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Phase-locked loop. A phase-locked loop or phase lock loop ( PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Keeping the input and output phase in lockstep also implies keeping the input and output frequencies the same, thus a phase-locked loop can also track an input frequency.
Printed circuit board of a DVD player. Part of a 1984 Sinclair ZX Spectrum computer board, a printed circuit board, showing the conductive traces, the through-hole paths to the other surface, and some electronic components mounted using through-hole mounting. A printed circuit board ( PCB ), also called printed wiring board ( PWB ), is a medium ...
An electronic lock (or electric lock) is a locking device which operates by means of electric current. Electric locks are sometimes stand-alone with an electronic control assembly mounted directly to the lock. Electric locks may be connected to an access control system, the advantages of which include: key control, where keys can be added and ...
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The North West Parks Board is a governmental organisation responsible for the management of protected areas and public nature reserves in North West Province, South Africa . The different reserves are scattered throughout the province, each with its unique features. Activities within the reserves are available for educational, recreation and ...
Otherwise they just wouldn’t have survived this way.” The bottles were found only because Mount Vernon is doing a $40 million revitalization project of the mansion that they expect to be ...
Georgia's State Election Board voted Tuesday to require county election officials to make a “reasonable inquiry” before certifying election results to the state, signaling that fights about ...
Here's how you can save yourself as much as $820 annually in minutes (it's 100% free) 'You didn't want to risk it': 80-year-old woman from South Carolina is looking for the safest place for her ...