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.. ..
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.. ..
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
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
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.. ..
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.. ..
hm.. a comparator?
kind of current protection...
class D...
not many applications in audio I guess
cheers
kind of current protection...
class D...
not many applications in audio I guess
cheers
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