1. Home
  2. Electronics Design
  3. Why no gain like this?
  4. Page 2

Why no gain like this?

Vg = (750k+1.270)/750k = 2.693

So with your 1 Volt in you should be getting ~2.69 output..

If you are getting less, apply a DC of 1 Volt in and then if you do get this gain correctly, you maybe running into a BandPass issue with that large loop back R you're using..

There is a small amount of Cap in an Op-amp to help reduce the chance of oscillation, something that you get with comparators.

Also, you may want to look for "Miller Effect"

formatting link

Get down to ~page 30 and see the second on miller effect..

Jamie.

Reply to
Jamie
Loading thread data ...
[...]

I am not _that_ old :-)

It was mostly CMOS stuff, CD-series. Nice thing is that the quiescent current isn't too high when mid-biased, as long as you kept the supply around 4-5V. Of course, there wasn't any bandwidth to write home about.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
Reply to
Joerg

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.