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op amps only need picoamps of bias, so use 1M resistors for the divider
author
Bdale Garbee
<bdale@gag.com>
Mon, 24 Feb 2014 01:17:14 +0000
(18:17 -0700)
committer
Bdale Garbee
<bdale@gag.com>
Mon, 24 Feb 2014 01:17:14 +0000
(18:17 -0700)
usbtrng.pcb
patch
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usbtrng.sch
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diff --git
a/usbtrng.pcb
b/usbtrng.pcb
index 556cae96622475cd91af4527bef10594961fea54..b7bc6cd91374a65b25bc3a65fca95860c3454984 100644
(file)
--- a/
usbtrng.pcb
+++ b/
usbtrng.pcb
@@
-1017,14
+1017,14
@@
Element["" "0402" "R71" "150k" 679.26mil 275.00mil 31.50mil 31.50mil 2 100 ""]
)
)
-Element["" "0402" "R75" "1
0k
" 429.00mil 550.00mil -31.50mil 31.50mil 1 100 ""]
+Element["" "0402" "R75" "1
M
" 429.00mil 550.00mil -31.50mil 31.50mil 1 100 ""]
(
Pad[-3.93mil 15.74mil 3.93mil 15.74mil 19.68mil 20.00mil 25.68mil "1" "1" "square"]
Pad[-3.93mil -15.74mil 3.93mil -15.74mil 19.68mil 20.00mil 25.68mil "2" "2" "square"]
)
(
Pad[-3.93mil 15.74mil 3.93mil 15.74mil 19.68mil 20.00mil 25.68mil "1" "1" "square"]
Pad[-3.93mil -15.74mil 3.93mil -15.74mil 19.68mil 20.00mil 25.68mil "2" "2" "square"]
)
-Element["" "0402" "R74" "1
0k
" 429.00mil 488.00mil -31.50mil 31.50mil 1 100 ""]
+Element["" "0402" "R74" "1
M
" 429.00mil 488.00mil -31.50mil 31.50mil 1 100 ""]
(
Pad[-3.93mil 15.74mil 3.93mil 15.74mil 19.68mil 20.00mil 25.68mil "1" "1" "square"]
Pad[-3.93mil -15.74mil 3.93mil -15.74mil 19.68mil 20.00mil 25.68mil "2" "2" "square"]
(
Pad[-3.93mil 15.74mil 3.93mil 15.74mil 19.68mil 20.00mil 25.68mil "1" "1" "square"]
Pad[-3.93mil -15.74mil 3.93mil -15.74mil 19.68mil 20.00mil 25.68mil "2" "2" "square"]
diff --git
a/usbtrng.sch
b/usbtrng.sch
index 129335a4ecf964eafc19389371f3f139d58af9b8..aba94e5cc1d5b98b700d5eea79fdb4f3dbaa3314 100644
(file)
--- a/
usbtrng.sch
+++ b/
usbtrng.sch
@@
-811,9
+811,9
@@
vendor=digikey
T 65400 55200 5 10 1 1 0 0 1
refdes=R74
T 65900 55200 5 10 1 1 0 0 1
T 65400 55200 5 10 1 1 0 0 1
refdes=R74
T 65900 55200 5 10 1 1 0 0 1
-value=1
0k
+value=1
M
T 66300 55600 5 10 0 0 0 0 1
T 66300 55600 5 10 0 0 0 0 1
-vendor_part_number=P1
0.0K
LCT-ND
+vendor_part_number=P1
.00M
LCT-ND
}
C 67400 55600 1 180 0 resistor.sym
{
}
C 67400 55600 1 180 0 resistor.sym
{
@@
-828,9
+828,9
@@
vendor=digikey
T 66500 55200 5 10 1 1 0 0 1
refdes=R75
T 67000 55200 5 10 1 1 0 0 1
T 66500 55200 5 10 1 1 0 0 1
refdes=R75
T 67000 55200 5 10 1 1 0 0 1
-value=1
0k
+value=1
M
T 67400 55600 5 10 0 1 0 0 1
T 67400 55600 5 10 0 1 0 0 1
-vendor_part_number=P1
0.0K
LCT-ND
+vendor_part_number=P1
.00M
LCT-ND
}
N 66300 55500 66500 55500 4
N 66400 55000 66400 55500 4
}
N 66300 55500 66500 55500 4
N 66400 55000 66400 55500 4