LS204 STMicroelectronics, LS204 Datasheet - Page 9

• Manufacturer Part Number: LS204
• Description: Low-noise bipolar op-amps
• Manufacturer: STMicroelectronics

LS204
Figure 13. Filter configuration
Three parameters are needed to characterize the frequency and phase response of a 2nd
order active filter:
●
●
●
The higher order response is obtained with a series of 2nd order sections. A simple RC
section is introduced when an odd filter is required.
The choice of
Table 6.
Filter response
Bessel
Butterworth
Chebyschev
Vin
the gain (Gv),
the damping factor ( ) or the Q factor (Q = 2 )1),
the cut-off frequency (Fc).
Filter response to
(or Q factor) determines the filter response (see
R1
------ -
------ -
------ -
2
2
2
3
2
2
------ -
------ -
------ -
Q
3
2
2
1
1
1
Frequency at which phase shift is -90°C
Frequency at which Gv = -3 dB
Frequency at which the amplitude response passes through
specified max. ripple band and enters the stop bank.
R2
or Q factor
Application information for active low-pass filters
C1
Cut-off frequency (Fc)
C2
Table
6).
Vout
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