RHF310AK01V 데이터 시트보기 (PDF) - STMicroelectronics

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RHF310AK01V

Rad-hard 400 µA high-speed operational amplifier

STMicroelectronics 

RHF310A

Active filtering

ωc =

----------1-----------------

R1R2C1C 2

The damping factor is calculated using the following expression.

ζ

=

1

2

ωc (

C1R1

+

C1R2

+

C2R1

–

C1R1g)

The higher the gain, the more sensitive the damping factor. 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:

ζ = -2--C--2--–--C-----1---R--R------f-g--b---------

2 C1C2

Due to a limited selection of capacitor values in comparison with the resistors, you can set C1 = C2 = C, so that:

ζ = -2--R--2--–--R-----1---R--R------f-g--b---------

2 R1R2

DS6201 - Rev 7

page 16/25

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