Analog dynamic range, accuracy and number of bits

They say lots of weird things. I blame Lucas for the poor lighting and all that warm beer they drink. It really messes with their minds! ;-)

U and V both are and u and v for that matter after that you end up with subscripts - though I have seen S,s & T,t used in hand based analysis.

No, but we still talk of HT and EHT even today.

Lucas, Prince of Darkness ?:-) ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

Seen on a T shirt:

E/C^2 -1^-2 PV/nR

JT should know this one.

M 1 T?

Rick

Except tommorow, when he's the 'Prince of Dorkieness'.

Just design the amplifiers to have 0.2 degrees relative phase shift. If that's right to 10%, it's plenty good enough.

Incwww.highlandtechnology.com  jlarkin at highlandtechnology dot com

A 100 amp class meter might be designed to clip at 200 amps peak or so. The occasional monster current spike, like a short or a nasty motor start, will have so little total energy that it won't matter.

You fail (no surprises).

I think it should be E/C^2 (-1)^1/2 PV/nR

For mjT, of course, or miT if you're not an EE.

Perhaps it was actually (-1)**(1/2), rather than (-1)**(-2) ?

Which for engineers is of course mjT. ;)

Cheers

Phil Hobbs

Naaaah! The math classes used "i". I was already out of MIT before I encountered the use of "j" ...Jim Thompson

I use "i" for physics problems, where the forward Fourier transform in time is +i*2*pi*f*t, and "j" for EE, where the forward transform is

-j*2*pi*f*t, because it reminds me what the sign convention is.

Physicists care about spatial transforms more than EEs do, and a positive-going plane wave is exp(+-i*(k*x- omega*t)), so you can't have both frequencies positive and deal with positive-going waves--you have to pick your favourite two out of three.

Cheers

Phil Hobbs

cultural

I use "j" exclusively now for complex expressions, and have no trouble with +/- for direction of the wave >:-} ...Jim Thompson

cultural

I doubt you have to worry much about wave propagation on-chip. ;)

Cheers

Phil Hobbs

message

cultural

Getting close to that... latest stuff is 40nm feature size. ...Jim Thompson

message

cultural

Nah, you're all RC transmission lines, and the clock frequencies stopped increasing years ago.

An interesting bit of work just came in--building SPICE models of an ion-trap mass spectrometer. The current product works OK, but apparently was designed by a chemist, so there are a few production problems and lots of mysteries.

Cheers

Phil Hobbs

Not always. You can dig a trench in a lots-of-metal-layers process, line it with vias and get a not-quite-as-horrible transmission liney sort of thing, or pattern a spiral on top to make a crappy inductor. Typical Q is a max of 10 at a few gigs, but it's an inductor alright.

IIRC, picosecond stuff (pulse gens, samplers) are built on monolithic InP using schottky loaded transmission lines. I guess the Q of the stuff is pretty good to do that. "Dielectric loss" of silicon shottkies can be nasty in certain applications.

Hmm, that is interesting.

Tim