CA2249460A1 - Conversion of a pcm signal into a upwm signal - Google Patents

Conversion of a pcm signal into a upwm signal

Info

Publication number
CA2249460A1
CA2249460A1 CA002249460A CA2249460A CA2249460A1 CA 2249460 A1 CA2249460 A1 CA 2249460A1 CA 002249460 A CA002249460 A CA 002249460A CA 2249460 A CA2249460 A CA 2249460A CA 2249460 A1 CA2249460 A1 CA 2249460A1
Authority
CA
Canada
Prior art keywords
model
signal
conversion
linearity
pcm
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.)
Granted
Application number
CA002249460A
Other languages
French (fr)
Other versions
CA2249460C (en
Inventor
Lars Risbo
Hans K. Andersen
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.)
Texas Instruments Denmark AS
Original Assignee
Lars Risbo
Hans K. Andersen
Toccata Technology Aps
Texas Instruments, Copenhagen Aps
Texas Instruments Denmark A/S
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 Lars Risbo, Hans K. Andersen, Toccata Technology Aps, Texas Instruments, Copenhagen Aps, Texas Instruments Denmark A/S filed Critical Lars Risbo
Publication of CA2249460A1 publication Critical patent/CA2249460A1/en
Application granted granted Critical
Publication of CA2249460C publication Critical patent/CA2249460C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M5/00—Conversion of the form of the representation of individual digits
    • H03M5/02—Conversion to or from representation by pulses
    • H03M5/04—Conversion to or from representation by pulses the pulses having two levels
    • H03M5/06—Code representation, e.g. transition, for a given bit cell depending only on the information in that bit cell
    • H03M5/08—Code representation by pulse width

Abstract

To correct non-linearity and noise in the conversion of a pulse code modulated signal (PCM) into a uniform pulse width modulated signal (UPWM), a model is made of the known non-linearity in the conversion by dividing a plurality of non-linearity components in the model, where the polynomial components are separately weighted with filter coefficients. The model is used as a basis for the construction of a filter of the Hammerstein type whose non-linear parts consist of a division of the PCM signal into a plurality of powers, and whose linear parts are approximated by means of the model made. With the circuit of the invention it is now possible to construct a purely digital amplifier which has a great efficiency, low weight, etc.
CA002249460A 1996-03-28 1997-03-26 Conversion of a pcm signal into a upwm signal Expired - Fee Related CA2249460C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK0355/96 1996-03-28
DK35596 1996-03-28
PCT/DK1997/000133 WO1997037433A1 (en) 1996-03-28 1997-03-26 Conversion of a pcm signal into a upwm signal

Publications (2)

Publication Number Publication Date
CA2249460A1 true CA2249460A1 (en) 1997-10-09
CA2249460C CA2249460C (en) 2006-11-28

Family

ID=8092592

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002249460A Expired - Fee Related CA2249460C (en) 1996-03-28 1997-03-26 Conversion of a pcm signal into a upwm signal

Country Status (12)

Country Link
US (1) US6657566B1 (en)
EP (1) EP0890221B1 (en)
JP (1) JP4097700B2 (en)
CN (1) CN1237721C (en)
AT (1) ATE366483T1 (en)
AU (1) AU721526B2 (en)
CA (1) CA2249460C (en)
DE (1) DE69737882T2 (en)
DK (1) DK0890221T3 (en)
EA (1) EA002110B1 (en)
HK (1) HK1020639A1 (en)
WO (1) WO1997037433A1 (en)

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ATE279811T1 (en) 1997-04-02 2004-10-15 Olufsen Powerhouse A S Bang PULSE REFERRED CONTROL METHOD FOR IMPROVED POWER AMPLIFICATION OF A PULSE MODULATED SIGNAL
US6215354B1 (en) * 1998-03-06 2001-04-10 Fujant, Inc. Closed loop calibration for an amplitude reconstruction amplifier
GR980100264A (en) * 1998-07-08 2000-03-31 System for transforming and correcting digital sound signals
DE60007087T2 (en) * 1999-02-23 2005-07-07 Audiologic, Inc., Boulder METHOD AND DEVICE FOR CORRECTING DELTA-SIGMA HIGH-ORDER TRACKERS
US6473457B1 (en) 1999-05-07 2002-10-29 Motorola, Inc. Method and apparatus for producing a pulse width modulated signal
US20020060605A1 (en) * 2000-09-22 2002-05-23 Kowkutla Venkateswar R. Amplifiers
DE10155426A1 (en) 2001-11-12 2003-05-28 Infineon Technologies Ag Digital / analog converter circuit with a device for compensating for non-linear distortions
DE10218513B4 (en) * 2002-04-25 2008-08-21 Qimonda Ag Circuit arrangement and method for transmitting digital signals
SE0300780D0 (en) * 2003-03-24 2003-03-24 Bang & Olufsen Icepower As Digital pulse width controlled oscillation modulator
EP1498803A3 (en) * 2003-07-14 2007-04-04 Micronas GmbH Method and circuit for effective conversion of PCM into PWM data
DE10337782B4 (en) * 2003-07-14 2007-03-01 Micronas Gmbh Method and circuit for effective conversion of PCM to PWM data
JP4561459B2 (en) * 2004-04-30 2010-10-13 ヤマハ株式会社 Class D amplifier
US7161515B2 (en) * 2004-11-04 2007-01-09 Tektronix, Inc. Calibration system and method for a linearity corrector using filter products
GB2425668B (en) * 2005-01-17 2009-02-25 Wolfson Microelectronics Plc Pulse width modulator quantisation circuit
FR2887091B1 (en) * 2005-06-08 2007-08-31 Dolphin Integration Sa DIGITAL-ANALOG CONVERTER
US7327296B1 (en) 2006-03-03 2008-02-05 Cirrus Logic, Inc. Signal processing system with modified delta sigma modulator quantizer output signals to spread harmonic frequencies of pulse width modulator output signals
US7209064B1 (en) 2006-03-03 2007-04-24 Cirrus Logic, Inc. Signal processing system with spreading of a spectrum of harmonic frequencies of a pulse width modulator output signal
US7598714B2 (en) * 2006-07-12 2009-10-06 Harman International Industries, Incorporated Amplifier employing interleaved signals for PWM ripple suppression
US7626519B2 (en) * 2007-05-30 2009-12-01 Texas Instruments Incorporated Pulse-width modulation of pulse-code modulated signals at selectable or dynamically varying sample rates
US8098948B1 (en) 2007-12-21 2012-01-17 Zoran Corporation Method, apparatus, and system for reducing blurring in an image
US7800437B2 (en) * 2008-05-21 2010-09-21 Silicon Laboratories Inc. Closed loop timing feedback for PWM switching amplifiers using predictive feedback compensation
WO2010114521A1 (en) * 2009-03-31 2010-10-07 Agere Systems Inc. Methods and apparatus for direct synthesis of rf signals using delta-sigma modulator
EP2290812B1 (en) * 2009-08-11 2015-06-10 Dialog Semiconductor GmbH Concept, method and apparatus of improved distortion switched-mode amplifier
IT1397119B1 (en) * 2009-12-24 2012-12-28 Elbi Int Spa FLOW MEASUREMENT DEVICE FOR FLUIDS, IN PARTICULAR FOR LIQUIDS.
US8620631B2 (en) 2011-04-11 2013-12-31 King Fahd University Of Petroleum And Minerals Method of identifying Hammerstein models with known nonlinearity structures using particle swarm optimization
DK2575252T3 (en) * 2011-09-29 2018-10-08 Daihen Corp Signal processor, filter, power converter for power converter circuit, connection inverter system and PWM inverter system
CN103036529B (en) * 2011-09-29 2017-07-07 株式会社大亨 Signal processing apparatus, wave filter, control circuit, inverter and converter system
DE102012216677B3 (en) * 2012-09-18 2013-06-13 Siemens Aktiengesellschaft Identification circuit for creating unique identification pattern for integrated circuit, has circuitry ring whose switching stages are selected from respective unstable states in response to challenge word selected signal delays
US9231606B2 (en) 2013-08-20 2016-01-05 Skyworks Solutions, Inc. Dither-less error feedback fractional-N frequency synthesizer systems and methods
US9209791B2 (en) 2013-09-06 2015-12-08 Texas Instruments Incorporated Circuits and methods for cancelling nonlinear distortions in pulse width modulated sequences
CN104601239B (en) * 2015-01-12 2017-05-17 西南交通大学 Optical fiber adaptive nonlinear compensation method based on intensity noise variance and low-pass filter
US9425817B1 (en) 2015-11-19 2016-08-23 Cirrus Logic International Semiconductor Ltd. High order correction for pulse width modulation (PWM) digital/analog converters with reduced computation
ITUB20160679A1 (en) * 2016-02-11 2017-08-11 Milano Politecnico Modulator in width of analog signals with closed loop configuration
CN110190850B (en) * 2019-04-16 2021-04-20 西安电子科技大学 Successive approximation type analog-to-digital converter
US11451329B2 (en) * 2021-01-25 2022-09-20 Huawei Technologies Co., Ltd. Method and apparatus of low-complexity pattern dependent lookup table pre-compensation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02214224A (en) * 1989-02-14 1990-08-27 Sony Corp Digital/analog converter
DE3916482A1 (en) 1989-05-20 1990-11-22 Thomson Brandt Gmbh PCM signal conversion into pulse width modulated signals - supplying bit-reduced data words to presettable counter data inputs
JPH07109991B2 (en) 1989-06-05 1995-11-22 日本ビクター株式会社 Noise shaping type requantization circuit
US5247600A (en) * 1990-01-03 1993-09-21 Williams Charles M Fiber optic data/graphic display screen
GB9027503D0 (en) 1990-12-19 1991-02-06 Sandler Mark B Improvements in or relating to digital to analogue conversion
GB9103777D0 (en) 1991-02-22 1991-04-10 B & W Loudspeakers Analogue and digital convertors
GB9318238D0 (en) 1993-09-02 1993-10-20 B & W Loudspeakers Digital converter
DE69726592T2 (en) 1996-10-31 2004-11-11 Bang & Olufsen A/S PULSE MODULATED POWER AMPLIFIER WITH IMPROVED CASCADED CONTROL METHOD
US6014055A (en) * 1998-02-06 2000-01-11 Intersil Corporation Class D amplifier with reduced clock requirement and related methods

Also Published As

Publication number Publication date
DE69737882T2 (en) 2008-03-13
US6657566B1 (en) 2003-12-02
WO1997037433A1 (en) 1997-10-09
JP4097700B2 (en) 2008-06-11
CA2249460C (en) 2006-11-28
ATE366483T1 (en) 2007-07-15
EA199800870A1 (en) 1999-06-24
AU721526B2 (en) 2000-07-06
HK1020639A1 (en) 2000-05-12
EA002110B1 (en) 2001-12-24
DK0890221T3 (en) 2007-10-08
CN1214814A (en) 1999-04-21
AU2567297A (en) 1997-10-22
CN1237721C (en) 2006-01-18
EP0890221A1 (en) 1999-01-13
DE69737882D1 (en) 2007-08-16
EP0890221B1 (en) 2007-07-04
JP2000507759A (en) 2000-06-20

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Legal Events

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EEER Examination request
MKLA Lapsed

Effective date: 20150326