The .000001% of use cases for a simple passive VGA to HDMI is for when the video source is designed especially to output both VGA and HDMI. In these cases the cable will accompany the video source when you buy it. This is so rare, I almost regret writing this much about it. Analog vs Digital.
Definition - What does Pulse Width Modulation (PWM) mean? Pulse-width modulation (PWM) is a modulation process or technique used in most communication systems for encoding the amplitude of a signal right into a pulse width or duration of another signal, usually a carrier signal, for transmission.
SAN DIEGO -- Pulse, a Technitrol Company (NYSE:TNL), a worldwide leader in electronic component and subassembly design and manufacturing, has introduced the first in a series of SmartER[TM] xDSL high-density, low-pass splitter/filter modules suitable for very-high-bit-rate digital subscriber line (VDSL2) applications.