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4QD-TEC: Low distortion Audio amplifier
https://www.4qdtec.com/pwramp.html
Low distortion audio amplifier This is an unusual circuit for an ultra-low distortion power amp. According to my original notes the circuit is dated January 1977 so the circuit is not exactly modern but it is still sufficiently different to be interesting.
A LOW-DISTORTION CLASS-AB AUDIO AMPLIFIER WITH …
http://wordpress.nmsu.edu/pfurth/files/2015/06/Low_Distortion_Audio_Amplifier_Mohan_2011.pdf
tures of audio ampli ers are low power dissipation, high output power and low distortion[1],[2],[5],[6],[7]. The ideal choice for audio ampli ers are class-AB and class-D ampli ers [6]. Though class-D ampli ers have high e ciency, low power dissipation and low distortion [5], class-AB ampli ers are preferred for designing
Ultra low distortion composite amplifier kits TDA7293 TDA794
https://www.kaltecs.com/tda7293-composite-amplifier/
To ensure low distortion and low noise floor U1 needs to be a high performance op amp. Figure 3 shows THD + noise plots vs output power. The PSU is identical to that used with LM1875 composite amplifier but the output voltage is ±33.5V. TDA7293 TDA7294 composite amplifier distortion vs output power
Ultralow Distortion Audio Panpot Amplifier - Analog Devices
https://www.analog.com/en/analog-dialogue/articles/ultralow-distortion-panpot-amplifier.html
The AD8273 1 dual low-distortion difference amplifier uses internal gain setting resistors to ensure excellent matching between the two channels. With no external components, each channel is configured as two high-performance amplifiers with a gain of 3. In the audio frequency range, the total harmonic distortion is less than 0.0007%.
NCS2211: Audio Power Amplifier, Low Distortion, with ...
https://www.onsemi.com/products/signal-conditioning-control/amplifiers-comparators/audio-power-amplifiers/ncs2211
NCS2211: Audio Power Amplifier, Low Distortion, with Differential Output and Shutdown Mode. The NCS2211 is a high performance, low distortion Class A/B audio amplifier. It is capable of delivering 1W of output power into an 8 Ω speaker bridge-tied load (BTL).
Project: Low Distortion Audio Power Amplifier, design and ...
https://pmdelgado.wordpress.com/2014/04/16/project-low-distortion-audio-power-amplifier-design-and-implementation/
This amplifier is to be designed under the premise that only low impedance sources will be used to drive its input. This is due to the fact that an output impedance comparable with that of the input could make the amp’s lower frequency response dependable of an external parameter, since there is a dominant low frequency pole located at that node.
OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, …
https://www.ti.com/lit/ds/symlink/opa1656.pdf
OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational Amplifiers 1 Features • Ultra-low noise: – Voltage noise: 2.9 nV/√Hz at 10 kHz – Current noise: 6 fA/√Hz at 1 kHz • Low distortion: – 0.000029% (–131 dB) at 1 kHz – 0.000035% (–129 dB) at 20 kHz • High open-loop gain: 150 dB • High output current: 100 mA • Low input bias current: 10 pA
Ultra-low Distortion Class-A Amplifier
https://www.sound-au.com/tcaas/nj10w.pdf
Ultra-low Distortion Class-A Amplifier A design using feedback to control the gain and the levels of voltage and current in the output stage By L. Nelson-Jones, M.I.E.R.E. There is in the design to be described nothing very revolutionary, but rather an attempt to get a little nearer to perfection, in the power amplifier section of an audio system.
Ultra Low Distortion Class B Amplifier - diyAudio
https://www.diyaudio.com/archive/blogs/comments/comment2715.html
This is a Class B power amplifier that follows the Ultra-LD Mk.3 amplifier design published by the Australian Silicon Chip magazine in 2011, which in turn draws heavily from the concept of a Blameless amplifier devised by Douglas Self. I used a different power supply and speaker protection, and changed the grounding scheme vs what was published. The distortion …
Ultra Low Distortion Composite Amplifiers Based on TDA7293 ...
https://www.diyaudio.com/community/threads/ultra-low-distortion-composite-amplifiers-based-on-tda7293-94.379506/
Ultra Low Distortion Composite amplifiers based on TDA7293/94 Q: Why do I need a separate +/-15V PSU? A: You need +/-15V power supply for the op amp. It can be anything between +/- 12V to +/-16V. High PSRR (and low noise if possible) is a must.
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