BA14741xx
Application examples
○Voltage follower
Datasheet
VCC
OUT
Vin
VEE
Figure 30. Voltage follower circuit
Voltage gain is 0 dB.
This circuit controls output voltage (OUT) equal input
voltage (Vin), and keeps OUT with stable because of
high input impedance and low output impedance.
OUT is shown next formula.
OUT=Vin
○Inverting amplifier
R1
Vin
R2
VCC
R1//R2
VEE
OUT
For inverting amplifier, Vin is amplified by voltage gain
decided R1 and R2, and phase reversed voltage is
outputted.
OUT is shown next formula.
OUT=-(R2/R1)・Vin
Input impedance is R1.
Figure 31. Inverting amplifier circuit
○Non-inverting amplifier
R1
R2
VCC
Vin
OUT
For non-inverting amplifier, Vin is amplified by voltage
gain decided R1 and R2, and phase is same with Vin.
OUT is shown next formula.
OUT=(1 + R2/R1)・Vin
This circuit realizes high input impedance because
Input impedance is operational amplifier’s input
Impedance.
VEE
Figure 32. Non-inverting amplifier
circuit
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TSZ22111・15・00
15/18
TSZ02201-0RAR1G200060-1-2
9.NOV.2012 Rev.001