# Difference between revisions of "TF EIMLab9 Writeup"

Lab 9: Diode Circuits

# Clipping Circuit

1.) Construct the circuit shown below using a silicon diode.

Using Diode 1N5230B

And

R= 9.6k

2.) Use a sine wave generator to drive the circuit so where V and = 1kHz. (20 pnts)

3.)Based on your observations using a oscilloscope, sketch the voltages and as a function of time.

Outoput for several input voltages near the bias point

 V_{in} = 0.5V V_{in} = 0.6 V V_{in} = 0.75 V V_{in} = 0.8 V V_{in} = 1.0 V

4.)Do another sketch for = 1.0 V and another for 10.0 V (DONT LET ANY SMOKE OUT!). (20 pnts)

 V_{in} = 1 V V_{in} = 10 V

# Differentiating Circuit with clipping

1.)Construct the circuit below.

2.)Select and such that the current from the +5V DC source is less than 1.0 mA and the DC voltage at is 3 V when there is no input pulse.

3.)Select a capacitor and a pulse width to form a differentiating circuit for the pulse from the signal generator. Hint: .

4.)plot and as a function of time using your scope observations. (20 pnts)

 Signal setup RC fall time

5.) Now add the diode circuit from part 1 to prevent from rising above +5 V. Sketch the new circuit below.

6.)plot and as a function of time with the diode circuit you added using your scope observations. (the diode should clip off positive spikes)(20 pnts)

Notice the output pulse does not increase when V_{in} is increased

 V_{in} = 4 V V_{in} = 7 V V_{in} =9V

# Questions

1. Explain your results in parts 1 & 2 in terms of the diode turn-on voltage. (20 pnts)