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Current Sources, Sinks and Mirrors in Audio
https://sound-au.com/ism.htm
Current mirrors have the ability to greatly increase open loop gain and linearity, giving better open loop performance, which translates to better closedloop performance. This short article looks at the various types, from the theoretical or 'ideal' device, through various practical examples.
Chapter 11: The Current Mirror [Analog Devices Wiki]
https://wiki.analog.com/university/courses/electronics/text/chapter-11
Because in a current mirror the input and output are currents, it is easier to convert the input to a voltage first and then convert a voltage back to a current at the output. It should be noted that these two stages of the current mirror may have a linear relationship (for example where V OUT = I IN R and I OUT = V IN /R) like a resistor. In figure 11.1.1 we see the classic operational …
Audio Mirror SET Monoblock Power Amplifier - The …
https://www.theabsolutesound.com/articles/audio-mirror-set-monoblock-power-amplifier
Audio Mirror’s Vladimir Bazelkov is no stranger to the 6C33C-B triode having started his electronics career in Bulgaria some 25 years ago. Based in the U.S. since October 2000, he has continued to refine his designs—to wit, the 45-watt amplifier under review sounds big and powerful and expands the reach of SET designs to even moderately sensitive 88-to-90dB …
Discrete audio amplifier project PT4 current mirror - …
https://www.youtube.com/watch?v=7_OQvmzU6S8
To improve the input stage performance, a current mirror circuit will be added. In this installment of the project I look at the current mirror itself. The v...
Current Mirror Amplifier - Georgia State University
http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/curmir.html
The current mirror active load is a way to accomplish high gain for a single stage differential amplifier. The NPN transistors Q1 and Q2 shown make up the differential amplifier and Q3 and Q4 (PNP) make up the current mirror. The current mirror acts as the collector load and provide a high effective collector load resistance, increasing the gain.
6.5 Current mirror OpAmp - University of Minnesota …
https://www.d.umn.edu/~htang/ECE5211_doc_files/ECE5211_files/Chapter6_part3.pdf
amplified by the current mirror gain to the output. The total current to charge/discharge the load is KI b. So the slew rate is Due primarily to the larger unity-gain frequency and slew rate, the current-mirror OpAmp may be preferred over the folded-cascode OpAmp. However, one has to be careful that the current-mirror OpAmp has larger input noise as well, as its input stage
Current Mirror - diyAudio
https://www.diyaudio.com/community/threads/current-mirror.243568/
So BJT amplifier designers have very little motivation to increase VAS current mirror output impedance above 500Kohms. Even less when the OPS is a cascade of two emitter followers like The Honey Badger amplifier here on diyAudio.
Elliott Sound Products - Audio Power Amplifier Design ...
https://sound-au.com/amp_design.htm
no current mirrors or sources (other than the bootstrap) It is stable with all conventional loads, capable of 80W into 8 Ohms, and simple to build. Using only commonly available parts, it is also very inexpensive. Note:
An Introduction to Current Feedback Amplifiers for Audio
https://www.ovationhifidelity.com/wp-content/uploads/2019/05/An-Introduction-to-CFA-Amplifiers-for-Audio.pdf
An Introduction to Current Feedback Amplifiers for Audio www.ovationhifidelity.com Page 1 Introduction. CFA topology amplifiers have been around in the IC industry for 30 years. Following a patent claim by David Nelson, the earliest commercial offering was a module from Comlinear in 1982 and a few years later, I’s from both omlinear and Elantec.
Can anyone help me explain this circuit? | diyAudio
https://www.diyaudio.com/community/threads/can-anyone-help-me-explain-this-circuit.284760/
Hi, This is what I traced from a commercial, working amp. (I don't know if it's against the rules so its name is not displayed here) I'm quite confused about the part around the supply pins (4&7) of the opamp. It looks to me that they are used as phase splitter as well. But am I …
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