Threshold voltage

Threshold voltage is at one Diode lying close electrical tension, with by the diode the flowing River noticeably more largely than that Cutoff-current becomes. The threshold voltage of one GermaniumDiode is about 0,35 V, the one SiliconDiode with 0,7 V.

The current flow around the range of the threshold voltage around can being following approximated like.

<math>I_d = I_s (e^{U_d/U_t}-1), \quad U_t = k te \approx 26mV with 300 K </math>

Is

• I_D: Diode stream
• I_s: Cutoff-current
• U_D: Diode tension
• U_t: Temperature stress
• e: Elementary charge
• k: Boltzmannkonstante
• T: Absolute one Temperature

See also: Breakdown voltage, Electronics