Signal Source - (Thévenin, Norton)

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SUMMARY

The discussion centers on calculating the Thévenin voltage, Norton current, and source resistance for a signal source producing 30 mV across a 100 kΩ resistor and 10 mV across a 10 kΩ resistor. The output voltage measurements across the load resistor (R_L) are critical for establishing two equations necessary to solve for the unknowns: the source voltage (V_s) and source resistance (R_s). The user is guided to measure the voltage across the load resistor to derive the required parameters effectively.

PREREQUISITES
  • Understanding of Thévenin's and Norton's theorems
  • Basic knowledge of circuit analysis
  • Familiarity with voltage measurement techniques
  • Concept of load resistance in electrical circuits
NEXT STEPS
  • Study Thévenin's theorem in detail
  • Learn about Norton's theorem and its applications
  • Practice solving circuit problems involving source resistance
  • Explore voltage divider circuits and their analysis
USEFUL FOR

Electrical engineering students, circuit designers, and anyone involved in analyzing signal sources and their characteristics.

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I am troubled by this question. The book for this new course seems to have different terminology then what I am accustom to. I'm stuck on this question, because I don't understand what it is asking.

question) A particular signal source produces an output voltage of [itex]30\,mV[/itex] when loaded by a [itex]100\,k\Omega[/itex] resistor and [itex]10\,mV[/itex] when loaded by a [itex]10\,k\Omega[/itex] resistor. Calculate the Thévenin voltage, Norton current, and source resistance.answer) not sure.

my guess is that there is some signal source, say [itex]V_s[/itex] that is in series with a resistor, say [itex]R_s[/itex]. [itex]R_s[/itex] (which is the source resistance) is then connected in series to a load resistor, say [itex]R_L[/itex]. Where [itex]R_L[/itex] has the values [itex]R_L=\{100\,k\Omega, 10\,k\Omega \}[/itex].

So when you load the signal source with these resistance values, an output of [itex]30\, mV[/itex] and [itex]10\, mV[/itex] is measured respectively.

Where do I measure this voltage? Across just the signal source? Across the load? Across the resistor and signal source?

Any help would be very appreciative.
 
Last edited:
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The measured voltage would be across the load RL.

Also, the two measurements will give you the required two equations for solving the two unknowns (Vs and Rs).
 
doodle said:
The measured voltage would be across the load RL.

Also, the two measurements will give you the required two equations for solving the two unknowns (Vs and Rs).

Thanks doodle!

Pretty easy question then :)
 

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