Class 18 Digital Transmission and Digital Meets Analog
Class 18 Digital Transmission and Digital Meets Analog
WAVES
The EM spectrum
The visible EM spectrum UV IR
How to produce EM radiation
How to receive EM radiation
How to encode information
How to encode information
How to encode information
Digital Transmission
Example:
Types of digital transmission
Parallel
Synchronous vs asynchronous?
Typical handshake
Serial
Serial communication
Modem Modulate - Demodulate
ASCII (American Standard Communication Interface)
Analog versus Digital
Digital resolution
The number of “bits” of resolution
What if we want an analog voltage from digital? Digital-Analog converter (DAC)
How to sum voltages? the operational amplifier (“op amp”)
How to sum voltages using an op amp
How to get digital from analog Analog-Digital converter (ADC)
Advantages of ADCs & DACs
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