This is a simple analog video amplifier and I'm wondering which video amplifier IC could I use to substitute its transistors.
Input should be 0.7Vpp 75ohm video. Output is 4Vpp with about half a volt of DC offset added.
Application: Amplify SCART RGB signal coming out of a videogame console (Video amplitude: 0.7Vpp).

 

Inrersil, Linear Technology, Analog Devices, Maxim, and Texas Instruments all make (or used to make) triple video amplifier chips. However, a 4 Vpp output is not standard, so you would have to check the output compliance of the available chips.

Why is the output voltage requirement so high? Normally it would be 2 Vpp before an output terminator.

Are the input signals real analog video, or just square waves? Driving a monitor with a 4 V signal feels like the monitor is designed for TTL input signals.

ak

 

It's for a CRT consumer TV. I believe it's analog.

 

If the TV has R-G-B inputs on the rear panel, these usually take 1 V video.

ak

 

If the TV has R-G-B inputs on the rear panel, these usually take 1 V video.

ak

The amplified signal goes straight to the neckboard RGB-in, meaning it's going to the tube, there's no Jungle IC in between, that's why the signal needs to be amplified.

 

3 or 4 volts P-P is usually used to drive the cathode driver, which usually found in the neck board.

 

3 or 4 volts P-P is usually used to drive the cathode driver, which usually found in the neck board.

An amplified signal is still needed though. Using 0.7Vpp with the neckboard's RGB will make a CRT go into protection mode. Any recommendations (ICs)?

 

I've been out of that business for over 20 years and don't have an idea of can be had today. Both Motorola (in the 1990's) and National Semiconductor made monolithic video amps. You might start there.

 

Well, I'm once again out of time for this project. I'll leave it be for now and I'll be back when I have spare time. Is there any way for me to put this post in a favorites list or to-do list, something like that? If I just bookmark it, I'll forget it for sure. lol