Op Amp built with discret components and having GBP over 30 MHz.

In summary, the conversation discusses the use of a schematic for an Op Amp with a GBP over 30 MHz. One person suggests using a monolithic IC in SMD packaging, but the other person argues that discrete component construction is preferable due to the sensitivity of SMD ICs to ESD. The conversation also mentions the possibility of using external diodes for ESD protection and the complexity of designing a discrete op-amp for this purpose.
  • #1
Ravaner
134
3
Hello, for technical reasons I'm looking for a schematic of an Op Amp built with discret components and having GBP over 30 MHz.
 
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  • #2
Is this a class assignment? Otherwise, I can think of no reasons why discreet component construction is preferable to a monolithic op-amp.
 
  • #3
Hello, thanks for your reply. In fact I previously used an monolithic IC existing only in smd packaging, and as these IC's are very sensitive to Esd, it was necessary to replace them very often, and moving an smd off ... That the reason for which I had rather to use discrete components easy to replace.
 
  • #4
Most IC packages will have the schematic included in the datasheet. Though the finer details of the channel widths and such are probably omitted.
 
  • #5
You can easily protect a chip from ESD with external diodes. Making a discrete op-amp for that bandwidth would be far more difficult than just adding those diodes. If you've some problem with just using diodes, we can discuss fancier protection circuits--which would still be orders of magnitude simpler than designing a discrete op amp.
 

1. What is an op amp built with discrete components?

An op amp, or operational amplifier, is an electronic component used to amplify and process electronic signals. A discrete component op amp is built using individual electronic components, such as resistors, capacitors, and transistors, rather than a single integrated circuit.

2. What does GBP refer to in an op amp?

GBP stands for Gain-Bandwidth Product, which is a measure of the bandwidth of an op amp. It represents the frequency at which the op amp's open-loop gain drops to unity (1) and is typically measured in megahertz (MHz).

3. How is an op amp's GBP calculated?

An op amp's GBP is calculated by multiplying the open-loop gain (A) by the unity-gain bandwidth (fT). The formula is GBP = A x fT. The GBP is an important factor to consider when selecting an op amp for a specific application.

4. Why is a GBP of over 30 MHz desirable in an op amp?

A GBP of over 30 MHz indicates that the op amp has a high bandwidth, meaning it can process signals with high frequencies. This is desirable in applications where fast signal processing is required, such as in audio and video equipment, telecommunications, and medical devices.

5. Can an op amp with a GBP over 30 MHz be built using discrete components?

Yes, it is possible to build an op amp with a GBP over 30 MHz using discrete components. However, it may require careful design and selection of high-quality components to achieve the desired performance. It is also important to consider other factors, such as stability and noise, in addition to the GBP when designing an op amp circuit.

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