1.2 Analog Versus Digital

1
1.2 Analog Versus Digital

• Analog signals time-varying signals that can
  take on any value across a continuous range of
  voltage, current, or other metric.

???, ???
Return
2
1.2 Analog Versus Digital

• Digital signals at anytime,only one of two
  discrete values, which we call 0 and 1. ( or
  Low and High, False and True, negated and
  asserted, or whatever)

??
??
Digital systems must be circuits to
process binary digits 0s and 1s according to
the definition of digital signals. Are there any
benefits?
Return
3
1.2 Analog Versus Digital

• How to convert analog signals to digital
  signals? (A/D Converter)

Return
4
1.2 Analog Versus Digital

• Examples of Digital Systems
• Still pictures. JPEG, BMP, GIF

• Video recordings. DVD (Digital Versatile Disk),
  VCD (Video Compact Disk) , MPEG, AVI

• Audio recordings . CD (Compact Disc), WAV

• Automobile carburetors. Microprocessor is
  embedded. It can determine how to control the
  flow of fuel and oxygen to the engine.

???

• The telephone system. Digital COs PBXs.

• Traffic lights. Controllers use microprocessors.

Return
5
1.2 Analog Versus Digital

• The Reasons that Digital Circuits Over Analog
  Ones
• Reproducibility of results

• Ease of design

• Flexibility and functionality

• Programmability

• Speed

• Economy

• Steadily advancing technology

Return