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公开(公告)号：WO2021237288A1
公开(公告)日：2021-12-02
申请号：PCT/AU2021/050503
申请日：2021-05-26
Applicant: SWINBURNE UNIVERSITY OF TECHNOLOGY
Inventor： KRISHNAN, Shanti , DUFFY, Alan , WEBSTER, Craig
IPC: G01R19/04 , H03K5/1532
Abstract: Described herein is a pulse detection circuit (1402, 1500, 1600, 1700) configured to detect peak pulse values from pulses contained in an input analog signal (126). The circuit includes a control circuit (1502) to generate a peak control signal (1504) based on input from a microcontroller (110) and/or a peak detector (108). A peak track/hold circuit (1510) is responsive to the input analog signal (126) and peak control signal (1504) to produce an output peak analog signal (1512). The peak track/hold circuit (1510) includes a peak-detect operational amplifier (1514) having first and second input terminals to receive the input analog signal (126) and peak control signal (1504) respectively, and a peak-hold capacitor (1516) connected to an output terminal of the operational amplifier (1514). The pulse detection circuit (1402, 1500, 1600, 1700) further includes an analog to digital converter (128, 1614) configured to receive the output peak analog signal (1512) and produce a corresponding output peak digital signal. The peak track/hold circuit (1510) is responsive to the peak control signal (1504) to switch between a tracking mode in which the output peak analog signal (1512) is proportional to the input analog signal (126) and a hold mode wherein the output peak analog signal (1512) is held at a constant peak value indicative of a peak pulse value. Upon the arrival of the peak control signal (1504) generated from the control circuit (1502), the peak track/hold circuit (1510) switches from the tracking mode to the hold mode.
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公开(公告)号：WO2021046602A1
公开(公告)日：2021-03-18
申请号：PCT/AU2020/050956
申请日：2020-09-09
Applicant: SWINBURNE UNIVERSITY OF TECHNOLOGY
Inventor： KRISHNAN, Shanti , WEBSTER, Craig , DUFFY, Alan
Abstract: Described herein is a sensor (100) for a coincidence radiation detection device (300). The sensor (100) is formed on a single integrated circuit board (112) and comprises a photomultiplier device (102) powered by an input power signal (114) and configured to receive incident optical pulses of photons (116) from an associated scintillator device (118) and, in response, generate an input electrical signal (120) having corresponding electrical pulses. A charge sensitive amplifier (106) is configured to receive the input electrical signal (120) and output an amplified electrical signal (126) in which the electrical pulses are amplified and stretched in time. An edge-peak detector circuit (108) is configured to detect: (i) a fast rising edge of the electrical pulses; (ii) a beginning of a trailing edge of the electrical pulses; and (iii) a pulse peak value of the electrical pulses. A local microcontroller (110) is provided, which includes: a timing circuit (131) configured to generate timestamp values for each of the detected pulses in response to a detected pulse edge and to synchronise the timestamp values with a reference clock signal (133) to generate timestamp values for the pulses; an analog to digital converter (128) configured to record pulse height values of the electrical pulses; and a communications interface (135) configured to communicate the timestamp values and pulse height values to a memory device.
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公开(公告)号：EP4158362A1
公开(公告)日：2023-04-05
申请号：EP21811842.0
申请日：2021-05-26
Applicant: Swinburne University of Technology
Inventor： KRISHNAN, Shanti , DUFFY, Alan , WEBSTER, Craig
IPC: G01R19/04 , H03K5/1532
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公开(公告)号：EP4028796A1
公开(公告)日：2022-07-20
申请号：EP20862243.1
申请日：2020-09-09
Applicant: Swinburne University of Technology
Inventor： KRISHNAN, Shanti , WEBSTER, Craig , DUFFY, Alan
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