This document discusses combinational logic and mixed logic design. It begins by defining combinational circuits as those whose outputs are determined immediately by the current input combination, without any internal storage. The document then presents an example of designing a 9-input odd function hierarchically using 3-input odd functions. Mixed logic design is introduced to allow implementing combinational logic using only NAND gates, only NOR gates, or both. DeMorgan's laws are used to convert gate types by adding or removing bubbles on the inputs. Several examples showcase designing logic circuits using only NAND gates or only NOR gates.
Design and minimization of reversible programmable logic arrays and its reali...Sajib Mitra
Reversible computing dissipates zero energy in terms of information loss at input and also it can detect error of circuit by keeping unique input-output mapping. In this paper, we have proposed a cost effective design of Reversible Programmable Logic Arrays (RPLAs) which is able to realize multi-output ESOP (Exclusive-OR Sum-Of-Product) functions by using a cost effective 3×3 reversible gate, called MG (MUX Gate). Also a new algorithm has been proposed for the calculation of critical path delay of reversible PLAs. The minimization processes consist of algorithms for ordering of output functions followed by the ordering of products. Five lower bounds on the numbers of gates, garbage and quantum costs of reversible PLAs are also proposed. Finally, we have compared the efficiency of proposed design with the existing one by providing benchmark functions analysis. The experimental results show that the proposed design outperforms the existing one in terms of numbers of gates, garbage, quantum costs and delay.
Design and minimization of reversible programmable logic arrays and its reali...Sajib Mitra
Reversible computing dissipates zero energy in terms of information loss at input and also it can detect error of circuit by keeping unique input-output mapping. In this paper, we have proposed a cost effective design of Reversible Programmable Logic Arrays (RPLAs) which is able to realize multi-output ESOP (Exclusive-OR Sum-Of-Product) functions by using a cost effective 3×3 reversible gate, called MG (MUX Gate). Also a new algorithm has been proposed for the calculation of critical path delay of reversible PLAs. The minimization processes consist of algorithms for ordering of output functions followed by the ordering of products. Five lower bounds on the numbers of gates, garbage and quantum costs of reversible PLAs are also proposed. Finally, we have compared the efficiency of proposed design with the existing one by providing benchmark functions analysis. The experimental results show that the proposed design outperforms the existing one in terms of numbers of gates, garbage, quantum costs and delay.
Introduction to combinational logic is here. We discuss analysis procedures and design procedures in this slide set. Several adders, multiplexers, encoder and decoder are discussed.
Introduction to combinational logic is here. We discuss analysis procedures and design procedures in this slide set. Several adders, multiplexers, encoder and decoder are discussed.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Cost Efficient Design of Reversible Adder Circuits for Low Power ApplicationsVIT-AP University
A large amount of research is currently going on in the field
of reversible logic, which have low heat dissipation, low
power consumption, which is the main factor to apply
reversible in digital VLSI circuit design.This paper introduces
reversible gate named as ‘Inventive0 gate’. The novel gate is
synthesis the efficient adder modules with minimum garbage
output and gate count. The Inventive0 gate capable of
implementing a 4-bit ripple carry adder and carry skip adders.
It is presented that Inventive0 gate is much more efficient and
optimized approach as compared to their existing design, in
terms of gate count, garbage outputs and constant inputs. In
addition, some popular available reversible gates are
implemented in the MOS transistor design the implementation
kept in mind for minimum MOS transistor count and are
completely reversible in behaviour more precise forward and
backward computation. Lesser architectural complexity show
that the novel designs are compact, fast as well as low power.
Implementation of Reversable Logic Based Design using Submicron TechnologySai Viswanath
Reversible logic has emerged as a computing paradigm having application in low power CMOS, quantum and optical computing. Design of reversible logic gate is reversible operation, when we say reversible it performing computation in such a way that any previous state can be reconstructed at given a description of the current state. The classical set of gates such as AND, OR, and XOR are not reversible.
This presentation is a design of reversible logic gate used for reversible operation. When we say reversible computing, we mean performing computation in such a way that any previous state of the computation can always be reconstructed given a description of the current state. The classical set of gates such as AND, OR, and EXOR are not reversible. This paper also includes simulation results of forward & backward computation of reversible FREDKIN gate and TSG gate.
A separately excited dc motor is driven from a 240v, 50HZ supply via a HC
SCR-bridge with a fly-wheel diode. The motor has an armature resistance
1Ω, an armature voltage constant Kv of 0.8 V. s/rad. The field current is
constant. Assume steady armature current. Determine the armature current
and torque for 1600 rpm and a firing angle delay of a) 30° b) 60
Ec2203 digital electronics questions anna university by www.annaunivedu.organnaunivedu
EC2203 Digital Electronics Anna University Important Questions for 3rd Semester ECE , EC2203 Digital Electronics Important Questions, 3rd Sem Question papers,
http://www.annaunivedu.org/digital-electronics-ec-2203-previous-year-question-paper-for-3rd-sem-ece-anna-univ-question/
Google Calendar is a versatile tool that allows users to manage their schedules and events effectively. With Google Calendar, you can create and organize calendars, set reminders for important events, and share your calendars with others. It also provides features like creating events, inviting attendees, and accessing your calendar from mobile devices. Additionally, Google Calendar allows you to embed calendars in websites or platforms like SlideShare, making it easier for others to view and interact with your schedules.
Building a Raspberry Pi Robot with Dot NET 8, Blazor and SignalR - Slides Onl...Peter Gallagher
In this session delivered at Leeds IoT, I talk about how you can control a 3D printed Robot Arm with a Raspberry Pi, .NET 8, Blazor and SignalR.
I also show how you can use a Unity app on an Meta Quest 3 to control the arm VR too.
You can find the GitHub repo and workshop instructions here;
https://bit.ly/dotnetrobotgithub
Lec9 Intro to Computer Engineering by Hsien-Hsin Sean Lee Georgia Tech -- Combinational Logic
1. ECE2030
Introduction to Computer Engineering
Lecture 9: Combinational Logic, Mixed Logic
Prof. Hsien-Hsin Sean LeeProf. Hsien-Hsin Sean Lee
School of Electrical and Computer EngineeringSchool of Electrical and Computer Engineering
Georgia TechGeorgia Tech
2. Logic Design
• Logic circuits
– Combinational
– Sequential
Combinational
circuits
N
inputs
M
outputs
Combinational
circuits
inputs outputs
Storage
Element
delaydelay
3. Combinational Logic
• Outputs, “at any time”, are determined by the input
combination
• When input changed, output changed immediately
– Note that real circuits are imperfect and have “propagation delay”
• A combinational circuit
– Performs logic operations that can be specified by a set of Boolean
expressions
– Can be built hierarchically
Combinational
circuits
N
inputs
M
outputs
8. Mixed Logic
• Enable component reuse
• Allow a digital logic circuit designer to
implement a combinational logic with
– Only NAND gates
– Only NOR gates
– Only NAND and NOR gates
14. Mixed Logic (3)
• Convert each gate to the desired gate
– If only NAND gate is available, insert a bubble in
front of the AND gate
– If only OR gate is available, insert a bubble in
front of the OR gate
• Using DeMorgan’s Law in the process
– OR ⇒ NAND: by adding 2 bubbles on the inputs
side of OR
– AND ⇒ NOR: by adding 2 bubbles on the inputs
side of the AND
15. Example: Mixed Logic (3)
DABCD)C,B,F(A, +=
B
C
D
A
Assume this design usesAssume this design uses NANDNAND gatesgates onlyonly
==
16. Mixed Logic (4)
• Balance the bubbles on each wire, i.e. even
out the number of bubbles on every wire
• If there is odd number of bubbles on a wire,
add an inverter (i.e. a bubble)
• And remove those “vertical bars with
bubbles” which are used to help only, not in
the circuits
17. Example: Mixed Logic (4)
DABCD)C,B,F(A, +=
B
C
D
A
Assume this design usesAssume this design uses NANDNAND gatesgates onlyonly
18. How about Inverters?
• Inverters can be implemented by either a NAND or a
NOR gate
– Wiring the inputs together
≡≡
≡≡
19. Example: Mixed Logic (Final)
DABCD)C,B,F(A, +=
B
C
D
A
Assume this design usesAssume this design uses NANDNAND gatesgates onlyonly
20. Example: Mixed Logic (Final)
DABCD)C,B,F(A, +=
B
C
D
A
Assume this design usesAssume this design uses NANDNAND gatesgates onlyonly
6 NAND gates are used6 NAND gates are used
21. Mixed Logic
• How about build the prior circuits with only
NOR gates?
23. Example: Mixed Logic (2)
DABCD)C,B,F(A, +=
B
C
D
A
Add vertical bar forAdd vertical bar for
each inversioneach inversion
24. Example: Mixed Logic (3)
DABCD)C,B,F(A, +=
B
C
D
A
Assume this design usesAssume this design uses NOR gatesNOR gates onlyonly
==
Convert each gateConvert each gate
to a NORto a NOR
25. Example: Mixed Logic (4)
DABCD)C,B,F(A, +=
B
C
D
A
Assume this design usesAssume this design uses NOR gatesNOR gates onlyonly
Balance number ofBalance number of
Bubbles on each wireBubbles on each wire
26. Example: Mixed Logic (4)
DABCD)C,B,F(A, +=
Assume this design usesAssume this design uses NOR gatesNOR gates onlyonly
Balance number ofBalance number of
bubbles on each wirebubbles on each wire
and substitute all gatesand substitute all gates
to NORto NOR
B
C
D
A
27. Example: Mixed Logic (Final)
DABCD)C,B,F(A, +=
Assume this design usesAssume this design uses NOR gatesNOR gates onlyonly
B
C
D
A
7 NOR gates are used7 NOR gates are used
28. Mixed Logic Example II (1)
))DC(BACBAF ⋅++++=
C
D
A
B
Implement the logic circuits by ignoring all inversionsImplement the logic circuits by ignoring all inversions
29. Mixed Logic Example II (2)
))DC(BACBAF ⋅++++=
C
D
A
B
Add vertical bar/bubble for each inversionAdd vertical bar/bubble for each inversion
30. Mixed Logic Example II (3)
))DC(BACBAF ⋅++++=
C
D
A
B
Assume this design usesAssume this design uses NANDNAND gatesgates onlyonly
31. Mixed Logic Example II (4)
))DC(BACBAF ⋅++++=
C
D
A
B
Balance the bubbles for each wire w/ invertersBalance the bubbles for each wire w/ inverters
32. Mixed Logic Example II (5)
))DC(BACBAF ⋅++++=
C
D
A
B
Remove the vertical bars/bubblesRemove the vertical bars/bubbles
33. Mixed Logic Example II (6)
))DC(BACBAF ⋅++++=
C
D
A
B
Replace all the gates toReplace all the gates to NAND gatesNAND gates
34. Mixed Logic Example II (7)
))DC(BACBAF ⋅++++=
C
D
A
B
Final mixed logic uses 11 NAND gatesFinal mixed logic uses 11 NAND gates
(one of them is a triple-input NAND gate)(one of them is a triple-input NAND gate)
35. Mixed Logic Example III (1)
DBACAF =
B
D
A
C
Implement the logic circuits by ignoring all inversionsImplement the logic circuits by ignoring all inversions
36. Mixed Logic Example III (2)
DBACAF =
B
D
A
C
Add vertical bar/bubble for each inversionAdd vertical bar/bubble for each inversion
37. Mixed Logic Example III (3)
DBACAF =
B
D
A
C
Assume this design usesAssume this design uses NOR gatesNOR gates onlyonly
38. Mixed Logic Example III (4)
DBACAF =
B
D
A
C
Balance the bubbles for each wire w/ invertersBalance the bubbles for each wire w/ inverters
39. Mixed Logic Example III (5)
DBACAF =
B
D
A
C
Remove the vertical bars/bubblesRemove the vertical bars/bubbles
40. Mixed Logic Example III (6)
DBACAF =
B
D
A
C
Replace all the gates toReplace all the gates to NOR gatesNOR gates
41. Mixed Logic Example III (7)
DBACAF =
B
D
A
C
Final mixed logic uses 9 NOR gatesFinal mixed logic uses 9 NOR gates