Phase Lock Loop
Function of PLLs
Phase Lock Loops create a feedback loop in a circuit to control the timing of digital clocks or drift of a signals phase. They can help stabilize crystal generated frequencies and give more flexibility in frequency control. Crystals vary with temperature and therefore using a crystal with a comparator and Voltage Controlled Oscillator (VCO) can improve timing control.
Types of PLL's
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Usage in Circuits
AC
DC
Digital Clock Control
Radios
Related OSE Machines and Technologies
Induction Furnace
Power Cube Controller
Sustainability Metrics
Power efficiency
Material Costs
Labor Costs
Time Costs
Manufacturing Costs
Externalities
Reference Links
https://en.wikipedia.org/wiki/Phase-locked_loop
https://github.com/joshcam/MCU-Based-PLL-for-ARFT/blob/master/README.md
http://hackaday.com/2016/03/23/unlock-the-phase-locked-loop/
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http://archive.arstechnica.com/cpu/1q99/m-clocklock2-1.html
Product links
Related Wiki Pages
http://opensourceecology.org/wiki/Power_Cube/Controller
http://opensourceecology.org/wiki/Induction_Furnace/Bill_of_Materials