97.3. Practical Circuit Application

According, to our overall flow we are in a week-10 and we are in module-9. And we have discussed about basic four configurations feedback configurations and their characteristic we also have discussed about effect of feedback on a frequency response of an amplifier. And today’s discussion it is more like continuation of the basic four configurations and specifically how those configurations can be deployed on practical circuits.

In this section, the speaker summarizes past discussions on feedback configurations used in amplifiers. Feedback configurations are crucial as they can improve the performance of amplifiers by stabilizing gains and responses. The focus is now shifting toward practical circuit applications of these theoretical configurations. The context is set within an academic module, indicating a structured approach to learning.

Think about feedback configurations like the GPS in a car. Just as GPS provides real-time updates to adjust your route and keep your journey on track, feedback configurations adjust the performance of amplifiers to ensure they operate within desired parameters.

So, we will be talking about is primarily BJT. And then also we will be talking about deployment of feedback system on op-amp circuit. So, we can say that we are at module levels as well as at subsystem levels. ...we shall see how we can deploy or how do we decide different feedback configuration in BJT circuits BJT amplifiers.

This chunk focuses on the specific types of feedback configurations that will be discussed in BJT and operational amplifier (op-amp) circuits. The configurations mentioned include voltage sampling with shunt feedback, current sampling with series mixing, and voltage series feedback. Understanding these configurations is essential for applying feedback in practical circuits effectively.

Consider a coach in a sports team who adjusts the game strategy based on real-time performance by observing players. Similarly, these feedback configurations adjust amplifier performance based on the input and output conditions.

So, whatever the configuration we do consider essentially this is the formula by which we can say that A it is getting reduced. ... we are expecting that this current gain it will get reduced.

Here, the speaker explains how applying feedback changes the gain (A) of an amplifier. This reduction is beneficial as it helps in stabilizing and controlling the amplifier's performance. Each feedback configuration affects the various types of gain (current, voltage, etc.) differently, and understanding these effects is key to choosing the correct configuration.

Imagine a dimmer switch for lights. It adjusts the brightness smoothly instead of abrupt changes. Similarly, feedback in amplifiers ensures that the gains can be finely tuned to avoid sudden performance fluctuations.

So, we can say that A that corresponding A of the feedback system if I call A. ... we should be selecting the corresponding configuration here.

This portion emphasizes the importance of understanding which feedback configuration to choose based on the desired output characteristics. The choice depends on whether the goal is to stabilize voltage gain, current gain, or certain resistance values. The right configuration facilitates the specific amplification objectives of a circuit.

Picture a chef choosing ingredients for a recipe. The selection depends on the desired outcome of the dish, akin to how engineers select feedback configurations based on desired circuit performance.