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Old 20th June 2013, 04:22 AM   #1
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Default What´s noise floor in audio amplifier?

What is this noise in the audio signal?
What affects the audio signal?
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Old 20th June 2013, 05:42 AM   #2
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Type of transistors used, especially in the input stage.
Idle current, also most important in the input stage.
Gain structure.
Power Supply rejection, grounding, to name a few.
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Old 20th June 2013, 07:46 AM   #3
DF96 is offline DF96  England
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Thermal noise too. That sets the base below which it is impossible to go.
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Old 20th June 2013, 08:26 AM   #4
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Yes, and then is the issue if low voltage noise or low current noise is required.
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Old 20th June 2013, 08:38 AM   #5
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Quote:
Originally Posted by OMARDUENAS View Post
What is this noise in the audio signal?
What affects the audio signal?
See also Designing for Ultra-Low THD+N in Analog Circuits
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Old 19th July 2013, 04:02 PM   #6
Jsixis is offline Jsixis  United States
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Old 20th July 2013, 10:41 AM   #7
AndrewT is offline AndrewT  Scotland
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Print them off and read at your leisure.

Add interference noise to those lists.
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