RHF350 STMICROELECTRONICS [STMicroelectronics], RHF350 Datasheet - Page 18

• Manufacturer Part Number: RHF350
• Description: Rad-hard 550 MHz low noise operational amplifier
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Active filtering
18/23
The higher the gain, the more sensitive the damping factor is. When the gain is higher than
1, it is preferable to use very stable resistor and capacitor values. In the case of R1= R2 = R:
Equation 16
Due to a limited selection of capacitor values in comparison with resistor values, we can set
C1= C2 = C, so that:
Equation 17
Doc ID 15604 Rev 4
=
=
2C
-------------------------------- -
2R
-------------------------------- -
2 C
2 R
2
2
–
–
C
R
1
1
C
R
1
1
R
--------
R
--------
R
2
R
2
fb
fb
g
g
RHF350