Experiment No: 1 Page: 1 LINEAR WAVE SHAPING Aim : Design a RC LPF and HPF at various time constants and verify the responses for Square wave input (choose C = 0.1f, V i = 4 V P-P , f = 10 K Hz). Apparatus : 1. CRO 2. Signal Generator 3. Bread board 4. Capacitor (0.1f) 5. Resistors (100, 1K, 10 K) 6. Connecting wires. Circuit Diagram : HPF : Design / Calculations : a) RC = T Given T = 1/10KHz = 0.1 mSec R = 0.1x 10 -3 / 0.1f = 1 Kohms V 1 = V / (1 + e -T/2RC ) = 2.49 V Lab Incharge HOD
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Experiment No: 1 Page: 1
LINEAR WAVE SHAPING
Aim : Design a RC LPF and HPF at various time constants and verify the responses for Square wave input (choose C = 0.1f, Vi = 4 VP-P, f = 10 K Hz).
Apparatus : 1. CRO2. Signal Generator3. Bread board4. Capacitor (0.1f)5. Resistors (100, 1K, 10 K)6. Connecting wires.
Circuit Diagram:
HPF :
Design / Calculations:
a) RC = TGiven T = 1/10KHz = 0.1 mSec
R = 0.1x 10-3 / 0.1f = 1 Kohms
V1 = V / (1 + e-T/2RC) = 2.49 V
= (2.49 – 1.51)/2 = 49%)
Lab Incharge HOD
Experiment No: 1 Page: 2
T1 = T2 = T/2
b) RC >> T Choose RC = 10T = 1 mSec
R =
The O/P waveform will be identical to I/P
T1 = T2 = T/2
c) RC << T RC = 0.1 T
R =
LPF:
Lab Incharge HOD
Experiment No: 1 Page: 3
a) RC = T
C = 0.1f, R = 1K
V1 = -0.49 V
b) RC >> T
Lab Incharge HOD
Experiment No: 1 Page: 4
R = 10 K, C = 0.1 f
V1= 0.05v
c) RC << TR = 100,
C = 0.1 f
Lab Incharge HOD
Experiment No: 1 Page: 5
Note:
Low Pass Filter allows the DC component of I/P signal and High Pass Filter block the DC component of I/P Signal.
Procedure:
1. Connect the circuit as shown in figure (LPF / HPF)2. Apply the Square wave input to this circuit (Vi = 4 VP-P, f = 10KHz)3. Observe the output waveform for (a) RC = T, (b) RC>>T, (c) RC>>T4. Verify the values with theoretical calculations
Precautions:Use two CRO probes and observe I/P & O/P waveforms simultaneously by
putting CRO on DC modes.
Result:LPF and HPF are designed at various time constants and the responses for
square wave input is observed & hence plotted.
Lab Incharge HOD
Experiment No: 1 Page: 6
Questions :
1. When HP-RC circuit is used as Differentiator?
2. Draw the responses of HPF to step, pulse, ramp inputs?
3. Draw the responses of LPF to step, pulse, ramp inputs?
4. Define % tilt and rise time?
5. When LP-RC circuit is used as integrator?
6. Why noise immunity is more in integrator than differentiator?
7. Why HPF blocks the DC signal?
8. Define 1db?
9. What is meant by linear wave shaping?
10. Write the formula for rise time tr?
Lab Incharge HOD
Related Documents
