電子學(二)

7/6開始上課

Course Intro & Device: Review Overview of grading policy and intensive schedule; Quick review of BJT and MOSFET physics, large-signal and small-signal equivalent models (Hybrid-π and T-models). MOSFET Single-Stage Amplifiers: Common-Source (CS), Common-Drain (CD), and Common-Gate (CG) amplifiers; Biasing design, small-signal voltage gain, and input/output impedance derivations.

BJT Single-Stage Topologies: Common-Emitter (CE), Common-Collector (CC), and Common-Base (CB) configurations; Amplifiers with source/emitter degeneration and the Resistance Reflection Theorem. Active Loads & Multistage Amps: Comparison between resistor loads and IC Active Loads; Circuit analysis of active-load CS amplifiers; Topologies of multistage cascaded amplifiers and loading effects.

Cascode Amplifier Design: Circuit structures of MOSFET/BJT Cascode Amplifiers; Analysis of high output impedance characteristics, voltage gain expansion, and the shielding effect. Current Sources & Mirrors: Circuit structures and output resistance analysis of basic current mirrors, Wilson current mirrors, and cascode current mirrors; Current steering concepts.

Midterm Review & Exercises: Comprehensive consolidation of single-stage, multistage, cascode amplifiers, and current mirrors; Step-by-step mathematical problem solving. Midterm Examination: [Midterm Exam (2 hours) + Post-Exam Review & Key Concept Discussion (2 hours)].

Differential Amplifiers Intro: Core concepts of Differential Amplifiers; DC biasing, large-signal, and small-signal operation modes of MOS and BJT differential pairs. Differential Gain & CMRR: Differential amplifiers with active loads; Differential-to-single-ended output mechanisms; Investigation of circuit nonidealities including DC offsets and Input Offset Voltage.

Active-Load Diff Pairs & Offsets: Differential amplifiers with active loads; Differential-to-single-ended output mechanisms; Investigation of circuit nonidealities including DC offsets and Input Offset Voltage. Frequency Response Basics: Bode plot fundamentals; Low-frequency response analysis due to external coupling and bypass capacitors; Miller’s Theorem and its applications.

High-Freq Response: Single-Stage: Transistor internal capacitances (Cπ,Cμ,Cgs,Cgd) and high-frequency models; High-frequency cutoff analysis of CS/CE, CG/CB, and CD/CC amplifiers High-Freq Response: Multistage: High-frequency response analysis of multistage cascaded and cascode structures; Application of the Open-Circuit Time-Constants (OCT) method for upper 3-dB frequency (fH) estimation.

Feedback Amps & Stability: Advantages of feedback; Identification and impedance variations of the four feedback topologies; Loop gain (Aβ), stability criteria via Bode plots (Gain/Phase Margin), and Frequency Compensation. Final Examination & Wrap-up: [Comprehensive Final Exam (2.5 hours) focused on Ch. 8, 9, 10 + Concluding Remarks & Feedback (1.5 hours)].