Virtual Labs
IIT Kharagpur
Study of different types of companding Technique
Instructions
Observe the block diagram
Select the amplitide(A) of the input sine wave signal(x(t)).
Select the frequency of the signal(f
m
) for the input signal(x(t)).
Select the sampling frequency of the signal(f
s
).
Click on the "Channel 1" buttton to observe the input signal x(t) on graph
Click on the "Channel 2" to buttton observe the sampled output signal y(n) on graph
Click on the "Channel 3" to buttton observe the quantisation output signal y(n) on graph
Click on the "Dual" to observe the input signal and output signal on graph
Change the values of A, f
m
, and f
s
to observe the variation in the input and output signals.
Hover on the graph to observe the value of the x(t) and y(n) at that instatnt of time T.
Save the graph if you are done with your experiment.
Note:
Make sure always input signal amplitude(A) >0 v
Make sure always input signal frequency(f
m
and f
s
) >0 Hz
To change the values just scroll by hovering on the knob.
Make sure that you kept equal time/div in the "Channel 1" and "Channel 2".
Block Daigram
Signal
Generator
Virtual
Scope
Sampling
Block
Compressor
Block
Quantization
Block
Expander
Block
Power
Circuit OFF
Function Generator Controls
V
i
=
V
f
m
=
kHz
f
s
=
kHz
n =
bits
A
law
=
μ
law
=
Oscilloscope Controls
Channel 1
Channel 2
Channel 3
Dual
Channel 1
V
c1
=
V/div
Time =
(ms)/div
Position
P
X
=
P
Y
=
Channel 2
V
c2
=
V/div
Time =
(ms)/div
Position
P
X
=
P
Y
=
