Next, a process to derive the clock pulse: process(Clk)Ĭlk_pulse Clk, becomes Clk => Clk_pulse. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators. If simulation is started with clock (CLK) at low state, Q and not Q will be at undetermined state and this cannot be exited. Finally, using the JK Flip-Flop, we will create our desired circuit of the 4 Bit Synchronous Up Counter. The 100 k load resistors are not part of the Master-Slave J-K Flip-Flop, their purpose is to help initialize the output to known logic state. D Flip-Flop and with that structure we will create a J-K Flip-Flop. Note that this is simulation-only code, so you can use initial values however you like. This results to a negative-edge-triggered master-slave J-K flip-flop. We can easily shorten the clock pulse width to get rid of these oscillations by adding a new 'pulse' signal, derived from the clock: signal Clk_pulse : std_logic := '0' SIMULATION OF THE CIRCUIT THROUGH MULTISIM from publication: A Novel Approach To Asynchronous State Machine Modeling On. You can now see the oscillations that result from too long a clock pulse in the simulation waveform: Download scientific diagram 4-bit binary counter using J-K flip flops V. To start with, the conventional way to design a JK flip flop in VHDL would look like this: signal Q_s : std_logic
