0.01% resistors

Jul 30, 2013 68 Replies

--

(c+d)", 0.800

c" 0.800 1.56

0.750 1.67 -1.63
1.88 -1.83 1.83
1.88 -1.83 1.83 3.74
2.03 4.16 11 "a
4.16 17
2.03 4.16 1 "a+b",

"(a+b) + (c+d)",

d))", 0.500

d", 0.400 3.13

0.400 3.13 -3.05
3.75 -3.66 3.66
3.75 -3.66 3.66 7.49 6
4.88 9.98 10 "(a+b)
12.48 16 "(a) +
12.48 18 "a + (b |
12.48

I don't know why, but the table is totally mangled in pan.

?-(

In his OP the column alignment was done with a mixture of spaces and tabs (which are viewer-dependent). Then in your reply it is line wrapped too.

If you can still see the OP you could try turning off line wrapping and fiddling with the tab width.

John Devereux

It is because the tab-char to the number og space-chars is not unique.

Some editor, mail clients, word process. might use e.g. 4space:1tab or

4space:1tab.

It is better that the sender only use space character - combined with a fixed char width font.

/Glenn

It is because the tab-char to the number of space-chars is not unique.

Some editor, mail clients, word process. might use e.g. 4space:1tab or

8space:1tab.

It is better that the sender only use space character - combined with a fixed char width font.

/Glenn

View - Wrap article body - make sure it's OFF.

Displays fine in pan here...

"Design is the reverse of analysis" (R.D. Middlebrook)

Thanks Fred, that untrashed it.

?-)

Just leafing tghrough a Venkel catalog, they have surfmount 0.01%, 5 PPM resistors.

John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation

Without a four point Kelvin connection, there is no way in hell you can get 0.01 percent in-circuit accuracy.

Many thanks, Don Lancaster voice phone: (928)428-4073 Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552 rss: http://www.tinaja.com/whtnu.xml email: don@tinaja.com Please visit my GURU's LAIR web site at http://www.tinaja.com

For a 10K resistor, 0.01 per cent is a full ohm. That's easy on a PC board.

I just designed a laser driver that uses a 2-wire, surface mount, 10 milliohm sense resistor. At 150 amps, I'm seeing less than a 1% error on the measured current.

John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation

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