Bandwidth Groupdelay and Peaking — Lesson 4

This lesson covers the principles and design of wideband amplifiers, focusing on the trade-off between bandwidth, group delay, and peaking. It discusses the use of different components such as resistors, capacitors, and inductors in the design of these amplifiers. The lesson also explains the concept of T-coil and shunt series feedback in enhancing the bandwidth. It further elaborates on the impact of increasing the order of the load on the delay and bandwidth of the amplifier. For instance, using a higher order load can increase the bandwidth.

Video Highlights

00:24 - Introduction and recap of previous lesson
21:37 - Plotting magnitude response of the functions
34:00 - different types of circuit to improve the bandwidth
48:27 - Introduction to the T-coil circuit and how it can improve the bandwidth
52:03 - Shunt series amplifier and how it can improve speed

Key Takeaways

- Wideband amplifiers can be designed using different components such as resistors, capacitors, and inductors.
- The trade-off between bandwidth, group delay, and peaking is a crucial aspect of wideband amplifier design.
- Increasing the order of the load can enhance the bandwidth but results in a higher delay.
- The use of T-coil and shunt series feedback can significantly improve the bandwidth.
- The bandwidth of an amplifier can be further enhanced by sacrificing some gain, a principle used in shunt series feedback.