M-system 20VS8-202N, Instruction Manual

Page: 3 / 4

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
For an inverting amplification, the out -
put is following.
V
O
= -(R
1
/ R
2
)
×
V
IN
When R
1
= 20 kΩ, R
2
= 10 kΩ, then the
output is following. The gain is -2.
V
O
= -(20 kΩ / 10 kΩ) × 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
For a non-inverting amplification with
external adjustments, when the com
-
bined resistance of the span adjust -
ment and 9 kΩ is 10 kΩ, the gain is
(1 + 10 kΩ / R
2
) × V
IN
. With the span
adjustment (2 kΩ), the output is con -
figurable. The zero is adjustable with
a reference voltage source of ±16.5 V
DC
and the attenuation of 200Ω and
30kΩ.
For an inverting amplification with
external adjustments, when the com
-
bined resistance of the span adjust -
ment and 9 kΩ is 10 kΩ, the gain is
-(10 kΩ / R
2
) × V
IN
. With the span ad-
justment (2 kΩ), the output is config -
urable. The zero is adjustable with a
reference voltage source of ±16.5 V DC
and the attenuation of 200 Ω and 30
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.