This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Understanding the schematic on the official datasheet of the THS7314

Other Parts Discussed in Thread: THS7314, THS8200

Hi guys,

I believe many of you will think I'm pretty dumb because of this question but I really would like to understand the THS7314 and the datasheet isn't really enough for me to get it. I often use it to amp the RGB output of old consoles that don't have native RGB output.

I'm trying to amp the RGB output on the Pioneer LaserActive Sega Pack. 

The thing is there's a short circuit on the THS7314 official datasheet?

I've marked in red. If you hook GND and the voltage with the input you get a short circuit. 

So can anyone explain to me how this input works?

If I'm trying to amp just a single channel like a stripped sync. I should couple it using a 0.1nf caps in line and what? Add 5v together with sync on the input?

A resistor to the GND? What size of resistor?

Thanks to anyone that got time to read and reply this dumb question.

  • Hello Vitor,

    I am not sure I understand your question, but it appears that the 3.3V is the power supply for the THS8200 DAC.  They are using the THS8200 as an example of a video DAC that would be converted to compostie or S-Video.  The 3.3V and ground connections are just showing that the THS8200 runs on 3.3V. 

    I think you can just route your video signals into the THS7314.  The THS7314 takes ground referenced video signals (-0.1 to 1.46V) so you may not even need a coupling capacitor depending on your sync levels.   So, there is no need for any resistors or power on the THS7314 inputs.  

    The THS7314 works on 3V to 5V, so you can use a 3.3V supply for it.