Introduction to Diodes in Electronic Circuits 1 - Lecture Slides | EEL 3304, Study notes of Electrical and Electronics Engineering

Download Introduction to Diodes in Electronic Circuits 1 - Lecture Slides | EEL 3304 and more Study notes Electrical and Electronics Engineering in PDF only on Docsity! 1 L9. Diodes • Review – Instantaneous signal, vD(t) – Graphical representation – Development of small-signal model • Effect of vd(t) • Reading – Chapter 3 (Diodes) Small-signal Example • Consider a dc power supply, V+ that is contaminated by a 60 Hz ac signal • Equivalent circuit: Given: R=10k, VDD=10V, Vs=1V 0.7V at 1mA, n=2 2 Small-signal Example • Step 1: Find DC solution • Step 2: Find value of small-signal parameter at DC solution • Step 3: Analyze small-signal equivalent circuit Given: R=10k, VDD=10V, Vs=1V 0.7V at 1mA, n=2 Small-signal Example • Step 3: Analyze small-signal equivalent circuit 5 Zener Diodes • Operation at reverse bias • Circuit symbol • I-V characteristic i v Zener Diodes • Parameters: • Equivalent circuit (piece-wise linear) 6 Summary • Small-signal example • Forward-biased diode as voltage regulator • Operation at reverse bias—Zener diodes