Re: Offset voltage nulling on transimpedance amp

John Perry wrote:
CC wrote:
Pooh Bear wrote:
Can you still get those integrated chopper amps like the one Intersil
? used to
make ?

Yes. There are many available now, such as the National LTC1050,

--duh. Linear Technology, of course.

ADI
AD8551, Maxim MAX430, TI TLC2654. Google "chopper stabilized amp" for
more, and for info.


I could look again, but I don't recall choppers as being suitable for
wideband applications.

You don't use them as amps in a high-speed application. You use them to
servo the high-speed amp's offset to near zero. In this mode, they're
very effective.

Google "composite amplifier".

John Perry
.