Introduction to sequential logic from "summary" of Electronics - Circuits and Systems by Owen Bishop
Sequential logic is a fundamental concept in electronics that plays a crucial role in the design and operation of digital circuits. It differs from combinational logic in that it involves memory elements, such as flip-flops, which store information about the circuit's past states. This ability to "remember" past inputs allows sequential logic circuits to exhibit behavior that depends not only on the current inputs but also on the sequence of inputs received over time. One of the key components of sequential logic is the flip-flop, a bistable circuit element that can be in one of two stable states: 0 or 1. The output of a flip-flop is determined by its current state and the input signals it receives. When the input signals change, the flip-flop's output may change as well, depending on the specific logic function implemented by the circuit. Sequential logic circuits can be broadly classified into two categories: synchronous and asynchronous. In synchronous circuits, all flip-flops are clocked simultaneously by a common clock signal, ensuring that all changes in state occur at predefined times. This clocking mechanism simplifies the design and analysis of sequential circuits but may intr...
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