Blackman's impedance formula (Open loop gain)

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SUMMARY

The discussion centers on the application of Blackman's impedance formula to determine input resistance in a circuit involving transistors and resistors. Participants express confusion regarding the calculation of open loop gain, which is essential for understanding the circuit's behavior. The formula is critical for analyzing current dividers in electronic circuits. Clarification on the steps taken by the teacher to derive the open loop gain is sought by multiple users.

PREREQUISITES
  • Understanding of Blackman's impedance formula
  • Familiarity with transistor characteristics and configurations
  • Knowledge of current divider circuits
  • Basic principles of open loop gain in electronic circuits
NEXT STEPS
  • Study the derivation of Blackman's impedance formula in detail
  • Learn about calculating open loop gain in transistor circuits
  • Explore current divider analysis techniques
  • Review examples of input resistance calculations in similar circuits
USEFUL FOR

Electrical engineering students, circuit designers, and anyone involved in analyzing transistor circuits and their impedance characteristics.

Electro_vass
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Homework Statement


Determine the input resistance using blackmans impedance formula.
I know all the ressisor values, and transistor data.

Homework Equations


[/B]
Blackmans impedance formula

The Attempt at a Solution



Our teacher has given us a example on how to find the open loop gain, but I don't understand what he has done. Do anyone know how he has found the open loop gain?
Bilde uten tittel.png
Bilde uten tittel.png
 
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Electro_vass said:
Do anyone know how he has found the open loop gain?
What is it, specifically, you're not sure about?

Note that the circuit shown is just a current divider.
 

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