2 CE Transistor Connection?

  • Thread starter yy.toh
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  • #1
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Main Question or Discussion Point

The ouput of common emitter transistor 1 is connected to input of common emitter transistor 2.
Please explain about the input and ouput signal (ac).
1.Is there any amplification after the transistor 1?
Normally the input is in uA, the output is in miliA
2.Is there any amplification after the transistor 2?
The output from transistor 1 is in miliA, how should it responsed by the transistor 2?
 

Answers and Replies

  • #2
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In the thumbnail, a 2-transistor common emitter (differential) amplifier is followed by an emitter follower (Q3). The first transistor (Q1) is a common-collector (emitter follower) current amplifier, and the second transistor (Q2) is a common-base voltage amplifier. A 10-mV input signal gives a 150 mV pulse out. Is this what you mean?

Bob S
 

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