I just want to know some precautions in a design of an amplifier about noise reduction !
Noise within an amplifier can come from many sources.
You can minimize noise by paying close attention to the following:
1. Adequate Power Supply filtering.
2. Proper grounding techniques.
3. Proper signal routing.
4. The use of shielded cables where necessary.
5. Using a well shielded enclosure.
Anything else anyone?
If it is a low-level application like a phono amp it is also important
to choose low-noise components at critical places. Low-noise
BJTs/JFETs/op-amps, and low-value resistors etc.
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