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Old 14th September 2014, 07:07 PM   #3281
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SAE "hypersonic class A" used em
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Old 19th December 2014, 04:49 AM   #3282
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Hey all. I compiled the noise measurements from this thread so far. I may have missed some, and not all the measurements were made on all transistors.

BJT noise measured by Richard Marsh

Q		Hfe	Ic	Vce	10Hz	100Hz	1KHz	10KHz	100KHz	Rb

BC337		700@5mA	3mA	15V		3.5nV	0.6nV	0.65nV	0.53nV	17.4
BC327		407@5mA	3mA	15V	5nV	0.7nV	0.5nV	0.55nV	0.55nV	10.8

BC550C										167
BC560C			3mA	15V	3nV	2.5nV	1.6nV	1.6nV	1.6nV?	170

2N4401		170@5mA	1mA	15V	1.5nV	0.9nV	0.65nV	0.65nV	0.8nV	38
			3mA	15V	4.5nV	1.3nV	0.6nV	0.6nV	1.3nV	38
2N4403										40

2N5087		460@5mA	100uA	15V	2.5nV	3.2nV	1.4nV	1.5nV	1.3nV
		460@5mA	3mA	15V	2.2nV	4nV	0.8nV	0.7nV	0.75nV

2N2907A		280@5mA	3mA	15V	6nV	2.4nV	0.95nV	0.75nV	0.75nV

2SA970			3mA	15V		4.5nV	1.1nV	0.9nV	1nV	25
2SC2240GR	330@5mA	3mA	15V?	2nV	2.8nV	0.7nV	0.65nV	0.6nV	39

2SB737			3mA	15V		4.2nV	0.35nV	0.5nV	0.3nV


MPSA18										900?

2N2484A			3mA	15V	40nV	12nV	4nV	2.6nV	2.4nV
2N2222A		133@5mA	1mA	15V	3nV	1.2nV	0.9nV	0.85nV	1nV
			3mA	15V	4.5nV	3.3nV	0.9nV	1nV	0.9nV
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