ELECTRONICS HOMEWORK

1. Design an eight-stage ladder network digital-to-analog converter (DAC).

Use 2.5 KΩ and 50 KΩ resistors. Draw the sketch of this DAC.

2. Sketch the circuit of a 555 timer IC connected as an astable multi-vibrator

for operation as 500 KHz, Compute the value of capacitor C needed using RA =

RB = 20 KΩ.

3. Determine the voltage gain, input, and output impedance with feedback

for voltage-series feedback having A = -150, Ri = 25 KΩ and Ro = 50 KΩ for

feedback of β = - 0.2.

4. Explain the operation of an LCD (Liquid Crystal Display) and compare

it: with the LED.

5. Explain the operation of a solar cell. How does it differ from a

photoconductive cell?

6. What is a relaxation oscillator? Explain its operation and applications.

7. Draw the sketch of an op-amp based voltage subtractor and determine the

output voltage V0 for Rf = 1MΩ, R1 = 50 KΩ, R2 = 100 KΩ, and R3 = 400 KΩ.