GB201009314D0 - Portable audio device - Google Patents

Portable audio device

Info

Publication number
GB201009314D0
GB201009314D0 GBGB1009314.4A GB201009314A GB201009314D0 GB 201009314 D0 GB201009314 D0 GB 201009314D0 GB 201009314 A GB201009314 A GB 201009314A GB 201009314 D0 GB201009314 D0 GB 201009314D0
Authority
GB
United Kingdom
Prior art keywords
audio device
portable audio
portable
audio
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.)
Withdrawn
Application number
GBGB1009314.4A
Other versions
GB2480850A (en
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.)
JUST AUDIO Ltd
Original Assignee
JUST AUDIO 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 JUST AUDIO Ltd filed Critical JUST AUDIO Ltd
Priority to GB1009314A priority Critical patent/GB2480850A/en
Publication of GB201009314D0 publication Critical patent/GB201009314D0/en
Publication of GB2480850A publication Critical patent/GB2480850A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0244—Stepped control
    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/507—A switch being used for switching on or off a supply or supplying circuit in an IC-block amplifier circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/511—Many discrete supply voltages or currents or voltage levels can be chosen by a control signal in an IC-block amplifier circuit
GB1009314A 2010-06-03 2010-06-03 A battery bypass arrangement for a portable headphone amplifier Withdrawn GB2480850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1009314A GB2480850A (en) 2010-06-03 2010-06-03 A battery bypass arrangement for a portable headphone amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1009314A GB2480850A (en) 2010-06-03 2010-06-03 A battery bypass arrangement for a portable headphone amplifier

Publications (2)

Publication Number Publication Date
GB201009314D0 true GB201009314D0 (en) 2010-07-21
GB2480850A GB2480850A (en) 2011-12-07

Family

ID=42471114

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1009314A Withdrawn GB2480850A (en) 2010-06-03 2010-06-03 A battery bypass arrangement for a portable headphone amplifier

Country Status (1)

Country Link
GB (1) GB2480850A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102543151A (en) * 2011-12-21 2012-07-04 边仿 MP3 player with headphone amplifier card capable of being replaced
US9231543B2 (en) 2014-01-13 2016-01-05 Apple Inc. Audio power amplification with reduced input power supply crest factor
CN106535022B (en) * 2016-12-07 2019-03-22 北京工业大学 A kind of earphone Dolby circuit with power amplifier function with balanced device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03150909A (en) * 1989-11-07 1991-06-27 Matsushita Electric Ind Co Ltd Low frequency amplifier circuit
US5834977A (en) * 1995-10-31 1998-11-10 Sanyo Electric Co., Ltd. Amplifying circuit with power supply switching circuit
JP2006333437A (en) * 2005-03-16 2006-12-07 Taiyo Yuden Co Ltd Digital amplifier and switching power source
US8295532B2 (en) * 2008-01-11 2012-10-23 Broadcom Corporation Method and system for wireless headset instant on capability during battery charging

Also Published As

Publication number Publication date
GB2480850A (en) 2011-12-07

Similar Documents

Publication Publication Date Title
EP2611214A4 (en) Headphone device
EP2635007A4 (en) Portable electronic device
HK1219410A1 (en) Device
PL2546975T3 (en) Sunlight-tracking device
EP2724667A4 (en) Portable device
GB201004106D0 (en) Device
EP2446807A4 (en) Endoscope-holding device
EP2544079A4 (en) Portable terminal device
EP2482561A4 (en) Portable electronic device
HK1173855A1 (en) Multi-beamforming device
EP2642736A4 (en) Combined device
GB201005963D0 (en) Device
GB201020209D0 (en) Device
PL2361855T3 (en) Shelf-serving device
PL2558672T3 (en) Ground-drilling device
GB201015831D0 (en) Device
ZA201301108B (en) Portable alarm device
EP2555192A4 (en) Audio device
TWM390005U (en) Portable electronic device
EP2557623A4 (en) Electricity-generation device
GB201009314D0 (en) Portable audio device
TWM388066U (en) Portable storage device
GB2476327B (en) Audio device
GB201105917D0 (en) Audio effects device
GB201012854D0 (en) Portable audio device

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)