Overview: The monolithic Current Feedback
Op Amp is 15 years old, yet its operation remains much less broadly understood
than that for its voltage feedback counterpart. Current Feedback Op Amps
provide significant performance advantages in areas such as available high
frequency gain for large signals. They post performance disadvantages in
other areas such as DC errors. Both the advantages and disadvantages are
linked to the underlying circuit architecture. Understanding the architecture
within allows the designer to better utilize current feedback capabilities
as well as to avoid the pitfalls when optimizing system performance.
This seminar will explain the difference between Voltage Feedback and
Current Feedback amplifier architectures. It will address the question,
"Which amplifier type is best for my application?" Current Feedback
and Voltage Feedback will be compared and contrasted for familiar amplifier
metrics such as: bandwidth, slew rate, dc errors and noise.
After this seminar, the attendee will be able to confidently choose between
Current Feedback and Voltage Feedback for his/her application.
Length: 60 minutes
Published Date: May 2003
Topics covered in this online seminar include:
- Amplifier Circuit Architectures
- Loop Gain Analysis
- Amplifier Specifications
- Common mistakes when using high-speed amps
- Required Bandwidth
- Large Signal Response
- Sources of Noise and DC Errors
- Current Feedback Amplifiers @ National
Presenter: Alan Buchholz is a
Design Manager with National Semiconductor's Amplifier Products Group in
Fort Collins, Colorado. |
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