Current preamplifier, time-resolved readout circuit and time-resolved detection device
A preamplifier and current amplification technology, applied in the field of nuclear detection technology and nuclear electronics, can solve the problems of large readout noise of current preamplifier, large readout noise of preamplifier, and inability to discriminate small signals, and achieve low Equivalent input impedance, eliminate DC offset, ensure accurate screening effect
Active Publication Date: 2019-03-12
INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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like figure 1 It can be seen that the chip uses a high-speed current preamplifier to collect the photocurrent signal output by the sensor. However, the readout noise of the current preamplifier is large, and it cannot discriminate small signals.
The chip requires an input signal greater than 100fC, and in NRS experiments (usually using APD detectors), to 57 Take Fe nuclear resonance scattering as an example, the X-ray energy is 14.4keV, the magnification of the APD sensor is M=50, and the nuclear scattering signal generated is about 32fC. Therefore, the NINO chip cannot meet the experimental requirements
This limits the application of NINO chips in experiments with low noise requirements
[0004] Therefore, it is necessary to solve the problem that the readout noise of the current preamplifier is large and the small signal cannot be discriminated
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[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details being omitted, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solution...
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The invention relates to a current pre-amplifier, a time resolution reading circuit and a time resolution detection device. The current pre-amplifier comprises a current input module, a current amplifying module, a current-to-voltage module and an alternating current coupling output module, wherein the current input module is used for receiving a current signal; the current amplifying module is used for receiving the current signal from the current input module and amplifying the current signal; the current-to-voltage module is used for receiving the current signal amplified by the current amplifying module and converting the amplified current signal into a voltage signal; and the alternating current coupling output module is used for eliminating the direct-current component of the voltage signal. The current pre-amplifier configured in the invention is easy to realize, and has the characteristics of low equivalent input impedance, low noise and the like, so that small input signals can be distinguished.
Description
technical field [0001] The disclosure relates to the fields of nuclear detection technology and nuclear electronics, in particular, to a current preamplifier, a time-resolved readout circuit and a time-resolved detection device. Background technique [0002] At present, in nuclear detection technology, time-resolved detection devices are widely used in particle time-of-flight (TOF) measurements, nuclear isotope resonant inelastic scattering (NRS) experiments, X-ray non-resonant inelastic scattering (IXS) experiments and other fields. The time-resolved detection means may include a time-resolved readout circuit and a high-speed sensor, which may be, for example, an avalanche photodiode (APD) sensor, a multi-gap resistive plate cell (MRPC) detector. [0003] The representative of the existing time-resolved readout circuit is NINO (NINO: An Ultrafast Low-Power Front-End Amplifier Discriminator for the Time-of-Flight Detector in the ALICE Experiment) developed by CERN, the Europ...
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IPC IPC(8): H03F1/26H03F1/30H03F1/56H03F3/34
CPCH03F1/26H03F1/30H03F1/56H03F3/34
Inventor 周杨帆李贞杰李秋菊刘鹏
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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