MOSFETs are getting better, year by year

Started by Winfield Hill in sci.electronics.design6 days ago 23 replies

MOSFETs are getting better, year by year, see my 25-year Rds * Qgd...

MOSFETs are getting better, year by year, see my 25-year Rds * Qgd scatterplot. https://www.dropbox.com/s/l5f0h1fp7pynwus/MOSFET_scatterplot%2C%20Qgd%20FOM.pdf?dl=0 -- Thanks, - Win


Resistor accuracy

Started by Piotr Wyderski in sci.electronics.design6 days ago 19 replies

I have two HV voltage dividers, each composed of 8x499kOhm+10kOhm resistors. Made of 0.1% resistors, because why not. That should result in...

I have two HV voltage dividers, each composed of 8x499kOhm+10kOhm resistors. Made of 0.1% resistors, because why not. That should result in 4.002MOhm end to end, in the range 3998..4006Ohms. A bit better, if the distributions are assumed to be Gaussian and added properly. But hey, not *that*: https://i.postimg.cc/02xycThn/20190618-071740.jpg Since -- as they say -- there no accidents, ...


SPICE simulations of non-ideal inductor behavior

Started by amal banerjee in sci.electronics.design6 days ago 2 replies

Could some electronics guru here plaease shed some light on this ? I am running SPICE simulations of non-ideal inductors, that include high...

Could some electronics guru here plaease shed some light on this ? I am running SPICE simulations of non-ideal inductors, that include high frequency effects as skin and proximity. I am trying to see the resonance peaks when the non-ideal inductor is placed in parallel with a fixed value capacitor. The AC sweep freqienncy is brtween 100 MHz 10 GHz. As I vary the fixed capacitor value, so...


isolated delta-sigma converters

Started by John Larkin in sci.electronics.design7 days ago 31 replies

https://www.analog.com/en/products/adum7703.html#product-overview and the similar http://www.ti.com/product/AMC1106E05 This is cool. I...

https://www.analog.com/en/products/adum7703.html#product-overview and the similar http://www.ti.com/product/AMC1106E05 This is cool. I can hang a current shunt and a voltage divider on my transformer output, and the isolated delta-sigma data streams can go straight into an FPGA without an ADC. They need DC power on the isolated side, which is a minor nuisance. -- John Lark...


100KHz low pass with constant 50R input impedance

Started by Clifford Heath in sci.electronics.design7 days ago 27 replies

A down-conversion mixer from up to 200MHz down to 50KHz low IF likes to see a solid 50R load, and not see signals reflected from a following...

A down-conversion mixer from up to 200MHz down to 50KHz low IF likes to see a solid 50R load, and not see signals reflected from a following low-IF filter. It should not be necessary to use a really fast op-amp (that can deal with image frequencies) in the LPF, if a passive LPF is used first. So that's what this filter is intended for.


OT: Hillary Clinton talking about defending accused child rapist

Started by John Doe in sci.electronics.design7 days ago

Had heard about it, but always best to hear it from the horse's mouth. https://youtu.be/e2f13f2awK4 Something to note... Just because...

Had heard about it, but always best to hear it from the horse's mouth. https://youtu.be/e2f13f2awK4 Something to note... Just because someone accepts a plea deal does not mean they are guilty. Apparently the prosecution mishandled a piece of critical evidence. Disclaimer: Yes, the rape of a 12-year-old girl is horrible. But so is acting holier-than-thou and blaming it on somebody e...


Differential pair impedance calculations

Started by Fibo in sci.electronics.design7 days ago 1 reply

I'm about to lay out a USB 90 ohm diff pair, and I go to the eeweb impedance online...

I'm about to lay out a USB 90 ohm diff pair, and I go to the eeweb impedance online calculator https://www.eeweb.com/tools/edge-coupled-stripline-impedance I punch in my numbers from the fab house Trace Thickness = 1.4 mil Substrate Height = 14.4 mil Trace Width = 6 mil Trace Spacing = 8 mil Dielectric = 4.5 and I get 89.9 Ohms Then I try to verify against another impedance calc...


half baked idea, frozen can cooler

Started by George Herold in sci.electronics.design1 week ago 31 replies

So I'm imagining filling my empty beer can with water, freezing it. And then clapping it to hot plate of a TEC cooler. ~1 watt max power, but...

So I'm imagining filling my empty beer can with water, freezing it. And then clapping it to hot plate of a TEC cooler. ~1 watt max power, but average power lower than that. My can holds 12 oz, ~340 grams, I get about 333 J/g, https://en.wikipedia.org/wiki/Enthalpy_of_fusion So melting my beer can of ice is about 1 kJ a watt for 1k seconds. I could have more than one frozen can, and r...


Well, it happened--the last fast PNP is EOL

Started by Phil Hobbs in sci.electronics.design1 week ago 67 replies

BFT92, RIP. :( NXP, you lousy bastards, you just took away about a quarter of my design space. Get 'em while they last. Razza frazza...

BFT92, RIP. :( NXP, you lousy bastards, you just took away about a quarter of my design space. Get 'em while they last. Razza frazza mfrgremnmnn.... Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net https://hobbs-e...


OT: USA: Big Supreme Court case about double jeopardy

Started by John Doe in sci.electronics.design1 week ago 20 replies

The oral argument was December 2018, so the decision should be within a month. The question is whether the practice of the federal government,...

The oral argument was December 2018, so the decision should be within a month. The question is whether the practice of the federal government, re-prosecuting people after they have been tried by the state, should continue. The case name is Gamble v. United States. One of the main arguments for allowing re-prosecutions was "a race to the courthouse". If you say only the state or the fed...


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