PPT learning lesson, PowerPoint file with a detailed explanation of negative feedback amplification circuits. The document discusses the amplification factor of negative feedback amplification circuits, as well as the concept of open and closed loop systems in amplification circuits. The relationship between the input and output signals, as well as the direction of signal transmission, is also explored. The general expression for negative feedback amplification circuits, as well as the calculation of the loop gain, is provided. The concept of deep negative feedback and its measurement in amplification circuits is discussed. Additionally, the conditions for deep and shallow negative feedback are examined, along with the implications for the amplification circuit. The presentation also delves into the impact of specific values of loop gain on the feedback depth, and the relationship between the feedback depth and the amplification factor. This comprehensive study of negative feedback amplification circuits provides a thorough understanding of the principles and operation of these circuits, making it an essential resource for students and professionals in the field of electrical engineering and circuit design.