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Chip Amps Amplifiers based on integrated circuits

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Old 4th November 2004, 02:09 PM   #11
Sheldon is offline Sheldon  United States
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Quote:
Originally posted by richie00boy


Actually, it's nothing to do with shunting resonances. You place it close to the board because the further away you place it the higher the inductance of the connection, which limits the zobels usefulness (as it is trying to compensate for the phase angle caused by inductive loads).
Quite right. I guess the term "oscillation" would have been better too. Just curious; as the issue is the phase angle of the feedback eventually going positive, it follows that a zobel would not be needed on an amp with no global feedback?

Sheldon
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Old 4th November 2004, 04:02 PM   #12
Did it Himself
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Correct. No loop feedback = no problems with phase shift.
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Old 17th December 2004, 12:38 AM   #13
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The board does not have a lable for the Zoebel resistor. I assume that it is soldered to the holes parallel to the nfb resistor.
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