MC3303D 查看數據表（PDF） - STMicroelectronics

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MC3303D

LOW POWER QUAD BIPOLAR OPERATIONAL AMPLIFIERS

STMicroelectronics 

MULTIPLE FEEDBACK BANDPASS FILTER

MC3303 - MC3403 - MC3503

C

R3

VCC

R1

C

eI

R2

1/4

MC3403

eo

CO

C O = 10C

V (ref)

V (ref) =

1

2

VCC

Given fo = center frequency ; chosse values fo, C than

A (fo) = gain at center frequency

R3 = Q

p foC

R1 = R3

2A (fo)

R2 = R1 R5

4Q2 R1-R5

For less than 10% error from operational amplifier

QoFo < 0.1 where fo and BW are expressed in Hz

BW

If source impedance varies, filter may be preceded with voltage

follower buffer to stabilize filter parameters

TYPICAL PERFORMANCE CURVES

7/10

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