Understanding a schematic diagram

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SUMMARY

This discussion centers on understanding a schematic diagram for an electrical engineering exercise involving voltage gain and output resistance calculations. The circuit requires two power supply connections of +10V and +5V, alongside a signal source labeled "u1," which is typically a small AC signal, suggested to start at 0.1V. The user expresses confusion due to their previous experience with single power supplies and their inexperience with FET and MOSFET components.

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  • Basic knowledge of electrical engineering principles
  • Understanding of FET and MOSFET components
  • Familiarity with schematic diagrams
  • Experience with simulation tools like MicroCap or Multism
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  • Research the operation of FET and MOSFET transistors
  • Learn how to simulate circuits using MicroCap or Multism
  • Study voltage gain calculations in amplifier circuits
  • Explore the differences between AC and DC signal sources
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Electrical engineering students, circuit designers, and anyone looking to deepen their understanding of amplifier circuits and simulation tools.

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Homework Statement



I'm an electrical engineering student and in this exercise I'm asked to calculate (and simulate in MicroCap or Multism) voltage gain and output resistance. The problem is that I don't understand how the voltage source (s) is/are connected according to this schematic diagram.

On the left I can see "u1" but then then I also see +10V and +5V. My teacher didn't give me a value for u1, do I need three voltage sources in this circuit or are +5V and 10+ readings I must get by setting a value for u1 based on the given data?

I'm so sorry if the answer to this is too obvious, I'm learning and honestly, I don't get it. That's why I'm here :)

Thanks a lot for your help.
 

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The +10V and +5V are for power supply connections. You'll need a source for each. The u1 is a signal source, typically a small ac signal that is to be amplified. You might want to try a 0.1V ac source to begin with and see what the circuit amplification looks like. Adjust for reasonable results.
 
Thanks gneill,

That was my first guess but I got confused because I've always worked with one power supply, not with two as in this exercise. Plus I'm new to FET and MOSFETS so I wasn't really sure of what I was doing.

Cheers.
 

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