🚀 go-pugleaf

In article <2185@thor.acc.stolaf.edu> holdenm@thor.stolaf.edu (Mark Holden) writes:
>
>	I'm looking for pin-compatable replacements for 1458/4558 op-amps.
>It's for an audio application, so I'm looking for the best frequency response
>(secondary) and the lowest noise (primary).  

The few references I know that would fit your needs are:
	TL071 - TL081 - LF353 uA772: all those are equivalent cheapy dual
		op-amps . The input equivalent noise level is around
		15-18 nV/(Hz)^1/2, and the gain * band product is around 3MHz
		(not bad for microphone amplifiers)

	NE5532 - LM833: those ones are a bit more expensive but the result is
		better: noise level around 5 nv/(Hz)^1/2 and gain * band of
		10 to 15 MHz (very good mic amps!)

>	Are there any ones that have a FET *output* stage, or don't such
>things exist?

Sorry, I haven't heard about such devices.

Hope that helps.

	Olivier.




-- 
Olivier GAUTHEROT,// Postgraduate // Electrical Engineering Dept.
University of Wales // Swansea, SA2 8PP, U.K.	(+44 792 205678 ext 4564)
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