Can anyone suggest an amplifier design that meets specific requirements?

[AC23]

Hey, I need to design an amplifier using either BJTs or MOSFETS (or both) that meets the following requirements:
Overall voltage gain: 800

Input impedance : 200Kohms

Output impedance: 200 ohms

Frequency band width: 10MHZ

Can anyone help me with what kind of arrangement of amps can possibly achieve those requirements?

Thanks!

 

[berkeman]

Welcome to PF, AC23. This is a great place. Keep in mind that homework problems should be posted in the homework forums, and you need to show some of your own work in order to get us to help. We don't do your homework for you.

That having been said, what is your background? Is this for a 1st or 2nd year intro EE class? What have you learned so far in this class that you can use for this project? Would you think that a BJT or a MOSFET would be a better choice for the 200kOhm input impedance requirement?

 

[ravenprp]

Sure, there are a few different amplifier designs that could meet these requirements. One possible option could be a common emitter amplifier using BJTs. This type of amplifier can provide high voltage gain and can be designed to have a high input impedance. However, it may not be able to achieve the desired output impedance of 200 ohms, so additional buffering may be needed.

Another option could be a class AB push-pull amplifier using both BJTs and MOSFETs. This type of amplifier can provide high voltage gain, high input impedance, and can also be designed to have a low output impedance. However, it may not be able to achieve the desired frequency bandwidth of 10MHz, so careful component selection and design may be necessary.

Ultimately, the specific amplifier design will depend on a variety of factors such as power requirements, cost, and available components. It may be helpful to consult with an experienced engineer or do some research on different amplifier topologies to find the best fit for your specific requirements. Best of luck with your project!