SR latch timing diagram or waveform with delay, help!
In the first timing diagram, when S becomes 1, after 10ns QN becomes 0, and 10ns later Q becomes 1. Now, draw the S-R latch with NOR gates, write initial values near corresponding letters (S=0, R=0, Q=0, QN=1), change S to 1, and try to understand what changes you see. If you struggle, look at the timing diagram you shared.
Forbidden S-R Latch Timing Diagram
Oct 23, 2013 · 3 Answers. The forbidden state is not a specific logic level. The value of Q during the forbidden state depends on how the latch is implemented (whether with NAND gates or NOR gates, for example). There are two reasons why a particular input state may be considered forbidden. First, it may cause both Q and !Q to have the same value, which can ...
Question on timing diagram of a SR Latch with different gate delays
May 19, 2021 · \$\begingroup\$ In the real-world, most synthesis tools will not allow you to model a latch with combinatorial feedback and SR inputs will never change both instantaneously and simultaneously. All signals are analog and you have look at timing windows for what is called metastability. \$\endgroup\$ –
logic gates - How to determine timing delay of SR-Latches?
Jun 12, 2017 · Depending on the arc, the delay will be either straight through the gate to the output (one gate delay), or it will first go through one gate and through the next to show up at the other output. SET input (2) goes high. 1.4 ns later Q' (3) goes high. This turns off the input to the lower NOR gate at (4). 1.4 ns later Q (5) turns on.
digital logic - What is race condition in flip-flops? - Electrical ...
Apr 18, 2019 · The race condition is that, from a 00 input state, one input changes to 0, and the second one also changes to 0 before the effect of the first change has setteled. Now the effects of the two changes are 'racing' for priority. The explanation stated is for a simple Set-Reset FF (or latch, or how you want to call it).
digital logic - How to understand the SR Latch - Electrical …
Mar 19, 2013 · As supercat commented if one pin is unasserted before the other the SR latch can enter a known state because only one pin is being asserted. Other types of latches/flip flops may define a different behavior, for example JK flip-flops define asserting both pins to toggle the outputs (Q = ~Qprev, ~Q = Qprev).
digital logic - How does an RS-latch work in the presence of ...
Jun 22, 2018 · The delay for the change in Q and /Q to be fed back to the RS latch. This is part 2 of the propagation delay. The delay for the cross-over feed-back to propagate though the gates internal logic and 'latch' in the new state. At this time the propagation delay is over. You are now in state t1+E with the outputs being Q=0 and /Q=1.
Logic gate diagram for JK latch? (Not flip-flop)
Oct 4, 2018 · From : JK latch is similar to RS latch. This latch consists of 2 inputs J and K as shown in the below figure. The ambiguous state has been eliminated here: when the inputs of Jk latch are high, then output toggles. The output feedback to inputs is the only difference we see here, which is not there in the RS latch. Compared to the JK flip-flop:
Making sense of NAND latch circuit diagram
Sep 23, 2024 · Then let's temporarily store the NOT1 output voltage across a capacitor C. Now, when the reverse value is "1", the capacitor is charged to 5 V. When we push the SW button, a logic "1" is applied to the latch. simulate this circuit. Conversely, when the reverse value is "0", the capacitor is charged to 0 V.
Waveform of a SR Latch - Electrical Engineering Stack Exchange
Apr 30, 2020 · 1. The input's three gates ensure that only 'S' or 'T' can be high at any one time. If 'S' is taken high then 'V' should latch high. If 'T' is taken high then 'U' should latch high. That is to say, taking an input ('S' or 'T') high forces the opposite gate's output to latch high. So, the 'U' & 'V' labels on the timing diagram should be swapped ...