VFA, CFA, Bipolar or CMOS - Which better

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VFA, CFA, Bipolar or CMOS - Which High-Speed Amplifier Is Best for Your Low-Noise Application?

Introduction
Ten years ago, the bandwidth of a state-of-the-art highspeed
amplifier was 200MHz. With advancements in
fabrication processes, current high-speed amplifiers have
broken the GHz barrier. Savvy engineers look for more than
speed in making their amplifier selections. The most defining
characteristic of a high-speed amplifier is its feedback
topology, using voltage feedback or current feedback. The
strengths and limitations of each topology reveal its optimal
uses.
The basic circuit topologies of voltage-feedback amplifiers
(VFAs) and current-feedback amplifiers (CFAs) are
presented here. The differences in topology are correlated to
noise and distortion performance. Details about these
performance limitations accompany typical values. Since
both topologies will be presented in their bipolar
implementation, a CMOS example is also included for a
complete introduction into high-speed amplifier options.

lxzhero1

看看，谢谢

hadeheng

谢谢楼主分享。