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--- glossary:glossary_p [2021/08/08 01:09] – [Pulse Width Modulation] Wayne
+++ glossary:glossary_p [2021/08/08 05:25] (current) – Changed the entry to PM Wayne
@@ Line 54: / Line 54: @@
 [[wp>Polylactic_acid|Polylactic Acid]] a plastic used in 3D printing\\
 [[wp>Programmable_logic_array|Programmable Logic Array]] a kind of programmable logic device used to implement combinational logic circuits.
-===== PM - Phase Modulation =====
+===== PM =====
+====  Phase Modulation ====
 Phase Modulation. A specialist modulation mainly used in Radar equipment, the phase rather than the frequency of the carrier wave is varied in order to obtain information
-===== PM - Pulse Modulation =====
+==== Pulse Modulation ====
@@ Line 192: / Line 193: @@
-===== PWM - Pulse Width Modulation =====
+===== PWM =====
 Pulse Width Modulation is a technique used to control devices such as motors and lights to vary the amount of power supplied to the device. The power supply to the device is switched between off and on such that the average power to the device can be varied between 0% - always off to 100% - always on. For example if the wave form is switched so that a motor is connected to power supply for 75% of the time then it will receive approximately 75% power and run at a slower speed. The frequency at which the switching takes place will affect the behaviour of the motor but is typically between 100Hz and 20KHz.