| 摘要 |
<p>A power supply for powering at least one light emitting diode (LED) with AC voltage comprises an AC input line, a step-down impedance, a rectifier, a low pass filter, and a current regulator. The AC voltage is carried through the AC input line to the step-down impedance, which attenuates the voltage. The rectifier subsequently rectifies the voltage while the lower pass filter removes ripple from the rectified voltage. The current regulator converts the rectified voltage into a substantially constant supply of DC current that is delivered to the LED.</p> |
