Current-added multi-input transconductance capacitive pulse shaper circuit and current-added multi-input transconductance capacitive pulse shaper device

Abstract

The invention provides a current-added multi-input transconductance capacitive pulse shaper circuit and device, and belongs to the technical field of circuit design, and the method comprises a plurality of first transconductance used for converting an input voltage signal into a current signal; the current adding node is connected with the output ends of the plurality of first transconductance and is configured to superpose the current signals output by the plurality of first transconductance to form a total current signal; and the conversion unit is connected with the current adding node and is configured to convert the total current signal into a pulse voltage signal to be output. According to the current-added multi-input transconductance capacitive pulse shaper circuit and the current-added multi-input transconductance capacitive pulse shaper device provided by the invention, the layout area is effectively saved, so that a plurality of channels or pixels share one pulse shaper circuit, a larger area is reserved for a comparator, and the offset voltage of the comparator is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit design, and particularly relates to a multi-input transconductance-capacitor type pulse shaper circuit and device for current addition. Background Art

[0002] In a radiation detector readout circuit chip, a pulse shaper is required to filter and shape the output of a charge-sensitive amplifier and then cascade with a comparator for threshold crossing triggering. However, in a multi-channel or pixel-type radiation detector readout circuit chip, due to the large number of channels or pixels, the limited area of a single channel or pixel, the offset voltage of the comparator will seriously affect the detection accuracy. Therefore, reducing the offset voltage of the comparator is an urgent problem to be solved. Summary of the Invention

[0003] In view of the above problems, embodiments of the present application provide a multi-input transconductance-capacitor type pulse shaper circuit and device for current addition to overcome or at least partially solve the above problems.

[0004] In a first aspect of the embodiments of the present application, a multi-input transconductance-capacitor type pulse shaper circuit for current addition is provided, including: A plurality of first transconductances, where the first transconductances are configured to convert an input voltage signal into a current signal; A current addition node connected to the output ends of the plurality of first transconductances, configured to superimpose the current signals output by the plurality of first transconductances to form a total current signal; A conversion unit connected to the current addition node, configured to convert the total current signal into a pulse voltage signal and output it.

[0005] Further, it further includes: A second transconductance, where the positive input end of the second transconductance is connected to the output end of the conversion unit, the negative input end of the second transconductance is connected to a voltage source, and the output end of the second transconductance is connected to the negative output end of the first transconductance, configured to convert the pulse voltage signal into a feedback voltage signal and output it to the negative input end of the first transconductance.

[0006] Further, it further includes: a first capacitor, where the first end of the first capacitor is connected to the output end of the second transconductance, and the second end of the first capacitor is grounded, configured to filter the feedback voltage signal.

[0007] Further, the conversion unit includes: a third transconductance; wherein, the output end of the third transconductance is respectively connected to the current summing node, the positive input end of the second transconductance and the negative input end of the third transconductance, and the first input end of the third transconductance is connected to the voltage source, and is configured to convert the total current signal into the pulse voltage signal.

[0008] Further, the conversion unit further includes: a second capacitor; wherein, the first end of the second capacitor is connected to the output end of the third transconductance, and the second end is grounded, and is configured to filter the pulse voltage signal.

[0009] Further, the parameters of the first transconductance, the second transconductance, the third transconductance, the first capacitor and the second capacitor are adjustable to adapt to the voltage signals of different frequencies and amplitudes.

[0010] Further, the current summing node is a low-resistance node, and is configured to ensure stable summation of the current signals output by the plurality of first transconductances.

[0011] In the second aspect of the embodiments of the present application, a multi-input transconductance-capacitor type pulse shaper device is provided, including a comparator and the multi-input transconductance-capacitor type pulse shaper circuit described in the first aspect of the embodiments of the present application; The comparator is connected to the output end of the conversion unit, and is configured to compare the pulse voltage signal with a preset threshold to determine whether the pulse voltage signal meets the trigger condition; wherein, the trigger condition is used to represent that the comparator outputs a start signal outward.

[0012] Further, it further includes: a plurality of charge sensitive amplifiers and a plurality of radiation detectors; wherein, one charge sensitive amplifier is respectively connected to one radiation detector and one first transconductance; wherein, the charge sensitive amplifier is configured to convert the radiation signal output by the radiation detector into the voltage signal and output it to the first transconductance.

[0013] Further, the radiation detector is a pixel type radiation detector or a multi-channel type radiation detector.

[0014] A current summing multi-input transconductance-capacitor type pulse shaper circuit according to an embodiment of the present application includes: a plurality of first transconductances, wherein the first transconductance is used to convert the input voltage signal into a current signal; a current summing node, connected to the output ends of the plurality of first transconductances, and configured to superimpose the current signals output by the plurality of first transconductances to form a total current signal; a conversion unit, connected to the current summing node, and configured to convert the total current signal into a pulse voltage signal and output it.

[0015] Therefore, by setting multiple first transconductances to convert multiple input voltage signals into current signals, using a current summing node to superimpose these current signals to form a total current signal, and then converting it into a pulse voltage signal through a conversion unit for output, effective integration and shaping processing of multiple input voltage signals can be achieved. In a multi-channel or pixel-type radiation detector readout circuit, it is possible to effectively save the layout area, enabling multiple channels or pixels to share a single pulse shaper circuit, leaving a larger area for the comparator, reducing the offset voltage of the comparator, while improving the signal-to-noise ratio of the overall signal path, enhancing the detection accuracy, and solving problems such as large comparator offset voltage, reduced detection accuracy, and low readout rate caused by a large number of channels and limited single-channel area. Brief Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic block diagram of a current-summing multi-input transconductance-capacitor type pulse shaper circuit provided by an embodiment of the present application; Figure 2 is a schematic structural diagram of a current-summing multi-input transconductance-capacitor type pulse shaper circuit provided by an embodiment of the present application; Figure 3 is a schematic block diagram of a current-summing multi-input transconductance-capacitor type pulse shaper device provided by an embodiment of the present application; Reference Numerals: G m1-1 、G m1-2 - First transconductance; G m2－ Second transconductance; g ms - Third transconductance; C1 - First capacitor, C2 - Second capacitor; VIN - Input voltage signal; VOUT - Output pulse voltage signal; Vref - Voltage source. Detailed Embodiments

[0018] The exemplary embodiments of the present application will be described in more detail below in conjunction with the drawings in the embodiments of the present application. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0019] Radiation detector readout circuit chips often need to measure the dose of the radiation signal detected by the detector. The widely used method is to determine the energy range where the incident signal is located and perform counting. The radiation detector converts the incident radiation signal into a weak current pulse signal. The radiation detector readout circuit first uses a charge-sensitive amplifier to convert and amplify the current pulse signal into a voltage signal, and then uses a pulse shaper to filter, shape, and further amplify the output waveform of the charge-sensitive amplifier to obtain a pulse voltage signal proportional to the energy. Then, the output of the pulse shaper is compared with a fixed threshold by a comparator, and the energy interval where the incident signal is located can be judged, achieving the function of detecting the energy range of the signal.

[0020] In a pixel-type radiation detector readout circuit or a multi-channel radiation detector readout circuit, the number of pixels (channels) is very large, and a large amount of data needs to be processed. At the same time, the area of the pixels (channels) is limited. If a signal processing scheme of a charge-sensitive amplifier, a pulse shaper, and a comparator is adopted in each pixel (channel), it will lead to a serious limitation of the layout area of the comparator, an increase in the offset voltage of the comparator, a decrease in the comparison accuracy, and a decrease in the detection accuracy of the entire system. At the same time, due to the large number of pixels (channels), a large amount of data needs to be processed, reducing the readout rate of the entire readout chip.

[0021] Therefore, to solve the above problems, this embodiment provides a current-summing multi-input transconductance-capacitor type pulse shaper circuit, so that multiple channels or multiple pixels share a pulse shaper circuit, realizing the summation of the detected charge amounts, saving the layout area, leaving a larger area for the comparator, reducing the offset voltage of the comparator, and at the same time improving the signal-to-noise ratio of the overall signal path and the detection accuracy to solve the above problems.

[0022] Refer to Figure 1 , Figure 1 is a module schematic diagram of a current-summing multi-input transconductance-capacitor type pulse shaper circuit provided by an embodiment of the present application. It can be seen from Figure 1 that it includes: A plurality of first transconductances, where the first transconductance is used to convert an input voltage signal into a current signal; a current summing node, connected to the output ends of the plurality of first transconductances, and configured to superimpose the current signals output by the plurality of first transconductances to form a total current signal; a conversion unit, connected to the current summing node, and configured to convert the total current signal into a pulse voltage signal and output it.

[0023] In this embodiment, the first transconductor is the input end of the current-adding multi-input transconductor capacitive pulse shaper circuit. Multiple first transconductors can realize simultaneous reception of multiple voltage signals, which can come from a charge-sensitive amplifier. Each of the multiple first transconductors can convert the voltage signal into a current signal, and then output it to a current adding node. The current adding node can be a node where the current signals output by the multiple first transconductors converge. The current value of the node is the sum of the current signals output by the multiple first transconductors, that is, the total current signal. This embodiment does not limit the number of first transconductors, as long as it can meet actual needs.

[0024] Then the total current signal is output to the conversion module, which can be a circuit that converts the total current signal into a pulse voltage signal, and then outputs the pulse voltage signal. That is, the voltage signals input from multiple channels are transmitted through the current addition node connected to the output ends of multiple first transconductors, and the pulse voltage signal is outputted using only one channel from the current addition node to the conversion module, so as to save the layout area, so that multiple channels or pixels share a pulse shaper circuit, leaving a larger area for the comparator, reducing the offset voltage of the comparator, and improving the signal-to-noise ratio of the overall signal path, thereby improving the detection accuracy, and solving the problems of large comparator offset voltage, reduced detection accuracy, and low readout rate caused by a large number of channels and limited single-channel area.

[0025] For example, in a multi-channel radiation detector, the signal strength of each channel is weak. By converting the signals of multiple channels into current and adding them together, the signal strength can be enhanced. For example, if the input signal of each channel is 10mV, after transconductance conversion to 10μA current and then adding them together, the total current of the two channels is 20μA. After passing through the conversion unit, the output pulse voltage signal is stronger, which improves the reliability of subsequent processing.

[0026] In summary, by converting multiple input voltage signals into current signals, superimposing them at the current addition node, and then outputting pulse voltage signals through the conversion unit, effective integration and shaping of multiple signals is achieved. This design saves layout area, allows multiple channels or pixels to share a pulse shaper, and leaves more space for the comparator, thereby reducing the offset voltage of the comparator and improving the signal-to-noise ratio and detection accuracy.

[0027] In a specific embodiment, it also includes: a second transconductor, wherein the positive input terminal of the second transconductor is connected to the output terminal of the conversion unit, the negative input terminal of the second transconductor is connected to the voltage source, and the output terminal of the second transconductor is connected to the negative output terminal of the first transconductor, and is configured to convert the pulse voltage signal into a feedback voltage signal and output it to the negative input terminal of the first transconductor.

[0028] In this embodiment, referring to Figure 1 , it further includes a second transconductance. The positive input terminal of the second transconductance is connected to the output terminal of the conversion unit, the negative input terminal of the second transconductance is connected to the voltage source, and the output terminal of the second transconductance is connected to the negative output terminal of the first transconductance. By introducing the second transconductance, a negative feedback loop can be formed to convert the pulse voltage signal into a feedback voltage signal and feed it back to the negative input terminal of the first transconductance, which can stabilize the output signal of the first transconductance, improve the linearity and accuracy, and enhance the anti-interference ability. The second transconductance in this embodiment is an electronic component that converts the pulse voltage signal into a feedback voltage signal.

[0029] In a specific embodiment, referring to Figure 1 , it further includes: a first capacitor. Wherein, the first end of the first capacitor is connected to the output terminal of the second transconductance, and the second end of the first capacitor is grounded, and is configured to filter the feedback voltage signal.

[0030] In this embodiment, the first end of the first capacitor is connected to the output terminal of the second transconductance, and the second end of the first capacitor is grounded. The first capacitor can filter the feedback voltage signal, remove high-frequency noise and ripple, and make the feedback voltage signal input to the first transconductance more smoothly and stably.

[0031] In a specific embodiment, referring to Figure 1 , the conversion unit includes: a third transconductance; wherein, the output terminal of the third transconductance is respectively connected to the current summing node, the positive input terminal of the second transconductance and the negative input terminal of the third transconductance, and the first input terminal of the third transconductance is connected to the voltage source, and is configured to convert the total current signal into the pulse voltage signal.

[0032] In this embodiment, the third transconductance can convert the total current signal into a pulse voltage signal, and at the same time can make the current summing node a low-resistance node, ensuring the stability of the loop, improving the gain and linearity of signal conversion, and ensuring the accuracy and stability of signal processing.

[0033] In a specific embodiment, referring to Figure 1 , the conversion unit further includes: a second capacitor; wherein, the first end of the second capacitor is connected to the output terminal of the third transconductance, and the second end is grounded, and is configured to filter the pulse voltage signal.

[0034] In this embodiment, the second capacitor filters the pulse voltage signal, removes high-frequency interference, makes the output signal clearer and more accurate, and improves the judgment accuracy of the subsequent comparator. For example, if there are high-frequency glitches (such as 20 kHz interference) in the pulse voltage signal output by the third transconductance, the second capacitor can filter out these interferences and make the output signal smoother.

[0035] In a specific embodiment, the parameters of the first transconductance, the second transconductance, the third transconductance, the first capacitor and the second capacitor are adjustable to adapt to voltage signals of different frequencies and amplitudes.

[0036] In this embodiment, by adjusting the parameters of the first transconductance, the second transconductance, the third transconductance, the first capacitor and the second capacitor, the circuit can adapt to input signals of different frequencies and amplitudes, enhancing the versatility and flexibility and meeting the requirements of various application scenarios.

[0037] Exemplarily, in low-energy radiation detection, the input signal frequency is relatively low (such as 1 kHz). By adjusting the capacitance value of the first capacitor from 1 pF to 2 pF, the cut-off frequency of the circuit can be reduced to adapt to the low-frequency signal. In high-energy radiation detection, the input signal frequency is relatively high (such as 1 MHz). By adjusting the transconductance value (such as from 1 mS to 2 mS), the gain of the circuit can be increased to adapt to the high-frequency signal.

[0038] In a specific embodiment, the current summing node is a low-impedance node, which is configured to ensure stable summation of the current signals output by multiple first transconductances.

[0039] In this embodiment, the current summing node is a low-impedance node, ensuring that multiple current signals can be stably superimposed, avoiding signal distortion caused by too high node impedance, and improving the accuracy and reliability of signal processing. For example: assuming that the current signals of two channels are 10 μA and 20 μA respectively, the low-impedance current summing node can ensure stable superposition of these two current signals to 30 μA without signal loss or distortion caused by too high node impedance.

[0040] Exemplarily, the application of the multi-input transconductance-capacitor type pulse shaper circuit with current summing provided in this embodiment will be elaborated in detail by combining Figure 2 to: Before elaboration, first assume that the multi-input transconductance-capacitor type pulse shaper circuit with current summing has only one first transconductance of G m1 , and the second transconductance is G m2 , and the transfer function from input to output is:

[0041]

[0042] where C1 is the first capacitor, C2 is the second capacitor, G m1 is the first transconductance, G m2 is the second transconductance, and s is the complex frequency of the Laplace transform.

[0043] Figure 21 is a schematic diagram of a current-adding multi-input transconductor capacitor-type pulse shaper circuit provided in an embodiment of the present application. As can be seen from the figure, the current adding node is A, the first transconductance is G m1-1 With the second transconductance G m1-2 Both are first transconductance, G ms is the third transconductance. Among them, G m1-1 The voltage signal Vin1 can be converted into a current I 1 , G m1-2 The voltage signal Vin2 can be converted into a current I 2 Then they are superimposed at the current adding node A to form the total current signal I 总 =I 1+ I 2 . Then through the conversion module g ms The conversion and filtering of the second capacitor finally obtain a pulse voltage signal which is output to the comparator. The comparator then compares the pulse voltage signal to determine whether the energy range of the pulse voltage signal meets the requirements.

[0044] Reference Figure 3 , Figure 3 Schematic diagram of a module of a current-adding multi-input transconductor-capacitor pulse shaper device provided in an embodiment of the present application, Figure 3 It can be seen that the multi-input transconductor capacitor type pulse shaper device includes a comparator and a multi-input transconductor capacitor type pulse shaper circuit; The comparator is connected to the output end of the conversion unit and is configured to compare the pulse voltage signal with a preset threshold to determine whether the pulse voltage signal meets a trigger condition; wherein the trigger condition is used to characterize that the comparator outputs a start signal.

[0045] In this embodiment, a comparator is combined to compare the pulse voltage signal with a threshold value to determine whether the trigger condition is met, thereby achieving real-time monitoring and trigger control of the signal. For example, assuming that the amplitude of the pulse voltage signal is 0.6V and the preset threshold is 0.5V. After the comparator detects that the signal amplitude exceeds the threshold, it outputs a start signal to trigger subsequent data collection or alarm operations.

[0046] In a specific embodiment, referring to Figure 3 , also includes: multiple charge-sensitive amplifiers and multiple radiation detectors; wherein a charge-sensitive amplifier is respectively connected to a radiation detector and a first transconductor; wherein the charge-sensitive amplifier is configured to convert the radiation signal output by the radiation detector into the voltage signal and output it to the first transconductor.

[0047] In this embodiment, the signals output by the radiation detector are usually very weak and are easily interfered by noise. By initially amplifying the signals with a charge-sensitive amplifier, the amplitude of the signals can be significantly increased, thereby enhancing the ratio of the signals to noise (i.e., the signal-to-noise ratio). This enables subsequent circuits to process the signals more accurately, reducing the possibility of misjudgment and missed judgment. Secondly, by initially amplifying the signals with a charge-sensitive amplifier, the subsequent transconductance conversion and pulse shaping circuits can process stronger signals, thereby reducing the requirements for the gain and noise control of these circuits.

[0048] In a specific embodiment, the radiation detector is a pixel-type radiation detector or a multi-channel radiation detector.

[0049] In this embodiment, by adopting a pixel-type or multi-channel radiation detector, the detection area can be divided into multiple independent pixels or channels, and each unit can independently detect the incident radiation signals, thereby achieving high spatial resolution and multi-point detection capabilities. This not only significantly improves the spatial resolution and multi-point detection capabilities of the system, but also enhances the efficiency, flexibility, and reliability of signal processing.

[0050] Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0051] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods and devices according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the processes and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal devices generate a device for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0052] These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing terminal devices to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured product including an instruction device, and the instruction device realizes the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0053] These computer program instructions may also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable terminal device provide for implementing the process Figure 1 in one process or multiple processes and / or blocks Figure 1 steps for the functions specified in one block or multiple blocks.

[0054] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0055] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0056] The above has introduced in detail a current-summing multi-input transconductance-capacitor pulse shaper circuit and device provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A current-adding multi-input transconductor-capacitor pulse shaper circuit, characterized in that: include: A plurality of first transconductors, wherein the first transconductors are used to convert an input voltage signal into a current signal; a current adding node connected to the output ends of the plurality of first transconductors and configured to add the current signals output by the plurality of first transconductors to form a total current signal; The conversion unit is connected to the current adding node and is configured to convert the total current signal into a pulse voltage signal for output.

2. The multi-input transconductor-capacitor pulse shaper circuit according to claim 1, characterized in that: Also includes: A second transconductor, wherein the positive input terminal of the second transconductor is connected to the output terminal of the conversion unit, the negative input terminal of the second transconductor is connected to the voltage source, and the output terminal of the second transconductor is connected to the negative output terminal of the first transconductor, and is configured to convert the pulse voltage signal into a feedback voltage signal and output it to the negative input terminal of the first transconductor.

3. The multi-input transconductor-capacitor pulse shaper circuit according to claim 2, characterized in that: Also includes: A first capacitor, wherein a first end of the first capacitor is connected to the output end of the second transconductor, a second end of the first capacitor is grounded, and is configured to filter the feedback voltage signal.

4. The multi-input transconductor-capacitor pulse shaper circuit according to claim 3, characterized in that: The conversion unit includes: a third transconductor; wherein the output end of the third transconductor is respectively connected to the current addition node, the positive input end of the second transconductor and the negative input end of the third transconductor, and the first input end of the third transconductor is connected to the voltage source, and is configured to convert the total current signal into the pulse voltage signal.

5. The multi-input transconductor-capacitor pulse shaper circuit according to claim 4, characterized in that: The conversion unit further includes: a second capacitor; wherein a first end of the second capacitor is connected to the output end of the third transconductor, a second end of the second capacitor is grounded, and the second capacitor is configured to filter the pulse voltage signal.

6. The multi-input transconductor-capacitor pulse shaper circuit according to claim 5, characterized in that: Parameters of the first transconductance, the second transconductance, the third transconductance, the first capacitor, and the second capacitor are adjustable to adapt to the voltage signals of different frequencies and amplitudes.

7. The multi-input transconductor-capacitor pulse shaper circuit according to claim 1, characterized in that: The current adding node is a low-resistance node, and is configured to ensure stable addition of the current signals output by the plurality of first transconductors.

8. A multi-input transconductor-capacitor pulse shaper device, characterized in that: A comparator comprising a multi-input transconductor-capacitor pulse shaper circuit as claimed in any one of claims 1 to 7; The comparator is connected to the output end of the conversion unit and is configured to compare the pulse voltage signal with a preset threshold to determine whether the pulse voltage signal meets a trigger condition; wherein the trigger condition is used to characterize that the comparator outputs a start signal.

9. The multi-input transconductor-type pulse shaper device according to claim 8, characterized in that: Also includes: Multiple charge-sensitive amplifiers and multiple radiation detectors; wherein a charge-sensitive amplifier is respectively connected to a radiation detector and a first transconductor; wherein the charge-sensitive amplifier is configured to convert the radiation signal output by the radiation detector into the voltage signal and output it to the first transconductor.

10. The multi-input transconductor-capacitor pulse shaper device according to claim 9, characterized in that: The radiation detector is a pixel-type radiation detector or a multi-channel radiation detector.

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