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  2. Sequential logic - Wikipedia

    en.wikipedia.org/wiki/Sequential_logic

    That is, sequential logic has state (memory) while combinational logic does not. Sequential logic is used to construct finite-state machines, a basic building block in all digital circuitry. Virtually all circuits in practical digital devices are a mixture of combinational and sequential logic. A familiar example of a device with sequential ...

  3. Asynchronous circuit - Wikipedia

    en.wikipedia.org/wiki/Asynchronous_circuit

    All digital logic circuits can be divided into combinational logic, in which the output signals depend only on the current input signals, and sequential logic, in which the output depends both on current input and on past inputs. In other words, sequential logic is combinational logic with memory. Virtually all practical digital devices require ...

  4. Switching circuit theory - Wikipedia

    en.wikipedia.org/wiki/Switching_circuit_theory

    Switching circuit theory is the mathematical study of the properties of networks of idealized switches. Such networks may be strictly combinational logic, in which their output state is only a function of the present state of their inputs; or may also contain sequential elements, where the present state depends on the present state and past states; in that sense, sequential circuits are said ...

  5. Contamination delay - Wikipedia

    en.wikipedia.org/wiki/Contamination_delay

    "Understanding Sequential Circuit Timing" (PDF). Department of Computer and Electrical Engineering, University of Massachusetts Amherst. Archived from the original (PDF) on 2016-03-03. "Spring 2004 handout L04-4, Computation Structures (class 6.004)" (PDF). MIT Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of ...

  6. Algorithmic state machine - Wikipedia

    en.wikipedia.org/wiki/Algorithmic_State_Machine

    The algorithmic state machine (ASM) is a method for designing finite-state machines (FSMs) originally developed by Thomas E. Osborne at the University of California, Berkeley (UCB) since 1960, [1] introduced to and implemented at Hewlett-Packard in 1968, formalized and expanded since 1967 and written about by Christopher R. Clare since 1970.

  7. Register-transfer level - Wikipedia

    en.wikipedia.org/wiki/Register-transfer_level

    The synthesis tool also performs logic optimization. At the register-transfer level, some types of circuits can be recognized. If there is a cyclic path of logic from a register's output to its input (or from a set of registers outputs to its inputs), the circuit is called a state machine or can be said to be sequential logic.

  8. State-transition table - Wikipedia

    en.wikipedia.org/wiki/State-transition_table

    In automata theory and sequential logic, a state-transition table is a table showing what state (or states in the case of a nondeterministic finite automaton) a finite-state machine will move to, based on the current state and other inputs.

  9. Timing closure - Wikipedia

    en.wikipedia.org/wiki/Timing_closure

    The Timing closure in VLSI design and electronics engineering is the process by which a logic design of a clocked synchronous circuit consisting of primitive elements such as combinatorial logic gates (AND, OR, NOT, NAND, NOR, etc.) and sequential logic gates (flip flops, latches, memories) is modified to meet its timing requirements.