WO2016110809A3 - Digital audio amplification system - Google Patents
Digital audio amplification system Download PDFInfo
- 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
Links
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).
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)
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)
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 |
-
2016
- 2016-01-06 WO PCT/IB2016/050050 patent/WO2016110809A2/en active Application Filing
Patent Citations (4)
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)
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 |
---|---|
WO2016110809A2 (en) | 2016-07-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2019531612A5 (en) | ||
GB2592171A8 (en) | Systems and methods for reduction of audio artifacts in an audio system with dynamic range enhancement | |
WO2017058617A3 (en) | Circuit topologies for combined generator | |
FI3172581T3 (en) | Circuit architecture for mode switch | |
JP2019504540A5 (en) | ||
WO2009136198A3 (en) | Capacitive transducer circuit and method | |
ATE469466T1 (en) | METHOD AND DEVICE FOR DIRECT CURRENT OFFSET ELIMINATION | |
WO2004107563A3 (en) | High-efficiency amplifier, converter and methods | |
JP2013541305A5 (en) | ||
GB2542523A (en) | Transmission signal shaping systems and methods | |
WO2011119632A3 (en) | Discrete time operational transconductance amplifier for switched capacitor circuits | |
WO2016130360A8 (en) | Circuits for and methods of filtering inter-symbol interference for serdes applications | |
MX2017001242A (en) | Apparatus and method for processing an audio signal using a harmonic post-filter. | |
WO2007035358A3 (en) | Amplifier system employing analog polynomial predistortion with sub-nyquist digital adaptation | |
WO2008090712A1 (en) | Power amplifier | |
EP1965554A3 (en) | Method and system for a digital polar transmitter | |
TW200618464A (en) | Low noise audio amplifier | |
WO2015189150A3 (en) | Feedback delay reduction in force feedback devices | |
GB2568193A (en) | Tunable tunnel diode-based digitized noise source | |
WO2017160520A3 (en) | Removal of switching discontinuity in a hybrid switched mode amplifier | |
Sudharsan | Synthesis of FIR filter using ADC-DAC: a FPGA implementation | |
US9287839B1 (en) | Feedback loop for direct current (DC) offset removal | |
WO2016110809A3 (en) | Digital audio amplification system | |
GB2575397A (en) | Fully-differential current digital-to-analog converter | |
WO2020081181A3 (en) | Single-ended to differential signal conversion of analog signals |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16705292 Country of ref document: EP Kind code of ref document: A2 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16705292 Country of ref document: EP Kind code of ref document: A2 |