DRS4 Forum
  DRS4 Discussion Forum  Not logged in ELOG logo
Entry  Thu Mar 31 19:30:26 2016, Abaz Kryemadhi, Trigger on the And of a positive and negative signal 
    Reply  Thu Mar 31 19:35:06 2016, Stefan Ritt, Trigger on the And of a positive and negative signal 
       Reply  Thu Mar 31 19:44:38 2016, Abaz Kryemadhi, Trigger on the And of a positive and negative signal 
          Reply  Thu Mar 31 20:34:25 2016, Stefan Ritt, Trigger on the And of a positive and negative signal 
             Reply  Thu Mar 31 20:38:05 2016, Abaz Kryemadhi, Trigger on the And of a positive and negative signal 
                Reply  Thu Mar 31 20:48:00 2016, Chris Thompson, Trigger on the And of a positive and negative signal 
                   Reply  Fri Apr 1 01:30:40 2016, Abaz Kryemadhi, Trigger on the And of a positive and negative signal 
                      Reply  Fri Apr 1 22:09:07 2016, Chris Thompson, Trigger on the And of a positive and negative signal 
                         Reply  Sat Apr 2 17:22:34 2016, Abaz Kryemadhi, Trigger on the And of a positive and negative signal 
                            Reply  Sun Apr 3 22:10:19 2016, Chris Thompson, Trigger on the And of a positive and negative signal Pulse_inverter.jpg
                               Reply  Sun Apr 3 22:34:28 2016, Abaz Kryemadhi, Trigger on the And of a positive and negative signal 
Message ID: 499     Entry time: Sun Apr 3 22:34:28 2016     In reply to: 498
Author: Abaz Kryemadhi 
Subject: Trigger on the And of a positive and negative signal 

Thanks, great!

Chris Thompson wrote:

No there are no other components. I put a photo of the inverter with its cables SMA and one end, BNC at the other. You can see it is very small. I glued the inverter to a piece of thin plywood, and fixed the cables to it before attempting to solder them to the pads on the ferite bead support

Abaz Kryemadhi wrote:

Thanks again,   this is very useful,  just another question did you put any other passive elements in the circuit for inverting the signal or just simply swaped the transformer connections? 

Chris Thompson wrote:

The coilcraft part number is: JA4220-ALB. Iordered two of them and they were sent as free samples. You might want to buy some slightly bigger ones. I found them so small it was very hard to solder the coax cable to the connectors. Since I got them, I managed to damage one as they are quite fragile! In the confirmation email I got there was some contact info which may be useful for you: "For help, contact Victoria Berner at 847-516-5551  vberner@coilcraft.com "  BTW every time I use this forum I'm told that my password is not valid. Each time I reset it according to the "Lost pasword preceedure. Then I can log on again. Its quite annoying.

Abaz Kryemadhi wrote:

Hi Chris,

 I am looking at Sensl SiPMs as well,  can you send the part number from Coilcraft?

Thanks!

Abaz

Chris Thompson wrote:

I needed a fast pulse inverter in order to feed signals from the recent SensL SiPMs into a conventional CFD which only accepted negative signals. I got a very small ferite torridal transformer from Coilcraft and wired up to invert signals then inserted into in 50 ohm coax cable and it works fine. These things cost only a few cents each!

Abaz Kryemadhi wrote:

Thanks, that looks just fine.

Stefan Ritt wrote:

Here is one (SI 100): https://www.picoquant.com/products/category/accessories/adapters-splitters-cables-various-accessories-for-photon-counting-setups

Abaz Kryemadhi wrote:

Ok, thanks!  do you know an easy in-line inverter like mini-circuit or digikey?    Can also redesign the detector I gues to produce positive signals, just it might be easier if there was a simple inverter if you are aware of? thanks Abaz

Stefan Ritt wrote:

No. You have to use an inverter for one of your signals.

Stefan

Abaz Kryemadhi wrote:

I would like to be able to trigger in this fashon:  channel 0 > 0.1 and. channel 1< -0.1,  because I have a positive and a negative signal.  Can DRS4 (5) Eval board do this kind of trigger?

Thanks!

Abaz

 

 

 

 

 

 

 

 

 

 

ELOG V3.1.4-80633ba