Silicon diode threshold model

Tags

• diodos
• Semiconductors and diodes
• Electronics
• physics
• Electronics formula
• physics formula

Detail

Explore the idea

Variables

• $v,V_F,V_Z,V_T$V
• $I,I_s$A
• $n$ideality factor
• $E_g$eV
• $f,R,C$Hz, Ω, F.

Conditions

• Stated model (Shockley, threshold or Zener); temperature sits in VT.

Intuitive explanation

For “Silicon diode threshold model”: the diode conducts strongly past threshold; the rectifier clips or folds the sinusoid.

Worked example

Common mistakes

• using 0.7 V in reverse
• forgetting capacitor ripple
• mixing half-wave with full-wave in Vavg

Frequently asked questions

What must be checked before using the Silicon diode threshold model relation?

Choose the model (threshold, Shockley or Zener) and the conduction interval.

Also known as

• Shockley diode, 0.7 V threshold, rectifier, ripple, Zener

Related topics

• Diodes and rectification

Conventions

• V, A or eV

Related formulas

• Related

  Thermal voltage

  $$V_T=\frac{kT}{q}$$
  Open formulaOpen in section

• Related

  Half-wave rectifier

  $$V_{\mathrm{med}}=\frac{V_p}{\pi}$$
  Open formulaOpen in section

• Related

  Average of a rectified sine

  $$V_{\mathrm{med}}=\frac{2V_p}{\pi}$$
  Open formulaOpen in section

• Related

  Instantaneous power

  $$p(t)=v(t)i(t)$$
  Open formulaOpen in section