Do we need to ground the unused input for OR gate?
To ensure that the gates are not left floating they should be connected either to ground or to the supply rail. Often it will not matter which is used, unless it is an input on a used function when the required input, either high or low would mean connecting it to the supply rail or ground respectively.
Can OR gate have more than 2 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.
What is design procedure of combinational circuit?
Design procedure Determine required number of inputs and outputs from the specifications. Derive the truth table for each of the outputs based on their relationships to the input. Simplify the boolean expression for each output. Draw a logic diagram that represents the simplified Boolean expression.
When does a circuit retain the last value of input?
Thus, when \\ (S=0\\) the circuit retains the last value of input \\ (D\\) before \\ (S\\) transitions from 1 to 0. We know this behavior from the D-latch already. Now, we utilize the tools for combinational circuit design, including K-maps and timing analysis, to study the feedback loop in more detail.
How is a decoder used in a combinational circuit?
A Decoder is a combinational circuit that converts binary information from input lines to unique output lines. Apart from the Input lines, a decoder may also have an Enable input line.
Which is an example of a sequential circuit?
We construct a sequential circuit by introducing a feedback loop. For example, we may connect the output of a combinational circuit to one of its inputs, as shown in Figure 6.1. This multiplexer circuit feeds output \\ (Y\\) back to data input \\ (D_0.\\)
Which is input does a multiplexer circuit control?
The input A of this simple 2-1 line multiplexer circuit constructed from standard NAND gates acts to control which input ( I 0 or I 1 ) gets passed to the output at Q.
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