T&L Publications

cato said, >If the 3 volt regulator is powered directly from >a transformer secondary circuit,inparallel with >the 5 volt regulator, those switching currents >will be supplied by a lower impedance source and >cause fluctuations only on the input side of the >5 volt regulator, where they are less >si...

Better than having all of the regulators operating off of the 5 V supply.

I'm building a board that has a 5 VDC input. I need 3.3, 2.5, and 1.2 and am thinking of using linear regulators. Last night it occured to me that it might be advantageous to cascade the voltages down from 5 to 3.3 then from 3.3 to 2.5 etc. The kicker is that I think this is a better way to do it, b...

Fantastic site, I've been browsing it for a while and I find it to be readable, interesting, and informative. I learned things I forgot I knew and saw a couple of things put differently than I was taught that helped me understand cool stuff. We should start refering some people to these pages, inclu...

Thanks for the spanking dribach. I thought the heart of the question was about energy transfer. I think your description was interesting, although you are assuming that there is a down or gravity to hover in. If the energy source were great enough, and the mass large enough, and the gravity source w...

I think what cato says has the essence of the best answer. The frozen H2O does not have to hit air that is above 0C to melt. When the meteors hit the atmosphere miles above the surface, I'm pretty sure that the ambient temp. is below 0C. Don't forget that melting and boiling temps are dependent on a...

"blanking" means I forgot the Phillip's part numbers, but now I remember TZA3017 and TZA3012.

I'm not thinking too much about layout, yet. I think the traces will be close to about 1". I'm going to try to keep my board size to 4"x4" and I have 2 Optical trancievers 2 100 pin quads Phillips (Blanking on PNs) Mux and Demux SerDes devices and it looks like 2 AMCC S2018 crosspoint...

The traces are treated as transmission lines even though the traces are short. They are differentially coupled (100 ohms P to N) and each trace is 50 ohms to ground. My setup and hold are ideally about 800 picoseconds and one inch is about 180 ps so your concern is well founded. All traces are lengt...

Belay my last. Nevermind. I got it.

I'm looking for # 104 and 105 size drill bits any leads. Google isn't helping me.
-Rick

Does anyone know the operatinge frequency of of this FET Bus Exchange Switch. I'm thinking of using it, but need it to work at 669 MHz or prefferably 705 MHz. Am I just missing it on the data sheet? device data sheet I looked at TI's so called customer support and filled out a form that they promise...

Awesome links Chris. Thanks.
-Rick

Bodgy is correct. that chip could be anything. The COB packaging is the cheapest available for ICs. Most of us like to see the chip information printed on the devices we use, but that's a whole layer of expense for the chip manufacturer and the suits in charge of those operations have no trouble pas...

Russ is correct, I should have thought of that and the same supply is fine, but you must change the topology of the circuit. The pnp's emitters go to 9V and the collectors go to the current control resistor and the resistor under test.
-Rick