[sdiy] how to power my opamp?

[Paul Perry]

At 07:33 AM 14/08/03 -0500, Marcel binary wrote:

>i want to know what's the best (most common?) 
>way to power an opamp(TL084)with 9V DC power 
>supply (i need +9V and -9V).

Another way is to create a -9 supply from a 7662 
(I think it is) charge pump voltage converter chip.
I do this in one of my units.
These chips are quite common (the first was the 7662,
now there is a whole family with various improvements
like operating at ultrasonic fequency)

paul perry Meloburne Australia