Ep 12. Electronic Feedback

The show Understanding Modern Electronics follows the journey of two hosts, both experts in electronics, exploring the world of modern electronic technologies. In season 1 episode 12, titled Electronic Feedback, the hosts delve into the topic of feedback systems in electronic devices and circuits.

The episode starts with a brief introduction to the concept of feedback in electronics. The hosts explain how feedback is used in various electronic systems to improve their performance and stability. They go on to explain how feedback can be both positive (amplifying) and negative (dampening) and how it can be applied to different types of electronic circuits.

The hosts then move on to discuss the applications of feedback in various electronic devices. They explain how feedback systems are used in audio amplifiers, motor controllers, and even in power supplies to regulate voltage and current. They go on to explain how feedback is used in digital circuits to improve the timing and reliability of signals.

Next, the hosts explain the different types of feedback systems in detail. They explain how open-loop and closed-loop feedback systems work and the advantages and disadvantages of each. They also explain how feedback can be applied locally or globally in a circuit and the effects this has on its performance.

The hosts then move on to demonstrate a feedback system using an op-amp circuit. They explain how the op-amp is used in a negative feedback configuration to create a voltage follower, which is used to buffer signals and reduce noise. They go on to explain how the same op-amp can be used in a positive feedback configuration to create a comparator, which is used to detect when a signal crosses a threshold.

Finally, the hosts explain the limitations of feedback systems in electronics. They explain how feedback can introduce instability, oscillations, and noise in a circuit if not properly designed and implemented. They also explain how feedback can limit the bandwidth and response time of a circuit, which can be a problem in high-speed applications.

In conclusion, the episode Electronic Feedback provides a comprehensive overview of the concept of feedback in electronics and its applications in various electronic systems. The hosts provide clear and concise explanations, backed up by practical demonstrations, making the topic easy to understand even for non-experts. The episode is a must-watch for anyone interested in electronics and technology.