Lab 9 TF EIM

Lab 9: Diode Circuits

Clipping Circuit

1. Construct the circuit shown below.
2. Use a 1 kHz sine wave generator to drive the circuit so $V_a = V_0 cos(2 \pi \nu t)$ where $V_0 = 0.1$ V and $\nu$ = 1kHz.
3. Based on your observations using a scope, sketch the voltage at points A & B as a function of time.
4. Do another sketch for$V_0$ = 1.0 V and another for 10.0 V.

Differentiating Circuit with clipping

1. Construct the circuit below.
2. Select $R_1$ and $R_2$ such that the current from the +5V DC source is 1.0 mA and the DC voltage at $V_b$ is 3 V.
3. Select a capacitor $(C_1)$ to form a differentiating circuit for the pulse from the signal generator. Hint: $R_{12}C_1 \ll \tau$.
4. plot $V_A$ and $V_B$ as a function of time using your scope observations.
5. Now add the diode circuit from part 1 to prevent V_B from rising above +5 V.
6. plot $V_A$ and $V_B$ as a function of time with the diode circuit you added using your scope observations.

Questions

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

Forest_Electronic_Instrumentation_and_Measurement