Phones Ltd Switching to process a speech signal
US5469115A (en) * 1994-04-28 1995-11-21 Qualcomm Incorporated Method and apparatus for automatic gain control in a digital receiver
US5572452A (en) * 1995-02-03 1996-11-05 Telefonaktiebolaget Lm Ericsson Filter with feed-forward AGC
JPH10145250A (en) * 1996-11-12 1998-05-29 Nec Corp Radio receiver
JP4150101B2 (en) 1998-04-10 2008-09-17 富士通株式会社 Wireless receiver
JP4744461B2 (en) * 2007-02-27 2011-08-10 京セラ株式会社 Reception control method and receiving apparatus

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748581A (en) * 1971-12-13 1973-07-24 Zenith Radio Corp Multi-mode detector circuit
DE2555249C2 (en) * 1975-12-09 1983-03-24 Rohde & Schwarz GmbH & Co KG, 8000 München High frequency message receiver
JPS5648732A (en) * 1979-09-28 1981-05-02 Nec Corp Radio equipment
GB2106359B (en) * 1981-09-24 1985-07-03 Standard Telephones Cables Ltd Direct conversion radio receiver for fm signals
DE3146280A1 (en) * 1981-11-21 1983-06-23 AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang Demodulators, the control information of which is obtained from a power detector
GB2166324A (en) * 1984-10-25 1986-04-30 Stc Plc A multi-mode radio transceiver
FR2576472B1 (en) * 1985-01-22 1988-02-12 Alcatel Thomson Faisceaux METHOD AND DEVICE FOR AUTOMATICALLY GAIN CONTROL OF A TIME-DIVISION MULTIPLE ACCESS RECEIVER
JPS62216511A (en) * 1986-03-18 1987-09-24 Nec Corp Automatic gain controller
US4914651A (en) * 1988-09-20 1990-04-03 Cellular Data, Inc. Cellular data system
IE64560B1 (en) * 1988-11-30 1995-08-23 Motorola Inc Digital automatic gain control
US5008953A (en) * 1989-06-26 1991-04-16 Telefonaktiebolaget L M Ericsson Mobile station link supervision utilizing digital voice color codes
US5020076A (en) * 1990-05-21 1991-05-28 Motorola, Inc. Hybrid modulation apparatus

Also Published As

Publication number Publication date
FR2666709B1 (en) 1995-05-05
FR2666709A1 (en) 1992-03-13
GB2253314A (en) 1992-09-02
JPH05501794A (en) 1993-04-02
MX173696B (en) 1994-03-22
DE4191921T (en) 1992-08-27
AU632707B2 (en) 1993-01-07
HK25697A (en) 1997-03-06
JP2797712B2 (en) 1998-09-17
AU8307691A (en) 1992-03-17
CA2066711C (en) 1996-09-03
WO1992003892A1 (en) 1992-03-05
GB9207830D0 (en) 1992-06-10
GB2253314B (en) 1994-04-20
MX9100764A (en) 1992-04-01

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed