Bandwidth Problem: Increase Gain & Keep Constant

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SUMMARY

The discussion centers on optimizing bandwidth while maintaining a constant gain in a circuit using noninverting operational amplifiers (op-amps). It is established that increasing the number of amplifiers with lower individual gains can enhance bandwidth without altering the overall gain. Specifically, using multiple amplifiers with a gain of 3.2 can achieve a total gain of approximately 105 while significantly improving bandwidth compared to a single amplifier with a gain of 100. The user plans to test this configuration in Multisim.

PREREQUISITES
  • Understanding of noninverting operational amplifier configurations
  • Knowledge of gain-bandwidth product principles
  • Familiarity with circuit simulation tools like Multisim
  • Basic concepts of resistor configurations in amplifier circuits
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  • Research the gain-bandwidth product in operational amplifiers
  • Explore configurations of multiple op-amps for bandwidth optimization
  • Learn about resistor selection and its impact on amplifier performance
  • Experiment with circuit simulations in Multisim to validate findings
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Electronics engineers, circuit designers, and students interested in optimizing amplifier performance and bandwidth in electronic circuits.

greg997
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hi, I've got simple circuit with noninverting op amp. There are two resistors by which gain is set. And as far as I know the product of bandwidth and gain constant. That is, if we increase the gain the bandwidth decreses and if we decrease the gain , bandwidth increses. The problem is that I am supposed to add an extension to that circuit that would increase the bandwiidth but the gain would stay the same, let's say 100. How is that possible? Thanks to everyone wishing to help me with this.
 
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Yes, you can do that.

Two amplifiers with a gain of 10 will have a greater bandwidth than one with a gain of 100.

If you used 4 amplifiers with a gain of 3.2 you would get a gain of 3.2 * 3.2 * 3.2 * 3.2 which is about 105 and that setup will have a much better bandwidth than one amplifier with a gain of 100.
 
Thanks awfully , firend. I will try to test it in Multisim today.
 

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