Chapter 15

Using Diodes

Use diode models to describe pn junction diodes within MOS and bipolar integrated circuit environments and discrete devices. You can use four types of models and a wide range of parameters to model standard junction diodes:

• Zener diodes
• Silicon diffused junction diodes
• Schottky barrier diodes
• Nonvolatile memory diodes (tunneling current)

Diode model types include the junction diode model and the Fowler-Nordheim model. The junction diode model has two variations: geometric and nongeometric.

This chapter provides an overview of model parameters and scaling effects for the geometric and nongeometric junction diodes. It describes:

• Understanding the Diode Types
• Using Diode Model Statements
• Specifying Junction Diode Models
• Determining Temperature Effects on Junction Diodes
• Using Junction Diode Equations
• Using the Junction Cap Model
• Using the Fowler-Nordheim Diode
• Converting National Semiconductor Models