Electrical Engineering Asked on November 19, 2021
I’m looking at using a high voltage BJT as an emitter follower in a high voltage tube audio application (guitar amp). Unfortunately in the range of 200V, most BJTs are marketed as switching transistors and have no noise specs etc. Also I’m aware transistors in this range have a low beta, that’s fine, I’m looking to still have some source loading.
My assumption is due to a large input voltage, any noise that the transistor would add to the circuit is effectively negligible. That being said, I am not familiar with understanding noise figures in dB vs affect on something like an emitter follower…
Question: In general for emitter followers, with a typical ~100mV to ~10V AC signal bounded in the audio frequency realm, Does the quality of transistor matter?
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