OT: Why Does Trump Have to Lie?

Started by rickman in sci.electronics.design1 hour ago 35 replies

I heard today that Trump criticized previous Presidents about not contacting families of killed soldiers while Trump does. That is clearly a...

I heard today that Trump criticized previous Presidents about not contacting families of killed soldiers while Trump does. That is clearly a lie. Why does he lie when it is *so* obvious? It makes me wonder about his mental state. Someone who can't stop himself from lying about something so obviously a lie must have something wrong with his brain. Or is this all just "fake news"? Ma...


TIA-PD compensation, by eye

Started by George Herold in sci.electronics.design2 hours ago 33 replies

Hi all, months ago I bought this screaming fet opamp (THS463) to gin up an old photodiode circuit. Put it in today, and the step response doesn't...

Hi all, months ago I bought this screaming fet opamp (THS463) to gin up an old photodiode circuit. Put it in today, and the step response doesn't look right. Here's 1 k ohm of gain w/ 10 pF across it. https://www.dropbox.com/s/ncswyuokm9hktb5/step-10pF.BMP?dl=0 A lot of wiggles, but the amplitude isn't big enough. Here's the uncompensated step. https://www.dropbox.com/s/rilf9gvmlwldaj...


OT: The Slut is Back

Started by Jim Thompson in sci.electronics.design2 hours ago 68 replies

...Jim Thompson -- | James E.Thompson | mens | | Analog...

...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Ava


Signals and Systems for Dummies

Started by John Larkin in sci.electronics.design3 hours ago 9 replies

I have the...

I have the book: https://www.amazon.com/Signals-Systems-Dummies-Mark-Wickert/dp/111847581X/ref=sr_1_1?ie=UTF8&qid =1508604326&sr=8-1&keywords=signals+systems+dummies Here's my DDS sim. A tiny ARM cpu generates a DDS sine wave in software, with a 50 KHz interrupt rate and its internal 10 bit DAC. The spice sim uses a sample+hold and quantizer to simulate that. When V4 is around 400 Hz,


PLL synthesizer chips

Started by Phil Hobbs in sci.electronics.design3 hours ago 47 replies
PLL

Hi all, Since I'm feeling enough better to marshal a few brain cells together, I'm working on my third edition. We've been talking about...

Hi all, Since I'm feeling enough better to marshal a few brain cells together, I'm working on my third edition. We've been talking about PLLs off and on lately, so what are your fave high-performance PLL synthesizer chips, and why? I haven't used one since the MC14152, which I abandoned circa 1982. Thanks Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptic...


Contactors/Relays

Started by David Lesher in sci.electronics.design4 hours ago 38 replies

I have futilely been seeking 100A 3ph NC/Form B relays/contactors. It seems they are all stashed in the "unicorn eggs" box, sigh. So a second...

I have futilely been seeking 100A 3ph NC/Form B relays/contactors. It seems they are all stashed in the "unicorn eggs" box, sigh. So a second design approach involves dual coil relays. The flavor I seek has one larger coil to close the relay, and a second, much lower power holding coil to keep it closed. Of course, I'm not finding them either. The ones I unearth are "close coil, open coil...


New Switching Converter Topology?

Started by Tim Williams in sci.electronics.design6 hours ago 29 replies

Does this... exist? I mean, has it been named, or enumerated...

Does this... exist? I mean, has it been named, or enumerated anywhere? https://www.seventransistorlabs.com/Images/Bidirectional_Buck.png Sort of like a Cuk, but swapping the capacitor and switch. Could be used for low ripple buck (drop D1 and Q2), a kind of extended-winding boost (change D1 to transistor, Q2 to diode, drop Q1 and D2), equalizing source/load (note that switching Q1+Q2...


Obamacare Problem Solved...

Started by Jim Thompson in sci.electronics.design11 hours ago 20 replies

Obamacare Problem Solved... [> :-} ...Jim Thompson -- | James E.Thompson ...

Obamacare Problem Solved... [> :-} ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog |


TSMC 7 nm chips

Started by John Larkin in sci.electronics.design13 hours ago 4 replies

https://www.eetimes.com/document.asp?doc_id=1332482& What's amazing is that someone apparently fabbed $400 million worth of custom chips to...

https://www.eetimes.com/document.asp?doc_id=1332482& What's amazing is that someone apparently fabbed $400 million worth of custom chips to mine bitcoins. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


Tektronix 7633 o'scope

Started by Anonymous in sci.electronics.design14 hours ago 13 replies

I've recently gotten hold of a Tektronix 7633 oscilloscope but can't seem to get a trace or any kind of waveform on the crt. Was wondering if...

I've recently gotten hold of a Tektronix 7633 oscilloscope but can't seem to get a trace or any kind of waveform on the crt. Was wondering if I'm doing something wrong , not doing something right , or is the scope in need of repair? Is the repair complex ( I know my way around a soldering iron ) or should I just sell it for parts. It came with three plug-ins : Dual trace amplifie


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