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Chapter 23 The Design of DC Servos - Audio Power …
https://www.oreilly.com/library/view/audio-power-amplifier/9780240526133/032_9780240526140_chapter23.html
The Design of DC Servos. In the section of this book dealing with input stages I have gone to some lengths to demonstrate that a plain unassisted amplifier — if designed with care — can provide DC offset voltages at the output which are low enough for most practical purposes, without needing either an offset-nulling preset or a DC servo system.
14. The design of DC servos - Audio Power Amplifier …
https://www.oreilly.com/library/view/audio-power-amplifier/9780750680721/22_Chapter014.xhtml
14 The design of DC servos. In the section of this book dealing with input stages I have gone to some lengths to demonstrate that a plain unassisted amplifier – if designed with care – can provide DC offset voltages at the output which are low enough for most practical purposes, without needing either an offset-nulling preset or a DC servo system.
How to design DC servo? | diyAudio
https://www.diyaudio.com/community/threads/how-to-design-dc-servo.39515/
I am putting together a non-feedback, push pull source follower circuit where DC servo is a needed for decent DC offset at the output. Servo's input is taken from the output of the follower and the output from servo goes to the points where Mosfets are biased by DC voltage. How to design DC servo with op amp correctly and for best sound ( i.e ...
Website of Wayne Stegall - Simple DC Servos
http://waynestegall.com/audio/simpledcservos.htm
Amplifier Design and Compensation Procedure Choose LSK170A JFETs and 2N3906 PNPs for these analyses Choose power supplies as +-15V. Z OUT = R L || (R 1 + R 2) = 1kΩ. Choose R L = 2kΩ, therefore R 1 + R 2 = 2kΩ. For gain of 10, R 1 = 200Ω, R 2 = 1.8kΩ. (Ideal gain formula here is A CL = 1 + R 2 /R 1) i B-Q3 = -V SS /(h fe x Z OUT) = 15/(100 x 2kΩ) = 75µA. LSK170A has min I …
DC Servos - sound-au.com
https://sound-au.com/articles/dc-servo.htm
2 - Inverting DC Servo. In Figure 2, there is an amplifier circuit (shown simply as 'Amp') and a DC servo circuit (shown as U1). If the amplifier shows any sign of DC at the output, this is integrated by U1, and that signal is applied to the amp's input to correct the offset.
My_Ref Fremen Edition - Collaborative DC-Servo design ...
https://www.diyaudio.com/community/threads/my_ref-fremen-edition-collaborative-dc-servo-design.257299/
Another approach could be Bob Cordell one's (from his book Designing Audio Power Amplifiers) which uses a single inverting integrator, so to use a single high quality cap, followed by an inverting unity gain integrator to have a non inverting DC-Servo.
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