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TSH346 数据表(PDF) 9 Page - STMicroelectronics

部件名 TSH346
功能描述  Triple video buffer/filter for HD video applications
PDF  18 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TSH346 数据表(HTML) 9 Page - STMicroelectronics

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TSH346
Power supply considerations and improvement of the PSRR
9/18
Figure 22.
Circuit for noise rejection improvement measurement
Figure 23 shows how the power supply noise rejection evolves versus frequency depending
on how carefully the power supply decoupling is achieved.
Figure 23.
Power supply noise rejection
50
+5 V
50
TSH346
AGILENT
4395A
S
R
A
Coil
T- bias
+
AM00825
C
LF
C
HF
10k
100k
1M
10M
100M
-80
-70
-60
-50
-40
-30
-20
-10
0
coil=560µH
no coil
Vcc=5V(dc)+0.2Vp-p(ac)
Decoupling capacitor: 10µF+100nF
Load=150
Ω
Noise rejection=20 log (
ΔVCC/ΔVout)
Frequency (Hz)



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