Request clarification on BJT HFA3134

Started by Anonymous in sci.electronics.design19 hours ago 3 replies

Could some electronics guru here please clarify this ? The datasheet for the NPN BJT HFA3134(from Renessas Semi.) states: The HFA3134 and...

Could some electronics guru here please clarify this ? The datasheet for the NPN BJT HFA3134(from Renessas Semi.) states: The HFA3134 and HFA3135 are Ultra High Frequency Transistor pairs that are fabricated with Intersil Corporation’s complementary bipolar UHF-1X process. The NPN transistors exhibit an fT of 8.5GHz, while the PNP transistors have an fT of 7GHz. Both types e


OT: Rack of Threes

Started by bitrex in sci.electronics.design1 day ago 37 replies

An auto rack of Model 3s, and one random Hyundai Elantra with California plates. Parked about three miles from the dealership driver hit his ELD...

An auto rack of Model 3s, and one random Hyundai Elantra with California plates. Parked about three miles from the dealership driver hit his ELD mandate just short, maybe, that sucks. It looks a lot more appealing from the side with the lighter rims


dac architecture

Started by John Larkin in sci.electronics.design1 day ago 35 replies

We were talking about TCXOs. One measures temperature and drives a varicap through some nonlinear transfer function to get minumum net TC. We...

We were talking about TCXOs. One measures temperature and drives a varicap through some nonlinear transfer function to get minumum net TC. We don't want a digital design (ADC, lookup table or polynomial, DAC) because that might add phase noise. I guess you could use a static polynomial with the equivalent of nonvolatile DPOTS as the coefficients. This occurred to me, not as anything p...


Far out scales, man!

Started by DLUNU in sci.electronics.design1 day ago 6 replies

You were herded to it here first...

You were herded to it here first...


CAD pick and place question

Started by mkr5000 in sci.electronics.design2 days ago 9 replies

If you're on the component side with an IC placed vertically, 0 degrees indicates pin is top left (or at least that's what I've concluded) -- so...

If you're on the component side with an IC placed vertically, 0 degrees indicates pin is top left (or at least that's what I've concluded) -- so if I'm using an 0805 package LED (vertically) on the component side, what would indicate the anode ? The same 0 degrees? Anode at the top? Thanks. (Newbie at P&P data).


Amusing electric car stats

Started by bitrex in sci.electronics.design2 days ago 57 replies

As of December 19th 2018 the four year grand total of Massachusetts state EV purchase/lease rebates is (Dec 2014 - Dec 2018) Tesla:...

As of December 19th 2018 the four year grand total of Massachusetts state EV purchase/lease rebates is (Dec 2014 - Dec 2018) Tesla: 4,257 Chevrolet: 2,807 Toyota: 1,300 Ford: 806 Nissan: 767 BMW: 600 Honda: 559 Smart: 229 Chrysler: 201 Volkswagen: 200 Mitsubishi: 174 Kia: 163 Volvo: 106 Hyundai: 64 Audi: 58 Mercedes: 45 British Motor Co. :35 (?? Jaguar i-Pace?) Zero Motors:...


No Wonder Skeptics Are Confused

Started by Anonymous in sci.electronics.design2 days ago 31 replies

The Physics of Jet Stream Meandering "Advances in Systems Science and Application (2015) Vol.15 No.3 294-302The Physics of Jet Stream...

The Physics of Jet Stream Meandering "Advances in Systems Science and Application (2015) Vol.15 No.3 294-302The Physics of Jet Stream MeanderingWalter E JanachMeggenhornstrasse 20, CH-6045 Meggen, SwitzerlandAbstractLarge-amplitude jet stream meanders involve diabatic processes because conser-vation of angular momentum leads to vortex line stretching and shrinking. Thisrequires late


GLOBAL EXTINCTION WITHIN 18 - 34 MONTHS

Started by Anonymous in sci.electronics.design3 days ago 93 replies

The end is within view, nothing can be done about it, arctic atmospheric methane concentrations are already over 4000 ppb... "We will all be...

The end is within view, nothing can be done about it, arctic atmospheric methane concentrations are already over 4000 ppb... "We will all be boiled alive like lobsters in a massively humid atmosphere and converted into stardust." http://arctic-news.blogspot.com/


Eating As A Source Of Pleasure Soon To Be Abolished

Started by Anonymous in sci.electronics.design3 days ago 39 replies

Get used to more vegetables because that's all you're going to...

Get used to more vegetables because that's all you're going to get. https://phys.org/news/2019-01-human-diet-catastrophic-planet.html Massive amounts of land now used for production of livestock feed will be converted to restorative energy production: http://www.pioneersprouts.com/blog/?fbclid=IwAR3QjrIW1oBu7ApVZPsoBPdL7vFTU8SN-6xx3K6Cp4kAD6RKxmk v3QgL994


Unwanted triggering by mains

Started by Terry Pinnell in sci.electronics.design4 days ago 33 replies

The simple monostable shown in my link suffers from unwanted triggering most times that I switch on or off other lights in my shed...

The simple monostable shown in my link suffers from unwanted triggering most times that I switch on or off other lights in my shed workshop. I'd appreciate tips on what I might try to fix that please. Moving it or the cabling around it is not practical. https://www.dropbox.com/s/1aiwmczfkv8bsry/ShedLampTimerCircuit.jpg?raw=1 Terry, East Grinstead, UK


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