Zener Diode Dynamic (Incremental) Resistance (r_z = ΔV_Z / ΔI_Z)
jee-mainjee-advanced
r_z = ΔV_Z / ΔI_Z
What each symbol means
| Symbol | What it stands for |
|---|---|
| r_z | Small-signal / incremental resistance in breakdown region (Ω) |
| ΔI_Z | Corresponding change in Zener current (A) |
| ΔV_Z | Small change in Zener voltage (V) |
When to use this
Operated in breakdown (regulating region); small signal around a DC bias. Real Zener also has knee — model is linearization.