91.3.2. Polarity and Naming Conventions

In this case as I said that the input signal and output signal are say voltages. So, here we consider it is voltage here also it is voltage, so the signal here it is voltage and this is also voltage.

This chunk discusses a specific configuration of feedback systems where both the input and output signals are voltages. It is essential to understand that in this setup, both signals operate under the same unit, which is voltage, ensuring consistency throughout the feedback loop.

Think of it like two people writing down numbers in feet. If both are writing in feet, their measurements can be directly compared and added together, similar to how voltages work in this feedback configuration.

So, the sampler whenever we are sampling the signal, it should be parallel connection. So, we do have this is the output signal in fact, that is S to sense this voltage the input port of the feedback network it should be parallelly connected.

This chunk introduces the concept of a sampler and a mixer. The sampler connects parallelly to sense the voltage output. This is crucial because parallel connections allow the sampler to capture the voltage signal without altering it, ensuring the feedback system functions effectively.

Imagine you’re using a straw (sampler) to sip a drink (voltage) from a glass. If the straw is sitting beside the drink (parallel), you can take a sip without changing how much liquid is in the glass.

So, if I say that this is v this is + and this is ‒. So, v = v ‒ v. So, if you see carefully the polarity indicates that v = v ‒ v. In fact, that is what we are looking for S = S ‒ S.

This section explains the polarity of the signals involved in the feedback loop. It emphasizes that the determination of the output signal will depend on the difference between the input and feedback signals. Understanding this polarity is crucial as it influences whether the system operates with negative feedback.

Think of it like a seesaw where one side represents the output and the other represents the input. The seesaw moves up or down based on which side has more weight, illustrating how the feedback affects the overall signal.

As you can see here we are summarizing the naming conventions again it may vary from textbook to textbook; but you should not get confused with different naming. If you see here the feedback signal it is going through this path.

This portion discusses the importance of naming conventions in feedback systems. Different texts may use varying terms, but understanding these terminologies is vital for recognizing what kind of feedback setup is being discussed. It refers specifically to how feedback signals are categorized based on their paths - sampling and mixing.

Like using different phrases for the same game, such as 'soccer' in some countries and 'football' in others. Each term refers to the same activity, and knowing these differences helps in communicating better about the game.

So, in summary this configuration typically or most of the time we refer as shunt series feedback. So, this is shunt and this is where series; shunt-series feedback or you may say that this is voltage and then series feedback.

The final chunk summarizes the feedback system configuration. It distinguishes the term 'shunt series feedback,' which refers to how the signals are sampled and mixed, reinforcing that the type of feedback system can be categorized based on these connections.

Consider how different layers of a cake (feedback configurations) are arranged. Just as you might call a cake with cream between layers a 'layered cream cake,' in the same way, you’re identifying various configurations using distinct terminology based on how the components interact.

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