Finding number of zeros in emiter follower

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SUMMARY

The discussion focuses on determining the number of zeros in an emitter follower circuit while analyzing its high-frequency response. The user employs the OPEN CIRCUIT time constant method to find poles and midband gain, identifying two poles due to the presence of two independent capacitors. It is concluded that there are two zeros at the zero frequency origin, attributed to the AC coupling of both the input and output of the follower.

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  • Understanding of emitter follower circuits
  • Familiarity with AC coupling concepts
  • Knowledge of the OPEN CIRCUIT time constant method
  • Basic principles of circuit analysis and transfer functions
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Electrical engineers, circuit designers, and students studying high-frequency circuit analysis who are interested in understanding the behavior of emitter follower circuits.

erece
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how can i find the number of zeros in a circuit ?
i am attaching a circuit of emitter follower in which i want to find the high frequency response. Instead of deriving the whole transfer function , i am using OPEN CIRCUIT time constant method to find the poles and midband gain formula by neglecting the effects of capacitors.
Now i know that the number of poles will be equal to 2 because there are 2 independent capacitors.
But i am not able to find the number of zeros. Neglect the load capacitor CL
PLEASE HELP
 

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Sorry for the delay in reply. Unfortunately I cannot read the detail in your diagram.
Since the follower input and output are both AC coupled, I would expect two zeros at the zero frequency origin.
 

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