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A project log for AMD HD3D + shutterglasses on a 3D Vision monitor

(formerly: DVI Sync Extractor)

sandervSanderV 06/23/2014 at 20:450 Comments

We want a high-impedance (un-terminated) receiver, which is hard to find. All chips I've found that are designed specifically for DVI have internal termination resistors that can't be turned off during operation.

The Analog Devices ADV3003 seems to come to the rescue though. It's a DVI equalizer/buffer that passes through the raw DVI signals with some quality improvement. Like the others, it has internal 50 Ohm termination resistors - however these are connected to an independent power supply pin. So I should be able to just leave that supply unconnected, making this device act like an impedance transformer of sorts.

For the actual deserializing of the data stream I've chosen the Texas Instruments TFP401A chip. It's nice and simple - unlike some others it doesn't need to be controlled by a I2C bus but simply works standalone. It has a VSYNC output.

The next step is to combine these two parts and the necessary supplies and output buffering into a neat little PCB design.

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