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Answer :
Final answer:
The SR-NAND and SR-NOR are two basic types of latches known as Set-Reset (SR) latches. SR-NAND latches are synthesized with NAND gates while SR-NOR latches are synthesized with NOR gates. The next state (Qnext and Qnext') of these latches can be determined by applying the respective truth tables of the latches to the timing diagram.
Explanation:
The SR-NAND and SR-NOR latch are two basic types of latch circuits, with 'SR' meaning 'Set-Reset'. The latch is a circuit with two stable states, able to store one bit of information. These states represent binary output states Q (1) and Q' (0).
An SR-NAND latch is an electronic circuit synthesized using two NAND gates with inputs labeled as 'S' for SET and 'R' for RESET. It delivers output Q and Q'. When S=0, R=1, the latch is SET making output Q=1 and Q'=0. For S=1, R=0 conditions, the latch is RESET making Q=0 and Q'=1. For S=R=1 the output remains the same, meaning the latch HOLDS the previous value. However, S=R=0 is considered an undefined state called a 'Forbidden state'.
The SR-NOR latch is a similar digital circuit except it is synthesized using two NOR gates. For S=R=0, it holds the current state similar to SR-NAND but for S=1, R=0, it sets Q=1 and for S=0, R=1 it resets Q=0. The forbidden state is for S=R=1.
The Qnext and Qnext' values on a timing diagram can be determined by observing the behavior of S and R inputs over time and applying the truth table for respective latches.
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