![]() Design a 2 bit up/down counter with an input D. The decision to count up or down is made by the value of the input signal w. Types 4 bit synchronous up counter: In the up counter the 4 bit binary sequence starts from 0000 and increments up to 1111, i.e from 0 to 15. Describe a general sequential circuit in terms of its basic parts and its input and outputs. The state of the counter is represented in 2-bits, and so is stored in 2 flip-flops (or latches). The JB and KB inputs are connected to QA. It is also called a 2-bit counter because the numbers from 0.3 can be represented using 2-bits (e.g. By connecting the output of the first FF to the clock of the second, the two toggle FFs become a 2-bit ripple counter. 2-bit Synchronous up counter The JA and KA inputs of FF-A are tied to logic 1. When this output from counter is fed as input (n bit) to decoder one out of 2 n output lines will be. But the bottom schematic's FF is negative edge triggered and the clock label should be \$ \overline \$ to D, the connection causes the FF to toggle at the active clock edge. Binary counter of n bits can count up to 2 n numbers. A0 A1 A2 A3 Clock input Binary Ripple Counter MOD 16. up/down:This indicates if the counter will be counting up or counting down. jumlah bit input Contoh: Counter MOD 8 ada 3flip-flop. tRC16tFA166ps96ps (d) Design a 16-bit carry-lookahead adder using blocks of size k4 and calculate its total delay. input:A 2-bit number that will be used to load a value into the counter. (c) Calculate the total delay of a16-bit ripple-carry adder based on the given library timing specs. The convention for the clock of FF is positive edge triggered (output change on positive edge). We can implement a 1-bit full adder using 9 2-input NAND gates. Your second schematic is almost a direct replacement of the DFF in the first schematic.
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