What This Document Is
This is a detailed laboratory experiment guide for Microelectronic Devices and Circuits (ELENG 105) at UC Berkeley, specifically focusing on multistage amplifiers. It provides a framework for understanding how individual amplifier stages interact when combined, building upon previously learned concepts of single-stage amplifier characteristics. The guide outlines procedures for building, analyzing, and simulating circuits to explore the performance enhancements achieved through cascading amplifier stages.
Why This Document Matters
This resource is essential for students enrolled in an intermediate-level microelectronics course. It’s particularly valuable when you’re ready to move beyond analyzing single amplifiers and begin designing more complex systems. This guide will help you solidify your understanding of amplifier design principles and prepare you for more advanced circuit analysis and design challenges. It’s best used *during* a lab session and as a reference for completing a corresponding lab report.
Topics Covered
* Cascode Amplifier Analysis
* Interstage Loading Effects
* Small-Signal Analysis of Multistage Systems
* Gain, Input Resistance, and Output Resistance Calculations
* DC Bias Point Determination and Stabilization
* SPICE Simulation for Circuit Verification
* Coupling Capacitor Functionality
* Common Emitter and Common Base Configurations in Cascade
What This Document Provides
* Detailed circuit diagrams for both the cascode amplifier and cascaded stages.
* Guidance on setting up circuits on a lab chip.
* Instructions for performing DC and AC measurements using an oscilloscope.
* A framework for comparing theoretical calculations with experimental results.
* Suggestions for SPICE analysis to validate design choices.
* Discussion points to aid in understanding the interaction between amplifier stages.
* Information on potential pitfalls and troubleshooting tips for common issues.