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Draw neat block diag of delta modulator Transmitter and Receiver and explain it working.
1 Answer
written 5.4 years ago by |
Delta Modulator Transmitter:
Operation: X(t) – i/p signal to comparator
X’(t) – quantized version of x(t)
In comparator,↑ high if x(t) > x’(t) and goes low ↓ if x(t) < x’(t). Thus the comparator o/p os either 1 or 0.
The sample and hold circuit will hold this level (0/1) for the entire clock cycle period.
The o/p of sample and hold is transmitted as o/p of DM system. Also, one bit per clock cycle is sent. Thus bit rate and b.w is reduced.
The sig is used to decide the mode of operation of an up/down counter, the counter o/p increments by 1 if $S_o (t)=1$ and it decrements by 1 if $S_o (t)=0,$ at the falling edge of each clock pulse.
Delta Modulator Receiver
Advantages:
Disadvantages: