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Table 5 Noise analysis of signal chain blocks

From: A new portable ELF Schumann resonance receiver: design and detailed analysis of the antenna and the analog front-end

Block description

Noise figure (dB) at 10 Hz

Preamplifier

11.76

Low-pass and notch filter

49.02

Double notch filter

45.89

Double low-pass filter

57.18

High-pass filter

36.71

Voltage gain amplifier

27.77 to 104.62