Favorite quad op-amps for synth design?

[danial stocks]

>Weren't there some op-amps that had MOSFET inputs?
>Does the CA3140 or 3130?

Yes these are mosfet i/p... now Natsemi's LMC series op amps are all cmos 
designs.. some have bias currents under 1pa . LMC6081 was my chip of choice 
for a s/h with bias current of 10fa [1 femtoamp = 10^-15A!] and offset vtg 
of 350uV max.. also, with total CMOS design these draw sub milliamp supply 
currents and so can run for months on a battery if desired. [LMC6061 Isupp = 
20uA!] The LMC6081 comes in a dual pkg as the LMC6082.. Both the single & 
dual versions are arouind the $8 -10 price range here..
Cheers,
Dan
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com