CN202916447U - MRPC detector front-end electronics module - Google Patents
MRPC detector front-end electronics module Download PDFInfo
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- CN202916447U CN202916447U CN 201220556662 CN201220556662U CN202916447U CN 202916447 U CN202916447 U CN 202916447U CN 201220556662 CN201220556662 CN 201220556662 CN 201220556662 U CN201220556662 U CN 201220556662U CN 202916447 U CN202916447 U CN 202916447U
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Abstract
The utility model provides a MRPC detector front-end electronics module. The MRPC detector front-end electronics module specifically comprises a current differential signal preamplifier, an adder, a high-speed comparator, an inverter and a secondary fast amplifier. The input ends of the current differential signal preamplifier are connected with the signal output ends of a MRPC detector through twisted pairs, the positive polarity signal output end of the current differential signal preamplifier is connected with the positive input end of the fast comparator, and the negative polarity signal output end of the current differential signal preamplifier is superimposed with a positive threshold direct-current voltage through the adder and then is connected with the negative input end of the fast comparator. The signal output end of the fast comparator is connected with the signal input end of the inverter, and the signal output end of the inverter is connected with a time measuring unit of the measuring system. The positive polarity and negative polarity output ends of the current differential signal preamplifier are connected with the signal positive and negative input ends of the secondary fast amplifier respectively, and the signal output end of the secondary fast amplifier is connected with a charge measuring unit of the measuring system. The circuit board adopts a six-layer board design, and independent power layers, ground layers and signal layers are adopted, wherein the signal layers and the power layers are isolated through the ground layers.
Description
Technical field
The utility model relates to nuclear radiation detection signal acquisition field, is specifically related to MRPC detector front end electronics technology.
Background technology
Flight time (TOF) detector based on many gap Resistive Plate Chambers (MRPC) is one of main detector in the large-scale experimental devices such as ALICE, CBM, STAR, NICA, MRPC detector in these experimental system setup needs a large amount of front-end electronics passages, and these electronics generally adopt the NINO technology to amplify transmission and adopt the HPTDC technology to carry out digitizing.For some small-sized TOF test macros, such as cosmic rays test and the Ion Beam Experiment of MRPC detector model machine performance, it is more satisfactory technical scheme that simple front-end electronics system cooperates high-speed data to obtain system.MRPC detector output current signal is little and pulse front edge is fast and narrow, and electric current is generally several nA, and the rise time is several ns, can reduce the gitter that pulse front edge is screened.Utilizing MRPC to do in the detection of particle flight time, need to obtain the amplitude information of detector output pulse signal and the temporal information in its forward position.Because be subject to the restriction of the factors such as amplifier band width, amplification slewing rate, noise, general preposition current mode amplifier can't satisfy this requirement.
The utility model provides a kind of technique device of innovation, and the follow-up time measuring unit is convenient in the amplification moulding that realization MRPC detector is exported faint fast current signal and the amplitude measurement unit is measured.That a kind of MRPC detector front end electronics module that the utility model provides has is cheap, easy to make, be convenient to the advantages such as rapid-assembling test macro.
Summary of the invention
The purpose of this utility model is characteristics little for MRPC detector output current signal and that pulse front edge is fast and narrow, and a kind of effective MRPC detector front end electronics module is provided.The reasonable mature and feasible of technical scheme that the utility model provides, theoretical foundation is abundant.
For reaching the utility model purpose of above-mentioned a kind of MRPC detector front end electronics module, the technical scheme that adopts specifically comprises: current difference signal prime amplifier, totalizer, high-speed comparator, reverser and secondary fast amplifier; Current difference signal prime amplifier input end links to each other with MRPC detector signal output terminal by twisted-pair feeder, the positive polarity of signal output part connects quick comparer positive input terminal, and negative polarity superposes by totalizer and connects quick comparer negative input end after the positive threshold value DC voltage; The comparator signal output terminal connects the reverser signal input part fast, and the reverser signal output part links to each other with the time measuring unit of measuring system; Current difference signal prime amplifier positive-negative polarity output terminal connects respectively again secondary fast amplifier signal positive-negative input end, and secondary fast amplifier signal output part links to each other with the charge measurement unit of measuring system; Circuit board adopts the design of six laminates, adopts independently bus plane, stratum and signals layer, passes through formation isolation between signals layer and the bus plane.
A kind of MRPC detector front end electronics module that provides according to the utility model, it is characterized in that: described current difference signal prime amplifier adopts MAX3760 low noise chip, for differential current signal input and differential amplitude signal output form, possess low noise, broadband, low-power consumption characteristics; The in addition signal moulding that links to each other with the current differential amplifier signal input part and impedance matching network (R3, C3, R8, R9) and the Schottky bilateral diode D1 that shields.
According to a kind of MRPC detector front end electronics module that the utility model provides, it is characterized in that: the signal input line of described current difference signal prime amplifier and output line separate cabling or cross wiring; Signal input part by grounded shield ring Perfect Ring around.
A kind of MRPC detector front end electronics module that provides according to the utility model, it is characterized in that: described secondary fast amplifier adopts the AD8001AR chip, input end connects signal impedance matching network (C1, R2, C7, R15), output terminal connects signal impedance matching network (R17, C9), amplify by negative feedback network (R16, R19).
A kind of MRPC detector front end electronics module that provides according to the utility model, it is characterized in that: described quick comparer adopts the AD96685BR chip, the signal output part of current difference signal prime amplifier is by differentiating circuit (C4, R4 and C5, R12) and impedance matching resistance (R6, R10) connect quick comparer, limit the locking control end LE of capacitor C 6 and pull-up resistor R7 control AD96685BR by potential-divider network (R11, R13) and pulse width.
A kind of MRPC detector front end electronics module that provides according to the utility model, it is characterized in that: described totalizer is by threshold value setting network (R12, R14, R18, C8, C10) consist of, input end connect threshold voltage VTH is for quick comparer negative signal input end provides a dc offset voltage.
A kind of MRPC detector front end electronics module according to the utility model provides is characterized in that: described reverser is by Technitron Q1, pull-up resistor R1, reverser direct current biasing resistance R 5, and power filtering capacitor C2 consists of.
Description of drawings
Accompanying drawing 1 is a kind of MRPC detector front end electronics modular system pie graph;
Accompanying drawing 2 is a kind of MRPC detector front end electronics module circuit diagram;
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Fig. 1 is a kind of MRPC detector front end electronics modular system pie graph; As shown in the figure, specifically comprise: current difference signal prime amplifier, totalizer, high-speed comparator, reverser and secondary fast amplifier; Current difference signal prime amplifier input end links to each other with MRPC detector signal output terminal by twisted-pair feeder, the positive polarity of signal output part connects quick comparer positive input terminal, and negative polarity superposes by totalizer and connects quick comparer negative input end after the positive threshold value DC voltage; The comparator signal output terminal connects the reverser signal input part fast, and the reverser signal output part links to each other with the time measuring unit of measuring system; Current difference signal prime amplifier positive-negative polarity output terminal connects respectively again secondary fast amplifier signal positive-negative input end, and secondary fast amplifier signal output part links to each other with the charge measurement unit of measuring system; Circuit board adopts the design of six laminates, adopts independently bus plane, stratum and signals layer, passes through formation isolation between signals layer and the bus plane.
Fig. 2 is a kind of MRPC detector front end electronics module circuit diagram; The current difference signal prime amplifier adopts MAX3760 low noise chip, for differential current signal input and differential amplitude signal output form, possesses low noise, broadband, low-power consumption characteristics; The in addition signal moulding that links to each other with the current differential amplifier signal input part and impedance matching network (R3, C3, R8, R9) and the Schottky bilateral diode D1 that shields.The signal input line of current difference signal prime amplifier and output line separate cabling or cross wiring; Signal input part by grounded shield ring Perfect Ring around.The secondary fast amplifier adopts the AD8001AR chip, and input end connects signal impedance matching network (C1, R2, C7, R15), and output terminal connects signal impedance matching network (R17, C9), and (R16, R19) amplifies by negative feedback network.Comparer adopts the AD96685BR chip fast, the signal output part of current difference signal prime amplifier is by differentiating circuit (C4, R4 and C5, R12) and impedance matching resistance (R6, R10) connect quick comparer, limit the locking control end LE of capacitor C 6 and pull-up resistor R7 control AD96685BR by potential-divider network (R11, R13) and pulse width.Totalizer is made of threshold value setting network (R12, R14, R18, C8, C10), and input end connect threshold voltage VTH is for quick comparer negative signal input end provides a dc offset voltage.Reverser is by Technitron Q1, pull-up resistor R1, reverser direct current biasing resistance R 5, and power filtering capacitor C2 consists of.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these various improvements and modifications that do not need creative work just can make also should be considered as protection domain of the present utility model.
Claims (7)
1. a MRPC detector front end electronics module is characterized in that: specifically comprise current difference signal prime amplifier, totalizer, high-speed comparator, reverser and secondary fast amplifier; Current difference signal prime amplifier input end links to each other with MRPC detector signal output terminal by twisted-pair feeder, the positive polarity of signal output part connects quick comparer positive input terminal, and negative polarity superposes by totalizer and connects quick comparer negative input end after the positive threshold value DC voltage; The comparator signal output terminal connects the reverser signal input part fast, and the reverser signal output part links to each other with the time measuring unit of measuring system; Current difference signal prime amplifier positive-negative polarity output terminal connects respectively again secondary fast amplifier signal positive-negative input end, and secondary fast amplifier signal output part links to each other with the charge measurement unit of measuring system; Circuit board adopts the design of six laminates, adopts independently bus plane, stratum and signals layer, passes through formation isolation between signals layer and the bus plane.
2. a kind of MRPC detector front end electronics module according to claim 1, it is characterized in that: described current difference signal prime amplifier adopts MAX3760 low noise chip, for differential current signal input and differential amplitude signal output form, possess low noise, broadband, low-power consumption characteristics; The in addition signal moulding that links to each other with the current differential amplifier signal input part and impedance matching network (R3, C3, R8, R9) and the Schottky bilateral diode D1 that shields.
3. a kind of MRPC detector front end electronics module according to claim 1, it is characterized in that: the signal input line of described current difference signal prime amplifier and output line separate cabling or cross wiring; Signal input part by grounded shield ring Perfect Ring around.
4. a kind of MRPC detector front end electronics module according to claim 1, it is characterized in that: described secondary fast amplifier adopts the AD8001AR chip, input end connects signal impedance matching network (C1, R2, C7, R15), output terminal connects signal impedance matching network (R17, C9), amplify by negative feedback network (R16, R19).
5. a kind of MRPC detector front end electronics module according to claim 1, it is characterized in that: described quick comparer adopts the AD96685BR chip, the signal output part of current difference signal prime amplifier is by differentiating circuit (C4, R4 and C5, R12) and impedance matching resistance (R6, R10) connect quick comparer, limit the locking control end LE of capacitor C 6 and pull-up resistor R7 control AD96685BR by potential-divider network (R11, R13) and pulse width.
6. a kind of MRPC detector front end electronics module according to claim 1, it is characterized in that: described totalizer is by threshold value setting network (R12, R14, R18, C8, C10) consist of, input end connect threshold voltage VTH is for quick comparer negative signal input end provides a dc offset voltage.
7. a kind of MRPC detector front end electronics module according to claim 1 is characterized in that: described reverser is by Technitron Q1, pull-up resistor R1, reverser direct current biasing resistance R 5, and power filtering capacitor C2 consists of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556662 CN202916447U (en) | 2012-10-29 | 2012-10-29 | MRPC detector front-end electronics module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556662 CN202916447U (en) | 2012-10-29 | 2012-10-29 | MRPC detector front-end electronics module |
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| CN202916447U true CN202916447U (en) | 2013-05-01 |
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| CN 201220556662 Expired - Fee Related CN202916447U (en) | 2012-10-29 | 2012-10-29 | MRPC detector front-end electronics module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954986A (en) * | 2014-04-17 | 2014-07-30 | 清华大学 | Multiplexing reading method and system of high-position-resolution MRPC detector |
| CN113434346A (en) * | 2021-05-26 | 2021-09-24 | 成都天奥信息科技有限公司 | Automatic detection method and system for differential signal polarity connection |
-
2012
- 2012-10-29 CN CN 201220556662 patent/CN202916447U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954986A (en) * | 2014-04-17 | 2014-07-30 | 清华大学 | Multiplexing reading method and system of high-position-resolution MRPC detector |
| CN113434346A (en) * | 2021-05-26 | 2021-09-24 | 成都天奥信息科技有限公司 | Automatic detection method and system for differential signal polarity connection |
| CN113434346B (en) * | 2021-05-26 | 2023-08-04 | 成都天奥信息科技有限公司 | Automatic detection method and system for differential signal polarity connection |
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| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20131029 |