Logic 1: Introduction Flashcards
Most natural quantities we see are _____ and vary continuously
Analog
These systems can generally handle higher power than digital systems
Analog
These systems can process, store, and transmit data more efficiently but can only assign discrete values to each point
Digital
Uses circuits that have two states, which are represented by two different voltage levels
Digital Electronics
Two types of voltage levels in digital electronics
HIGH and LOW
What do you call a single number in binary?
Bit
What does “bit” mean?
Binary Digit
What is the value of a voltage HIGH?
1
What is the value of a voltage LOW?
0
The branch of electronics that represent information in digital form
Digital Logic
Utilizes limited number of codes or digits in the representation of information
Digital Logic
What do you call unwanted electrical interference
Noise
Which are more affected by noise: Digital or Analog?
Analog
Change between the LOW and HIGH levels
Digital Waveforms
Is one that goes from a normally LOW logic level to a HIGH level and then back
Positive-Going Pulse
Are made up of a series of pulses
Digital Waveforms
Is one that goes from a normally HIGH logic level to a LOW level and then back
Negative-Going Pulse
A constant voltage value added to the pulse to shift its peak
DC Offset
Is the specified active pulse time
Pulse Width
Active when voltage is high
Active High Signal
Active when voltage is low
Active Low Signal
The graphical representation of logic levels with respect to time
Digital Waveform
What is another name for Digital Waveform
Pulse Waveform
Has a low voltage at 0 and peak value at 1
Positive Pulse
Has a high voltage at 0 and negative peak value at -1
Negative Pulse
The percentage of the active pulse in a period
Duty Cycle
The most common digital waveform
Square Wave
Has a 50% duty cycle
Square Wave
Time interval which the pulse repeats itself
Period
The rate at which the pulse repeats itself at a specified time
Frequency
Are composed of pulses that repeats in a fixed interval called the period
Periodic Pulse Waveforms
Is a basic timing signal that is an example of a periodic wave
Clock
Is used to show the relationship between two or more digital waveforms
Timing Diagrams
Can be used to directly observe diagrams like the timing diagram
Logic Analyzer
Two ways that data can be transmitted
Serial or Parallel
It is true if all input conditions are true
AND Logic
It is true only if one or more input conditions are true
OR Logic
Indicates the opposite condition
NOT Logic
A storage function in which it moves and stores data each time it is clocked
Shift Register
Are also called chips
ICs
Consists of several transistors, passive components fabricated in a single package
Integrated Circuit / Integrated Gate Circuit
What does DIP mean?
Dual In-Line Pins/Packages
States the the number of transistors in a chip doubles every two years
Moore’s Law
Is an integrated circuit that can be programmed in a laboratory to perform complex functions
Programmable Logic Device (PLD)
A gate array where the logic network can be programmed into the device after its manufacture
Field Programmable Gate Array (FPGA)
A high density PLD containing macro cells that are interconnected through a central Global Routing Pool
Complex Programmable Logic Device (CPLD)
Is a hardware description language used to model electronic systems
Verilog
Is a form of PLD that uses a combination of programmable AND array and a fixed OR array
Programmable Array Logic (PAL)
A periodic waveform used to synchronize actions
Clock
A logic circuit that performs a basic logic operations such as AND or OR
Gate
A category of digital integrated circuits having functions that cannot be altered
Fixed-function logic
A category of digital integrated circuits capable of being programmed to perform specified functions
Programmable Logic
