CN208608965U - A kind of pre-amplification circuit - Google Patents
A kind of pre-amplification circuit Download PDFInfo
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- CN208608965U CN208608965U CN201821135159.4U CN201821135159U CN208608965U CN 208608965 U CN208608965 U CN 208608965U CN 201821135159 U CN201821135159 U CN 201821135159U CN 208608965 U CN208608965 U CN 208608965U
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- operational amplifier
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- amplification circuit
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Abstract
The utility model provides a kind of pre-amplification circuit, it is related to the technical field of energy spectrum analysis, it include: operational amplifier, feed circuit and zeroing match circuit, wherein, feed circuit is connected with the negative input of operational amplifier and feedback end respectively, and zeroing match circuit is connected with the electrode input end of operational amplifier and ground terminal respectively；Operational amplifier is for amplifying processing to the core pulse signal of input；Feed circuit is used to feed back to the voltage signal that the feedback end of operational amplifier exports the negative input of operational amplifier；Zeroing match circuit is for carrying out zeroing processing to operational amplifier.The utility model solves the existing pre-amplification circuit complicated composition for being able to carry out core pulse signal energy spectrum analysis, debug complicated technical problem, reach and a kind of new pre-amplification circuit is provided, and the composition of the circuit is simple, the simple technical effect of the debugging of circuit.
Description
Technical field
The present invention relates to the technical fields of energy spectrum analysis, more particularly, to a kind of pre-amplification circuit.
Background technique
Instantly, power spectrum refers to that counting rate just can be obtained with the distribution curve of particle energy, quilt in impulse amplitude after energy calibration
It is widely used in the multiple fields such as medicine, aerospace, core research, material domain component element type and content can be divided
Analysis.It currently used for the amplifying circuit of energy spectrum analysis, is all each company's autonomous Design or commission research and development, it is certain from external import
Detector has energy spectrum analysis amplifying circuit, but at high cost, and procurement cycle is long, difficult in maintenance.
It is traditionally used for the front-end amplifier of power spectrum processing, as voltage amplifier, charge amplifier, current sensitive are put
Big device needs subsequent conditioning circuit cooperation to handle.For example, it is desired to processing circuit carries out post forming to amplifier treated signal,
By amplifying circuit to amplifier treated the width of signal and the control of amplitude, passes through filter circuit and improve amplifier processing
Signal-to-Noise afterwards, occurs that complicated composition, suitability are poor, debugging is difficult so as to cause existing pre-amplification circuit, volume
The disadvantages of big.
In view of the above-mentioned problems, not putting forward effective solutions also.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of pre-amplification circuit, to alleviate existing be able to carry out
The pre-amplification circuit complicated composition of core pulse signal energy spectrum analysis debug complicated technical problem.
In a first aspect, the pre-amplification circuit includes: that operation is put the embodiment of the invention provides a kind of pre-amplification circuit
Big device, feed circuit and zeroing match circuit, wherein the feed circuit negative input with the operational amplifier respectively
It is connected with feedback end, the zeroing match circuit is connected with the electrode input end of the operational amplifier and ground terminal respectively
It connects；The operational amplifier is for amplifying processing to the core pulse signal of input；The feed circuit is used for the fortune
The voltage signal for calculating the feedback end output of amplifier feeds back to the negative input of the operational amplifier；The zeroing matching electricity
Road is for carrying out zeroing processing to the operational amplifier.
Further, the feed circuit includes: first resistor and first capacitor；The first end of the first resistor and institute
The negative input for stating operational amplifier is connected, and second end is connected with the feedback end of the operational amplifier；Described first
The first end of capacitor is connected with the negative input of the operational amplifier, the feedback end of second end and the operational amplifier
It is connected.
Further, the resistance magnitude of the first resistor is Ω grades.
Further, the first capacitor is pF grades.
Further, the zeroing match circuit includes: second resistance and the second capacitor；The first end of the second resistance
It is connected with ground terminal, second end is connected with the electrode input end of the operational amplifier；The first end of second capacitor
It is connected with ground terminal, second end is connected with the electrode input end of the operational amplifier.
Further, the resistance magnitude of the second resistance is Ω grades.
Further, the capacitor magnitude of second capacitor is pF grades.
Further, the operational amplifier: voltage feedback type preamplifier.
In embodiments of the present invention, a kind of new preposition amplification that energy spectrum analysis can be carried out to core pulse signal is provided
Circuit, by the way that by core pulse signal input operational amplifier, operational amplifier is when amplifying processing to core pulse signal, instead
The voltage signal that the feedback end of operational amplifier exports is fed back to the negative input of operational amplifier, zeroing matching by current feed circuit
Circuit is used to carry out zeroing processing to operational amplifier, and above-mentioned feed circuit and zeroing match circuit by a capacitor and
One resistance composition, and then it is multiple to solve the existing pre-amplification circuit composition for being able to carry out core pulse signal energy spectrum analysis
It is miscellaneous, complicated technical problem is debugged, has reached that provide a kind of circuit composition simple, the simple pre-amplification circuit of circuit debugging
Technical effect.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification, claims
And specifically noted structure is achieved and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of schematic diagram of pre-amplification circuit provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the core pulse signal provided in an embodiment of the present invention without pre-amplification circuit processing；
Fig. 3 is the schematic diagram of the core pulse signal provided in an embodiment of the present invention handled by pre-amplification circuit；
Fig. 4 is the schematic diagram of another pre-amplification circuit provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Fig. 1 is a kind of pre-amplification circuit according to an embodiment of the present invention, as shown in Figure 1, the pre-amplification circuit includes:
Operational amplifier 10, feed circuit 20 and zeroing match circuit 30, wherein the feed circuit 20 respectively with the operation amplifier
The negative input of device 10 is connected with feedback end, and the zeroing matches the 30 circuits anode with the operational amplifier 10 respectively
Input terminal is connected with ground terminal；
The operational amplifier 10 is for amplifying processing to the core pulse signal of input.
The feed circuit 20 is used to feed back to the voltage signal that the feedback end of the operational amplifier 10 exports described
The negative input of operational amplifier 10.
The zeroing match circuit 30 is for carrying out zeroing processing to the operational amplifier 10.
In embodiments of the present invention, a kind of new preposition amplification that energy spectrum analysis can be carried out to core pulse signal is provided
Circuit, by the way that by core pulse signal input operational amplifier, operational amplifier is when amplifying processing to core pulse signal, instead
The voltage signal that the feedback end of operational amplifier exports is fed back to the negative input of operational amplifier, zeroing matching by current feed circuit
Circuit is used to carry out operational amplifier zeroing processing, and above-mentioned feed circuit and zeroing match circuit are by a capacitor
It is formed with a resistance, and then solves the existing pre-amplification circuit composition for being able to carry out core pulse signal energy spectrum analysis
Complexity debugs complicated technical problem, has reached simple, the simple pre-amplification circuit of circuit debugging that provides a kind of circuit composition
Technical effect.
It should be noted that as shown in Fig. 2, Fig. 2 be without the signal amplification circuit core pulse signal schematic diagram,
Core pulse signal is input in operational amplifier from the negative input of operational amplifier, and above-mentioned operational amplifier uses voltage
Feedback-type preamplifier carries out integral forming by current-voltage transformation, amplifies place to the core pulse signal of input
Reason.
In addition, it should also be noted that, feed circuit feeds back to the voltage signal that the feedback end of operational amplifier exports
The negative input of operational amplifier, width that operational amplifier is exported by the voltage signal and pulse signal and amplitude
It is controlled.
In addition, it should also be noted that, as shown in figure 3, Fig. 3 is amplified by the pre-amplification circuit and pulse is believed
Number schematic diagram, by above-mentioned pre-amplification circuit treated core pulse signal, direction, amplitude and core pulsewidth all occur
Variation, convenient for multichannel analyzer, to treated, core pulse signal is acquired and analyzes.
In embodiments of the present invention, as shown in figure 4, the feed circuit 20 includes: first resistor 21 and first capacitor 22；
The first end of the first resistor 21 is connected with the negative input of the operational amplifier 10, second end and institute
The feedback end for stating operational amplifier 10 is connected；
The first end of the first capacitor 22 is connected with the negative input of the operational amplifier 10, second end and institute
The feedback end for stating operational amplifier 10 is connected.
It should be noted that the resistance magnitude of above-mentioned first resistor is Ω grades；The capacitor magnitude of above-mentioned first capacitor
It is pF grades.
In embodiments of the present invention, as shown in figure 4, the zeroing match circuit 30 includes: second resistance 31 and the second electricity
Hold 32；
The first end of the second resistance 31 is connected with ground terminal, and second end and the anode of the operational amplifier 10 are defeated
Enter end to be connected；
The first end of second capacitor 32 is connected with ground terminal, and second end and the anode of the operational amplifier 10 are defeated
Enter end to be connected.
It should be noted that the resistance magnitude of above-mentioned second resistance is Ω grades；The capacitor magnitude of the second above-mentioned capacitor
It is pF grades.
Below in conjunction with Fig. 1 to Fig. 4, the workflow of above-mentioned pre-amplification circuit is introduced.
Firstly, in the cathode output end input operational amplifier that core pulse signal to be processed is passed through operational amplifier.
For operational amplifier when amplifying processing to the core pulse signal, feed circuit is by the feedback end of operational amplifier
The voltage signal of output feeds back to the negative input of operational amplifier, the sum exported by the voltage signal to operational amplifier
The width and amplitude of pulse signal are controlled, i.e., by the capacitance of the resistance value of first resistor and first capacitor to operational amplifier
Output and pulse signal width and amplitude are controlled.
So as to enable to facilitate by the core pulse signal of operational amplifier enhanced processing multichannel analyzer into
Row signal acquisition and signal analysis.
Finally, the core pulse signal Jing Guo enhanced processing is sent to multi-channel pulse analysis by output end by operational amplifier
Device.
When debugging to above-mentioned pre-amplification circuit, resistance can be passed through by the feedback and zeroing capacitance of the circuit
Time, amplitude matching is formed in value, calculates separately out the resistance value of first resistor, the resistance value of second resistance, the appearance of first capacitor
Value, the capacitance of the second capacitor obtain calculated result.
The resistance value of second resistance and the capacitance of the second capacitor are generally related with the type selecting of amplifier, in the present invention, according to fortune
It puts type selecting to need the resistance value control of second resistance at Ω grades, the capacitance of the second capacitor is controlled at pF grades.
The value Yu input capacitance of the second capacitor are (that is, the output equivalent capacitor of front-end detector and operation on feed circuit
The input capacitance of amplifier itself) it is related, input capacitance will form a zero point in the transmission function of noise gain, pass through increasing
Add first capacitor to introduce a pole, so that the pre-amplification circuit is stablized, and obtains 45 ° of Phase margin.
It is assumed that the capacitance of first capacitor is C1, the resistance value of first resistor is R1, and the capacitance of input capacitance is C, operation amplifier
The unity gain bandwidth product of device is fu, then the capacitance C1 of first capacitor are as follows:
It should be noted that the capacitance C1 of first capacitor is calculating big probable value by above formula during actual motion
Afterwards, it also needs to adjust matching in actual circuit.
The resistance value R1 of first resistor can be handled according to the current value of input core pulse signal and by operational amplifier
The amplitude of core pulse signal afterwards is calculated according to Current Voltage transfer principle.
For example, operational amplifier output current value is 100uA, the full scale output voltage value of operational amplifier is 10V, then
The resistance value R1 of first resistor is 10V/100uA=100K Ω.
According to above-mentioned calculated result, which is debugged, the pre-amplification circuit can be made right
When the processing of core pulse signal, more ideal effect is obtained.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.The apparatus embodiments described above are merely exemplary, for example, the division of the circuit,
Only a kind of logical function partition, there may be another division manner in actual implementation, in another example, multiple circuits or component can
To combine or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be through some communication interfaces, device or circuit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.
The circuit as illustrated by the separation member may or may not be physically separated, aobvious as circuit
The component shown may or may not be physical circuit, it can and it is in one place, or may be distributed over multiple
On lattice network.It can select some or all of circuit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional circuit in each embodiment of the present invention can integrate in a processing circuit
It is that each circuit physically exists alone, it can also be with two or more circuit integrations in a circuit.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. a kind of pre-amplification circuit characterized by comprising operational amplifier, feed circuit and zeroing match circuit,
In, the feed circuit is connected with the negative input of the operational amplifier and feedback end respectively, the zeroing matching electricity
Road is connected with the electrode input end of the operational amplifier and ground terminal respectively；
The operational amplifier is for amplifying processing to the core pulse signal of input；
The feed circuit is used to the voltage signal that the feedback end of the operational amplifier exports feeding back to the operation amplifier
The negative input of device；
The zeroing match circuit is for carrying out zeroing processing to the operational amplifier.
2. pre-amplification circuit according to claim 1, which is characterized in that the feed circuit include: first resistor and
First capacitor；
The first end of the first resistor is connected with the negative input of the operational amplifier, and second end is put with the operation
The feedback end of big device is connected；
The first end of the first capacitor is connected with the negative input of the operational amplifier, and second end is put with the operation
The feedback end of big device is connected.
3. pre-amplification circuit according to claim 2, which is characterized in that the resistance magnitude of the first resistor is Ω
Grade.
4. pre-amplification circuit according to claim 2 or 3, which is characterized in that the first capacitor is pF grades.
5. pre-amplification circuit according to claim 1 or 2, which is characterized in that the zeroing match circuit includes: second
Resistance and the second capacitor；
The first end of the second resistance is connected with ground terminal, and second end is connected with the electrode input end of the operational amplifier
It connects；
The first end of second capacitor is connected with ground terminal, and second end is connected with the electrode input end of the operational amplifier
It connects.
6. pre-amplification circuit according to claim 5, which is characterized in that the resistance magnitude of the second resistance is Ω
Grade.
7. pre-amplification circuit according to claim 5, which is characterized in that the capacitor magnitude of second capacitor is pF
Grade.
8. pre-amplification circuit according to claim 1, which is characterized in that the model of the operational amplifier are as follows:
AD823。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821135159.4U CN208608965U (en) | 2018-07-17 | 2018-07-17 | A kind of pre-amplification circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821135159.4U CN208608965U (en) | 2018-07-17 | 2018-07-17 | A kind of pre-amplification circuit |
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| Publication Number | Publication Date |
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| CN208608965U true CN208608965U (en) | 2019-03-15 |
Family
ID=65669476
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| CN201821135159.4U Active CN208608965U (en) | 2018-07-17 | 2018-07-17 | A kind of pre-amplification circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117975A (en) * | 2019-06-21 | 2020-12-22 | 北京自动化控制设备研究所 | Self-zeroing device of preamplifier |
-
2018
- 2018-07-17 CN CN201821135159.4U patent/CN208608965U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117975A (en) * | 2019-06-21 | 2020-12-22 | 北京自动化控制设备研究所 | Self-zeroing device of preamplifier |
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