M-system 20VS8-202N Instruction Manual - page 3
20VS8-202N
P. 3 / 4
EM-4444
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
Foraninvertingamplification,theout-
put is following.
V
O
= -(R
1
/ R
2
) × V
IN
When R
1
=20kΩ,R
2
=10kΩ,thenthe
outputisfollowing.Thegainis-2.
V
O
=-(20kΩ/10kΩ)× V
IN
=-2× V
IN
+
–
38
3
–
+
+
–
36
37
19
18
+
–
20
22
+
R
2
R
1
–
2
1
15V DC
POWER
■
Inverting amplifier circuit: Example of G = -R
1
/ R
2
(output is inverted from the input)
Inverting amplifier circuit G = -R
1
/ R
2
OUTPUT V
O
INPUT V
IN
REF. Volt. SOURCE for INPUT
Foranon-invertingamplificationwith
externaladjustments,whenthecom-
bined resistance of the span adjust-
ment and 9 kΩ is 10 kΩ, the gain is
(1+10kΩ/R
2
) × V
IN
. With the span
adjustment(2kΩ),theoutputiscon-
figurable.Thezeroisadjustablewith
a reference voltage source of ±16.5 V
DC and the attenuation of 200Ω and
30kΩ.
For an inverting amplification with
externaladjustments,whenthecom-
bined resistance of the span adjust-
ment and 9 kΩ is 10 kΩ, the gain is
-(10kΩ/R
2
) × V
IN
. With the span ad-
justment(2kΩ),theoutputisconfig-
urable.Thezeroisadjustablewitha
reference voltage source of ±16.5 V DC
andtheattenuationof200Ωand30
kΩ.
9kΩ
10kΩ
50kΩ
(ZERO)
2kΩ
(SPAN)
10kΩ
30kΩ
200Ω
38
3
36
37
18
20
22
1
2
■
Non-inverting amplifier circuit with external adjustments: Example of G = 2
+
–
–
+
+
–
Non-inverting amplifier circuit zero/span adjustments
INPUT V
IN
REF. Volt.
SOURCE
for INPUT
19
15V DC
POWER
OUTPUT Vo
+
–
+
–
9kΩ
10kΩ
100kΩ
(ZERO)
2kΩ
(SPAN)
10kΩ
30kΩ
200Ω
19
18
20
22
15V DC
POWER
38
3
36
37
2
1
■
Inverting amplifier circuit with external adjustments: Example of G = -1 (output is inverted from the input)
+
+
–
–
+
+
–
Inverting amplifier circuit zero/span adjustments
–
OUTPUT V
O
INPUT V
IN
REF. Volt.
SOURCE
for INPUT
+
–
38
3
36
37
2
1
19
18
20
22
15V DC
POWER
+
–
INPUT V
IN
+
–
+Vos
–Vos
–
+
–
+
■
Non-inverting amplifier circuit: With noise filter
REF. Volt. SOURCE
for INPUT
+
–
Circuit with low-pass filter installed
on the output.