How to Build a Simple BJT Differential Amplifier with a Gain of 20?

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SUMMARY

This discussion focuses on constructing a simple BJT Differential Amplifier circuit with a target gain of 20. Participants suggest replacing the transistors Q1 and Q2 with resistors to simplify the design. The conversation emphasizes the need for clarity in circuit design and the importance of achieving the desired gain effectively.

PREREQUISITES
  • Understanding of BJT (Bipolar Junction Transistor) operation
  • Basic knowledge of amplifier gain calculations
  • Familiarity with circuit design principles
  • Experience with electronic components and schematics
NEXT STEPS
  • Research BJT Differential Amplifier design techniques
  • Learn about gain calculation methods for amplifiers
  • Explore resistor configurations in amplifier circuits
  • Study common emitter amplifier characteristics
USEFUL FOR

Electronics enthusiasts, circuit designers, and students studying amplifier design who are looking to build and optimize BJT Differential Amplifiers.

alexfung1992
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Does anyone know how to build a simple BJT Differential Amplifier circuit? And also need to gain around 20..emergency please help. Thanks for that.

As I build a circuit but is not simple enough, please have a look for that and any comment for this circuit?
CurrentMirrors_x2.png
 
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Try replacing Q1 and Q2 with two resistors.
 
phyzguy said:
Try replacing Q1 and Q2 with two resistors.

I see, thanks a lot
 

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