EEVblog #306 - Jim Williams Pulse Generator

[G7PSK]

I think the new job was mentioned on the Amp-hour a while back. something to do with Tesla I believe.

[VintageTekFan]

this thing has been slipping , vacation , changing jobs , remodelling the lab..

I hope the job change was for the better!

[AwArD_RzD]

Count me in for a kit !

[msraya]

I'm interested also in one unit.
Please send me some information when you can..

I have a Agilent MSO9404 Scope wandered here in the lab with some 4GHz bandwidth that I want to test 

Thank You for the good job!

Regards
Manuel

[free_electron]

changing jobs

Thanks!

What is new job?  Please fill us in.

i am now lead PCB designer at Tesla motors.

[alank2]

i am now lead PCB designer at Tesla motors.

Excellent! 

[Gixy]

Hi Vince,
I confirm my interest for one kit, I just bought your book on SMT to improve my skills on these little things  . I just had a PM on my profile.
I'm an old reader as I already had your first book on Electronic with VB!
Thanks a lot and wish you all the best in your new job. Great cars!

[VintageTekFan]

i am now lead PCB designer at Tesla motors.

Awesome 

[Dave]

i am now lead PCB designer at Tesla motors.

Nice!

[dr.diesel]

i am now lead PCB designer at Tesla motors.

 


We all know Tesla is on the cutting edge and has lots to protect, but hopefully you'll be able to share some of the coolness with us. 

[etl17]

+1 for a kit (if it's not too late!)....

[croyleje]

Hi Everyone,
I have built a pulser similar to the original design the one i build is from AN61 Triggered 250PS Rise Time Pulse.  The reason I went with this design is so I could have a manual trigger single pulse but I have tried using a simple momentary push button but the switch bounce is giving me issues and when I tried putting some debounce in the circuit I believe it was the cap that then caused issues.  Looking for a simple idea on how I could trigger a single very fast pulse for testing my scopes and other things in the future?  No real reason I only want to be able to trigger the single pulse just like that idea more then the repetitive pulse of the original.
Thanks Jason

http://cds.linear.com/docs/en/application-note/an61fa.pdf

couldn't post whole pdf here is link page 21 and 22

[vasilistzo]

+1 kit please for me .
I ve been reading all the posts since 2012 for the last few hours.

[motocoder]

i have receive about a hundred bare boards. this thing has been slipping , vacation , changing jobs , remodelling the lab..
i  need to pick this up again. lemme do some homework tonite.

If it's not too late, please mark me down for one kit.

Congrats on your new job, too.

[AlessandroAU]

Does any know what changes I could try make to make the top of my pulse flatter?

[marshallh]

Get a scope with more bandwidth?

That's a pretty good result for a 1Meg input with I assume a feedthru termination

[Jay_Diddy_B]

Does any know what changes I could try make to make the top of my pulse flatter?

Can you post your schematic and a photograph of your circuit?

And have a look a the pdf document attached to this post:

https://www.eevblog.com/forum/projects/transmission-line-avalanche-pulse-generator/msg185639/#msg185639

Regards,

Jay_Diddy_B

[AlessandroAU]

Does any know what changes I could try make to make the top of my pulse flatter?

Can you post your schematic and a photograph of your circuit?

And have a look a the pdf document attached to this post:

https://www.eevblog.com/forum/projects/transmission-line-avalanche-pulse-generator/msg185639/#msg185639

Regards,

Jay_Diddy_B

The pulse generator uses a 2n2369 with a 1pf tank cap and 1m of semi rigid coax.

Are the waves in the top of the pulse caused by internal reflections past the 50ohm feedthrough terminator?

[Jay_Diddy_B]

Hi,
Some of what you are seeing is the scopes performance. The top of the screen says 1G sample per second and 60 points. I assume that there are only 60 samples for the information displayed. The scope is joining the dots between the samples. I don't know if the Rigol scope has an option to highlight the data points or turn off the vectors.

If you turn on a second channel, the sample rate, per channel will drop to 500 Ms/s, and see if this changes your waveform.

This scope picture from my TDS744A converted to a TDS784A has 100 G samples per second, equivalent time, so there is 100 time more information used build the waveform. This requires a repetitive waveform to acquire all the samples.





Regards,

Jay_Diddy_B

[Gixy]

No news from Vincent concerning kits' availability? He seems to be very busy testing DEX 

[silicon_ghost]

On the slim chance I can still get one...

+1 kit for me please

[moocow]

Probably a long shot, but any way to get one of these still?

[DarthBubba]

Once again, late to the dance...   

@Free_Electron, any pulse generator kits still available?  I'm here in the 'States so mailing/customs would not be a problem.   

PM/email also sent to you.

Thanks,

[dadler]

Can someone just post a gerber or put the layout on OSHPark?

I searched and couldn't find the layout anywhere.

[HighVoltage]

Can someone just post a gerber or put the layout on OSHPark?

I searched and couldn't find the layout anywhere.

+1
I am also really interested in that oine.
Thanks to anyone that can help with this.