AU2002214130A1 - Signal level control - Google Patents

Signal level control

Info

Publication number
AU2002214130A1
AU2002214130A1 AU2002214130A AU1413002A AU2002214130A1 AU 2002214130 A1 AU2002214130 A1 AU 2002214130A1 AU 2002214130 A AU2002214130 A AU 2002214130A AU 1413002 A AU1413002 A AU 1413002A AU 2002214130 A1 AU2002214130 A1 AU 2002214130A1
Authority
AU
Australia
Prior art keywords
signal level
level control
logarithm
pair
amplitude
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
AU2002214130A
Inventor
Jonathan Lucas
Andy Thurston
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.)
Aeroflex Cambridge Ltd
Original Assignee
Ubinetics 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
Application filed by Ubinetics Ltd filed Critical Ubinetics Ltd
Publication of AU2002214130A1 publication Critical patent/AU2002214130A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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
    • H03G3/3078—Circuits generating control signals for digitally modulated signals

Abstract

An automatic gain control system wherein the logarithm of the gain on an amplifier (14, FIG. 1) is increased if the amplitude of the amplified signal S2 falls below the lower threshold L2 of a pair of thresholds, and wherein the logarithm of the is decreased if the amplitude exceeds the upper threshold L1 of the pair.
AU2002214130A 2000-11-28 2001-11-01 Signal level control Abandoned AU2002214130A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0029006.4 2000-11-28
GB0029006A GB2369504A (en) 2000-11-28 2000-11-28 Gain control in a receiver using a parameter to determine if gain should be adjusted in order to bring a signal amplitude within a defined range
PCT/GB2001/004854 WO2002045259A2 (en) 2000-11-28 2001-11-01 Signal level control

Publications (1)

Publication Number Publication Date
AU2002214130A1 true AU2002214130A1 (en) 2002-06-11

Family

ID=9904033

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2002214130A Abandoned AU2002214130A1 (en) 2000-11-28 2001-11-01 Signal level control

Country Status (14)

Country Link
US (1) US20040033790A1 (en)
EP (1) EP1338088B1 (en)
JP (1) JP2004515148A (en)
KR (1) KR20030063396A (en)
CN (1) CN1481610A (en)
AT (1) ATE265758T1 (en)
AU (1) AU2002214130A1 (en)
DE (1) DE60103087T2 (en)
DK (1) DK1338088T3 (en)
ES (1) ES2218461T3 (en)
GB (1) GB2369504A (en)
PT (1) PT1338088E (en)
TR (1) TR200401364T4 (en)
WO (1) WO2002045259A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050078775A1 (en) * 2002-09-23 2005-04-14 Martin Hellmark Mitigating the impact of phase steps
US9191905B2 (en) * 2011-06-22 2015-11-17 Broadcom Corporation Method, apparatus and computer readable medium for setting a radio frequency gain
GB2492123B (en) * 2011-06-22 2013-06-12 Renesas Mobile Corp Method, apparatus and computer program for setting a radio frequency gain
CN105013055A (en) * 2015-08-27 2015-11-04 侯梦斌 Fresh garlic flavor generation equipment and use method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4459475A (en) * 1982-03-29 1984-07-10 Bell & Howell Company Automatic calibration for D.C. transducers
GB2166014B (en) * 1984-10-24 1988-10-26 Gen Electric Co Plc Automatic gain control
KR900001507B1 (en) * 1987-03-02 1990-03-12 삼성반도체통신 주식회사 Automatic gain control system
EP0413311A3 (en) * 1989-08-16 1991-10-30 Hitachi, Ltd. A radio receiver and a radio receiver using a direct conversion
US5161170A (en) * 1990-01-16 1992-11-03 The Johns Hopkins University Discrete automatic gain control with high stability, high speed and low distortion
US5631968A (en) * 1995-06-06 1997-05-20 Analog Devices, Inc. Signal conditioning circuit for compressing audio signals
US5734974A (en) * 1996-03-27 1998-03-31 Motorola, Inc. Selective call receivers with stepwise variable gain control
US5852772A (en) * 1997-02-25 1998-12-22 Ericsson Inc. Receiver IF system with active filters
GB9828041D0 (en) * 1998-12-18 1999-02-17 Nokia Telecommunications Oy A device and method for controlling the amplitude of signals

Also Published As

Publication number Publication date
WO2002045259A2 (en) 2002-06-06
JP2004515148A (en) 2004-05-20
GB2369504A (en) 2002-05-29
CN1481610A (en) 2004-03-10
WO2002045259A3 (en) 2003-01-16
DE60103087D1 (en) 2004-06-03
KR20030063396A (en) 2003-07-28
GB0029006D0 (en) 2001-01-10
DE60103087T2 (en) 2004-11-18
DK1338088T3 (en) 2004-07-26
US20040033790A1 (en) 2004-02-19
PT1338088E (en) 2004-08-31
ES2218461T3 (en) 2004-11-16
EP1338088B1 (en) 2004-04-28
TR200401364T4 (en) 2004-07-21
ATE265758T1 (en) 2004-05-15
EP1338088A2 (en) 2003-08-27

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