Hi
I am using FET_IV_Gm_PowerCalc (design guide>Amplifier>DC and Bias point) for designing a Power amplifier and finding Bias point. but when I put my transistor Spice model ( I got it from manufacturer site) instead of default transistor, it doesn't work good and the IV curve is incorrect.
My transistor is D2201UK from Semelab with 2.5 W output power.
what is the problem?
Best Regards.
Edited by: m_zerang on May 23, 2015 2:41 PM
I am using FET_IV_Gm_PowerCalc (design guide>Amplifier>DC and Bias point) for designing a Power amplifier and finding Bias point. but when I put my transistor Spice model ( I got it from manufacturer site) instead of default transistor, it doesn't work good and the IV curve is incorrect.
My transistor is D2201UK from Semelab with 2.5 W output power.
what is the problem?
Best Regards.
Edited by: m_zerang on May 23, 2015 2:41 PM
> what is the problem?
You forgot to set the correct voltage range for Vgs.
Looking at Fig. 4 in the D2201UK datasheet, you need a *positive* voltage in the range 6 to 16V.