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Audiopole – Importateur Audio Professionnel
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Easy Chip Amplifier: Audio Amplifier Feedback - Two-Pole ...
https://blog.easychipamp.com/2021/01/audio-amplifier-feedback-two-pole.html
A brief summary: Similarly to Miller's single dominant pole, the location of the two poles depends on the amplifier's stage inside the local feedback loop. The zero is located at the frequency f z = 1 2 π R P ( C P 1 + C P 2) Unity loop gain frequency is f 0 = B × g m ( C P 1 + C P 2) 2 π C P 1 C P 2, where B is the transfer function of the feedback network and g m ≈ 1 r e + R e …
Easy Chip Amplifier: Audio Amplifier Feedback - Lead ...
https://blog.easychipamp.com/2021/02/audio-amplifier-feedback-lead.html
ω p ω z = R 1 C ( R 1 | | R 2) C = R 1 R 1 | | R 2 = R 1 + R 2 R 2 = 1 + R 1 R 2. That is, the zero and the pole are separated by a factor equal to the amplifier's ideal closed loop gain at DC as set by the feedback network. For an amplifier with 20dB gain, the pole will always be a decade higher than the zero.
A LOW-DISTORTION CLASS-AB AUDIO AMPLIFIER WITH …
http://wordpress.nmsu.edu/pfurth/files/2015/06/Low_Distortion_Audio_Amplifier_Mohan_2011.pdf
Audio ampli ers require high current at the output stage to drive low resistive loads [5]. The main fea-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
Small Audio Power Amplifier Using Op-Amp and Two ...
https://www.deeptronic.com/electronic-circuit-design/small-audio-power-amplifier-using-op-amp-and-two-transistors/
Figure 2. Schematic Diagram of Small Audio Power Amplifier Circuit Using Op-Amp and Two Transistors. Let’s imagine the op-amp is omitted, then the base-to-base voltage is the voltage between R4 and R5 which is dropped by two diodes D1-D2. This voltage is slightly higher than base-to-base bias requirement to produce small leakage current when ...
Feedback Amplifiers: One and Two Pole cases
https://web.ece.ucsb.edu/Faculty/rodwell/Classes/ece218b/notes/Feedback2.pdf
Pole: 1 E FF EF R CR RR − ⎛⎞ ⎜⎟ ⎝⎠+ Typically, the pole frequency is much higher than the zero, so it does not bend the root locus very much.
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