Hi all,
Brooke Clark wrote:
> In the HP 5100 Frequency Synthesizer they use a heater on the SRD in order to
> increase it's
> lifetime so that the 3 MHz drive will generate the needed harmonics.
> http://www.prc68.com/I/HP5100.shtml These
> assemblies are no longer available and getting an SR
Bill
Now this discussion gets really interesting. You are doing something and
will report results. You have my attention.
Regards
Paul
WB8TSL
On Fri, Apr 15, 2016 at 12:27 PM, BIll Ezell wrote:
> I'm amazed at how much traffic this has generated.
> Thanks Brooke, you're exactly on-topic as usual
I'm amazed at how much traffic this has generated.
Thanks Brooke, you're exactly on-topic as usual.
As I said originally, I wanted a quick-and-dirty-and-cheap, and I'm
using an SMMD-835 SRD. Making up the test layout tonight.
I'm starting with a 100 uA bias on the diode, and a 20 pF diode-to-loa
On Wed, 13 Apr 2016 22:52:28 -0500, you wrote:
>On Wed, April 13, 2016 5:32 pm, David wrote:
>> Step recovery diodes are very similar in construction to varactor
>> diodes so the later can be used in step recovery applications with
>> qualification.
>
>Agilent app note AN1054 discusses using PIN d
Hi:
The idea with a step recovery diode is that during forward bias the diode stores charge. When the polarity reverses the
diode continues to conduct until the charge has been depleted. At that time the diode stops conducting and opens.
Suppose this was done using a square wave. The length of
On 4/13/16 7:50 PM, bownes wrote:
Maybe a krytron? If you are able to get one anyway. ;)
that was my first thought.. or some form of triggered sparkgap
Went and looked up the data sheet for a KN6
Their rise time isn't that fast, what sets them apart from other high
current switching devices
On Wed, April 13, 2016 5:32 pm, David wrote:
> Step recovery diodes are very similar in construction to varactor
> diodes so the later can be used in step recovery applications with
> qualification.
Agilent app note AN1054 discusses using PIN diodes as frequency
multipliers. I believe that the PI
Maybe a krytron? If you are able to get one anyway. ;)
> On Apr 13, 2016, at 18:32, David wrote:
>
>> On Wed, 13 Apr 2016 00:03:03 -0500, you wrote:
>>
>> ...
>>
>> If you are building up something, you probably want a SRD (step
>> recovery diode) or tunnel diode. But both may be hard to find
On 04/14/2016 12:32 AM, David wrote:
On Wed, 13 Apr 2016 00:03:03 -0500, you wrote:
...
If you are building up something, you probably want a SRD (step
recovery diode) or tunnel diode. But both may be hard to find and
expensive these days.
Step recovery diodes are very similar in construct
On Wed, 13 Apr 2016 00:03:03 -0500, you wrote:
>...
>
>If you are building up something, you probably want a SRD (step
>recovery diode) or tunnel diode. But both may be hard to find and
>expensive these days.
Step recovery diodes are very similar in construction to varactor
diodes so the later c
Am 13.04.2016 um 07:03 schrieb Bill Byrom:
I agree with earlier comments that the Analog Devices SiGe voltage
comparators appear to be a good choice, with 37 ps typical rise/fall
(20%/80%):
http://www.analog.com/media/en/technical-documentation/data-sheets/ADCMP580_581_582.pdf
The evaluation boar
The Tektronix 067-0681-01 was widely used in the 1970's and 1980's for
oscilloscope calibration. It produces a <125 ps risetime edge using a
tunnel diode. But it was designed for use with a large driving voltage
slow pulse (60 to 100 V p-p):
http://w140.com/tek_067-0681-01.pdf
http://w140.com/tekwi
Oops, sorry I didn't realize you needed 150 ps rise time. Rob
Sent from my iPad
> On Apr 12, 2016, at 6:02 PM, "jimlux" wrote:
>
>
>
>> On 4/12/16 1:30 PM, BIll Ezell wrote:
>> (cross-posted to volt-nuts)
>> After paying only limited attention to this topic, I suddenly have a
>> need for a pu
I have both HP and Tektronix pulse generators. Neither are expensive and both
have been very reliable. Since I need some really slow rep rates for receiver
testing, I use my Tek 115 triggered with an HP 8904A synthesizer.
Rob, NC0B
Sent from my iPad
> On Apr 12, 2016, at 5:05 PM, "Logan Cum
On Wednesday, April 13, 2016 12:36:54 AM Gerhard Hoffmann wrote:
> Am 12.04.2016 um 22:30 schrieb BIll Ezell:
> > (cross-posted to volt-nuts)
> > After paying only limited attention to this topic, I suddenly have a
> > need for a pulse generator that has <150 ps risetime and a pulse width
> > of at
http://www.its.caltech.edu/~hajimiri/pdf/non-linear.transmission.pdf
The above indicates how cascaded NLTLs using CMOS processes can be used to
construct NLTLs that sharpen both edges of a pulse. 2.5ps fwhm impulses can
also be produced.
Bruce
On Tuesday, April 12, 2016 04:42:06 PM jimlux wrote:
Am 12.04.2016 um 22:30 schrieb BIll Ezell:
(cross-posted to volt-nuts)
After paying only limited attention to this topic, I suddenly have a
need for a pulse generator that has <150 ps risetime and a pulse width
of at least 2 ns. 100mv amplitude or more is fine. I've looked at the
classic Jim W
On 4/12/16 1:30 PM, BIll Ezell wrote:
(cross-posted to volt-nuts)
After paying only limited attention to this topic, I suddenly have a
need for a pulse generator that has <150 ps risetime and a pulse width
of at least 2 ns. 100mv amplitude or more is fine. I've looked at the
classic Jim Williams
Hi Bill,
Lots of resources out there on EEVblog forums and elsewhere. One nice
alternative to the avalanche pulser is a very fast comparator like the
ADCMP580 from Analog Devices. Generate a pulse of whatever width you want
with slower gear, and have the comparator sharpen the edges.
See here
Hi Bill
check out the classical fast rise time pulse generator the mercury
whetted relay, with a good lay-out you could get easily 50psec rise
time, but rather use an SMA than BNC.
You could look for an old Tektronix pulse generator used that principle
73
KJ6UHN
Alex
On 4/12/2016 1:30 PM, BIll
Bill, Avalanche pulse gens only require high voltage because of the high
VBRcbo and the gain of normal NPN transistors. I cant find the reference now
it might have been a 1970s Ham Radio but if you use the same circuit as Jim
but put an NPN "upside down" that is emitter where the collector is in
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