Electrical characteristics
Figure 27. Circuit for noise rejection improvement measurement
S
R
+5 V
T - bias
Coil
CHF
+
CLF
50 7
TSH345
50 7
AGILENT
4395A
A
TSH345
AM00817
Figure 28 shows how the power supply noise rejection evolves according to the frequency
and depending on how carefully power supply decoupling is achieved.
Figure 28. Power supply noise rejection
0
Vcc=5V(dc)+0.2Vp-p(ac)
-10 Decoupling capacitor: 10µF+100nF
Load=150Ω
-20 Noise rejection=20 log (ΔVCC/ΔVout)
-30
no coil
-40
-50
-60
-70
coil=560µH
-80
10k
100k
1M
10M
Frequency (Hz)
100M
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