Op Amp question

[Heiko van der Linden]

Hi Tim,

About your questions. I hope this helps.

NE5534 manufacturer among others Texas instr.
high speed precision opamp with compensation fo a gain greater than three.
So don't make unity gain followers with this baby unless you want a free
radio transmitter.

datasheet:
http://www-s.ti.com/sc/psheets/slos070/slos070.pdf

The NE5532 is about the same opamp but it is a dual opamp and it is
compensated for unity gain applications and will not oscillate like mad in
such applications. And the slew rate for the 5534 is faster (14v/us compared
to 9V/us)

datasheet:
http://www-s.ti.com/sc/psheets/slos075a/slos075a.pdf

Replace the TL071 with a LF411. If you can't get this one use a LM711 (heh
heh the first time I can plug this baby ;-) )
These are opamps with high input impedance, the 741 is not so good in this
respect.

About the 4570 this is probably a JRC4570. I don't know this one. I think I
have one of those that I desoldered from a very old CD-player from a unknown
brand. I don't know if it is good or bad.

Heiko