| psychosteve |
Does anyone know the CA339E quad volage comparitor be used for a phaze shifter to bridge a pair of power amps???
has anyone tried using this chip before, i know its a military chip and has great temp specs, just not a lot of other info.
Help is grately received, see you all later, steve.. .. |
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| Steven |
Hi Steve,
I assume that the CA339 is equal to the LM339 comparator, just a different brand.
The 339 is a quad comparator, not a quad opamp. That means it has no frequency compensation and only an open collector output. Even with a pull up resistor from the output to the positive power supply, it would result in a bad opamp, still no frequency compensation and not designed for linearity, only for gain. The input stage is similar to the LM324 quad opamp and that one is a very bad audio performer.
So forget the mil-spec temperature range (btw I thought it was the 139 version that has the better temp spec) and select a real audio opamp for your application, or a discrete solution.
Steven |
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| xplod1236 |
| Try the drv134 from TI. |
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| darkfenriz |
why not use 'normal' , linear opamp?
do you make an amp for the army?:D
regards |
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| psychosteve |
ah well, just a thought..
im not making an amp for the army, im a specialist engineer and i got my hands on 50 of these chips. so since they where free i thought what can i do with them!!!
and as ive still got them, any ideas??? apart from sell them and buy something else..
cheers for the help guys, see you later, steve.. .. |
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| darkfenriz |
hm.. a comparator?
kind of current protection...
class D...
not many applications in audio I guess
cheers |
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