3_Basic Logic Gates universal gates.pptx

gates

1. Subject: Digital Logic and Computer Organization Unit 1 Digital Logic Circuits-I: Basic Logic Functions Logic gates Universal logic gates Minimization of Logic expressions K-Map Simplification Combinational Circuits Decoders Multiplexers

2. Course Outcomes At the end of this course, you will be able to Classify different number systems and apply them to generate various codes. (L2) Use the concept of Boolean algebra in minimization of switching Functions. (L4) Design different types of combinational and sequential circuits. (L4) Apply the knowledge of flip-flops to design registers and counters. (L5) Understand the basics of computer and its operations. (L1) Conceptual knowledge on Processor, Memory and I/O organization. (L3)

3. PROGRAM OUTCOMES(Pos) PO1 Engineering knowledge Engineering knowledge: Apply the knowledge of mathematics, science, engineering fundamentals, and an engineering specialization to the solution of complex engineering problems. PO2 Problem analysis Problem analysis: Identify, formulate, review research literature, and analyze complex engineering problems reaching substantiated conclusions using first principles of mathematics, natural sciences, and engineering sciences. PO3 Design/development of solutions Design/development of solutions: Design solutions for complex engineering problems and design system components or processes that meet the specified needs with appropriate consideration for the public health and safety, and the cultural, societal, and environmental considerations. PO4 Conduct investigations of complex problems Conduct investigations of complex problems: Use research-based knowledge and research methods including design of experiments, analysis and interpretation of data, and synthesis of the information to provide valid conclusions. PO5 Modern tool usage Modern tool usage: Create, select, and apply appropriate techniques, resources, and modern engineering and IT tools including prediction and modeling to complex engineering activities with an understanding of the limitations. PO6 The engineer and society The engineer and society: Apply reasoning informed by the contextual knowledge to assess societal, health, safety, legal and cultural issues and the consequent responsibilities relevant to the professional engineering practice.

4. PROGRAM OUTCOMES(Pos) PO7 Environment and sustainability Environment and sustainability: Understand the impact of the professional engineering solutions in societal and environmental contexts, and demonstrate the knowledge of, and need for sustainable development PO8 Ethics Ethics: Apply ethical principles and commit to professional ethics and responsibilities and norms of the engineering practice. PO9 Individual and team work Individual and team work: Function effectively as an individual, and as a member or leader in diverse teams, and in multidisciplinary settings. PO10 Communication Communication: Communicate effectively on complex engineering activities with the engineering community and with society at large, such as, being able to comprehend and write effective reports and design documentation, make effective presentations, and give and receive clear instructions. PO11 Project management and finance Project management and finance: Demonstrate knowledge and understanding of the engineering and management principles and apply these to one’s own work, as a member and leader in a team, to manage projects and in multidisciplinary environments. PO12 Life-long learning Life-long learning: Recognize the need for, and have the preparation and ability to engage in independent and life-long learning in the broadest context of technological change.

5. PROGRAM SPECIFIC OUTCOMES (PSO’s) PSO1 An ability to isolate and solve complex problems in the domain of electronics and Communication by selecting appropriate hardware and software tools. PSO2 An ability to design, develop and validate inter disciplinary products, process by applying the knowledge and skill of signal processing, embedded systems, VLSI, networking and communication engineering.

6. BASIC LOGIC CIRCUITS COMBINATIONAL CIRCUITS AND SEQUENTIAL CIRCUITS

7. CONTENTS Logic Gates Truth table Types of circuits -: Combinational Circuits Sequential Circuits

8. What is a gate? The building blocks used to create digital circuits are logic gates Combination of transistors that performs binary logic There are three elementary logic gates and a range of other simple gates Each gate has its own logic symbol which allows complex functions to be represented by a logic diagram The function of each gate can be represented by a truth table or using Boolean notation

9. LOGIC GATES Types of gates NOT AND OR NAND NOR EX-OR EX-NOR BUFFER GATE

10. NOT Gate A NOT gate accepts one input value and produces one output value By definition, if the input value for a NOT gate is 0, the output value is 1, and if the input value is 1, the output is 0 A NOT gate is sometimes referred to as an inverter because it inverts the input value

11. AND Gate An AND gate accepts two input signals If the two input values for an AND gate are both 1, the output is 1; otherwise, the output is 0

12. OR Gate If the two input values are both 0, the output value is 0; otherwise, the output is 1

13. NAND and NOR Gates The NAND and NOR gates are essentially the opposite of the AND and OR gates, respectively. They are also called universal gates.

14. XOR Gate XOR, or exclusive OR, gate An XOR gate produces 0 if its two inputs are the same, and a 1 otherwise

15. XNOR Gate The exclusive-nor gate or xnor is logically equivalent to an xor gate followed by an inverter

16. BUFFER GATE The buffer gates returns the same output as same as that of input

17. Combinational Circuits The digital logic circuits whose outputs can be determined using the logic function of current state input are combinational logic circuits AND AND OR

18. As soon as inputs are changed, the information about the previous inputs is lost, that is, combinational logic circuits have no memory. Some examples of combinational circuits are-: Adder Subtractor Decoder Encoder Multiplexer Demultiplexer

19. The digital logic circuits whose outputs can be determined using the logic function of current state inputs and past state inputs and also can store information are called as sequential logic circuits. Sequential Circuits

20. It is a combination of memory elements and combinational gates. Types of sequential circuits Flip flops Registers Counters

21. THANK YOU……