Monthly Archives: March 2006

Current-feedback op amps

A few weeks ago, someone asked me about current-feedback op amps and I had the very basic answer that they had a low-impedance inverting input and relied on current, instead of voltage, to drive this input. This gave the op-amps higher slew rate (and bandwidth) at the expense of precision. A more thorough overview of these op amps can be found in chapter eight of Texas Instrument’s Op Amps for Everyone (linked below.) This is a four hundred page book and has some well written sections on various topics, including noise. An excellent read for those concerned with analog design.

slod006b.pdf )