Group 10 flip flop and rs latch 1
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This document discusses latches and their design process. It begins by defining a latch as a circuit that has two stable states and can store state information. It then describes the different types of latches including asynchronous and synchronous latches. The RS latch is examined in more detail with diagrams of its logic structure and a truth table. Key properties of the RS latch are that it uses two inputs called Set and Reset to store a 1 or 0 without a clock, and it can immediately change its output when the inputs change.
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Latches
This document discusses different types of latches used in computing and data storage. It describes latches as basic bistable elements that use feedback to retain information. The document outlines several types of latches including SR latches, D latches, JK latches, and T latches. It explains their circuit designs and behaviors. Examples are provided of how latches are used to encode binary data and in synchronous and asynchronous systems. Advantages of latches like flexibility and power efficiency are contrasted with disadvantages like potential race conditions and metastability issues.
latches
Latches are asynchronous electronic logic circuits with two stable output states. There are four main types of latches: D, T, SR, and JK latches. An SR latch has two inputs - SET (S) and RESET (R) - and two complementary outputs (Q and Q'). The state of the latch depends on whether input S or R is activated. A D latch similarly has one data input and two complementary outputs, but removes invalid states that can occur in an SR latch. Latches can be either active-high or active-low, depending on whether a high or low input triggers a state change.
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This document discusses latches and flip flops, which are types of sequential logic circuits. It describes the basic components and functioning of latches like SR latches, D latches, and gated latches. For flip flops, it covers SR flip flops, D flip flops, JK flip flops, and master-slave flip flops. The key differences between latches and flip flops are that latches do not have a clock input while flip flops are edge-triggered by a clock signal. Latches and flip flops are used as basic storage elements in more complex sequential circuits and in computer components like registers and RAM.
Latches & flip flop
This document summarizes sequential circuits and their basic components - latches and flip-flops. It describes how latches like the SR, S'R', and D latches work based on inputs but no clock signal, while flip-flops like edge-triggered flip-flops change state based on the clock edge. Examples of additional flip-flop inputs like preset, clear and clock enable are provided to control the output independent of the clock. Asynchronous sequential circuits can override the clock input using preset and clear inputs to directly control the output states.
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The document describes the workings of an SR latch circuit. An SR latch consists of two cross-coupled NOR or NAND gates with inputs named S (Set) and R (Reset). The circuit can be in one of two states: the set state where output Q=1 and Q'=0, or the reset state where Q=0 and Q'=1. When S=1 and R=0, the circuit enters the set state by forcing Q to 1 and Q' to 0. When R=1 and S=0, the circuit enters the reset state with Q=0 and Q'=1. Once set or reset, the state will be maintained even if the input changing it toggles again.
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The document discusses sequential circuits and latches. It explains that sequential circuits have memory so their outputs depend not only on current inputs but also on the stored state. Latches are described as basic memory units that can store a single bit. Different types of latches like SR, D, and JK latches are presented along with their truth tables and operation. State diagrams are introduced as a way to represent sequential circuits. The use of latches with an ALU to increment a stored value is given as an example, but the timing issue of when to disable the latches is noted as a potential problem.
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This document discusses sequential logic circuits and memory elements such as latches and flip-flops. It describes different types of latches including the S-R latch, gated S-R latch, and gated D latch. It also covers various types of flip-flops including the S-R, D, J-K, and T flip-flops. It explains the differences between latches and flip-flops and their applications in synchronous and asynchronous logic circuits.
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This document discusses different types of latches used in computing and data storage. It describes latches as basic bistable elements that use feedback to retain information. The document outlines several types of latches including SR latches, D latches, JK latches, and T latches. It explains their circuit designs and behaviors. Examples are provided of how latches are used to encode binary data and in synchronous and asynchronous systems. Advantages of latches like flexibility and power efficiency are contrasted with disadvantages like potential race conditions and metastability issues.
latches
Latches are asynchronous electronic logic circuits with two stable output states. There are four main types of latches: D, T, SR, and JK latches. An SR latch has two inputs - SET (S) and RESET (R) - and two complementary outputs (Q and Q'). The state of the latch depends on whether input S or R is activated. A D latch similarly has one data input and two complementary outputs, but removes invalid states that can occur in an SR latch. Latches can be either active-high or active-low, depending on whether a high or low input triggers a state change.
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This document discusses latches and flip flops, which are types of sequential logic circuits. It describes the basic components and functioning of latches like SR latches, D latches, and gated latches. For flip flops, it covers SR flip flops, D flip flops, JK flip flops, and master-slave flip flops. The key differences between latches and flip flops are that latches do not have a clock input while flip flops are edge-triggered by a clock signal. Latches and flip flops are used as basic storage elements in more complex sequential circuits and in computer components like registers and RAM.
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This document summarizes sequential circuits and their basic components - latches and flip-flops. It describes how latches like the SR, S'R', and D latches work based on inputs but no clock signal, while flip-flops like edge-triggered flip-flops change state based on the clock edge. Examples of additional flip-flop inputs like preset, clear and clock enable are provided to control the output independent of the clock. Asynchronous sequential circuits can override the clock input using preset and clear inputs to directly control the output states.
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The document describes the workings of an SR latch circuit. An SR latch consists of two cross-coupled NOR or NAND gates with inputs named S (Set) and R (Reset). The circuit can be in one of two states: the set state where output Q=1 and Q'=0, or the reset state where Q=0 and Q'=1. When S=1 and R=0, the circuit enters the set state by forcing Q to 1 and Q' to 0. When R=1 and S=0, the circuit enters the reset state with Q=0 and Q'=1. Once set or reset, the state will be maintained even if the input changing it toggles again.
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The document discusses sequential circuits and latches. It explains that sequential circuits have memory so their outputs depend not only on current inputs but also on the stored state. Latches are described as basic memory units that can store a single bit. Different types of latches like SR, D, and JK latches are presented along with their truth tables and operation. State diagrams are introduced as a way to represent sequential circuits. The use of latches with an ALU to increment a stored value is given as an example, but the timing issue of when to disable the latches is noted as a potential problem.
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The document discusses flip-flops and latches, which are basic storage elements in digital electronics. It describes how the first electronic flip-flop was invented in 1918 and consisted of two vacuum tubes. Common types of flip-flops include the SR NOR latch, D latch, and JK flip-flop. Integrated circuits like the 7474 and 7475 contain dual and quad D-type flip-flops, while the 74LS373 is an octal D-type latch useful for interfacing with 8-bit buses. Flip-flops and latches store state information and are fundamental building blocks in computers and other digital systems.
Group 9 flip flops
The document discusses different types of flip-flops including SR, JK, D, and T flip-flops. It describes how flip-flops have two stable output states (0 and 1) and are used to store state in digital circuits. The document provides details on latch and edge-triggered flip-flop operation, propagation delays, setup and hold times, and how master-slave configurations are used to construct flip-flops from basic latch designs. Examples of specific flip-flop circuits like the SR, JK, and D flip-flops are presented along with their characteristic equations.
Lecture 1 6844
This document provides an overview of sequential circuits and flip-flops. It discusses how sequential circuits differ from combinational circuits in that their outputs depend not only on current inputs but also past inputs. Common types of sequential circuits like synchronous and asynchronous circuits are described. The document focuses on different types of flip-flops like SR, JK, D and T flip-flops. It provides details on how SR flip-flops can be constructed using NAND or NOR gates and how adding a clock input makes it a clocked SR flip-flop that only changes state on the clock edge. Examples of truth tables for SR and clocked SR flip-flops are also presented.
Lab 12 – Latches and Flip-Flops Mugisha OmaryLab 12 .docx
The document discusses latches and flip-flops. It explains that latches can remain in the state they were set in even after input signals are removed. The main difference between latches and flip-flops is that latches are level-triggered while flip-flops are edge-triggered. Various latch and flip-flop circuits like D latches, SR latches, and JK flip-flops are described along with their truth tables. Experiments were conducted using integrated circuits to observe and verify the behavior of different latch and flip-flop circuits.
flip flop.pptx
This document discusses sequential circuits and basic storage elements. It begins by defining sequential circuits as those whose output depends not only on present inputs but also previous states. This is contrasted with combinational circuits. The basic storage elements of latches and flip-flops are then introduced. SR latches using NOR and NAND gates are described and their set, reset, and indeterminate states explained. Control inputs and D latches are also summarized. The document aims to provide an introduction to sequential circuits, focusing on latches and flip-flops.
Ds flip flop
This document discusses sequential logic circuits and memory elements. It describes latches and flip-flops, which are basic memory elements used in sequential circuits. Specifically, it covers the set-reset (SR) latch, D flip-flop, and JK flip-flop. It provides their logic diagrams, truth tables, and examples of how their output changes in response to different input patterns over time. Asynchronous preset and clear inputs are also discussed as additional control inputs for flip-flops.
B sc3 unit 5 sequencial lc
1. The document discusses sequential logic circuits and various types of flip-flops including SR, D, JK, and T flip-flops. It explains the operation of each flip-flop through truth tables and timing diagrams.
2. Master-slave JK flip-flops are described as using two SR flip-flops in a cascade configuration to avoid unwanted output changes from glitches in the clock signal.
3. Other topics covered include latches, triggering methods, and uses of different flip-flop types in applications such as registers and counters.
Presentation On Flip-Flop
In electronics, a flip-flop or latch is a circuit that has two stable states and can be used to store state information – a bistable multivibrator. The circuit can be made to change state by signals applied to one or more control inputs and will have one or two outputs.
Lecture 5 Synchronous Sequential Logic
This document provides an overview of synchronous sequential logic and storage elements such as latches and flip-flops. It discusses the differences between combinational and sequential circuits, and between synchronous and asynchronous sequential circuits. Storage elements like latches and flip-flops are described, including SR latches, D latches, and edge-triggered D, JK, and T flip-flops. Characteristic tables and equations are presented for different flip-flop types. Timing parameters for flip-flops like setup time and hold time are also covered. The document is for a lecture on synchronous sequential logic given by Professor Jim Evangelos at Cecil College.
Introduction to Sequential DevicesChapter 66.1 M.docx
Introduction to Sequential Devices
Chapter 6
6.1 Models for Sequential CircuitsElevator example:
6.1.1 Block Diagram representation
Memory devices:
- Semiconductor Flip-Flops
- Magnetic devices
- Delay lines
- Mechanical relays
- Rotation switches
- Etc…
This circuit can be represented by the following equations:
Vector Notation:
- All the vectors are time dependant
- Vector y has the value y(tk) at time tk.
- Input signals xi and output signal zi may assume a variety of forms
6.1.2 State Tables and DiagramsThe state diagram is a graphical representation of a sequential circuit in which the states are represented by circles and state transition of the circuit are shown by arrows.
State table : all circuit input vectors are listed across the top, while all state vectors are listed down the left side. Entries in the table are the next state and the output.
In practice, the state diagrams and tables are usually labeled using symbols rather than vectors. For example consider a sequential circuit with two present state variables y1, and y2. Then y= [y1 , y2]Therefore the vector y can have any of the four possible values:
In general, if r represents the number of memory devices (number of states) in a circuit with Ns states then
Example: Consider the following sequential circuit with one input x, two state variables y1 and y2, and one output z.
The state diagram is:
Let assume that the circuit is initially in state A. now consider the application of the following input sequence to the circuit:
Hence the input sequence applied to the machine in state A cause the output sequence
Z=0100110111
And leaves the circuit in its final state C.
6.2 Memory Devices-Most memory elements are bistable electronic circuits, that is, they exist indefinitely in one of two possible states, 0 and 1. - Binary data are stored in a memory element by placing the element into the 0 state to store 0 and into the 1 state to store 1. - The output of the memory indicates the present state. - The input of the memory indicates the next state. - Each memory element has one or more excitation inputs, so called because they are used to “excite” or drive the circuit into the desired state.
Two memory element types
The Two memory element types most commonly used in switching circuits are latches and flip-flops.1- LATCHES
A latch is a memory element whose excitation input signals control the state of
the device
A set latch: the excitation input forces the output of the device to 1.
A Reset latch: the excitation inputs force the device output to 0.
A Set-Reset latch: a latch with both set and reset excitation signals.
Timing Diagram of SR LATCH
2- FLIP-FLOP:
A flip-flop differs from a latch in that it has a
control signal called clock. The clock signal
issues a command to the flip-flop, allowing it
to change states in accordance with its
excitation input signals.
- In both latches and flip-flops, the next s.
Introduction to flipflops basic of elctronics COA.pptx
The document discusses different types of digital circuits, including combinational circuits and sequential circuits. It focuses on sequential circuits and describes them as circuits that store and use previous state information. The document discusses two types of sequential circuits - asynchronous and synchronous. It also discusses different types of memory elements used in sequential circuits, including latches and flip-flops. Specifically, it describes SR latches, D latches, and different types of flip-flops like SR, JK, D and T flip-flops. It provides truth tables and diagrams to explain the working of these memory elements.
Sequential circuit-flip flops
The presentation covers synchronous sequential circuit elements; latch and Flip flops, SR Flip flop, JK Flip flop, T flip flop, D Flip flop, race around condition, Edge triggered flip flop
lec7
This document discusses sequential logic and flip-flops. It begins by explaining the differences between sequential and combinational logic, noting that sequential logic outputs depend on both inputs and internal state, and change based on a clock signal. The simple R-S flip-flop is described as having two cross-connected NAND gates and being set or reset based on input signals. Clocked circuits are then introduced, with states only changing on the rising or falling edge of the clock signal. Finally, the D flip-flop is presented as having one data input and being set or reset based on the clock and input values.
Digital_Electronics_Module_4_Sequential_Circuits v0.6.pptx
This document discusses sequential circuits and their components. It begins by defining sequential circuits as circuits whose outputs depend not only on present inputs but also past states, stored using latches and flip-flops. It then covers various types of sequential circuits and their basic components like latches, flip-flops, registers and counters. Specific latch and flip-flop types like SR, D, JK and T are described along with their characteristics. Applications of shift registers and different counter types are also mentioned.
Similar to Group 10 flip flop and rs latch 1 (20)
Lab 12 – Latches and Flip-Flops Mugisha OmaryLab 12 .docx
Lab 12 – Latches and Flip-Flops Mugisha OmaryLab 12 .docx
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Introduction to Sequential DevicesChapter 66.1 M.docx
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Introduction to flipflops basic of elctronics COA.pptx
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Group 10 flip flop and rs latch 1
- 1. Latches and their Design Process Submitted To: Sir Inam ul haq Submitted By: Group 10 Yusra Karim 1053 Mehwish Ifftikhar 1057 Gulshan Shakeela 1045 Urasha Akram 1044 University of Education Okara Campus 1
- 2. Flip Flop In electronics, a flip-flop or latch is a circuit that has two stable states and can be used to store state information. (Wikipedia) University of Education Okara Campus 2
- 3. Types of Flip Flop Flip Flop (Known as Latch ) (Known as F/F) Asynchronous Synchronous RS Latch Clock RS F/F JK Flip Flop University of Education Okara Campus 3
- 4. Difference Between Synchronous & Asynchronous Asynchronous: Output change immediately when input changes. Its event driven. . Synchronous: Output change but according to clock pulse not Immediately in many times. Its clock pulse driven. University of Education Okara Campus 4
- 5. RS Latch It’s a block diagram of RS Latch. University of Education Okara Campus 5
- 6. Logical Diagram for RS Latch Active Low Latch (Using Nand Gates) University of Education Okara Campus 6
- 7. Truth Table for RS Latch It’s a truth table for RS Latch using Nand Gates. University of Education Okara Campus 7
- 8. Description about RS Latch It has two Inputs S and R Input S means set & input R means reset It has two outputs Q and Q’ No clock pulse are used in a latch It can store 1 bit of data (either 1 or 0) It has two states whether set or reset In set condition it store 1 bit And in reset condition it store 0 bit University of Education Okara Campus 8
- 9. Description about RS Latch (Cont..) Its asynchronous device Inputs change output immediately when input changes. When S=1 and R=0 0n input then it will reset (store 0 bit) When S=0 and R=1 on input then it will set (store 1 bit) University of Education Okara Campus 9
- 10. References: https://en.wikibooks.org/wiki/Digital_Circuits/Flip-Flops https://en.wikibooks.org/wiki/Digital_Circuits/Latches https://en.wikipedia.org/wiki/State_diagram University of Education Okara Campus 10