GB2534440B - Amplifier with adjustable ramp up/down gain for minimizing or eliminating pop noise - Google Patents

Amplifier with adjustable ramp up/down gain for minimizing or eliminating pop noise

Info

Publication number
GB2534440B
GB2534440B GB1518790.9A GB201518790A GB2534440B GB 2534440 B GB2534440 B GB 2534440B GB 201518790 A GB201518790 A GB 201518790A GB 2534440 B GB2534440 B GB 2534440B
Authority
GB
United Kingdom
Prior art keywords
minimizing
amplifier
pop noise
adjustable ramp
down 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
GB1518790.9A
Other versions
GB201518790D0 (en
GB2534440A (en
Inventor
Zhang Lingli
Wang Huan
Cheng Yongjie
Larsen Christian
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.)
Cirrus Logic Inc
Original Assignee
Cirrus Logic 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
Priority claimed from US14/920,698 external-priority patent/US9673762B2/en
Application filed by Cirrus Logic Inc filed Critical Cirrus Logic Inc
Publication of GB201518790D0 publication Critical patent/GB201518790D0/en
Publication of GB2534440A publication Critical patent/GB2534440A/en
Application granted granted Critical
Publication of GB2534440B publication Critical patent/GB2534440B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
GB1518790.9A 2014-10-24 2015-10-23 Amplifier with adjustable ramp up/down gain for minimizing or eliminating pop noise Active GB2534440B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201462068245P 2014-10-24 2014-10-24
US14/920,698 US9673762B2 (en) 2014-10-24 2015-10-22 Amplifier with adjustable ramp up/down gain for minimizing or eliminating pop noise

Publications (3)

Publication Number Publication Date
GB201518790D0 GB201518790D0 (en) 2015-12-09
GB2534440A GB2534440A (en) 2016-07-27
GB2534440B true GB2534440B (en) 2019-01-09

Family

ID=55130128

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1518790.9A Active GB2534440B (en) 2014-10-24 2015-10-23 Amplifier with adjustable ramp up/down gain for minimizing or eliminating pop noise

Country Status (1)

Country Link
GB (1) GB2534440B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3276825B1 (en) * 2016-07-27 2021-05-26 Nxp B.V. Gain calibration controller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090102550A1 (en) * 2005-06-10 2009-04-23 Rohm Co., Ltd. Audio signal amplifier circuit with a mute function
US20090231030A1 (en) * 2008-03-17 2009-09-17 Po-Yu Li Audio power amplifier and a pre-amplifier thereof
GB2496664A (en) * 2011-11-18 2013-05-22 Wolfson Microelectronics Plc A digital offset-cancelling loop for a class-D amplifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090102550A1 (en) * 2005-06-10 2009-04-23 Rohm Co., Ltd. Audio signal amplifier circuit with a mute function
US20090231030A1 (en) * 2008-03-17 2009-09-17 Po-Yu Li Audio power amplifier and a pre-amplifier thereof
GB2496664A (en) * 2011-11-18 2013-05-22 Wolfson Microelectronics Plc A digital offset-cancelling loop for a class-D amplifier

Also Published As

Publication number Publication date
GB201518790D0 (en) 2015-12-09
GB2534440A (en) 2016-07-27

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