Măsurări Electrice

Amplificarea AV=4.

Amplificator inversor:

*Amplificator inversor

R1 1 2 15k

R2 2 6 60k

R3 3 0 10k

X1 3 2 4 5 6 uA741

.LIB opamp.lib

VCC 4 0 DC 15V

VEE 0 5 DC 15V

V1 1 0 SIN(0 1 50)

.TRAN 0.2M 100M

.PROBE

.END

Amplificator neinversor:

Aleg si .

*Amplificator neinversor

R1 0 1 50K

R2 1 6 150K

X1 3 1 4 5 6 UA741

.LIB OPAMP.LIB

VCC 4 0 DC 15V

VEE 0 5 DC 15V

V1 3 0 SIN(0 1 50)

.TRAN 0.2m 100m

.PROBE

.END

Repetorul de tensiune:

*Repetorul de tensiune

R1 3 6 50K

R2 1 2 50K

X1 2 3 4 5 6 UA741

VCC 4 0 DC 15V

VEE 0 5 DC 15V

V1 1 0 SIN(0 1 50)

.LIB OPAMP.LIB

.TRAN 0.2M 100M

.PROBE

.END

Tensiunea de intrare:

Tensiunea de iesire:

Amplificator sumator

*Amplificator sumator

R1 1 3 20K

R2 2 3 20K

R3 3 7 80K

R4 4 0 100K

VCC 5 0 DC 15V

VEE 0 6 DC 15V

X1 4 3 5 6 7 UA741

.LIB OPAMP.LIB

V1 1 0 SIN(0 2 50)

V2 2 0 SIN(0 1 50)

.TRAN 0.2m 100m

.PROBE

.END

Amplificator diferential

. Am ales si .

Am ales si .

V

*Amplificator diferential

R1 1 3 50k

R2 3 7 100k

R3 2 4 50k

R4 4 0 100k

X1 4 3 5 6 7 uA741

.LIB opamp.lib

VCC 5 0 DC 15V

VEE 0 6 DC 15V

V1 1 0 SIN(0 4 50)

V2 2 0 SIN(0 2 50)

.TRAN 0.2M 100M

.PROBE

.END