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TS421 数据表(PDF) 29 Page - STMicroelectronics

部件名 TS421
功能描述  360mW MONO AMPLIFIER WITH STANDBY MODE
PDF  32 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TS421 数据表(HTML) 29 Page - STMicroelectronics

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TS419-TS421
29/32
Fig. 98 : Differential Input Amplifier
Configuration
Input capacitance C can be calculated by the
following formula using the -3dB lower frequency
required. (FL is the lower frequency required)
Note : This formula is true only if:
is ten times lower than FL.
The following bill of material is an example of a
differential amplifier with a gain of 2 and a -3dB
lower cuttoff frequency of about 80Hz.
Components :
)
(
2
1
1
F
F
R
C
L
π
≈
Designator
Part Type
R1
20k / 1%
R2
20k / 1%
C
100nF
CB=CS
1µF
U1
TS419/21
)
Hz
(
C
942000
1
F
B
CB
×
=



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