LF147DT 查看數據表（PDF） - STMicroelectronics

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LF147DT

WIDE BANDWIDTH QUAD J-FET OPERATIONAL AMPLIFIERS

STMicroelectronics 

LF147 - LF247 - LF347

TYPICAL APPLICATIONS (continued)

POSITIVE FEEDBACK BANDPASS FILTER

Input

16k W

220pF

43k W

43k W

-

220pF 4/1

LF347

43k W

1.5k W

30k W

-

4/1

LF347

16k W

220pF

43k W

43k W

-

4/1

220pF

43k W

LF347

1.5k W

Output A

30k W

-

4/1

LF347

Output B

Ground

OUTPUT A

OUTPUT B

SECOND ORDER BANDPASS FILTER

fo = 100kHz; Q = 30; Gain = 16

CASCADED BANDPASS FILTER

fo = 100kHz; Q = 69; Gain = 16

8/10

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