In electronics and especially synchronous digital circuits, a clock signal (historically also known as logic beat[1]) is an electronic logic signal (voltage or current) which oscillates between a high and a low state at a constant frequency and is used like a metronome to synchronize actions of digital circuits. In a synchronous logic circuit, the most common type of digital circuit, the clock signal is applied to all storage devices, flip-flops and latches, and causes them all to change state simultaneously, preventing race conditions.
A clock signal is produced by an electronic oscillator called a clock generator. The most common clock signal is in the form of a square wave with a 50% duty cycle. Circuits using the clock signal for synchronization may become active at either the rising edge, falling edge, or, in the case of double data rate, both in the rising and in the falling edges of the clock cycle.
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especially synchronous digital circuits, a clocksignal (historically also known as logic beat) is an electronic logic signal (voltage or current) which oscillates...
Now Clocksignal (digital circuits) Clockkeeper Clockmaker Colgate Clock (Indiana) Colgate Clock (New Jersey), largest clock in US Corpus Clock Cosmo...
A clock generator is an electronic oscillator that produces a clocksignal for use in synchronizing a circuit's operation. The signal can range from a...
radio controlled clock. The radio controlled clock will contain an accurate time base oscillator to maintain timekeeping if the radio signal is momentarily...
with some number of peripheral (sub) devices by driving the clocksignal and chip select signal(s). Motorola's original specification (early 1980s) uses...
clocksignal is a special digital signal that is used to synchronize many digital circuits. The image shown can be considered the waveform of a clock...
sourced clocksignal arrives at different components at different times due to gate or, in more advanced semiconductor technology, wire signal propagation...
frequency). The clock distribution network inside the CPU carries that clocksignal to all the parts that need it. An A/D Converter has a "clock" pin driven...
driven by a clocksignal and, because of its periodic nature, has an unavoidably narrow frequency spectrum. In fact, a perfect clocksignal would have...
electronics, a word clock or wordclock (sometimes sample clock, which can have a broader meaning)[further explanation needed] is a clocksignal used to synchronise...
these early synchronous CPUs ran at low clock rates compared to modern microelectronic designs. Clocksignal frequencies ranging from 100 kHz to 4 MHz...
design a clock domain crossing (CDC), or simply clock crossing, is the traversal of a signal in a synchronous digital circuit from one clock domain into...
creates a signal with very precise frequency, so that quartz clocks and watches are at least an order of magnitude more accurate than mechanical clocks. Generally...
MIDI beat clock, or simply MIDI clock, is a clocksignal that is broadcast via MIDI to ensure that several MIDI-enabled devices such as a synthesizer or...
the transference of clocksignals over the Ethernet physical layer. This signal can then be made traceable to an external clock. The aim of Synchronous...
operated chimes on public clocks; however, audible signals (even signal guns) have limited range. Busy seaports used a visual signal, the dropping of a ball...
true periodicity of a presumably periodic signal, often in relation to a reference clocksignal. In clock recovery applications it is called timing jitter...
own local clock is not precisely synchronized with the transmitter, they may sample the signal at the wrong time and thereby decode the signal incorrectly...
slave clock is a clock that depends on another clock, the master clock. Modern clocks are synchronized through the Internet or by radio time signals, to...
processors. The clocksignal must be distributed to every flip-flop in the circuit. As the clock is usually a high-frequency signal, this distribution...
the clock signal when the circuit, or a subpart of it, is not in use or ignores clocksignal. Clock gating saves power by pruning the clock tree, at the...
An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on atoms having different energy levels. Electron...
edges of the clocksignal) to double data bus bandwidth without a corresponding increase in clock frequency. One advantage of keeping the clock frequency...