CN219435808U - Lens voltage shunt control circuit for mass spectrometer - Google Patents
Lens voltage shunt control circuit for mass spectrometer Download PDFInfo
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- CN219435808U CN219435808U CN202320701618.5U CN202320701618U CN219435808U CN 219435808 U CN219435808 U CN 219435808U CN 202320701618 U CN202320701618 U CN 202320701618U CN 219435808 U CN219435808 U CN 219435808U
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Abstract
The utility model discloses a lens voltage shunt control circuit for a mass spectrometer, which is characterized in that a plurality of voltage regulating circuits are connected with lenses in the mass spectrometer in a one-to-one correspondence manner, so that shunt control is realized to provide required voltages for the corresponding lenses, and the voltages of the corresponding lenses can be changed only by simply regulating voltage control signals provided by a main board to each voltage regulating circuit, thereby accurately controlling the electric field intensity; the output voltage configuration circuit can realize any output in any voltage range, is beneficial to improving safety, has wide application range and is convenient to adjust, and each lens is not required to be independently provided with a corresponding power supply module to provide high voltage, so that the miniaturization and low cost are facilitated; and the output voltage is fed back through the sampling circuit, whether the output voltage corresponding to the voltage regulating circuit is correct and stable is determined, the output voltage is monitored in real time, and the running stability of equipment is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of mass spectrometer circuits, and particularly relates to a lens voltage shunt control circuit for a mass spectrometer.
Background
A mass spectrometer is a high sensitivity, high resolution and high specificity analytical instrument for detecting the chemical composition of a sample. Firstly, converting a sample into gaseous ions, then separating the ions according to the mass-to-charge ratio (m/z) by an electric field or a magnetic field, measuring the intensity of the corresponding ions, and finally forming a mass spectrogram.
Under the premise of ensuring the high-vacuum working environment of related parts of the mass spectrometer, the components of the sample to be detected after gas chromatography separation flow out of the chromatographic column and flow into an ion source (electron bombardment ionization source (EI), electron Ionization) through a transmission line; the structure of the electron bombardment ionization source (EI) comprises an ionization chamber, a filament, a repulsive pole, a lens group, magnetic poles and the like, the electron bombardment ionization source (EI) releases high-energy electrons through the filament, compound molecules are cracked through collision, induction and other interactions under the action of a magnetic field and an electric field, and as the movement direction of ion fragments generated in the ionization chamber is divergent, in order to lead the ions out of the ionization region, the ions which are axially divergent are further accelerated and focused into an ion beam so as to reduce loss in transmission, and finally the ions are sent into a mass analyzer with smaller beam width and divergence angle, and the lens group is generally used for carrying out space focusing on the ions.
The lens group generally comprises a plurality of lenses, and different voltages are often required to be provided for each lens, and because the high-voltage power supply module for providing the voltage for the lenses can only provide a single voltage value, the output control has only one voltage, and the voltage value requirement of each lens has different changes in the actual use process, the single voltage value cannot meet the actual practical requirement and is not beneficial to debugging, so that the electric field intensity is difficult to accurately control, and the track precision of ions in space is not beneficial to improvement. In addition, since the high-voltage power module can only provide a single voltage value, it is generally required to provide a separate high-voltage power module for each lens in the prior art, which is disadvantageous in terms of miniaturization and cost reduction.
Disclosure of Invention
The utility model aims to solve the problems, and provides a lens voltage shunt control circuit for a mass spectrometer, which can be adjusted according to the voltage value requirement change of each lens, so that the electric field intensity is accurately controlled, the track precision of ions in space is improved, the safety and the stability of equipment are improved, and the miniaturization and the low cost are realized.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a lens voltage shunt control circuit for a mass spectrometer, the mass spectrometer comprises an electron bombardment ionization source, the electron bombardment ionization source comprises a lens group formed by at least one lens, the lens voltage shunt control circuit for the mass spectrometer comprises at least one voltage regulating circuit, the voltage regulating circuit is correspondingly connected with the lenses one by one and comprises a first operational amplifier circuit, a protection circuit, a push-pull circuit and an output voltage configuration circuit, wherein:
the first operational amplification circuit comprises a resistor R504, a resistor R510, an operational amplifier U164A, a capacitor C423, a capacitor C425 and a feedback circuit, wherein the positive power end of the operational amplifier U164A is connected with the positive electrode of a power supply and grounded through the capacitor C425, the negative power end of the operational amplifier U164A is connected with the negative electrode of the power supply and grounded through the capacitor C423, the non-inverting input end of the operational amplifier U is sequentially grounded through the resistor R504 and the resistor R510, the inverting input end of the operational amplifier U164A is connected with the output end of the operational amplifier U164A through the feedback circuit, and the common end of the resistor R504 and the resistor R510 is used as a voltage input end for receiving a voltage control signal sent by a main board;
the input end of the protection circuit is connected with the output end of the operational amplifier U164A, and the output end of the protection circuit is connected with the input end of the push-pull circuit and is used for realizing overvoltage protection;
the output voltage configuration circuit comprises a resistor R502, a resistor R517, a resistor R494, a capacitor C421, a resistor R486 and a resistor R487, wherein one end of the resistor R517 is connected with the input end of the push-pull circuit, the other end of the resistor R517 is used for receiving a first configuration voltage, one end of the resistor R494 is connected with the output end of the push-pull circuit and is also connected with the non-inverting input end of the operational amplifier U164A through the resistor R502, the other end of the resistor R494 is grounded through the capacitor C421, the common end of the resistor R494 and the capacitor C421 is used as a voltage output end for being connected with a corresponding lens, one end of the resistor R487 is connected with the output end of the push-pull circuit, and the other end of the resistor R486 is used for receiving a second configuration voltage.
Preferably, the voltage regulating circuit further comprises a sampling circuit, the sampling circuit comprises an operational amplifier U164B, a capacitor C419, a resistor R491 and a resistor R498, the output end of the operational amplifier U164B is used for feeding back a sampling signal to the main board, the non-inverting input end is grounded, the inverting input end is connected with the output end of the operational amplifier U164B through the capacitor C419 and the resistor R491 which are connected in parallel, the inverting input end is also connected with one end of the resistor R498, and the other end of the resistor R498 is connected with the common end of the resistor R502 and the resistor R494.
Preferably, the output voltage configuration circuit further includes a resistor R492 and a resistor R493, the resistor R492 and the resistor R493 being connected in series between the resistor R498 and the resistor R494.
Preferably, the protection circuit comprises a resistor R512, a diode D119 and an NPN triode Q126, wherein two ends of the resistor R512 are respectively connected with the output end of the operational amplifier U164A and the positive electrode of the diode D119, the negative electrode of the diode D119 is grounded, the base electrode of the NPN triode Q126 is connected with the negative electrode of the diode D119, the emitter electrode is connected with the positive electrode of the diode D119, and the collector electrode is connected with the input end of the push-pull circuit.
Preferably, the push-pull circuit includes a resistor R496, a resistor R500, a resistor R508, a resistor R516, a resistor R518, a PNP type triode Q128, a PNP type triode Q124, a PNP type triode Q122, and a resistor R506, wherein a base of the PNP type triode Q122 is sequentially connected with a collector of the PNP type triode Q122 through the resistor R500, the resistor R496, a collector is used as an output end of the push-pull circuit, an emitter is respectively connected with a base of the PNP type triode Q124 and one end of the resistor R506, a collector of the PNP type triode Q124 is connected with a collector of the PNP type triode Q122, an emitter is respectively connected with a collector of the PNP type triode Q128 and the other end of the resistor R506, a base of the PNP type triode Q128 is used as an input end of the push-pull circuit, an emitter is sequentially connected with a base of the PNP type triode Q122 through the resistor R518, the resistor R516, the resistor R508, and a common end of the resistor R516 is also connected with the other end of the resistor R517.
Preferably, the first configuration voltage is +50V and the second configuration voltage is-500V.
Preferably, the feedback circuit comprises a resistor R521, a resistor R522, a capacitor C427 and a capacitor C429, wherein two ends of the resistor R522 are respectively connected with one ends of the resistor R521 and the capacitor C427, the other end of the resistor R521 is grounded, the other end of the capacitor C427 is connected with the output end of the operational amplifier U164A, and two ends of the capacitor C429 are respectively connected with the common end of the resistor R521 and the resistor R522 and the output end of the operational amplifier U164A.
Preferably, the selection type of each operational amplifier is OP296GSZ.
Compared with the prior art, the utility model has the beneficial effects that:
1) The voltage regulating circuits are connected with the lenses in the mass spectrometer in a one-to-one correspondence manner, so that the shunt control is realized to provide required voltages for the corresponding lenses, and the voltage of the corresponding lenses can be changed only by simply regulating the voltage control signals provided by the main board to each voltage regulating circuit, thereby being beneficial to the adjustment of the voltage value requirement change of each lens in the actual use process, accurately controlling the electric field intensity and being beneficial to improving the track precision of ions in space;
2) Any output in any voltage range (namely any voltage value between the first configuration voltage and the second configuration voltage can be output) can be realized through the output voltage configuration circuit, the voltage range of the output voltage is limited, the safety is improved, the amplification factor of the operational amplifier and the output voltage range can be changed for adjustment, the application range is wide, and each lens is not required to be independently provided with a corresponding power supply module to provide high voltage, so that the miniaturization and the low cost are realized;
3) And the output voltage is fed back through the sampling circuit, whether the output voltage corresponding to the voltage regulating circuit is correct and stable is determined, the output voltage is monitored in real time, and the running stability of equipment is guaranteed.
Drawings
FIG. 1 is a block circuit diagram of a lens voltage shunt control circuit for a mass spectrometer of the present utility model;
fig. 2 is a circuit diagram of the voltage regulating circuit of the present utility model.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
As shown in fig. 1-2, a lens voltage shunt control circuit for a mass spectrometer comprises an electron bombardment ionization source, the electron bombardment ionization source comprises a lens group consisting of at least one lens, the lens voltage shunt control circuit for the mass spectrometer comprises at least one voltage regulating circuit, the voltage regulating circuit is connected with the lenses in a one-to-one correspondence manner, and the lens voltage shunt control circuit comprises a first operational amplifier circuit, a protection circuit, a push-pull circuit and an output voltage configuration circuit, wherein:
the first operational amplification circuit comprises a resistor R504, a resistor R510, an operational amplifier U164A, a capacitor C423, a capacitor C425 and a feedback circuit, wherein the positive power end of the operational amplifier U164A is connected with the positive electrode of a power supply and grounded through the capacitor C425, the negative power end of the operational amplifier U164A is connected with the negative electrode of the power supply and grounded through the capacitor C423, the non-inverting input end of the operational amplifier U is sequentially grounded through the resistor R504 and the resistor R510, the inverting input end of the operational amplifier U164A is connected with the output end of the operational amplifier U164A through the feedback circuit, and the common end of the resistor R504 and the resistor R510 is used as a voltage input end for receiving a voltage control signal sent by a main board;
the input end of the protection circuit is connected with the output end of the operational amplifier U164A, and the output end of the protection circuit is connected with the input end of the push-pull circuit and is used for realizing overvoltage protection;
the output voltage configuration circuit comprises a resistor R502, a resistor R517, a resistor R494, a capacitor C421, a resistor R486 and a resistor R487, wherein one end of the resistor R517 is connected with the input end of the push-pull circuit, the other end of the resistor R517 is used for receiving a first configuration voltage, one end of the resistor R494 is connected with the output end of the push-pull circuit and is also connected with the non-inverting input end of the operational amplifier U164A through the resistor R502, the other end of the resistor R494 is grounded through the capacitor C421, the common end of the resistor R494 and the capacitor C421 is used as a voltage output end for being connected with a corresponding lens, one end of the resistor R487 is connected with the output end of the push-pull circuit, and the other end of the resistor R486 is used for receiving a second configuration voltage.
The lens voltage shunt control circuit for the mass spectrometer can realize multipath voltage output, is mainly used for applying needed voltage on corresponding lenses, the output path number can be selected according to the types and the quantity of the lenses, and the voltage value can be adjusted according to the running track of ions in the mass spectrometer.
As shown in fig. 2, d2_set represents a voltage input terminal, a voltage control signal is supplied through the main board, and D2 represents a voltage output terminal for applying a desired voltage to a corresponding lens. In the first operational amplifier circuit, the positive power end of the operational amplifier U164A is connected with the positive electrode of the power supply, the voltage of the positive electrode of the power supply is +5V, and the negative power end is connected with the negative electrode of the power supply, the voltage of the negative electrode of the power supply is-5V. The voltage control signal is input to the voltage input terminal d2_set and is negatively amplified by the operational amplifier U164A, and the voltages at the same direction input terminal and the opposite direction input terminal of the operational amplifier U164A are always equal due to the feedback of the negative feedback signal.
Any output in any voltage range (namely, any voltage value between the first configuration voltage and the second configuration voltage can be output, for example, +50V to-500V in the embodiment), the voltage range of the output voltage is limited by the first configuration voltage (+50V) to the second configuration voltage (-500V), so that the safety is improved.
It should be noted that the first configuration voltage and the second configuration voltage are provided by a power supply module, the power supply module may be a high-voltage power supply module or a single chip microcomputer, and the first configuration voltage and the second configuration voltage may be adjusted according to actual requirements. The voltage input end d2_set and the voltage output end D2 can adopt the same chip, or can use the same type of different chips or different types of chips, and can be flexibly designed according to the layout of the circuit board. In this embodiment, +50v and-500V are voltages generated by different high-voltage power supply modules, and are used as references for setting output voltages, wherein the maximum value is +50v, the minimum value is-500V, and the setting range of the output voltages is between-500V and +50v; of course, the two values can be modified arbitrarily, for example, -300V, +40V is applied, and the setting range of the output voltage becomes between-300V and +40V. Under the condition that the power supply driving capability for providing voltage is enough, a plurality of voltage regulating circuits can be mounted, the work among the voltage regulating circuits is not affected, and the setting ranges of the output voltages of different voltage regulating circuits can be the same or different; the range of output voltages is controlled only by the voltages applied above (e.g., -500V and +50v voltages), but other values are also possible.
In an embodiment, the voltage adjusting circuit further includes a sampling circuit, where the sampling circuit includes an operational amplifier U164B, a capacitor C419, a resistor R491 and a resistor R498, an output end of the operational amplifier U164B is used for feeding back a sampling signal to the motherboard, an in-phase input end is grounded, an opposite input end is connected with the output end of the operational amplifier U164B through the capacitor C419 and the resistor R491 which are connected in parallel, and the opposite input end is also connected with one end of the resistor R498, and the other end of the resistor R498 is connected with a common end of the resistor R502 and the resistor R494.
As shown in fig. 2, d2_fb represents a sampling signal output end, the sampling circuit is used for performing sampling operation on an output voltage and feeding the output voltage back to the main board, and the main board determines whether the output voltage of the corresponding voltage regulating circuit is correct and stable according to the output value of the sampling circuit, so as to realize the monitoring function on the actual value of the output voltage.
In an embodiment, the output voltage configuration circuit further includes a resistor R492 and a resistor R493, where the resistor R492 and the resistor R493 are connected in series between the resistor R498 and the resistor R494.
In an embodiment, the protection circuit includes a resistor R512, a diode D119, and an NPN triode Q126, two ends of the resistor R512 are respectively connected to an output end of the operational amplifier U164A and an anode of the diode D119, a cathode of the diode D119 is grounded, a base of the NPN triode Q126 is connected to a cathode of the diode D119, an emitter is connected to an anode of the diode D119, and a collector is connected to an input end of the push-pull circuit. The protection circuit is used for realizing overvoltage protection, and the diode D119 is used for voltage clamping and preventing the emitter voltage of the NPN triode Q126 from being too high. If the voltage is too high here, it is discharged to the signal ground via the diode D119.
In an embodiment, the push-pull circuit includes a resistor R496, a resistor R500, a resistor R508, a resistor R516, a resistor R518, a PNP transistor Q128, a PNP transistor Q124, a PNP transistor Q122, and a resistor R506, wherein a base of the PNP transistor Q122 is sequentially connected to a collector of the PNP transistor Q122 through the resistor R500, the resistor R496, a collector is an output terminal of the push-pull circuit, an emitter is respectively connected to a base of the PNP transistor Q124 and one end of the resistor R506, a collector of the PNP transistor Q124 is connected to a collector of the PNP transistor Q122, an emitter is respectively connected to a collector of the PNP transistor Q128 and the other end of the resistor R506, a base of the PNP transistor Q128 is an input terminal of the push-pull circuit, an emitter is sequentially connected to a base of the PNP transistor Q122 through the resistor R518, the resistor R516, and the resistor R508, and a common terminal of the resistor R516 and the resistor R518 are also connected to the other end of the resistor R517.
It should be noted that, the push-pull circuit may also adopt other structures in the prior art for amplifying to obtain the output voltage, which is not described herein.
In one embodiment, the first configuration voltage is +50V and the second configuration voltage is-500V. Or can be adjusted according to actual requirements.
In an embodiment, the feedback circuit includes a resistor R521, a resistor R522, a capacitor C427, and a capacitor C429, two ends of the resistor R522 are respectively connected to one ends of the resistor R521 and the capacitor C427, the other end of the resistor R521 is grounded, the other end of the capacitor C427 is connected to the output end of the operational amplifier U164A, and two ends of the capacitor C429 are respectively connected to a common end of the resistor R521 and the resistor R522 and the output end of the operational amplifier U164A.
In one embodiment, the operational amplifier is selected from OP296GSZ. Or can be adjusted according to actual requirements.
Working principle:
when the voltage control circuit works, voltage control signals which can be the same or different voltage control signals are provided for each voltage control circuit through the main board, high voltage power (first configuration voltage and second configuration voltage) is provided for each voltage control circuit through the power supply module, the regulation range limitation is realized, and each voltage control circuit realizes accurate control on actual output voltage under given input voltage (namely given voltage control signals).
Specifically, the voltage control signal is input from the voltage input terminal d2_set and is negatively amplified by the operational amplifier U164A, and the voltages at the same direction input terminal and the opposite direction input terminal of the operational amplifier U164A are always kept equal due to the feedback of the negative feedback signal. At this time, NPN transistor Q126 is turned on, so that PNP transistor Q128, PNP transistor Q124, and PNP transistor Q122 all operate in the amplifying region, and the output voltage of voltage output terminal D2 is adjusted by the characteristics of the amplifying region. Outputting a voltage required by providing a corresponding lens at a voltage output end D2; meanwhile, the output voltage of the voltage output end D2 is acquired through a sampling circuit, a plurality of times of the output voltage is obtained after calculation through the operational amplifier U164B and is used as the output of the sampling signal output end D2_FB and fed back to the main board, if the input voltage control signal of the voltage input end D2_SET is 1V and the output voltage of the voltage output end D2 is 100V, the output of the sampling signal output end D2_FB is 1V after calculation, when the output voltage control signal is equal to the input voltage control signal of the voltage input end D2_SET, the main board considers that no fault occurs through comparison and analysis, and obtains accurate output voltage, if the output of the sampling signal output end D2_FB is unequal to the input voltage control signal of the voltage input end D2_SET, the fault is considered to occur, and the output voltage is wrong, so that the monitoring effect on the actual value of the output voltage can be realized. In the initial state, the resistor R496, the resistor R500, the resistor R508 and the resistor R516 provide bias voltages for the PNP type triode Q128, the PNP type triode Q124 and the PNP type triode Q122, and realize voltage division during operation.
According to the method, the voltage regulating circuits are connected with the lenses in the mass spectrometer in a one-to-one correspondence manner, so that the shunt control is realized to provide required voltages for the corresponding lenses, the voltage of the corresponding lenses can be changed only by simply regulating the voltage control signals provided by the main board to each voltage regulating circuit, and the voltage value of each lens can be regulated according to the voltage value requirement change in the actual use process, so that the electric field intensity is accurately controlled, and the track precision of ions in space is improved; any output in any voltage range (namely any voltage value between the first configuration voltage and the second configuration voltage can be output) can be realized through the output voltage configuration circuit, the voltage range of the output voltage is limited, the safety is improved, the amplification factor of the operational amplifier and the output voltage range can be changed for adjustment, the application range is wide, and each lens is not required to be independently provided with a corresponding power supply module to provide high voltage, so that the miniaturization and the low cost are realized; and the output voltage is fed back through the sampling circuit, whether the output voltage corresponding to the voltage regulating circuit is correct and stable is determined, the output voltage is monitored in real time, and the running stability of equipment is guaranteed.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above-described embodiments are merely representative of the more specific and detailed embodiments described herein and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (8)
1. A lens voltage shunt control circuit for a mass spectrometer, the mass spectrometer comprising an electron bombardment ionization source comprising a lens group consisting of at least one lens, characterized in that: the lens voltage shunt control circuit for the mass spectrometer comprises at least one voltage regulating circuit, wherein the voltage regulating circuit is connected with the lenses in a one-to-one correspondence manner, and comprises a first operational amplifier circuit, a protection circuit, a push-pull circuit and an output voltage configuration circuit, wherein:
the first operational amplifier circuit comprises a resistor R504, a resistor R510, an operational amplifier U164A, a capacitor C423, a capacitor C425 and a feedback circuit, wherein the positive power end of the operational amplifier U164A is connected with the positive electrode of a power supply and is grounded through the capacitor C425, the negative power end is connected with the negative electrode of the power supply and is grounded through the capacitor C423, the non-inverting input end is sequentially grounded through the resistor R504 and the resistor R510, the inverting input end is connected with the output end of the operational amplifier U164A through the feedback circuit, and the common end of the resistor R504 and the resistor R510 is used as a voltage input end for receiving a voltage control signal sent by a main board;
the input end of the protection circuit is connected with the output end of the operational amplifier U164A, and the output end of the protection circuit is connected with the input end of the push-pull circuit and is used for realizing overvoltage protection;
the output voltage configuration circuit comprises a resistor R502, a resistor R517, a resistor R494, a capacitor C421, a resistor R486 and a resistor R487, wherein one end of the resistor R517 is connected with the input end of the push-pull circuit, the other end of the resistor R517 is used for receiving a first configuration voltage, one end of the resistor R494 is connected with the output end of the push-pull circuit and is also connected with the non-inverting input end of the operational amplifier U164A through the resistor R502, the other end of the resistor R494 is grounded through the capacitor C421, the common end of the resistor R494 and the capacitor C421 is used as a voltage output end for being connected with a corresponding lens, one end of the resistor R487 is connected with the output end of the push-pull circuit, and the other end of the resistor R494 is used for receiving a second configuration voltage through the resistor R486.
2. The lens voltage shunt control circuit for a mass spectrometer of claim 1, wherein: the voltage regulating circuit further comprises a sampling circuit, the sampling circuit comprises an operational amplifier U164B, a capacitor C419, a resistor R491 and a resistor R498, the output end of the operational amplifier U164B is used for feeding back sampling signals to a main board, the non-inverting input end is grounded, the inverting input end is connected with the output end of the operational amplifier U164B through the capacitor C419 and the resistor R491 which are connected in parallel, the inverting input end is also connected with one end of the resistor R498, and the other end of the resistor R498 is connected with the common end of the resistor R502 and the resistor R494.
3. The lens voltage shunt control circuit for a mass spectrometer of claim 2, wherein: the output voltage configuration circuit further comprises a resistor R492 and a resistor R493, wherein the resistor R492 and the resistor R493 are connected in series between the resistor R498 and the resistor R494.
4. The lens voltage shunt control circuit for a mass spectrometer of claim 1, wherein: the protection circuit comprises a resistor R512, a diode D119 and an NPN triode Q126, wherein two ends of the resistor R512 are respectively connected with the output end of the operational amplifier U164A and the positive electrode of the diode D119, the negative electrode of the diode D119 is grounded, the base electrode of the NPN triode Q126 is connected with the negative electrode of the diode D119, the emitter electrode is connected with the positive electrode of the diode D119, and the collector electrode is connected with the input end of the push-pull circuit.
5. The lens voltage shunt control circuit for a mass spectrometer of claim 1, wherein: the push-pull circuit comprises a resistor R496, a resistor R500, a resistor R508, a resistor R516, a resistor R518, a PNP triode Q128, a PNP triode Q124, a PNP triode Q122 and a resistor R506, wherein the base electrode of the PNP triode Q122 is sequentially connected with the collector electrode of the PNP triode Q122 through the resistor R500, the resistor R496, the collector electrode is used as the output end of the push-pull circuit, the emitter electrode is respectively connected with the base electrode of the PNP triode Q124 and one end of the resistor R506, the collector electrode of the PNP triode Q124 is connected with the collector electrode of the PNP triode Q122, the emitter electrode is respectively connected with the collector electrode of the PNP triode Q128 and the other end of the resistor R506, the base electrode of the PNP triode Q128 is used as the input end of the push-pull circuit, the emitter electrode sequentially passes through the resistor R518, the resistor R516 and the resistor R508 and the base electrode of the PNP triode Q122, and the public end of the resistor R516 and the resistor R518 are also connected with the other end of the resistor R517.
6. The lens voltage shunt control circuit for a mass spectrometer of claim 1, wherein: the first configuration voltage is +50V, and the second configuration voltage is-500V.
7. The lens voltage shunt control circuit for a mass spectrometer of claim 1, wherein: the feedback circuit comprises a resistor R521, a resistor R522, a capacitor C427 and a capacitor C429, wherein two ends of the resistor R522 are respectively connected with one ends of the resistor R521 and the capacitor C427, the other end of the resistor R521 is grounded, the other end of the capacitor C427 is connected with the output end of the operational amplifier U164A, and two ends of the capacitor C429 are respectively connected with the common end of the resistor R521 and the resistor R522 and the output end of the operational amplifier U164A.
8. The lens voltage shunt control circuit for a mass spectrometer of claim 1, wherein: the selection type of each operational amplifier is OP296GSZ.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320701618.5U CN219435808U (en) | 2023-03-28 | 2023-03-28 | Lens voltage shunt control circuit for mass spectrometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320701618.5U CN219435808U (en) | 2023-03-28 | 2023-03-28 | Lens voltage shunt control circuit for mass spectrometer |
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| CN219435808U true CN219435808U (en) | 2023-07-28 |
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| CN202320701618.5U Active CN219435808U (en) | 2023-03-28 | 2023-03-28 | Lens voltage shunt control circuit for mass spectrometer |
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- 2023-03-28 CN CN202320701618.5U patent/CN219435808U/en active Active
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