Microsoft Word - Digital Logic Design v_4_6a

 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)

Digital

Analog