Lab 8 TF EIM

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Lab 8 The Diode Objective: Measure the current-voltage curve of a silicon diode.

Reverse current

  1. Construct the circuit below using a DC power supply, a diode.
  2. attach an Oscilloscope set to 1M[math]\Omega[/math] input impedence as shown in the circuit diagram. The oscilloscope will serve as a Resistor to measure the voltage across the diode and calculate the current.
  3. Measure the diode reverse current [math]I_r[/math] as a function of the DC supply voltage.

Forward Current

  1. now swap the diode dirction and repeat the measurement in the previous section.

Questions

  1. The reverse biased diode acts like a constant ____________.
  2. The forward biased diode has a very __________ resistance. A reverse biased diode has a very ____________ resistance.
  3. The approximate DC forward resistance for diode #___________ is _________ when the forward current is _______________.
  4. The approximate DC reverse resistance for diode #___________ is _________ when the forward current is _______________.
  1. The silicon diode #___________ has an approximate turn on voltage of ___________.


Forest_Electronic_Instrumentation_and_Measurement