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Tags: nand gate

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dld exp 1

dld exp 1

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GATES

GATES

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and gate out of nand gates

and gate out of nand gates

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Decimal to Binary Encoder &amp; Decoder

Decimal to Binary Encoder &amp; Decoder

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Verifying Basic Gates

Verifying Basic Gates

Verifying the truth table for basic and universal gates

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verifying gates

verifying gates

Verifying basic gates

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Logic gates

Logic gates

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SR Flip Flop

SR Flip Flop

The basic NAND gate RS flip flop circuit is used to store the data and thus provides feedback from both of its outputs again back to its inputs. The RS flip flop actually has three inputs, SET, RESET and its current output Q relating to its current state.

Truth Table for RS flip –flop

Clk

R

S

Q

Q

0

X

X

Previous or Memory State

1

1

0

0

1

1

0

1

1

0

1

0

0

Previous or Memory State

1

1

1

Invalid State

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D flip-flop

D flip-flop

A D flip flop has a single data input. This type of flip flop is obtained from the SR flip flop by connecting the R input through an inverter, and the S input is connected directly to data input. The modified clocked SR flip-flop is known as D-flip-flop and is shown below. From the truth table of SR flip-flop we see that the output of the SR flip-flop is in unpredictable state when the inputs are same and high. In many practical applications, these input conditions are not required. These input conditions can be avoided by making them complement of each other.

Truth Table for D flip-flop

Clk

D

Q

Q

0

1

Previous or memory state

0

1

1

0

0

1

1

1

1

0

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JK flip-flop

JK flip-flop

In a RS flip-flop the input R=S=1 leads to an indeterminate output. The RS flip-flop circuit may be re-joined if both inputs are 1 than also the outputs are complement of each other as shown in characteristics table below.

Truth Table for JK flip-flop

Input

Output

Clk

J

K

Q

Q

0

X

X

Previous or Memory State

1

1

0

1

0

1

0

1

0

1

1

0

0

Previous or Memory State

1

1

1

Toggle State

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T flip-flop

T flip-flop

T flip-flop is known as toggle flip-flop. The T flip-flop is modification of the J-K flip-flop. Both the JK inputs of the JK flip – flop are held at logic 1 and the clock signal continuous to change as shown in table below.

Truth Table of T flip-flop

Clk

T

Q

Q

0

1

Previous or memory state

0

0

1

0

1

1

Toggle state

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lab 1

lab 1

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Full adder (NAND gate)

Full adder (NAND gate)

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NAND Gate

NAND Gate

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devansh

devansh

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Untitled

Untitled

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Circuit

Circuit

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Verify the truth tables for NAND, NOR gates

Verify the truth tables for NAND, NOR gates

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Digital Electronics Presentation

Digital Electronics Presentation

Digital Electronics Presentation