[FS] KLIP30 Very Fast Rising edge generator  - Page 1
Forum section: electronics / general

author: RoadRunner
author_rank: Frequent Contributor
timestamp: August 16, 2025, 09:48:59 am
content: Hallo,I have designed this little USB Device that can generator very fast rising edge ( Typically ~ 26-28.4ps ) max 30ps and even faster falling edge ( ~ Typically 21-24ps)Programmable DC Coupled Output with 50mV to 1300mV Signal Amplitude with 50Ω OutputProgrammable output frequency PLL Supports 30Khz to 300MhzTop Quality 27Ghz SMA Output ConnectorCrossplatform GUI Application for Configuration, Supports Windows, Linux, MacOSAvailable onhttps://www.circuitvalley.de/Or you can also just send a PMAny feedback is highly appreciated.

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: August 16, 2025, 11:05:03 am
content: Hi RoadRunner,impressive, nice work.And it seams affordable.Also like your LM399/ADR1399-references.Have a nice day.

author: jonpaul
author_rank: Super Contributor
timestamp: August 16, 2025, 11:27:35 am
content: Very fine, what is cost?Pulse overshoot, abberation?We have used the Leo Bodnar for many years to cal our TEK scopes and Yokogawa time analyzers.LBE-1320A Fast risetime pulse generatorLBE-1320A Fast risetime pulse generatorLBE-1321 Fast Risetime Variable Frequency Pulserhttps://www.leobodnar.com/shop/index.php?main_page=index&cPath=124&zenidAny comparison, spoecs, cost?Have a great day,Jon

author: RoadRunner
author_rank: Frequent Contributor
timestamp: August 16, 2025, 12:03:58 pm
content: Hello Thank you for your feedback cost is primary driven by very expensive SMA connector and other components. 189 EUR Free shipping within DEOver shoot is primarily controlled, can be controlled by the series termination I have tried all the values no resistor from driver up to 100R. Over shoot gets less but rise time also increases to 33ps . At this moment is a balance between rise time and over shoot.I do not have access to Leo's designs, but its basically same Architektur, I have tried few different driver ICs which deliver even faster edge but very low amplitude and extremely expensive .Regards

author: RoadRunner
author_rank: Frequent Contributor
timestamp: August 16, 2025, 12:17:24 pm
content: Just as reference Here is the view on 50Mhz to 8Ghz oscilloscope

author: jonpaul
author_rank: Super Contributor
timestamp: August 16, 2025, 12:35:27 pm
content: Roadrun: Bravo for the fine efffort. Your choice of scopes, connections and terms seen to need review.Chinese scope knockoff are not accurate, especially for transient response.we use calibrated and tracable vintage USA Tektronx, Hewlett Packard and Yokogawa equipent. LeCroy scopes are also excellet.In Germany perhaps you have acess to Rhode and Schwartz equipment?Suggest to get the Leo Bodnar pulse and compare with a NON CCP scope.Amicalment,Jon

author: David Hess
author_rank: Super Contributor
timestamp: August 16, 2025, 12:38:34 pm
content: Quote from: RoadRunner on August 16, 2025, 12:03:58 pmIt is difficult to do better with voltage drive and series termination. Current output (CML) into a parallel termination should be better.I am surprised the lower frequency oscilloscopes have such poor transient response.

author: RoadRunner
author_rank: Frequent Contributor
timestamp: August 16, 2025, 12:47:40 pm
content: The only chinese scope i have it DS1052E, Bought after first video from Dave in around 2011 , I have access to R&S RTB2004 , 300Mhz scope . here is the image from RTB2004

author: jonpaul
author_rank: Super Contributor
timestamp: August 16, 2025, 12:49:24 pm
content: The prev photos had a Rigol and showed lots of overshoot.j

author: David Hess
author_rank: Super Contributor
timestamp: August 16, 2025, 05:15:37 pm
content: Quote from: jonpaul on August 16, 2025, 12:49:24 pmThe Rigol shows something worse than that. The rise and fall time faster than 3.5 nanoseconds indicates slew rate limiting so a full power bandwidth which varies with amplitude, and the step on settling indicates cutoff or saturation and a 4 nanosecond recovery time. Fast rise and fall tests of the DS1000Z series show the same thing if you look carefully. User reports confirm variation in bandwidth with signal level.

author: jonpaul
author_rank: Super Contributor
timestamp: August 16, 2025, 10:24:51 pm
content: David: Indeed, we always test the fast rise pulse response at several levels, with wideband fixed attenuators, eg Mini-Circuits HAT -20, HAT - 10 etc.GEN UT>>ATTN>>SCOPE 50 OhmUnlike the OP do not use cables, we directly attach each part of the chain.Jon