I have a project for work I am mulling over. At first it seemed easy, until I found out some specifics.
I need to detect when a 0.2ns pulse exceeds a specific level, around 4 or 5 volts. I also need to make a simple calibrator box capable of generating similar style pulses to make sure the first box is working.
This is a simple Go/No Go project, if it does not see the pulse the light stays green. If it sees something the light shows red. So a simple latch and hold is in order.
My current thought is ECL logic, but I am not sold on the idea. Anything that works is good enough. Basically I will have SMT components on a small PC board hanging directly off the BNC connector (required).
Right now we are using a really nice LCD HP oscope to detect these pulses. They are expensive, and not operator (as in non technical personnel) friendly. The box would signal when it is time to get maintenance/engineering involved.
Other design considerations were easy, and I have basically drawn them up. A 10 second on time from a simple push button, 9V battery (if needed we can use other batteries), low battery voltage indicator. I have finished drawing this part, it was a no brainer. I have also incorporated a variable power supply voltage since this project will require a basic magnitude detection, and I haven't gotten a handle what the final circuitry will look like.
I will post those schematics up later.
I need to detect when a 0.2ns pulse exceeds a specific level, around 4 or 5 volts. I also need to make a simple calibrator box capable of generating similar style pulses to make sure the first box is working.
This is a simple Go/No Go project, if it does not see the pulse the light stays green. If it sees something the light shows red. So a simple latch and hold is in order.
My current thought is ECL logic, but I am not sold on the idea. Anything that works is good enough. Basically I will have SMT components on a small PC board hanging directly off the BNC connector (required).
Right now we are using a really nice LCD HP oscope to detect these pulses. They are expensive, and not operator (as in non technical personnel) friendly. The box would signal when it is time to get maintenance/engineering involved.
Other design considerations were easy, and I have basically drawn them up. A 10 second on time from a simple push button, 9V battery (if needed we can use other batteries), low battery voltage indicator. I have finished drawing this part, it was a no brainer. I have also incorporated a variable power supply voltage since this project will require a basic magnitude detection, and I haven't gotten a handle what the final circuitry will look like.
I will post those schematics up later.