DE69132752T2 - Verbesserter schaltverstärker - Google Patents

Verbesserter schaltverstärker

Info

Publication number
DE69132752T2
DE69132752T2 DE69132752T DE69132752T DE69132752T2 DE 69132752 T2 DE69132752 T2 DE 69132752T2 DE 69132752 T DE69132752 T DE 69132752T DE 69132752 T DE69132752 T DE 69132752T DE 69132752 T2 DE69132752 T2 DE 69132752T2
Authority
DE
Germany
Prior art keywords
switching amplifier
improved switching
improved
amplifier
switching
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.)
Expired - Fee Related
Application number
DE69132752T
Other languages
English (en)
Other versions
DE69132752D1 (de
Inventor
R Howatt
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.)
Apogee Technology Inc
Original Assignee
Apogee Technology 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
Application filed by Apogee Technology Inc filed Critical Apogee Technology Inc
Publication of DE69132752D1 publication Critical patent/DE69132752D1/de
Application granted granted Critical
Publication of DE69132752T2 publication Critical patent/DE69132752T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H03F1/02—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
    • H03F1/0277—Selecting one or more amplifiers from a plurality of 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
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/432—Two or more amplifiers of different type are coupled in parallel at the input or output, e.g. a class D and a linear amplifier, a class B and a class A amplifier
DE69132752T 1990-12-26 1991-11-08 Verbesserter schaltverstärker Expired - Fee Related DE69132752T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/633,762 US5077539A (en) 1990-12-26 1990-12-26 Switching amplifier
PCT/US1991/008377 WO1992012572A1 (en) 1990-12-26 1991-11-08 Improved switching amplifier

Publications (2)

Publication Number Publication Date
DE69132752D1 DE69132752D1 (de) 2001-11-08
DE69132752T2 true DE69132752T2 (de) 2002-08-08

Family

ID=24541037

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69132752T Expired - Fee Related DE69132752T2 (de) 1990-12-26 1991-11-08 Verbesserter schaltverstärker

Country Status (6)

Country Link
US (1) US5077539A (de)
EP (1) EP0564490B1 (de)
JP (1) JPH06504658A (de)
CA (1) CA2099260C (de)
DE (1) DE69132752T2 (de)
WO (1) WO1992012572A1 (de)

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CN101562428B (zh) * 2008-04-16 2011-06-15 瑞铭科技股份有限公司 信号调变装置及其控制方法
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EP2715867A4 (de) 2011-06-02 2014-12-17 Parkervision Inc Antennensteuerung
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US9831843B1 (en) 2013-09-05 2017-11-28 Cirrus Logic, Inc. Opportunistic playback state changes for audio devices
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EP3103194B1 (de) 2014-02-04 2018-11-28 Cirrus Logic, Inc. Schaltverstärker
US10284217B1 (en) 2014-03-05 2019-05-07 Cirrus Logic, Inc. Multi-path analog front end and analog-to-digital converter for a signal processing system
US9774342B1 (en) 2014-03-05 2017-09-26 Cirrus Logic, Inc. Multi-path analog front end and analog-to-digital converter for a signal processing system
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US10785568B2 (en) 2014-06-26 2020-09-22 Cirrus Logic, Inc. Reducing audio artifacts in a system for enhancing dynamic range of audio signal path
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US9596537B2 (en) 2014-09-11 2017-03-14 Cirrus Logic, Inc. Systems and methods for reduction of audio artifacts in an audio system with dynamic range enhancement
US9503027B2 (en) 2014-10-27 2016-11-22 Cirrus Logic, Inc. Systems and methods for dynamic range enhancement using an open-loop modulator in parallel with a closed-loop modulator
GB2533994B (en) * 2014-10-29 2019-01-23 Cirrus Logic Inc Power stage with switched mode amplifier and linear amplifier
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TWI584579B (zh) * 2015-04-24 2017-05-21 晶豪科技股份有限公司 音頻放大器之調變選擇電路及其方法
CN106301257B (zh) * 2015-05-12 2019-05-24 晶豪科技股份有限公司 音频放大器的调制选择电路及其方法
US9959856B2 (en) 2015-06-15 2018-05-01 Cirrus Logic, Inc. Systems and methods for reducing artifacts and improving performance of a multi-path analog-to-digital converter
US9940303B2 (en) 2015-07-10 2018-04-10 Tempo Semiconductor, Inc. Method and apparatus for decimation in frequency FFT butterfly
US9955254B2 (en) 2015-11-25 2018-04-24 Cirrus Logic, Inc. Systems and methods for preventing distortion due to supply-based modulation index changes in an audio playback system
US9543975B1 (en) 2015-12-29 2017-01-10 Cirrus Logic, Inc. Multi-path analog front end and analog-to-digital converter for a signal processing system with low-pass filter between paths
US9660588B1 (en) * 2016-01-04 2017-05-23 Elite Semiconductor Memory Technology Inc. Quaternary/ternary modulation selecting circuit and associated method
US9880802B2 (en) 2016-01-21 2018-01-30 Cirrus Logic, Inc. Systems and methods for reducing audio artifacts from switching between paths of a multi-path signal processing system
US9998826B2 (en) 2016-06-28 2018-06-12 Cirrus Logic, Inc. Optimization of performance and power in audio system
US10545561B2 (en) 2016-08-10 2020-01-28 Cirrus Logic, Inc. Multi-path digitation based on input signal fidelity and output requirements
US10263630B2 (en) 2016-08-11 2019-04-16 Cirrus Logic, Inc. Multi-path analog front end with adaptive path
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Also Published As

Publication number Publication date
EP0564490A1 (de) 1993-10-13
WO1992012572A1 (en) 1992-07-23
CA2099260C (en) 2001-09-18
US5077539A (en) 1991-12-31
CA2099260A1 (en) 1992-06-27
EP0564490B1 (de) 2001-10-04
DE69132752D1 (de) 2001-11-08
JPH06504658A (ja) 1994-05-26
EP0564490A4 (en) 1996-12-18

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8380 Miscellaneous part iii

Free format text: ALS VERTRETER SIND NACHZUTRAGEN: PATENT- UND RECHTSANWAELTE KRAUS & WEISERT, 80539 MUENCHEN

8339 Ceased/non-payment of the annual fee