| 摘要 |
The invention relates to a noise-measuring device. It comprises a ramp voltage generator (22), a circuit (20) for superimposing a ramp voltage (R) on the noisy signal (S+B), an analogue-to-digital converter (32, 42) for converting successive samples of the sum of the noisy signal (S+B) and the ramp (R) into corresponding numerical values (Mn), and processing circuits (48, 50, 52) for calculating the noise (Bn) corresponding to each numerical value (Mn) from the said numerical value, from the value of the said signal (S) and from the value of the said ramp (R) and from the said value (Mn). <IMAGE>
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