Penguat Instrumentasi

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Penguat Instrumentasi

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Operational Amplifier (Op-Amp)

Sifat Op-Amp Ideal

Resistansi input ( Rin=)

Resistansi output 0 (Rout=0)

Penguatan tegangan loop terbuka ( A=)

Bandwidth ( f= )

Tegangan offset 0

Jika V-= V+maka Vout= 0

Vin= V+- V-

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Inverting Amplifier

VinVout

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Inverting Amplifier

=

+ =

=

= 0

=0

=

=

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Summing Amplifier

V-

=

+

+ 3

=

+

+

3

3

0

=

0

+

0

+

3 0

3

=

+

+

33

Vout

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Non-inverting Amplifier

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Non-inverting Amplifier

= 0

+ =

0

=

=

=

= 1 +

=

=

IF

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Differential Amplifier

3=

+ 3

=3

+ 3 +

0

4=

0

+ 4

=4

+ 4

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Differential Amplifier

=

3

+ 3 + =

4

+ 4

3

+ 3+

+ 3 =

4

+ 4

= 3

+ (

+ 3

)(

4

+ 4)

Jika = dan 3 = 4

=3

=

3

One stage

instrumentation

amplifier

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Instrumentation Amplifier

Va

Vb

RG

R1

R2

R3

R4

R5

R6

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Instrumentation Amplifier

+ + =

=+ +

Jika R1= R2

=2

+ 1

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Instrumentation Amplifier

4+ 6=

6

=6

4+ 6

3+ 5=

5

5

3+ 5+

3

3+ 5 =

6

4+ 6

5

3 (

3+ 5

3 )(

6

4+ 6) =

Jika R3= R4 dan R5= R6

=5

3

( )

=5

3

2

+ 1

=5

3

2

+ 1

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Instrumentation Amplifier

Va

Vb

R1

mR1

nR1

R/a

R/a

R

R

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