Z
zbb
- Jan 1, 1970
- 0
I posted my two cents about this in here before I noticed that there is this sticky: http://www.electronics-lab.com/forum/index.php?topic=39648.0 ; sorry. If anyone can move that back here?
I started from the original design and modified that a bit. Indeed: Q1 is really essential and can not be eliminated; the higher the negative supply rail is (=less neg voltage), the lower that resistor to the base must be.
If I want to get high-voltage op-amps I have to order them from the US or Europe; UPS or DHL package post from there is US$30. I am too frugal for such expense, so TL081 it is for me.
I started from the original design and modified that a bit. Indeed: Q1 is really essential and can not be eliminated; the higher the negative supply rail is (=less neg voltage), the lower that resistor to the base must be.
If I want to get high-voltage op-amps I have to order them from the US or Europe; UPS or DHL package post from there is US$30. I am too frugal for such expense, so TL081 it is for me.
