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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 ...
SDDL—Security Descriptor Definition Language; SDH—Synchronous Digital Hierarchy; SDI—Single-Document Interface; SEC—Single Edge Contact; SDIO—Secure Digital Input Output; SDK—Software Development Kit; SDL—Simple DirectMedia Layer; SDN—Service Delivery Network; SDP—Session Description Protocol; SDR—Software-Defined Radio
Synchronous and asynchronous transmissions are two different methods of transmission synchronization. Synchronous transmissions are synchronized by an external clock, while asynchronous transmissions are synchronized by special signals along the transmission medium.
Counter machine, a subclass of register machines; Counter (digital), an electronic device, mechanical device, or computer program for counting; Loop counter, the variable that controls the iterations of a loop; Jeton, a reckoning counter used on reckoning boards for calculations; Mechanical counter, a digital counter using mechanical components
In programming language theory, semantics is the field concerned with the rigorous mathematical study of the meaning of programming languages. It does so by evaluating the meaning of syntactically valid strings defined by a specific programming language, showing the computation involved. In such a case that the evaluation would be of ...
In digital electronics, a synchronous circuit is a digital circuit in which the changes in the state of memory elements are synchronized by a clock signal. In a sequential digital logic circuit, data is stored in memory devices called flip-flops or latches. The output of a flip-flop is constant until a pulse is applied to its "clock" input ...
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Ideally, clocks in a telecommunications network are synchronous, controlled to run at identical rates, or at the same mean rate with a fixed relative phase displacement, within a specified limited range. However, they may be mesochronous in practice. In common usage, mesochronous networks are often described as synchronous.