![]() Unlike the Master-Slave design, which needs a complete pulse, you can also build an edge-triggered design that triggers from a rising edge ↑ or a falling edge ↓. If you simulate purely digital models in Multisim Live try to create at least one analog voltage in yout circuit which is referenced to 0 (GND). Counter to 7 Segment Display with JK Flip-flops and Logic Gates. 04-26-2020 05:40 AM Options It looks like the simulation engine needs a GND reference to perform digital to analog node conversion properly. NI Multisim Live lets you create, share, collaborate, and discover circuits and electronics online with SPICE simulation included. Toggle case means that when the count signal come to the flip-flop, the output of that flip-flop, which is Q (we can use Q-bar as an alternative, because Q-bar is just the opposite of Q), changes to logic 1 if it was logic 0, or vice-versa. NI Multisim Live lets you create, share, collaborate, and discover circuits and electronics online with SPICE simulation included. That’s why this configuration is called pulse-triggered JK Flip-Flop. The J-K flip flops must be in the toggle case for this purpose. So this circuit requires a complete pulse (0→1 →0) in order to change the output. Once the clock signal produces a falling edge ↓, a change from 1 to 0 (1→0), it triggers the slave section, causing the Q output to reflect the master’s output value. These signals are connected to the slave section, but this doesn’t trigger on the rising edge because the clock has been inverted. As a result, the value of the outputs in this section changes. As soon as the clock makes a rising edge ↑, which is a change from 0 to 1 (0→1), it triggers the master section.
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