Example of analog and digital representations of human Heart Beat:
Based on the definition of a digital (2-valued) system, what are some examples where a digital
system could apply? What are the variables and on/off or high/low states?
Example: Describe the input and output of a traffic intersection in digital form.
Solution:
Car’s presence at an intersection:
(Car PresentMagnitude is 1, No Car PresentMagnitude is 0)
Status of Traffic Lights:
(Red-on 1, Red-off 0)
Extension: draw a typical Intersection and label the output and input in digital form.
t
V
Vmax
Vmin
H (>Vmax)
L (<Vmin)
V
t
Analog to
Digital
Converter
(ADC)
Digital to
Analog
Converter
(DAC)