GB2549571A8 - Single signal-variant power supply for a pluarity of amplifiers - Google Patents

Single signal-variant power supply for a pluarity of amplifiers Download PDF

Info

Publication number
GB2549571A8
GB2549571A8 GB1701032.3A GB201701032A GB2549571A8 GB 2549571 A8 GB2549571 A8 GB 2549571A8 GB 201701032 A GB201701032 A GB 201701032A GB 2549571 A8 GB2549571 A8 GB 2549571A8
Authority
GB
United Kingdom
Prior art keywords
amplifiers
power supply
level
signal
control circuit
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Withdrawn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
GB1701032.3A
Other versions
GB2549571A (en
GB201701032D0 (en
Inventor
LaBundy Jeffrey
Chakravarty Anu
Shrishrimal Deepal
Allen May Jeffrey
Asrai Firas
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 International Semiconductor Ltd
Original Assignee
Cirrus Logic International Semiconductor 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
Priority claimed from US15/349,771 external-priority patent/US20170310280A1/en
Application filed by Cirrus Logic International Semiconductor Ltd filed Critical Cirrus Logic International Semiconductor Ltd
Publication of GB201701032D0 publication Critical patent/GB201701032D0/en
Publication of GB2549571A publication Critical patent/GB2549571A/en
Publication of GB2549571A8 publication Critical patent/GB2549571A8/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Withdrawn legal-status Critical Current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
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
    • 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
    • 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
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • 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
    • H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
    • 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
    • H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
    • 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
    • H03F3/2175—Class D power amplifiers; Switching amplifiers using analogue-digital or digital-analogue conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • 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
    • H03F2200/228—A measuring circuit being coupled to the input of an amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/321—Use of a microprocessor in an amplifier circuit or its control circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/462—Indexing scheme relating to amplifiers the current being sensed
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/471—Indexing scheme relating to amplifiers the voltage being sensed
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/504—Indexing scheme relating to amplifiers the supply voltage or current being continuously controlled by a controlling signal, e.g. the controlling signal of a transistor implemented as variable resistor in a supply path for, an IC-block showed amplifier
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/516—Some amplifier stages of an amplifier use supply voltages of different value

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)

Abstract

A single signal-variant power supply 28 controlled by a control circuit 20 provides electrical energy to a plurality of amplifiers 26. A typical application may be in a personal multi-channel audio device where efficient amplification and minimized component count are desirable. The control circuit, having at least one input for receiving a respective signal for each of the amplifiers, monitors the signals and outputs at least one control signal to set the level of the power supply to meet the respective requirements of each of the amplifiers. The supply voltage may be set to the maximum of the minimum power supply levels required by each amplifier. The monitored signal content may include a voltage level, current level or in-band spectral content, and the supply level may be set based on frequency or time-domain analysis, power consumption optimisation or target distortion level. Required signal characteristics may be transmitted using an analogue or digital communications protocol. A method of setting a common power supply level based on respective signals and requirements associated with a plurality of amplifiers is also provided.
GB1701032.3A 2016-04-20 2017-01-20 Single signal-variant power supply for a pluarity of amplifiers Withdrawn GB2549571A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662325231P 2016-04-20 2016-04-20
US15/349,771 US20170310280A1 (en) 2016-04-20 2016-11-11 Single signal-variant power supply for a plurality of amplifiers

Publications (3)

Publication Number Publication Date
GB201701032D0 GB201701032D0 (en) 2017-03-08
GB2549571A GB2549571A (en) 2017-10-25
GB2549571A8 true GB2549571A8 (en) 2017-11-22

Family

ID=59215887

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1701032.3A Withdrawn GB2549571A (en) 2016-04-20 2017-01-20 Single signal-variant power supply for a pluarity of amplifiers

Country Status (1)

Country Link
GB (1) GB2549571A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109391233A (en) * 2017-08-14 2019-02-26 芯籁半导体股份有限公司 A kind of signal processing system and its method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3111776C2 (en) * 1980-03-26 1983-12-22 Hitachi, Ltd., Tokyo Stereo amplifier system
JPS61112409A (en) * 1984-11-07 1986-05-30 Toshiba Corp Power amplifier
GB2275384A (en) * 1993-02-22 1994-08-24 Thomson Consumer Electronics Controlling amplifier power supply in dependence on signal level
US6760604B2 (en) * 2001-01-29 2004-07-06 Motorola, Inc. Portable radio transceiver having shared power source for audio and RF amplifiers
US6535399B2 (en) * 2001-08-14 2003-03-18 Bose Corporation Tracking power supply controlling
US7852150B1 (en) * 2007-12-20 2010-12-14 The Tc Group A/S Switching amplifier driven by a controlled power supply
US8509713B2 (en) * 2009-12-21 2013-08-13 Ubidyne, Inc. Single envelope tracking system for an active antenna array
GB2488380B (en) * 2011-06-24 2018-04-04 Snaptrack Inc Envelope tracking system for mimo

Also Published As

Publication number Publication date
GB2549571A (en) 2017-10-25
GB201701032D0 (en) 2017-03-08

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Legal Events

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