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Bandwidth vs Coupling
Bandwidth vs Coupling
10 7
10 7
Type II (nom. 50 µA/Φ 0 )
50 µV/Φ 0
75
100
150
10 6
Frequency (Hz)
Frequency (Hz)
Type I (nom. 5 µA/Φ 0)
10 5
10 4
10 3
0
5
10
15
20
10 6
10 5
10 4
10 3
25
Sensor Feedback Coupling (µA/Φ 0)
50 µV/Φ 0
75
100
150
0 10 20 30 40 50 60 70 80 90 100
Sensor Feedback Coupling (µA/Φ 0 )
Figure 5.5 The -3dB cut-off frequency as a function of sensor feedback coupling for SQUID
Types I and II and several values of the transfer function ∂V/∂Φ.
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