Empathy List Archives

LM

Larry McDavid

Tue, Oct 10, 2017 7:19 PM

There has been discussion recently about generating fast rise/fall time
pulses by various means. Here is a link to a Leo Bodnar device that will
provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses:

http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=124&products_id=295

This is built on a small PWB with integral BNC connector, powered by 5
vdc through a USB B connector; a trigger output is provided. Price is US$68.

I've ordered one of these for testing.

Is anyone here using one of these?

--
Best wishes,

Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)

There has been discussion recently about generating fast rise/fall time pulses by various means. Here is a link to a Leo Bodnar device that will provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses: http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=124&products_id=295 This is built on a small PWB with integral BNC connector, powered by 5 vdc through a USB B connector; a trigger output is provided. Price is US$68. I've ordered one of these for testing. Is anyone here using one of these? -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland)

BC

Brooke Clarke

Tue, Oct 10, 2017 7:42 PM

Hi Larry:

How does it work.
When I was working with microwave semis it was either a tunnel diode or a Step Recovery Diode.

--
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

-------- Original Message --------

There has been discussion recently about generating fast rise/fall time pulses by various means. Here is a link to a
Leo Bodnar device that will provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses:

http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=124&products_id=295

This is built on a small PWB with integral BNC connector, powered by 5 vdc through a USB B connector; a trigger output
is provided. Price is US$68.

I've ordered one of these for testing.

Is anyone here using one of these?

Hi Larry: How does it work. When I was working with microwave semis it was either a tunnel diode or a Step Recovery Diode. -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html -------- Original Message -------- > There has been discussion recently about generating fast rise/fall time pulses by various means. Here is a link to a > Leo Bodnar device that will provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses: > > http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=124&products_id=295 > > This is built on a small PWB with integral BNC connector, powered by 5 vdc through a USB B connector; a trigger output > is provided. Price is US$68. > > I've ordered one of these for testing. > > Is anyone here using one of these? >

BA

Bob Albert

Tue, Oct 10, 2017 8:08 PM

I built one, and later saw a simpler one. Very fast, very simple. I think my total cost was a few cents.
Google TDR DIY pulser. One from an old magazine (Jim Williams) looks pretty good, using collector breakdown of a 2N2369. The one I made used one IC and a few resistors.

Bob

On Tuesday, October 10, 2017 1:02 PM, Brooke Clarke <brooke@pacific.net> wrote:

Hi Larry:

How does it work.
When I was working with microwave semis it was either a tunnel diode or a Step Recovery Diode.

--
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

-------- Original Message --------

There has been discussion recently about generating fast rise/fall time pulses by various means. Here is a link to a
Leo Bodnar device that will provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses:

http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=124&products_id=295

This is built on a small PWB with integral BNC connector, powered by 5 vdc through a USB B connector; a trigger output
is provided. Price is US$68.

I've ordered one of these for testing.

Is anyone here using one of these?

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

I built one, and later saw a simpler one. Very fast, very simple. I think my total cost was a few cents. Google TDR DIY pulser. One from an old magazine (Jim Williams) looks pretty good, using collector breakdown of a 2N2369. The one I made used one IC and a few resistors. Bob On Tuesday, October 10, 2017 1:02 PM, Brooke Clarke <brooke@pacific.net> wrote: Hi Larry: How does it work. When I was working with microwave semis it was either a tunnel diode or a Step Recovery Diode. -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html -------- Original Message -------- > There has been discussion recently about generating fast rise/fall time pulses by various means. Here is a link to a > Leo Bodnar device that will provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses: > > http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=124&products_id=295 > > This is built on a small PWB with integral BNC connector, powered by 5 vdc through a USB B connector; a trigger output > is provided. Price is US$68. > > I've ordered one of these for testing. > > Is anyone here using one of these? > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

PS

paul swed

Tue, Oct 10, 2017 8:09 PM

I looked at the picture and I can see now that the sma is the pulse and the
BNC is the output trigger. Pretty interesting for the cost.
I then did a search on google for fast pulse generation and a analog
devices solution came up that delivers 50ps and actually shorter. I doubt
its one and the same method. But look forward to other comments.
Regards
Paul
WB8TSL

On Tue, Oct 10, 2017 at 3:42 PM, Brooke Clarke brooke@pacific.net wrote:

Hi Larry:

How does it work.
When I was working with microwave semis it was either a tunnel diode or a
Step Recovery Diode.

--
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

-------- Original Message --------

There has been discussion recently about generating fast rise/fall time
pulses by various means. Here is a link to a Leo Bodnar device that will
provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses:

http://www.leobodnar.com/shop/index.php?main_page=product_in
fo&cPath=124&products_id=295

This is built on a small PWB with integral BNC connector, powered by 5
vdc through a USB B connector; a trigger output is provided. Price is US$68.

I've ordered one of these for testing.

Is anyone here using one of these?

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/m
ailman/listinfo/time-nuts
and follow the instructions there.

I looked at the picture and I can see now that the sma is the pulse and the BNC is the output trigger. Pretty interesting for the cost. I then did a search on google for fast pulse generation and a analog devices solution came up that delivers 50ps and actually shorter. I doubt its one and the same method. But look forward to other comments. Regards Paul WB8TSL On Tue, Oct 10, 2017 at 3:42 PM, Brooke Clarke <brooke@pacific.net> wrote: > Hi Larry: > > How does it work. > When I was working with microwave semis it was either a tunnel diode or a > Step Recovery Diode. > > -- > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > > -------- Original Message -------- > >> There has been discussion recently about generating fast rise/fall time >> pulses by various means. Here is a link to a Leo Bodnar device that will >> provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses: >> >> http://www.leobodnar.com/shop/index.php?main_page=product_in >> fo&cPath=124&products_id=295 >> >> This is built on a small PWB with integral BNC connector, powered by 5 >> vdc through a USB B connector; a trigger output is provided. Price is US$68. >> >> I've ordered one of these for testing. >> >> Is anyone here using one of these? >> >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/listinfo/time-nuts > and follow the instructions there. >

AG

Adrian Godwin

Tue, Oct 10, 2017 8:11 PM

I expected it to be a variant of the Jim Williams avalanche pulse
generator, but one of the photos shows a part marked AJK AAA that appears
to be the active component.

http://www.leobodnar.com/files/40ps-pulser-RevG.jpg

On Tue, Oct 10, 2017 at 8:42 PM, Brooke Clarke brooke@pacific.net wrote:

Hi Larry:

How does it work.
When I was working with microwave semis it was either a tunnel diode or a
Step Recovery Diode.

--
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

-------- Original Message --------

There has been discussion recently about generating fast rise/fall time
pulses by various means. Here is a link to a Leo Bodnar device that will
provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses:

http://www.leobodnar.com/shop/index.php?main_page=product_in
fo&cPath=124&products_id=295

This is built on a small PWB with integral BNC connector, powered by 5
vdc through a USB B connector; a trigger output is provided. Price is US$68.

I've ordered one of these for testing.

Is anyone here using one of these?

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/m
ailman/listinfo/time-nuts
and follow the instructions there.

I expected it to be a variant of the Jim Williams avalanche pulse generator, but one of the photos shows a part marked AJK AAA that appears to be the active component. http://www.leobodnar.com/files/40ps-pulser-RevG.jpg On Tue, Oct 10, 2017 at 8:42 PM, Brooke Clarke <brooke@pacific.net> wrote: > Hi Larry: > > How does it work. > When I was working with microwave semis it was either a tunnel diode or a > Step Recovery Diode. > > -- > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > > -------- Original Message -------- > >> There has been discussion recently about generating fast rise/fall time >> pulses by various means. Here is a link to a Leo Bodnar device that will >> provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses: >> >> http://www.leobodnar.com/shop/index.php?main_page=product_in >> fo&cPath=124&products_id=295 >> >> This is built on a small PWB with integral BNC connector, powered by 5 >> vdc through a USB B connector; a trigger output is provided. Price is US$68. >> >> I've ordered one of these for testing. >> >> Is anyone here using one of these? >> >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/listinfo/time-nuts > and follow the instructions there. >

MD

Magnus Danielson

Tue, Oct 10, 2017 8:14 PM

Hi,

On 10/10/2017 09:42 PM, Brooke Clarke wrote:

Hi Larry:

How does it work.
When I was working with microwave semis it was either a tunnel diode or
a Step Recovery Diode.

Looking at the pictures, it seems like the surface mounted chip marked
AJK AAA is the driver-chip that connects through a capacitor over to the
centerlead of the BNC output.

Some form of driver, and setup such that amplitude scale can be controlled.

Cheers,
Magnus

Hi, On 10/10/2017 09:42 PM, Brooke Clarke wrote: > Hi Larry: > > How does it work. > When I was working with microwave semis it was either a tunnel diode or > a Step Recovery Diode. > Looking at the pictures, it seems like the surface mounted chip marked AJK AAA is the driver-chip that connects through a capacitor over to the centerlead of the BNC output. Some form of driver, and setup such that amplitude scale can be controlled. Cheers, Magnus

BG

Bruce Griffiths

Tue, Oct 10, 2017 8:20 PM

It appears to be merely an ECL comparator;
https://www.eevblog.com/forum/projects/yet-another-fast-edge-pulse-generator/

Bruce

On 11 October 2017 at 09:14 Magnus Danielson magnus@rubidium.dyndns.org wrote:

Hi,

On 10/10/2017 09:42 PM, Brooke Clarke wrote:

Hi Larry:

How does it work.
When I was working with microwave semis it was either a tunnel diode or
a Step Recovery Diode.

Looking at the pictures, it seems like the surface mounted chip marked
AJK AAA is the driver-chip that connects through a capacitor over to the
centerlead of the BNC output.

Some form of driver, and setup such that amplitude scale can be controlled.

Cheers,
Magnus

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

It appears to be merely an ECL comparator; https://www.eevblog.com/forum/projects/yet-another-fast-edge-pulse-generator/ Bruce > On 11 October 2017 at 09:14 Magnus Danielson <magnus@rubidium.dyndns.org> wrote: > > > Hi, > > On 10/10/2017 09:42 PM, Brooke Clarke wrote: > > Hi Larry: > > > > How does it work. > > When I was working with microwave semis it was either a tunnel diode or > > a Step Recovery Diode. > > > > Looking at the pictures, it seems like the surface mounted chip marked > AJK AAA is the driver-chip that connects through a capacitor over to the > centerlead of the BNC output. > > Some form of driver, and setup such that amplitude scale can be controlled. > > Cheers, > Magnus > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

MD

Magnus Danielson

Tue, Oct 10, 2017 8:25 PM

This one, if you read what is written there:

http://www.analog.com/en/products/linear-products/comparators/adcmp572.html#product-overview

Cheers,
Magnus

On 10/10/2017 10:20 PM, Bruce Griffiths wrote:

It appears to be merely an ECL comparator;
https://www.eevblog.com/forum/projects/yet-another-fast-edge-pulse-generator/

Bruce

On 11 October 2017 at 09:14 Magnus Danielson magnus@rubidium.dyndns.org wrote:

Hi,

On 10/10/2017 09:42 PM, Brooke Clarke wrote:

Hi Larry:

How does it work.
When I was working with microwave semis it was either a tunnel diode or
a Step Recovery Diode.

Looking at the pictures, it seems like the surface mounted chip marked
AJK AAA is the driver-chip that connects through a capacitor over to the
centerlead of the BNC output.

Some form of driver, and setup such that amplitude scale can be controlled.

Cheers,
Magnus

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

This one, if you read what is written there: http://www.analog.com/en/products/linear-products/comparators/adcmp572.html#product-overview Cheers, Magnus On 10/10/2017 10:20 PM, Bruce Griffiths wrote: > It appears to be merely an ECL comparator; > https://www.eevblog.com/forum/projects/yet-another-fast-edge-pulse-generator/ > > Bruce >> On 11 October 2017 at 09:14 Magnus Danielson <magnus@rubidium.dyndns.org> wrote: >> >> >> Hi, >> >> On 10/10/2017 09:42 PM, Brooke Clarke wrote: >>> Hi Larry: >>> >>> How does it work. >>> When I was working with microwave semis it was either a tunnel diode or >>> a Step Recovery Diode. >>> >> >> Looking at the pictures, it seems like the surface mounted chip marked >> AJK AAA is the driver-chip that connects through a capacitor over to the >> centerlead of the BNC output. >> >> Some form of driver, and setup such that amplitude scale can be controlled. >> >> Cheers, >> Magnus >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there.

GH

Gerhard Hoffmann

Tue, Oct 10, 2017 9:46 PM

Am 10.10.2017 um 22:25 schrieb Magnus Danielson:

This one, if you read what is written there:

http://www.analog.com/en/products/linear-products/comparators/adcmp572.html#product-overview

I have used a ADCMP580 comparator on a home etched board

with semi rigid for the outputs. This is what I got from it:

<
https://www.flickr.com/photos/137684711@N07/33305853110/in/album-72157662535945536/

I have also experimented with BAT15 Schottky limiters to get less rise
time at the cost of less amplitude.

That has been replaced by a 54754A differential TDR in the mean time :-)

The scope knows its own risetimes and can calculate them away, at least
somewhat.

BNC and 40 ps rise time don't go together well.

Cheers, Gerhard

On 10/10/2017 10:20 PM, Bruce Griffiths wrote:

It appears to be merely an ECL comparator;
https://www.eevblog.com/forum/projects/yet-another-fast-edge-pulse-generator/

Bruce

On 11 October 2017 at 09:14 Magnus Danielson
magnus@rubidium.dyndns.org wrote:

Hi,

On 10/10/2017 09:42 PM, Brooke Clarke wrote:

Hi Larry:

How does it work.
When I was working with microwave semis it was either a tunnel
diode or
a Step Recovery Diode.

Looking at the pictures, it seems like the surface mounted chip marked
AJK AAA is the driver-chip that connects through a capacitor over to
the
centerlead of the BNC output.

Some form of driver, and setup such that amplitude scale can be
controlled.

Cheers,
Magnus

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Am 10.10.2017 um 22:25 schrieb Magnus Danielson: > This one, if you read what is written there: > > http://www.analog.com/en/products/linear-products/comparators/adcmp572.html#product-overview > > I have used a ADCMP580 comparator on a home etched board with semi rigid for the outputs. This is what I got from it: < https://www.flickr.com/photos/137684711@N07/33305853110/in/album-72157662535945536/ > I have also experimented with BAT15 Schottky limiters to get less rise time at the cost of less amplitude. That has been replaced by a 54754A differential TDR in the mean time :-) The scope knows its own risetimes and can calculate them away, at least somewhat. BNC and 40 ps rise time don't go together well. Cheers, Gerhard > > On 10/10/2017 10:20 PM, Bruce Griffiths wrote: >> It appears to be merely an ECL comparator; >> https://www.eevblog.com/forum/projects/yet-another-fast-edge-pulse-generator/ >> >> >> Bruce >>> On 11 October 2017 at 09:14 Magnus Danielson >>> <magnus@rubidium.dyndns.org> wrote: >>> >>> >>> Hi, >>> >>> On 10/10/2017 09:42 PM, Brooke Clarke wrote: >>>> Hi Larry: >>>> >>>> How does it work. >>>> When I was working with microwave semis it was either a tunnel >>>> diode or >>>> a Step Recovery Diode. >>>> >>> >>> Looking at the pictures, it seems like the surface mounted chip marked >>> AJK AAA is the driver-chip that connects through a capacitor over to >>> the >>> centerlead of the BNC output. >>> >>> Some form of driver, and setup such that amplitude scale can be >>> controlled. >>> >>> Cheers, >>> Magnus >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

AE

Andrew E Mileski

Wed, Oct 11, 2017 8:39 AM

From its creator's forum posts, it appears to be a high slew rate

comparator, that once "triggered" will pass the next pulse of an
asynchronous 10 MHz square wave clock (2.5 ppm).

The first version used a micro for setting the threshold voltage. The
micro was removed in the following generation.

It is for generating fast edges for equipment (bandwidth) testing, not for
precision timing.

Feel free to correct me if I'm wrong. I was disappointed with the limited
information I could dig-up.

~~
Andrew E. Mileski

On Oct 10, 2017 4:02 PM, "Brooke Clarke" brooke@pacific.net wrote:

Hi Larry:

How does it work.
When I was working with microwave semis it was either a tunnel diode or a
Step Recovery Diode.

--
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

-------- Original Message --------

There has been discussion recently about generating fast rise/fall time
pulses by various means. Here is a link to a Leo Bodnar device that will
provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses:

http://www.leobodnar.com/shop/index.php?main_page=product_in
fo&cPath=124&products_id=295

This is built on a small PWB with integral BNC connector, powered by 5
vdc through a USB B connector; a trigger output is provided. Price is US$68.

I've ordered one of these for testing.

Is anyone here using one of these?

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/m
ailman/listinfo/time-nuts
and follow the instructions there.

>From its creator's forum posts, it appears to be a high slew rate comparator, that once "triggered" will pass the next pulse of an asynchronous 10 MHz square wave clock (2.5 ppm). The first version used a micro for setting the threshold voltage. The micro was removed in the following generation. It is for generating fast edges for equipment (bandwidth) testing, not for precision timing. Feel free to correct me if I'm wrong. I was disappointed with the limited information I could dig-up. ~~ Andrew E. Mileski On Oct 10, 2017 4:02 PM, "Brooke Clarke" <brooke@pacific.net> wrote: > Hi Larry: > > How does it work. > When I was working with microwave semis it was either a tunnel diode or a > Step Recovery Diode. > > -- > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > > -------- Original Message -------- > >> There has been discussion recently about generating fast rise/fall time >> pulses by various means. Here is a link to a Leo Bodnar device that will >> provide <40 ps rise/fall time, 50% duty cycle, 10 MHz pulses: >> >> http://www.leobodnar.com/shop/index.php?main_page=product_in >> fo&cPath=124&products_id=295 >> >> This is built on a small PWB with integral BNC connector, powered by 5 >> vdc through a USB B connector; a trigger output is provided. Price is US$68. >> >> I've ordered one of these for testing. >> >> Is anyone here using one of these? >> >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/listinfo/time-nuts > and follow the instructions there. >

time-nuts@lists.febo.com

Fast Rise/Fall Time Pulser