T Flip Flop Block Diagram. To design a synchronous up counter first we need to know what number of flip flops are required. To create a t flip flop using jk the inputs are given as t flip flop inputs and the outputs are taken from the jk flip flop.
However in row 5 both inputs are 0 which makes both q and q 1 and as they are no longer opposite logic states although this state is possible in practical circuits it is not allowed. For conditions 1 to 4 in table 521 q is the inverse of q. Its logic diagram can be given as.
And the output remains unchanged or hold.
These are the following steps to design a 4 bit synchronous up counter using t flip flop. The logic diagram of a 2 bit asynchronous up counter using jk flip flop is shown in the figure. J t k t. The circuit of the sr flip flop using the nand gate is shown below.