Integrated Electronics Analog and Digital Circuits and Systems
Digital Design: Analog vs Digital Circuits
-
Upload
atush-jain -
Category
Education
-
view
83 -
download
2
Transcript of Digital Design: Analog vs Digital Circuits
Chapter 1
BASIC DIGITAL CONCEPTS
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 2
Lesson 2
Analog vs. Digital Circuits
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 3
Outline
•• Analog CircuitAnalog Circuit• Digital Circuit
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 4
Analog circuit Features• More close to physical system and
physical values• Capabilities of representing
directly a physical value. For example, the value of temperature, wind, speed or rotation by a corresponding voltage or current or frequency or phase angle.
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 5
Analog circuit Feature• Faster speed due to lesser number
of components needed to represent a physical value
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 6
Analog circuit Disadvantage• Noise in voltage or current does
matter because an output or input is measured in terms of a value of voltage or current or frequency or phase.
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 7
Analog circuit Disadvantage• Logical values are reflected by a
complex analog to digital conversion circuit
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 8
Analog circuit Disadvantage• A circuit shows the deviation with
time due to change in circuit temperature or changes in physical condition
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 9
Outline
• Analog Circuit• Digital Circuit
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 10
Digital circuit Features• More close to logic and number
systems and a logic state has a definiteness and thus the circuit inputs and outputs have preciseness and reliability
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 11
Digital circuit Feature• Capabilities of logical decisions
and arithmetic, logic and Boolean operations
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 12
Digital circuit Feature• Noise in voltage or current does not
matter because an output or input is measured in terms of its logic state(s), not in terms of a value of the Voltage or current or frequency
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 13
Digital circuit Disadvantage• The circuits have high
complexities. To represent a big decimal number, the large number of components needed.
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 14
Digital circuit Disadvantage• Physical values are reflected by a
complex digital to analog conversion circuit
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 15
Digital circuit Disadvantage• Slower speed due to greater
number of components needed to represent a state. For example, a bipolar junction transistor as inverter will act faster than a circuit in TTL inverter.
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 16
Summary
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 17
• Digital circuits are circuits for logic and number systems and a logic state has a definiteness and thus the circuit inputs and outputs have preciseness and reliability
•
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 18
• Analog circuits are affected by noise and surrounding physical conditions changes
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 19
End of Lesson 2 on
Analog vs. Digital Circuits
Ch01L1-"Digital Principles and Design", Raj Kamal, Pearson Education, 2006 20
THANK YOU