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Parallel Transistor - Selection of Ic?
Parallel Transistor - Selection of Ic?
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Old 23rd June 2020, 11:47 PM   #11
PRR is offline PRR  United States
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Parallel Transistor - Selection of Ic?
Quote:
Originally Posted by davidsrsb View Post
MC is the only audio application where parallel devices makes some sense...
It "makes sense" for "150 Ohm dynamic microphone" inputs, if fat devices are not available/affordable.

And for *some* "strain gauge" transducers picking up audio.

It is the only hope for transformerless ribbon microphones with good hiss level; sadly it just takes too many devices for sub-Ohm sources.
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Old 25th June 2020, 01:43 PM   #12
Mark Tillotson is offline Mark Tillotson
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16 ZTX851's in parallel would be a strong contender for sub-ohm source though. 0.274n/4 = 68.5pV/√Hz, which is the Johnson noise of 0.28 ohms. 10mA each, 0.16A bias in total.
 

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