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Mealy machine. In the theory of computation, a Mealy machine is a finite-state machine whose output values are determined both by its current state and the current inputs. This is in contrast to a Moore machine, whose output values are determined solely by its current state. A Mealy machine is a deterministic finite-state transducer: for each ...
A 4-bit synchronous counter using JK flip-flops. In a synchronous counter, the clock inputs of the flip-flops are connected, and the common clock simultaneously triggers all flip-flops. Consequently, all of the flip-flops change state at the same time (in parallel). For example, the circuit shown to the right is an ascending (up-counting) four ...
Frequency divider. A frequency divider, also called a clock divider or scaler or prescaler, is a circuit that takes an input signal of a frequency, , and generates an output signal of a frequency: where is an integer. Phase-locked loop frequency synthesizers make use of frequency dividers to generate a frequency that is a multiple of a ...
In the worst case, depending on timing, the metastable condition at D s can propagate to D out and through the following logic into more of the system, causing undefined and inconsistent behavior. In electronics, metastability is the ability of a digital electronic system to persist for an unbounded time in an unstable equilibrium or metastable ...
synchronous 8-bit up/down counter, asynchronous clear 24 SN74ALS867A: 74x869 1 synchronous 8-bit up/down counter, synchronous clear 24 SN74ALS869: 74x870 1 dual 16x4 register files 24 SN74AS870: 74x871 1 dual 16x4 register files 28 SN74AS871: 74x873 2 dual 4-bit transparent latch with clear three-state 24 SN74ALS873B: 74x874 2
In electrical engineering, a synchronous condenser (sometimes called a syncon, synchronous capacitor or synchronous compensator) is a DC-excited synchronous motor, whose shaft is not connected to anything but spins freely. [1] Its purpose is not to convert electric power to mechanical power or vice versa, but to adjust conditions on the ...
Induction generator. An induction generator or asynchronous generator is a type of alternating current (AC) electrical generator that uses the principles of induction motors to produce electric power. Induction generators operate by mechanically turning their rotors faster than synchronous speed. A regular AC induction motor usually can be used ...
Asynchronous circuit ( clockless or self-timed circuit) [1] : Lecture 12 [note 1] [2] : 157–186 is a sequential digital logic circuit that does not use a global clock circuit or signal generator to synchronize its components. [1] [3] : 3–5 Instead, the components are driven by a handshaking circuit which indicates a completion of a set of ...