In this project we present sequential and combinational circuit with reversible logic gates which are simulated in Xilinx ISE and by writing the code in VHDL . we have proposed a new design technique of BCD Adde
-The M-S circuit can be changed to respond to the positive clock edge by connecting the slave stage directly to the clock and the master stage to the complement of the clock. -Only 6 NAND gates are needed -Clk=0, 2 & 3 are high, p1=p2=1, keep output ...
Having examined the behavior of some of these sub-circuits (both combinational and sequential) in detail earlier, we now examine their hierarchical combinations, as in real-world systems. All sequential circuits are clocked, while no combinational circuit is clocked. The integration of these two ...
Difference Between Combinational Circuits and Sequential Circuit The following are the key differences between combinational circuits and sequential circuit: S.No.Combinational CircuitsSequential Circuits 1Output depends upon present inputOutput depends upon present and past input ...
Z, the present (external) outputs from the combinational circuit; • Y, the outputs that are fed back into the combinational circuit. Note that the outputs, Y, are fed back via the memory block to become the inputs, y, and that y are called the ‘present state’ variables because the...
The general form of a synchronoussequential circuitis shown inFig. 8.1. To recap, this has: external inputs,A, and outputs,Z; a combinational block which can be considered in two parts; and ‘memory’ in the form of flip-flops. The two parts of the combinational block serve to provide...
Combinational logic 通过current state和input来产生next state和output; Memory有2个input,其中一个是next state,另一个是LOAD控制信号,LOAD来决定什么时候用next state代替current state。 同时包含combinational logic 和Memory的circuit可以称为sequential logic 3.Memory:Using Capacitor or Feedback 那么如何建造一个可...
The basic building block of the combinational circuit haslogic gates, while indeed the basic building block of a sequential circuit is a flip-flop. Flip-flop has a better and greater usage in shift register, counters and memory devices. It is a storage device capable of storing one bit of ...
Asynchronous sequential circuit This is a system whose outputs depend upon the order in which its input variables change and can be affected at any instant of time. Gate-type asynchronous systems are basically combinational circuits with feedback paths. Because of the feedback among logic gates,...
we propose a power macromodeling approach for both combinational and sequential circuits that (1) takes into account the effect of the circuit input switching activity and does not treat the circuit inputs as white noise, (2) takes into account input correlation, both spatial and temporal ...