Lab 8 TF EIM

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