Amateur Extra › E7 Practical Circuits › E7D02
E7D02
How does a switchmode voltage regulator work?
Pick an answer to check it.
Answer: B. By varying the duty cycle of pulses input to a filter
A switchmode regulator switches the input on and off rapidly and varies the duty cycle of those pulses. A filter smooths the pulses into a steady DC output.
Tip: Switcher: vary the duty cycle, then filter.