ET01 : Operational Amplifier (Op-Amp) 1

.. Electronics Tutorial Last Updated 4/27/2007

ET01 : Operational Amplifier (Op-Amp) operational amplifier op-amp

1. (Non-inverting amplifier) 2. (Adder) 3. (Inverting amplifier)

1. LM741 1

1 LM741

2. (1K, 5K, 10K) 3. 4

1) (Non-inverting Amplifier)

non-inverting amplifier proportional controller 2 schematic non-inverting amplifier oV iV

21

1o iRV VR

= + (1)

ET01 : Operational Amplifier (Op-Amp) 2

.. Electronics Tutorial Last Updated 4/27/2007

2 Schematic diagram non-inverting amplifier

1 1 kR = 2 5 kR = (1) 6 6o iV V=

schematic 2 LM741 ( op-amp ) 3 4

1 5 LM471 offset

3 non-inverting amplifier

Vi

Vo V -10V

V +10V

GND

ET01 : Operational Amplifier (Op-Amp) 3

.. Electronics Tutorial Last Updated 4/27/2007

4 non-inverting amplifier

1 inverting amplifier

iV (volt) oV (volt) oV ( 6o iV V= ) 0.2 0.936 1.2 0.5 2.602 3.0 1.0 5.862 6.0

2) (Adder) adder

summing junction 2 schematic adder oV 1V 2V

3 31 21 2

oR RV V VR R

= + (2)

inverting amplifier

5 Schematic diagram adder

1 2 3 1 kR R R= = = (2) ( )1 2oV V V= +

ET01 : Operational Amplifier (Op-Amp) 4

.. Electronics Tutorial Last Updated 4/27/2007

adder schematic 5 LM741 6 7

6 adder

7 adder

2 adder

1V (volt) 2V (volt) oV (volt) oV ( ( )1 2oV V V= + ) 1.0 1.0 -1.836 -2.0 1.0 2.0 -2.910 -3.0 3.0 2.0 -4.897 -5.0

Vo

Vi1

V -10V

V +10V

GND

Vi2

ET01 : Operational Amplifier (Op-Amp) 5

.. Electronics Tutorial Last Updated 4/27/2007

3) (Inverting Op-Amp) non-inverting amplifier

8 schematic inverting amplifier oV iV

21

o

i

V RV R

= (3)

8 Schematic diagram inverting amplifier

schematic 8 LM741 9 10

9 inverting amplifier

Vi

Vo

V -10V

V +10V

GND

ET01 : Operational Amplifier (Op-Amp) 6

.. Electronics Tutorial Last Updated 4/27/2007

10 inverting amplifier

1 1 kR = 2 1 kR = (3) -1 o iV V=

3 inverting amplifier

iV (volt) oV (volt) oV ( o iV V= ) 1.0 -0.941 -1.0 2.0 -1.924 -2.0 3.0 -2.924 -3.0