19. Linearization of non - linear circuit containing BJT (Contd.)
The chapter focuses on the linearization of non-linear circuits containing BJTs, detailing the process of creating small signal equivalent circuits. It emphasizes the significance of understanding key parameters like transconductance, output conductance, and base-emitter resistance within these circuits. The discussions illustrate how these concepts simplify the analysis and design of amplifiers, allowing engineers to operate in the linear region for optimal performance.
Enroll to start learning
You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- Linearization of non-linear circuits is crucial for obtaining small signal equivalent circuits.
- Key parameters in BJTs include transconductance, output conductance, and base-emitter resistance, which depend on the operating point.
- The small signal equivalent circuit simplifies analysis and enhances the design of analog circuits.
Key Concepts
- -- Transconductance (g)
- A parameter representing the relationship between the collector current and the base to emitter voltage, defined by the change in collector current with respect to the change in base-emitter voltage.
- -- Small signal equivalent circuit
- An equivalent model representing the linearized behavior of non-linear circuits under small signal conditions, allowing for simplified analysis.
- -- Output conductance (g_o)
- The change in collector current in response to a change in the collector-emitter voltage, often providing insight into the transistor's linearity.
- -- Base to emitter resistance (r_π)
- The resistance seen looking into the base-emitter junction of a BJT, which affects the input characteristics of the transistor.
Additional Learning Materials
Supplementary resources to enhance your learning experience.