Calculation of a JFET amplifier stage

Plotting I-V characteristics. Operating point selection (Q-point selection). DC and AC amplifier analysis. Frequency response calculation
Ampflier JFET
The Amplifier JFET software is designed for the calculation of JFET (Junction Field-Effect Transistor) amplifier stages. The program's database contains approximately 1,000 foreign and domestic transistor models. Featuring flexible settings, the software allows you to specify any amplifier stage parameters and adjust the operating point (Q-point) position. Using the "detailed (step-by-step) solution" function, you can generate a comprehensive amplifier calculation report in MS WORD format.
Amplifier JFET is an educational tool designed to help you master the methodology for calculating JFET-based amplifying devices and gain practical skills with minimal time investment.

  • Amplifier JFET Versions

    Demo Version
    Free of charge, but subject to the following functional limitations: the "detailed solution" feature with MS Word report generation is unavailable and is only accessible in the licensed version.
    Licensed Version
    To use the licensed version, you must purchase an activation code (license key). The activation code remains valid for two months.
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    Amplifier JFET System Requirements

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    The Amplifier BJT software is designed to run on Windows OS. The program uses an integrated text block to display calculation results, while Microsoft Word is employed to generate detailed step-by-step calculation reports.
    The supported versions of Windows OS and MS Word are listed below.

    Operating System (OS):
     Windows 7, 8, 10, 11
    Text Editor: 
    Microsoft Word 2007–2024 (for report generation)


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    Help & Resources

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    Amplifier JFET User Guide


    Instructional Videos on Software Operation


    Calculation of a JFET (Junction Field-Effect Transistor) Amplifier Stage


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  • Benefits of Amplifier JFET 

    • Database of 1,000 transistor models, including foreign and domestic (Soviet and Russian) manufacturers;
    • Detailed calculation reports in MS Word format;
    • Choice of circuit configurations: Common-Source (CS) and Common-Drain (CD);
    • Flexible configuration of all amplifier parameters;
    • Using the MathType equation editor, Amplifier JFET helps format your solution with minimal time investment;
    • Amplifier JFET generates reports in .docx format, compatible with many popular editors, including MS Word, OpenOffice, and Google Docs;
    • Amplifier JFET helps students prepare for lab reports, course projects, and exams in "Fundamentals of Electronics" courses.

    The amplifier stage calculation includes:


    • Plotting I-V characteristics of the selected FET model;
    • Operating point (Q-point) selection;
    • DC load line construction;
    • DC analysis and determination of component values.
    • AC analysis and determination of:  S, Ri, Rout, μ, Ge;
    • Frequency response calculation: fs, tu, td;
    • Calculation of key amplifier parameters:Ku, Ki, Kp, η.
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    Download and Activate Amplifier JFET

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    Download Amplifier JFET 


    Amplifier JFET Activation

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