![Page 1: +5 Vrwm.olin.edu/2013/labs/lab5/Lab5.pdf · 2014-01-21 · +5 V 0.1 uF 0.1 uF +2.5 V 100k +2.5 V 0.1 uF +5 V 1M 1k Pulse 1 uF Low Pass Filter From +1/-1 multiplier 100k 499K +2.5](https://reader033.vdocuments.mx/reader033/viewer/2022041820/5e5d2b2937c705420d53f168/html5/thumbnails/1.jpg)
![Page 2: +5 Vrwm.olin.edu/2013/labs/lab5/Lab5.pdf · 2014-01-21 · +5 V 0.1 uF 0.1 uF +2.5 V 100k +2.5 V 0.1 uF +5 V 1M 1k Pulse 1 uF Low Pass Filter From +1/-1 multiplier 100k 499K +2.5](https://reader033.vdocuments.mx/reader033/viewer/2022041820/5e5d2b2937c705420d53f168/html5/thumbnails/2.jpg)
R2
10K
U2A
LMC6484
1
3
2
411
OUT
+
-
V+
V-
R4
499
+5 V
+2.5 V
U2A
LMC6484
1
3
2
411
OUT
+
-
V+
V-
R1
10K
Sq. wave~1 kHz
Red LED
Pulse OX probe
+5 V
LEDLED
IR LED
+2.5 V
C2
0.47uF
R3
1k
![Page 3: +5 Vrwm.olin.edu/2013/labs/lab5/Lab5.pdf · 2014-01-21 · +5 V 0.1 uF 0.1 uF +2.5 V 100k +2.5 V 0.1 uF +5 V 1M 1k Pulse 1 uF Low Pass Filter From +1/-1 multiplier 100k 499K +2.5](https://reader033.vdocuments.mx/reader033/viewer/2022041820/5e5d2b2937c705420d53f168/html5/thumbnails/3.jpg)
U2A
LMC6484
1
3
2
411
OUT
+
-
V+
V-
photodiode
+2.5 V
PD-
R5
1M
+5 V
PD+
Pulse OX probe
Detectorsignal
![Page 4: +5 Vrwm.olin.edu/2013/labs/lab5/Lab5.pdf · 2014-01-21 · +5 V 0.1 uF 0.1 uF +2.5 V 100k +2.5 V 0.1 uF +5 V 1M 1k Pulse 1 uF Low Pass Filter From +1/-1 multiplier 100k 499K +2.5](https://reader033.vdocuments.mx/reader033/viewer/2022041820/5e5d2b2937c705420d53f168/html5/thumbnails/4.jpg)
20K
20k
20K Vout
From photodector
From oscillator
output
Sw A IN
(pin 1)
SigA out
(pin 2)
+5 V
Control A
(pin 13)
CD4066B
+2.5 V
U2A
LMC6484
1
3
2
411
OUT
+
-
V+
V-
![Page 5: +5 Vrwm.olin.edu/2013/labs/lab5/Lab5.pdf · 2014-01-21 · +5 V 0.1 uF 0.1 uF +2.5 V 100k +2.5 V 0.1 uF +5 V 1M 1k Pulse 1 uF Low Pass Filter From +1/-1 multiplier 100k 499K +2.5](https://reader033.vdocuments.mx/reader033/viewer/2022041820/5e5d2b2937c705420d53f168/html5/thumbnails/5.jpg)
+5 V
0.1 uF
0.1 uF
+2.5 V
100k
+2.5 V
0.1 uF
+5 V
1M
1k
Pulse
1 uF
Low Pass Filter
From +1/-1multiplier
100k
499K
+2.5 V
100k
Low Pass Filter& Amplify
U2A
LMC6484
1
3
2
411
OUT
+
-
V+
V-
+5 V
1 uF
Oxygencontent
Long time
constant low
pass filter
100k
U2A
LMC6484
1
3
2
411
OUT
+
-
V+
V-
High PassFilter
U2A
LMC6484
1
3
2
411
OUT
+
-
V+
V-
![Page 6: +5 Vrwm.olin.edu/2013/labs/lab5/Lab5.pdf · 2014-01-21 · +5 V 0.1 uF 0.1 uF +2.5 V 100k +2.5 V 0.1 uF +5 V 1M 1k Pulse 1 uF Low Pass Filter From +1/-1 multiplier 100k 499K +2.5](https://reader033.vdocuments.mx/reader033/viewer/2022041820/5e5d2b2937c705420d53f168/html5/thumbnails/6.jpg)
Figure 7: On the left is the pulse signal. On the right is a test where the subject held their breath after 10 seconds. They held their breath for about 1 minute and then began breathing (heavily).
0 2 4 6 8 10-0.1
-0.05
0
0.05
0.1
0.15
time (s)
V (
puls
e)
0 20 40 60 80 100-0.04
-0.02
0
0.02
0.04
0.06
0.08
time (s)
V (
~oxygen c
onte
nt)