Ads learning record (lna_atf54143)

• Step1： Test the input and output characteristics of the transistor （schematic1）
  
• Step2： DC simulation —— Automatic generation of DC bias circuit （schematic2）
  
  
  （ Generated bias circuit ）
• Step3： Draw the bias circuit on the circuit diagram （schematic3）
  
• Step4： Stability analysis （schematic4）

First, add components according to the stability requirements .

Add the template


Simulation results , add to MaxGain and StabFact

Within the scope of work （2.4~2.5G） Stability coefficient K<1, So it's unstable , should K>1.
The next step is to add inductance as negative feedback at the source level to stabilize the system . add to VAR As a variable control of inductance .

Put the ideal DC_Feed Replace components with real devices