ASYNCHRONOUS DIGITISATION OF TRANSIENT SIGNALS FROM RADIATION DETECTORS
First Claim
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1. A device for digitising a detection signal from an ionising electromagnetic radiation detector comprising:
- a comparator for receiving, on a first of the inputs thereof, a first detection signal from said detector in the form of at least one pulse, and delivering, based on a comparison with a second signal applied to a second of the inputs thereof, a two-state output signal,a control device acting as a feedback loop controlling said second signal based on the output signal of said comparator, such that the direction of variation of said second signal is dependent on the state of said output signal of said comparator, the control device comprising a smoothing filter having given parameters,an estimation device for estimating the second signal using switching times of said output signal of the comparator and said given parameters of said smoothing filter.
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Abstract
A device for sampling or digitising a detection signal from an X- or gamma-ray detector wherein, during a sampling time, estimations of a feedback signal are made at times when the signal injected to the inverting input of a comparator is equal to the detection signal at the non-inverting input of said comparator.
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13 Claims
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1. A device for digitising a detection signal from an ionising electromagnetic radiation detector comprising:
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a comparator for receiving, on a first of the inputs thereof, a first detection signal from said detector in the form of at least one pulse, and delivering, based on a comparison with a second signal applied to a second of the inputs thereof, a two-state output signal, a control device acting as a feedback loop controlling said second signal based on the output signal of said comparator, such that the direction of variation of said second signal is dependent on the state of said output signal of said comparator, the control device comprising a smoothing filter having given parameters, an estimation device for estimating the second signal using switching times of said output signal of the comparator and said given parameters of said smoothing filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for digitising a detection signal from an ionising electromagnetic radiation detector, comprising steps of:
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comparing a first detection signal from said detector in the form of at least one pulse and a second signal, and delivering, based on this comparison, a two-state output signal, controlling said second signal based on said output signal of said comparator, such that the direction of variation of said second signal is dependent on the state of said output signal of said comparator, estimating said second signal using switching times of said comparator output signal and smoothing filter parameters. - View Dependent Claims (13)
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Specification