Re: current-mode opamps

On Sun, 24 Feb 2008 19:07:18 -0800, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:



At G=2, 100 ohm load, they suggest that both resistors be 715 ohms for
good large-signal performance. Playing with the resistors changes
transient response but doesn't much affect the apparent 10 pF input
capacitance.

The eval board, and the S-params setup, effectively drive the ni input
from a 25 ohm source. The frequency response curves are unclear on
what the generator source impedance may be. They give inverting and ni
curves small-signal, but the large-signal stuff is all inverting. Are
they trying to hide the actual performance?

TI is beginning to disappoint me.

John


John, have you had a chance to compare the TI CFBs with the AD
versions?

(Great thread, by the way...)

Thanks,

Tom


.

Relevant Pages

  • Re: current-mode opamps
    ... good large-signal performance. ... Playing with the resistors changes ... transient response but doesn't much affect the apparent 10 pF input ... from a 25 ohm source. ...
    (sci.electronics.design)
  • Re: current-mode opamps
    ... good large-signal performance. ... Playing with the resistors changes ... from a 25 ohm source. ... John, have you had a chance to compare the TI CFBs with the AD ...
    (sci.electronics.design)
  • Re: current-mode opamps
    ... good large-signal performance. ... Playing with the resistors changes ... from a 25 ohm source. ... John, have you had a chance to compare the TI CFBs with the AD ...
    (sci.electronics.design)