Shockley equation

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 “Shockley equation”: 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 Shockley equation 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

  Diode bias voltage

  $$V_D=V_A-V_K$$
  Open formulaOpen in section

• Related

  Thermal voltage

  $$V_T=\frac{kT}{q}$$
  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