GB2253314A - Dual mode automatic gain control - Google Patents

Dual mode automatic gain control

Info

Publication number
GB2253314A
GB2253314A GB9207830A GB9207830A GB2253314A GB 2253314 A GB2253314 A GB 2253314A GB 9207830 A GB9207830 A GB 9207830A GB 9207830 A GB9207830 A GB 9207830A GB 2253314 A GB2253314 A GB 2253314A
Authority
GB
United Kingdom
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
GB9207830A
Other versions
GB9207830D0 (en
GB2253314B (en
Inventor
Randall W Rich
Rashid M Osmani
Thomas J Walczak
Stephen V 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
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of GB9207830D0 publication Critical patent/GB9207830D0/en
Publication of GB2253314A publication Critical patent/GB2253314A/en
Application granted granted Critical
Publication of GB2253314B publication Critical patent/GB2253314B/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

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

Abstract

A gain control system for controlling signal levels of the signal (94) 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 (158), such as an FM signal, or a non-constant envelope signal (142), 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. <IMAGE>
GB9207830A 1990-08-24 1992-04-09 Dual mode automatic gain control Expired - Fee Related GB2253314B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US57208090A 1990-08-24 1990-08-24
PCT/US1991/005069 WO1992003892A1 (en) 1990-08-24 1991-07-18 Dual mode automatic gain control

Publications (3)

Publication Number Publication Date
GB9207830D0 GB9207830D0 (en) 1992-06-10
GB2253314A true GB2253314A (en) 1992-09-02
GB2253314B GB2253314B (en) 1994-04-20

Family

ID=24286267

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9207830A Expired - Fee Related GB2253314B (en) 1990-08-24 1992-04-09 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2277840A (en) * 1993-05-05 1994-11-09 Nokia Mobile Phones Ltd Controlling gain of amplifier to prevent clipping of digital signal

Families Citing this family (7)

* 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
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

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4355401A (en) * 1979-09-28 1982-10-19 Nippon Electric Co., Ltd. Radio transmitter/receiver for digital and analog communications system
US4521892A (en) * 1981-09-24 1985-06-04 International Standard Electric Corporation Direct conversion radio receiver for FM signals
US4757502A (en) * 1985-01-22 1988-07-12 Alcatel Thomson Faisceaux Hertizens Automatic gain control method and circuit for a time division multiple access receiver
US4829593A (en) * 1986-03-18 1989-05-09 Nec Corporation Automatic gain control apparatus
US4914651A (en) * 1988-09-20 1990-04-03 Cellular Data, Inc. Cellular data system
WO1990006644A1 (en) * 1988-11-30 1990-06-14 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

Family Cites Families (4)

* 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
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

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4355401A (en) * 1979-09-28 1982-10-19 Nippon Electric Co., Ltd. Radio transmitter/receiver for digital and analog communications system
US4521892A (en) * 1981-09-24 1985-06-04 International Standard Electric Corporation Direct conversion radio receiver for FM signals
US4757502A (en) * 1985-01-22 1988-07-12 Alcatel Thomson Faisceaux Hertizens Automatic gain control method and circuit for a time division multiple access receiver
US4829593A (en) * 1986-03-18 1989-05-09 Nec Corporation Automatic gain control apparatus
US4914651A (en) * 1988-09-20 1990-04-03 Cellular Data, Inc. Cellular data system
WO1990006644A1 (en) * 1988-11-30 1990-06-14 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2277840A (en) * 1993-05-05 1994-11-09 Nokia Mobile Phones Ltd Controlling gain of amplifier to prevent clipping of digital signal
GB2277840B (en) * 1993-05-05 1997-05-21 Nokia Mobile Phones Ltd Circuit for handling a speech signal

Also Published As

Publication number Publication date
MX173696B (en) 1994-03-22
MX9100764A (en) 1992-04-01
FR2666709A1 (en) 1992-03-13
JP2797712B2 (en) 1998-09-17
HK25697A (en) 1997-03-06
GB9207830D0 (en) 1992-06-10
AU632707B2 (en) 1993-01-07
JPH05501794A (en) 1993-04-02
CA2066711C (en) 1996-09-03
CA2066711A1 (en) 1992-02-25
DE4191921T (en) 1992-08-27
GB2253314B (en) 1994-04-20
WO1992003892A1 (en) 1992-03-05
AU8307691A (en) 1992-03-17
FR2666709B1 (en) 1995-05-05

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010718