GB2577839B - Dynamic gain controller - Google Patents

Dynamic gain controller Download PDF

Info

Publication number
GB2577839B
GB2577839B GB2000016.2A GB202000016A GB2577839B GB 2577839 B GB2577839 B GB 2577839B GB 202000016 A GB202000016 A GB 202000016A GB 2577839 B GB2577839 B GB 2577839B
Authority
GB
United Kingdom
Prior art keywords
gain controller
dynamic gain
dynamic
controller
gain
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.)
Active
Application number
GB2000016.2A
Other versions
GB202000016D0 (en
GB2577839A (en
Inventor
Kumar Mani Senthil
Manikya Prasad Puram Bala
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.)
Imagination Technologies Ltd
Original Assignee
Imagination Technologies 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 Imagination Technologies Ltd filed Critical Imagination Technologies Ltd
Priority to GB2007459.7A priority Critical patent/GB2581106B/en
Priority to GB2000016.2A priority patent/GB2577839B/en
Priority claimed from GB1815351.0A external-priority patent/GB2566164B/en
Publication of GB202000016D0 publication Critical patent/GB202000016D0/en
Publication of GB2577839A publication Critical patent/GB2577839A/en
Application granted granted Critical
Publication of GB2577839B publication Critical patent/GB2577839B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • 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
    • H03G3/3089—Control of digital or coded signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging
    • H03M1/181—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedback mode, i.e. by determining the range to be selected from one or more previous digital output values
    • H03M1/183—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedback mode, i.e. by determining the range to be selected from one or more previous digital output values the feedback signal controlling the gain of an amplifier or attenuator preceding the analogue/digital converter
    • H03M1/185—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedback mode, i.e. by determining the range to be selected from one or more previous digital output values the feedback signal controlling the gain of an amplifier or attenuator preceding the analogue/digital converter the determination of the range being based on more than one digital output value, e.g. on a running average, a power estimation or the rate of change
GB2000016.2A 2016-02-19 2016-02-19 Dynamic gain controller Active GB2577839B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2007459.7A GB2581106B (en) 2016-02-19 2016-02-19 Dynamic gain controller
GB2000016.2A GB2577839B (en) 2016-02-19 2016-02-19 Dynamic gain controller

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1815351.0A GB2566164B (en) 2016-02-19 2016-02-19 Dynamic gain controller
GB2000016.2A GB2577839B (en) 2016-02-19 2016-02-19 Dynamic gain controller

Publications (3)

Publication Number Publication Date
GB202000016D0 GB202000016D0 (en) 2020-02-19
GB2577839A GB2577839A (en) 2020-04-08
GB2577839B true GB2577839B (en) 2020-08-26

Family

ID=69527995

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2000016.2A Active GB2577839B (en) 2016-02-19 2016-02-19 Dynamic gain controller

Country Status (1)

Country Link
GB (1) GB2577839B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020202448A (en) * 2019-06-07 2020-12-17 ヤマハ株式会社 Acoustic device and acoustic processing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5838269A (en) * 1996-09-12 1998-11-17 Advanced Micro Devices, Inc. System and method for performing automatic gain control with gain scheduling and adjustment at zero crossings for reducing distortion
US20150263686A1 (en) * 2012-10-19 2015-09-17 Wolfson Microelectronics Plc Digital/analogue conversion

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5838269A (en) * 1996-09-12 1998-11-17 Advanced Micro Devices, Inc. System and method for performing automatic gain control with gain scheduling and adjustment at zero crossings for reducing distortion
US20150263686A1 (en) * 2012-10-19 2015-09-17 Wolfson Microelectronics Plc Digital/analogue conversion

Also Published As

Publication number Publication date
GB202000016D0 (en) 2020-02-19
GB2577839A (en) 2020-04-08

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