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Constant Current Sources for Audio Amplifiers
https://nathaliebeimler.com/tech/audio_amplifier_current_source_comparison.html#:~:text=LED%20reference%20CCS%20This%20is%20a%20very%20simple,in%20low%20thermal%20drift%20of%20the%20output%20current.
Constant Current Sources for Audio Amplifiers
https://nathaliebeimler.com/tech/audio_amplifier_current_source_comparison.html
Constant current sources for audio amplifiers Abstract. Constant current sources are basic building blocks of almost every analog audio amplifier. There are countless circuits and each has its own unique properties. In this article I will compare a small selection of different variants with each other in order to identify their advantages. I will use the best ones for my next audio …
Current Source Amplifiers and Sensitive / Full-Range Drivers
https://www.passdiy.com/pdf/cs-amps-speakers.pdf
noting how the ribbons themselves seemed perfectly happy being driven by a current source and without their usual matching transformer. We built an audio current source that delivered 1 amp of AC current per input volt to a maximum of 10 amps. This kind of amplifier is known as a power transconductance amplifier. Such circuits are fairly common in small chips which
Electronics I Audio Amplifier Design Project
https://jahschwa.com/file/school/audio-amp.pdf
To bias the differential pair, we used a constant current source. Based on a recommendation from Douglas Self, the current source was designed to draw around 600 μA from the differential pair (0.7 V / 1 kΩ = 700 μA). In designing the current source, the forward voltage on the diodes and the transistor’s V be were assumed to be 0.7 V.
LM317 as a Constant Current Source in audio cirсuitry ...
https://myelectrons.com/lm317-as-a-constant-current-source-in-audio-cirsuitry/
Reference Constant Current Source for DIY Audio and beyond (and anything else that requires the really good CCS :)) - I have this project under development. The "magic" CCS promises to have quite outstanding parameters: I nominal as from tens of micro-Amperes up to 400 mA (subject to some 50W power limit)
Voltage source vs. current source amplifiers
https://forum.audiogon.com/discussions/voltage-source-vs-current-source-amplifiers
A current source amp is an amplifier whose output impedance is significantly higher than that of the load and so makes constant current regardless of load. This is not a tube or solid state amp in particular; to achieve this, the amp must employ current feedback, which is a bit different from voltage (traditional) feedback.
Current Sources, Sinks and Mirrors in Audio
https://sound-au.com/ism.htm
1.0 - The Perfect Current Source. A perfect current source can be constructed very simply, requiring only an infinite voltage and an infinite resistance. Unfortunately, this will also provide an infinite current (which will be infinitely constant), but is (infinitely?) excessive for an infinite number of applications.
Current Sources: Options and Circuits
https://www.analog.com/media/en/technical-documentation/application-notes/AN-968.pdf
attachment with internal constant current sources, also called excitation currents. The AD7794 device has two programmable excitation currents that can be programmed from 10 μA to 1 mA (see . Figure 1). The current sources are controlled via a register (I/O register) that enables and directs the current to one of two output pins,
The talk of current amplifier vs voltage in audio ...
https://electronics.stackexchange.com/questions/226401/the-talk-of-current-amplifier-vs-voltage-in-audio
So in theory current steering might be "better". The fact remains that it is impractical, a current output amplifier would apply the maximum voltage it can deliver (it would clip !!!) when no speaker is connected or the speaker's impedance becomes too high. Normal voltage output amplifiers only clip when overloaded when a large signal is applied.
Class A audio amplifier current source design PART1 - …
https://www.youtube.com/watch?v=gdh0ujExatE
This is part one of the single driven element class A amplifier series. The first thing that needs to be addressed is to develop a current source and test it...
A Hybrid Valve MOSFET SE Amp - Complete Project | audioXpress
https://audioxpress.com/article/a-hybrid-valve-mosfet-se-amp-complete-project
R6, R9, and C4 help stability. The current source output is approximately (using Ohm’s law) R5/0.6V. For a 2A current, use 0.3Ω/0.6V = 2A. Because R5 dissipates some heat (1.2W), I used two resistors in parallel to achieve the correct value. There’s a dozen different ways to make a current source, from the arcane to the ridiculously simple.
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