WO2016110809A3 - Digital audio amplification system - Google Patents

Digital audio amplification system Download PDF

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Publication number
WO2016110809A3
WO2016110809A3 PCT/IB2016/050050 IB2016050050W WO2016110809A3 WO 2016110809 A3 WO2016110809 A3 WO 2016110809A3 IB 2016050050 W IB2016050050 W IB 2016050050W WO 2016110809 A3 WO2016110809 A3 WO 2016110809A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
input signal
audio amplification
pdm
low
Prior art date
Application number
PCT/IB2016/050050
Other languages
French (fr)
Other versions
WO2016110809A2 (en
Inventor
Andrus Aaslaid
Original Assignee
VASSILKOV, Alfred
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 VASSILKOV, Alfred filed Critical VASSILKOV, Alfred
Publication of WO2016110809A2 publication Critical patent/WO2016110809A2/en
Publication of WO2016110809A3 publication Critical patent/WO2016110809A3/en

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Classifications

    • 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
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low frequency amplifiers, e.g. audio preamplifiers

Abstract

The digital audio amplification system described herein uses a pulse density modulation (PDM) encoded 1-bit digital audio signal as the input signal, which is, for example, encoded based on the DSD (Direct Stream Digital) standard or another analogue method, and reproduces it for an acoustic system in an analogue shape, using low-pass filtering, voltage and/or current amplification of digital signals, and, if necessary, conversion of the frequency and/or specification of the time offset of the input signal. The audio amplification system includes a DSD/PDM signal receiving system and a circuit for correcting the time offset of that signal, which can also work as a frequency converter. The achieved PDM signal is directed to a switching circuit, which copies the shape of the input signal with a bigger output current and a voltage amplitude selected by the user. The signal exiting the switch is suitable as an input signal for acoustic systems (speaker, headphones) after low-pass filtering, and the mechanical or electrical parts of the acoustic system itself can serve as low-pass filters. The audio amplification system may be an autonomous component or form an integrated whole with an acoustic system (speaker).
PCT/IB2016/050050 2015-01-06 2016-01-06 Digital audio amplifying system WO2016110809A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EEU201500001 2015-01-06
EEU201500001 2015-01-06

Publications (2)

Publication Number Publication Date
WO2016110809A2 WO2016110809A2 (en) 2016-07-14
WO2016110809A3 true WO2016110809A3 (en) 2016-09-01

Family

ID=56356553

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2016/050050 WO2016110809A2 (en) 2015-01-06 2016-01-06 Digital audio amplifying system

Country Status (1)

Country Link
WO (1) WO2016110809A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114598969A (en) * 2022-03-09 2022-06-07 地球山(苏州)微电子科技有限公司 Digital loudspeaker volume control method, device, equipment and medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7061415B2 (en) * 2003-12-05 2006-06-13 Wolfson Microelectronics Plc Word length reduction circuit
US7479829B2 (en) * 2005-10-31 2009-01-20 Sharp Kabushiki Kaisha Class D amplifier and infrared data receiving apparatus using the same
US20110148677A1 (en) * 2008-06-16 2011-06-23 Universite De Provence Aix-Marseille I D-class digital amplifier configured for shaping non-idealities of an output signal
US20120237060A1 (en) * 2011-03-14 2012-09-20 Samsung Electronics Co., Ltd. Method and apparatus for outputting audio signal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7061415B2 (en) * 2003-12-05 2006-06-13 Wolfson Microelectronics Plc Word length reduction circuit
US7479829B2 (en) * 2005-10-31 2009-01-20 Sharp Kabushiki Kaisha Class D amplifier and infrared data receiving apparatus using the same
US20110148677A1 (en) * 2008-06-16 2011-06-23 Universite De Provence Aix-Marseille I D-class digital amplifier configured for shaping non-idealities of an output signal
US20120237060A1 (en) * 2011-03-14 2012-09-20 Samsung Electronics Co., Ltd. Method and apparatus for outputting audio signal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HAWKSFORD MALCOLM J ET AL: "Digital Audio Power Amplifier for DSD Data Streams", AES CONVENTION 117; OCTOBER 2004, AES, 60 EAST 42ND STREET, ROOM 2520 NEW YORK 10165-2520, USA, 1 October 2004 (2004-10-01), XP040507052 *

Also Published As

Publication number Publication date
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