Encoder Decoder PDF

ENCODER & DECODER PAVITHRA BALASUBRAMANIAN- 18 ANUSHKA WADEKAR - 17 SHRUTI JOSHI - 21 RUCHI WALUJKAR - 7  TOPICS COVERED PRIORITY ENCODER OCTAL TO BINARY ENCODER BCD TO BINARY ENCODER BCD TO SEVEN SEGMENT DECODER  ENCODER An encod...

ENCODER & DECODER PAVITHRA BALASUBRAMANIAN- 18 ANUSHKA WADEKAR - 17 SHRUTI JOSHI - 21 RUCHI WALUJKAR - 7  TOPICS COVERED PRIORITY ENCODER OCTAL TO BINARY ENCODER BCD TO BINARY ENCODER BCD TO SEVEN SEGMENT DECODER  ENCODER An encoder is a combinational circuit that converts binary information in the form of a 2N input lines into N output lines, which represent N bit code for the input. For simple encoders, it is assumed that only one input line is active at a time PRIORITY ENCODER WORKING AND FUNCTIONALITY A priority encoder is a combinational logic circuit that produces outputs based on the highest priority input when multiple inputs are activated simultaneously. A priority encoder ensures that only the input with the highest priority is considered when multiple inputs are active. It resolves conflicts by prioritizing the highest input, which is crucial in systems like keyboards and input devices. This process, PIN DIAGRAMS AND TRUTH TABLE 4X2 ENCODER 8X3 ENCODER  CIRCUIT DIAGRAM 4X2 ENCODER 8X3 ENCODER  APPLICATIONS OF PRIORITY ENCODER COMPUTER INPUT KEYBOARDS DEVICES Digital Communication Interrupt Controllers Systems  OCTAL TO BINARY ENCODER An octal-to-binary encoder converts octal (base-8) numbers to binary (base-2), with each octal digit corresponding to a 3-bit binary sequence. This simplifies binary conversion by breaking down complex numbers into manageable 3-bit groups, making it efficient for digital systems. Applications of an octal-to-binary encoder: 1.Digital Electronics 2.Microprocessor Programming 3.Embedded Systems 4. Computer Graphics 5. Networking  BASIC Octal to binary encoder consists of OPERATION eight inputs, one for each of eight digits and three outputs which generate the consequent binary number. For example: low order output bit Z is if the input octal digit is odd. There is DO input is not linked to any O R gate; the binary output must be all zeroes in such case and all 0's output is also acquired, while all inputs are zeroes. This discrepancy can be resolved through giving one more output to specify the fact as all inputs are not zeroes.  DIAGRAM AND TRUTH TABLE  BCD TO BINARY ENCODER A BCD (Binary Coded Decimal) to binary encoder is a digital circuit that converts a BCD number into its equivalent binary number. It consists of inputs (0-9) and 4 outputs. The BCD input provided to the encoder is converted to a 4-bit binary output. Internal Logic: The internal circuitry of the encoder processes the BCD input and generates the corresponding binary output. Binary Output: The binary equivalent of the BCD input appears on the output lines. BCD to binary encoders are used in various digital systems, including: Microcontrollers: For interfacing with decimal input/output devices. Digital Clocks: To display time in decimal format. Digital Meters: To display numerical readings. Data Acquisition Systems: For processing decimal data.  OPERATION OF BCD TO BINARY BCD Input: The system receives an input representing a decimal digit. This could be any oneENCODER of the values from 0000 (0) to 1001 (9). Conversion: The encoder converts the BCD code into its binary equivalent. Output: The output is the decimal digit in binary form. If the BCD input is valid (0-9), the encoder simply outputs the corresponding binary value. Example- For BCD 1001 (decimal 9), the output will be 1001 (binary for decimal 9). For BCD 0111 (decimal 7), the output will be 0111 (binary for decimal 9) Handling Invalid Inputs: If the input is a BCD value that represents a number greater than 9 (such as 1010, which is 10 in decimal), this value is invalid in a standard BCD system. The encoder may return an error signal, or ignore the input, depending on the design of the encoder. PIN DIAGRAM AND TRUTH TABLE TRUTH TABLE PIN DIAGRAM  CIRCUIT DIAGRAM  DECODER In digital electronics, a combinational logic circuit that converts an N- bit binary input code into M output channels in such a way that only one output channel is activated for each one of the possible combinations of inputs is known as a decoder.  BCD TO 7 SEGMENT DECODER A BCD (Binary-Coded Decimal) to seven-segment decoder is a circuit that converts a 4-bit BCD input (representing a decimal digit 0-9) into signals that control a 7-segment display to show the corresponding digit. Key Points: 1. BCD Input: A 4-bit binary input (ranging from 0000 to 1001) represents decimal digits from 0 to 9. 2. 7-Segment Display: A display with 7 segments (labeled a through g) that can light up in different combinations to form the numbers 0-9. Each segment is controlled by a logic signal. 3. Decoder Function: The decoder takes the BCD input and activates the correct combination of segments to display the corresponding Example of Decoder Logic: Each BCD input corresponds to a unique set of outputs to drive the segments: 1. For BCD "0000" (digit 0), the output would be: a=1, b=1, c=1, d=1, e=1, f=1, g=0. 2. For BCD "0001" (digit 1), the output would be: a=0, b=1, c=1, d=0, e=0, f=0, g=0. The decoder is typically implemented using logic gates or can be found in integrated circuits