How many inputs are in a priority encoder if it has 4 outputs?
4 inputs
Priority Encoder – A 4 to 2 priority encoder has 4 inputs : Y3, Y2, Y1 & Y0 and 2 outputs : A1 & A0.
What is priority encoder truth table?
The priority encoder is a circuit that executes the priority function. The logic of the priority encoder is such that two or more inputs appear at an equal time, the input having the largest priority will take precedence. The truth table of a four-input priority encoder is given in the table.
How many inputs are there in 10 line to 4 line priority encoder?
This device features priority encoding of the inputs to ensure that only the highest order data line is encoded. Nine input lines are encoded to a four line BCD output.
Which of the following options are correct for a 4 1 multiplexer?
Which of the following options are correct for a 4×1 multiplexer? Explanation: A 4 x 1 multiplexer has 2 select lines, 4 input lines, and 1 output line. AND gates are required to pass the inputs. Thus 4 AND gates will be used for each input.
What is priority encoder explain with example?
Priority encoders can be used to reduce the number of wires needed in a particular circuits or application that have multiple inputs. For example, assume that a microcomputer needs to read the 104 keys of a standard QWERTY keyboard where only one key would be pressed either “HIGH” or “LOW” at any one time.
How many truth table entries are necessary for a four input circuit?
How many truth table entries are necessary for a four-input circuit? Explanation: For 4 inputs: 24 = 16 truth table entries are necessary.
How many 16 input or gates are required to build a 4/16 decoder?
Following the steps we took in the lecture, we are supposed to build a 4×16 decoder. So here taking k to be 4, k is even, so we will have 2k so 24=16 AND gates & 2 decoders each of size 2k/2 so 22=4.
How do you make a truth table for a multiplexer?
The block diagram of 4×1 Multiplexer is shown in the following figure. One of these 4 inputs will be connected to the output based on the combination of inputs present at these two selection lines. Truth table of 4×1 Multiplexer is shown below….4×1 Multiplexer.
| Selection Lines | Output | |
|---|---|---|
| 1 | 0 | I2 |
| 1 | 1 | I3 |
Can logic gates have 4 inputs?
Like the AND gate, the OR function can have any number of individual inputs. However, commercial available OR gates are available in 2, 3, or 4 inputs types. Additional inputs will require gates to be cascaded together for example.
How many inputs are required for a 4 16 decoder?
16 = 24 = 2n. Thus, number of inputs is 4.
When the number of inputs in a decoder is 4 What will be the no of outputs?
Every decoder with n input lines will have exactly 2n output lines. So, a two-to-four decoder will have two input lines and four output lines, while a three-to-eight decoder will have three input lines and eight output lines.
What is the 8 to 3-bit priority encoder truth table?
The 8 to 3-bit priority encoder truth table is shown below. The inputs in the following truth table are Y0 to Y7 and Outputs are A0 to A3. In the above tabular form, ‘X’ equals “don’t care”, that is logic “0” or logic “1”. From this truth table, the Boolean expression for the above type with data inputs Y0 to Y7 and outputs A0, A1, A2 is given as:
What is a 4 to 2 priority encoder?
A 4 to 2 priority encoder has 4 inputs : Y3, Y2, Y1 & Y0 and 2 outputs : A1 & A0. Here, the input, Y3 has the highest priority, whereas the input, Y0 has the lowest priority. In this case, even if more than one input is ‘1’ at the same time, the output will be the (binary) code corresponding to the input, which is having higher priority.
What is the truth table of 4 to 2 encoder?
The Truth table of 4 to 2 encoder is as follows : The above two Boolean functions A1 and A0 can be implemented using two input OR gates : The 8 to 3 Encoder or octal to Binary encoder consists of 8 inputs : Y7 to Y0 and 3 outputs : A2, A1 & A0.
What is the truth table for decimal to BCD encoder?
The truth table for decimal to BCD encoder is as follows: The above two Boolean functions can be implemented using OR gates : A 4 to 2 priority encoder has 4 inputs : Y3, Y2, Y1 & Y0 and 2 outputs : A1 & A0. Here, the input, Y3 has the highest priority, whereas the input, Y0 has the lowest priority.