CN211123229U - High-frequency anti-interference filtering device of nuclear magnetic resonance spectrometer - Google Patents
High-frequency anti-interference filtering device of nuclear magnetic resonance spectrometer Download PDFInfo
- Publication number
- CN211123229U CN211123229U CN201921795940.9U CN201921795940U CN211123229U CN 211123229 U CN211123229 U CN 211123229U CN 201921795940 U CN201921795940 U CN 201921795940U CN 211123229 U CN211123229 U CN 211123229U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- filter
- ground wire
- operational amplifier
- voltage stabilizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a nuclear magnetic resonance appearance's anti-interference filter of high frequency device belongs to the electron technical field, including 24V voltage regulator module, first order filter circuit, low power switch voltage stabilizing circuit, second order high frequency filter circuit, 5V stabiliser IC1, 3.3V stabiliser IC2 and third-order high frequency filter circuit, solved the technical problem that provides the low power switch power supply that has anti high frequency interference for nuclear magnetic resonance spectrometer's sampling circuit, the utility model discloses a low power switch power supply carries out secondary step-down steady voltage for 24V power module, and its wait current is low, and self is efficient, the life-span of the battery in the extension UPS power that can be fine, the utility model discloses a multistage high frequency filter capacitor network, fundamentally has eliminated the high frequency interference signal of L ED lamp high frequency interference source in the power supply line of coming into, very big improvement the sampling degree of accuracy of nuclear magnetic resonance spectrometer's sampling circuit.
Description
Technical Field
The utility model belongs to the technical field of the electron, especially, relate to a high frequency anti interference filter of nuclear magnetic resonance appearance.
Background
Nuclear Magnetic Resonance (MRI) is an imaging technology for reconstructing an image by collecting signals generated by a magnetic resonance phenomenon, and therefore, is also called spin tomography, magnetic resonance CT, and MRI, which can visualize lesions that cannot be displayed by CT, and is a further important development in the field of medical imaging, and is a new technology for clinical image diagnosis applied in the early 80 s.
In order to obtain a better measuring effect, a nuclear magnetic resonance spectrometer and an imager both need to use several to dozens of preamplifiers to realize the purpose of detecting or receiving multiple atomic nuclei in parallel, all the preamplifiers need to work in a unified and coordinated manner, circuit signals are extremely easy to interfere due to more amplifiers, particularly L ED illuminating lamp and mobile phone signals adopted at present are controlled by PWM (pulse width modulation) basically adopted by L ED illuminating lamps, control signals of the L ED illuminating lamps can be connected with high-frequency interference sources in series in a power supply circuit, the mobile phones can also generate high-frequency interference radiation sources above 900Mhz in space, and the high-frequency interference sources act in the power supply circuit to generate adverse effects on sampling circuits of the nuclear magnetic resonance spectrometer and the imager.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a nuclear magnetic resonance appearance's high frequency anti interference filter has solved the technical problem who provides the low-power switching power supply that has anti high frequency interference for nuclear magnetic resonance spectrometer's sampling circuit.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-frequency anti-interference filter device of a nuclear magnetic resonance apparatus comprises a 24V voltage stabilizing module, a first-order filter circuit, a low-power switch voltage stabilizing circuit and a second-order high-frequency filter circuit, the low-power-supply-type three-level voltage stabilizer comprises a 5V voltage stabilizer IC1, a 3.3V voltage stabilizer IC2 and a three-order high-frequency filter circuit, wherein the input end of a 24V voltage stabilizer module is connected with 220V mains supply, the output end of the 24V voltage stabilizer module outputs a 24V power supply, the 24V power supply is filtered by a first-order filter circuit and supplies power to a low-power switching voltage stabilizing circuit, the output end of the low-power switching voltage stabilizing circuit outputs an 8.2V power supply, the input end of a 5V voltage stabilizer IC1 and the input end of a 3.3V voltage stabilizer IC2 are both connected with an 8.2V power supply, the input end of a 5V voltage stabilizer IC1 and the input end of a 3.3V voltage stabilizer IC2 are filtered by a second-order high-frequency filter circuit, the output end of a 5V voltage stabilizer IC 7 and the output end of a 3.3V;
the ground wire output by the 24V voltage stabilizing module is a first ground wire;
the low-power switch voltage stabilizing circuit comprises a triode A, a resistor R, an operational amplifier IC, a diode D, an inductor 8, a capacitor C and a capacitor C, wherein a base electrode and a collector electrode of the triode A are both connected with a 24V power supply, an emitting electrode of the triode A is connected with a first ground wire through the resistor R, a collector electrode of the triode A is connected with a 24V power supply through the resistor R, the emitting electrode is connected with a first ground wire through the resistor R, a pin 2 of the operational amplifier IC is connected with an emitting electrode of the triode A, a pin 3 of the operational amplifier IC through the resistor R, a pin 6 of the operational amplifier IC is further connected with the base electrode of the triode A through the resistor R, the emitting electrode of the triode A is connected with the 24V power supply, a collector electrode is connected with a pin 1 of the inductor 8, a pin 2 of the inductor 8 is connected with a pin 3 of the operational amplifier IC through the resistor R, a pin 1 of the diode D is connected with a pin 2 of the inductor 8, a pin 2 of the operational amplifier IC, a negative electrode of the operational amplifier IC is connected with a negative electrode of the first ground wire, a negative electrode of the inductor C, a negative electrode of the operational amplifier IC is connected with a negative electrode of the operational amplifier IC, a negative electrode of the operational amplifier IC;
the first-order filter circuit, the second-order high-frequency filter circuit and the third-order high-frequency filter circuit are all high-frequency filter capacitor network circuits.
Preferably, the 24V voltage stabilizing module includes an AC-DC module IC3, the first-order filter circuit includes a capacitor C1, a capacitor C2 and a capacitor C3, the capacitor C1, the capacitor C2 and the capacitor C3 are filter capacitor networks connected in parallel, the output terminal of the AC-DC module IC3 is filtered by the filter capacitor network formed by the capacitor C1, the capacitor C2 and the capacitor C3, and the capacitor C1 and the capacitor C3 are capacitors of 0.1uF and 22P, respectively.
Preferably, the model of the AC-DC module IC3 is HS24P36 SR.
Preferably, the first-order filter circuit includes a capacitor C1, a capacitor C2 and a capacitor C3, the capacitor C1, the capacitor C2 and the capacitor C3 are connected in parallel to form a filter capacitor network of the output terminal of the 24V voltage stabilizing module, the second-order high-frequency filter circuit includes a capacitor C9, a capacitor C10, a diode D15, a capacitor C11, a capacitor C13, a capacitor C15, a capacitor C17, a diode D17, a capacitor C17 and a capacitor C17, the capacitor C17 and the capacitor C17 are connected in parallel to form a high-frequency filter capacitor network of the output terminal of the low power switch voltage stabilizing circuit, the anode of the diode D17 is connected to the output terminal of the low power switch voltage stabilizing circuit, the cathode of the diode D17 is connected to the input terminal of the 5V IC voltage stabilizing circuit 17, the capacitors C17 and the capacitors C17 are connected in parallel to form a filter capacitor network of the input terminal of the 5, The negative electrode of the 3.3V voltage stabilizer IC2 is connected with the input end of the 3.3V voltage stabilizer IC2, and a filter capacitor network of the input end of the 3.3V voltage stabilizer IC2 is formed after the capacitor C12, the capacitor C14, the capacitor C16 and the capacitor C18 are connected in parallel;
the three-order high-frequency filter circuit comprises a capacitor C19, a capacitor C21, a capacitor C23, a capacitor C25, a capacitor C20, a capacitor C22, a capacitor C24 and a capacitor C26, wherein the capacitor C19, the capacitor C21, the capacitor C23 and the capacitor C25 are connected in parallel to form a filter capacitor network of the output end of the 5V voltage stabilizer IC1, and the capacitor C20, the capacitor C22, the capacitor C24 and the capacitor C26 are connected in parallel to form a filter capacitor network of the output end of the 3.3V voltage stabilizer IC 2.
Preferably, the capacitor C11, the capacitor C23, the capacitor C12 and the capacitor C24 are all 30P capacitors, the capacitor C13, the capacitor C25, the capacitor C14 and the capacitor C26 are all 22P capacitors, and the capacitor C17, the capacitor C19, the capacitor C18 and the capacitor C20 are all 0.1uF capacitors.
Preferably, the ground wire provided by the 5V voltage regulator IC1 is a second ground wire, the ground wire provided by the 3.3V voltage regulator IC2 is a third ground wire, the first ground wire is connected with the second ground wire through a magnetic bead R34, and the second ground wire is connected with the third ground wire through a magnetic bead R14.
Preferably, the model of the operational amplifier IC4 is uA735C, the model of the operational amplifier IC5 is UC4250C, the model of the 5V regulator IC1 is L M7805, and the model of the 3.3V regulator IC2 is AMS 1117-3.3V.
A nuclear magnetic resonance appearance's high frequency anti interference filter device, solved and provide the technical problem that has anti high frequency interference's low power switching power supply for nuclear magnetic resonance spectrometer's sampling circuit, the utility model discloses a low power switching power supply carries out secondary step-down steady voltage for 24V power module, and its standby current is low, and self is efficient, the life-span of the battery in the extension UPS power that can be fine, the utility model discloses a multistage high frequency filter capacitance network, fundamentally has eliminated high frequency interference source such as L ED lamp and has gone into the high frequency interference signal in the power supply line, very big improvement nuclear magnetic resonance spectrometer's sampling circuit's the sampling degree of accuracy.
Drawings
Fig. 1 is a block diagram of the circuit diagram of the present invention;
fig. 2 is a circuit diagram of the 24V regulator module of the present invention;
fig. 3 is a circuit diagram of the present invention.
Detailed Description
The high-frequency anti-interference filter device of the nuclear magnetic resonance instrument shown in fig. 1-3 comprises a 24V voltage stabilizing module, a first-order filter circuit, a low-power switching voltage stabilizing circuit, a second-order high-frequency filter circuit, a 5V voltage stabilizer IC1, a 3.3V voltage stabilizer IC2 and a third-order high-frequency filter circuit, wherein the input end of the 24V voltage stabilizing module is connected with 220V commercial power, the output end of the 24V voltage stabilizing module outputs 24V power, the 24V power is filtered by the first-order filter circuit and supplies power to the low-power switching voltage stabilizing circuit, the output end of the low-power switching voltage stabilizing circuit outputs 8.2V power, the input end of the 5V voltage stabilizer IC1 and the input end of the 3.3V voltage stabilizer IC2 are both connected with 8.2V power, the second-order high-frequency filter circuit filters the input end of the 5V voltage stabilizer IC1 and the input end of the 3.3V voltage stabilizer IC2, the 5V voltage stabilizer IC1 and the 3.3V voltage stabilizer IC2 respectively output a 5V power supply and a 3.3V power supply;
the 5V power supply and the 3.3V power supply provide 5V power supply and 3.3V power supply for a sampling circuit of the nuclear magnetic resonance spectrometer, and the nuclear magnetic resonance spectrometer is suitable for most nuclear magnetic resonance spectrometers in the current market.
The ground wire output by the 24V voltage stabilizing module is a first ground wire;
the low-power switch voltage stabilizing circuit comprises a triode A, a resistor R, an operational amplifier IC, a diode D, an inductor 8, a capacitor C and a capacitor C, wherein a base electrode and a collector electrode of the triode A are both connected with a 24V power supply, an emitting electrode of the triode A is connected with a first ground wire through the resistor R, a collector electrode of the triode A is connected with a 24V power supply through the resistor R, the emitting electrode is connected with a first ground wire through the resistor R, a pin 2 of the operational amplifier IC is connected with an emitting electrode of the triode A, a pin 3 of the operational amplifier IC through the resistor R, a pin 6 of the operational amplifier IC is further connected with the base electrode of the triode A through the resistor R, the emitting electrode of the triode A is connected with the 24V power supply, a collector electrode is connected with a pin 1 of the inductor 8, a pin 2 of the inductor 8 is connected with a pin 3 of the operational amplifier IC through the resistor R, a pin 1 of the diode D is connected with a pin 2 of the inductor 8, a pin 2 of the operational amplifier IC, a negative electrode of the operational amplifier IC is connected with a negative electrode of the first ground wire, a negative electrode of the inductor C, a negative electrode of the operational amplifier IC is connected with a negative electrode of the operational amplifier IC, a negative electrode of the operational amplifier IC;
at present, the sampling circuit of the nuclear magnetic resonance spectrometer mostly adopts 5V power supply or 3.3V power supply, and the embodiment adopts that the 220V commercial power is firstly reduced in voltage through the AC-DC module of 24V output, and then secondary voltage reduction is carried out through the low-power switch voltage stabilizing circuit, so that the threshold voltage of the input ends of the 5V voltage stabilizing module and the 3.3V voltage stabilizing module in the later stage is greatly reduced, the cost of the voltage stabilizer is reduced, and the efficiency of the power supply circuit is improved.
The utility model discloses a low-power switch voltage stabilizing circuit's standby current only 90uA, its output is 8.2V, has greatly improved the work efficiency of later stage constant voltage power supply module, and its self efficiency is 70%.
As shown in FIG. 2, the low power switching regulator circuit is an operational amplifier IC4 with a type of uA735C, and in practical application, a capacitor may be connected in series between pins 5 and 8 of the operational amplifier IC4, so as to further increase switching speed and reduce power consumption.
The operational amplifier IC5 is UC4250C, and can output two voltages, i.e. positive and negative voltages, and only the positive voltage output by the operational amplifier IC is used in this embodiment.
The transistor a4 is 2N2907, the transistor a5 is 2N2604, the transistor a6 is 2N2604, the base-emitter junction of the transistor a4 is reverse biased, which is equivalent to a stable low current zener diode, the transistor a5 forms a constant current source, the output voltage of which is determined by the resistance of the resistor R3, and the inductor L8 is an output inductor.
The first-order filter circuit, the second-order high-frequency filter circuit and the third-order high-frequency filter circuit are all high-frequency filter capacitor network circuits.
Preferably, the first-order filter circuit includes a capacitor C1, a capacitor C2 and a capacitor C3, the capacitor C1, the capacitor C2 and the capacitor C3 are connected in parallel to form a filter capacitor network of the output terminal of the 24V voltage stabilizing module, the second-order high-frequency filter circuit includes a capacitor C9, a capacitor C10, a diode D15, a capacitor C11, a capacitor C13, a capacitor C15, a capacitor C17, a diode D17, a capacitor C17 and a capacitor C17, the capacitor C17 and the capacitor C17 are connected in parallel to form a high-frequency filter capacitor network of the output terminal of the low power switch voltage stabilizing circuit, the anode of the diode D17 is connected to the output terminal of the low power switch voltage stabilizing circuit, the cathode of the diode D17 is connected to the input terminal of the 5V IC voltage stabilizing circuit 17, the capacitors C17 and the capacitors C17 are connected in parallel to form a filter capacitor network of the input terminal of the 5, The negative electrode of the 3.3V voltage stabilizer IC2 is connected with the input end of the 3.3V voltage stabilizer IC2, and a filter capacitor network of the input end of the 3.3V voltage stabilizer IC2 is formed after the capacitor C12, the capacitor C14, the capacitor C16 and the capacitor C18 are connected in parallel;
the three-order high-frequency filter circuit comprises a capacitor C19, a capacitor C21, a capacitor C23, a capacitor C25, a capacitor C20, a capacitor C22, a capacitor C24 and a capacitor C26, wherein the capacitor C19, the capacitor C21, the capacitor C23 and the capacitor C25 are connected in parallel to form a filter capacitor network of the output end of the 5V voltage stabilizer IC1, and the capacitor C20, the capacitor C22, the capacitor C24 and the capacitor C26 are connected in parallel to form a filter capacitor network of the output end of the 3.3V voltage stabilizer IC 2.
Preferably, the capacitor C11, the capacitor C23, the capacitor C12 and the capacitor C24 are all 30P capacitors, the capacitor C13, the capacitor C25, the capacitor C14 and the capacitor C26 are all 22P capacitors, and the capacitor C17, the capacitor C19, the capacitor C18 and the capacitor C20 are all 0.1uF capacitors.
The utility model discloses a high frequency interference signal that 0.1uF electric capacity is gone into to the cluster in the power supply line filters, if, the PWM high frequency interference signal that L ED lamp produced to adopt 22P electric capacity and 30P electric capacity to filter the space 900MHz that the cell-phone produced and above high frequency interference signal, guaranteed the purity of later stage 5V power and 3.3V power, improved the purity of the sampling circuit's of nuclear magnetic resonance spectrometer power supply, improved the degree of accuracy of sampling signal.
When the PCB is processed, the first-order filter circuit is close to the output end of the 24V voltage stabilizing module IC3 and is used for filtering a 24V power supply at the output end of the 24V voltage stabilizing module IC3, wherein the capacitor C1 adopts a 22P capacitor and is used for filtering high-frequency interference signals generated by a mobile phone, and the capacitor C2 adopts a 0.1uF capacitor and is used for filtering high-frequency interference signals generated by other electric appliances transmitted in a power supply line, such as L ED lamps and other electric appliances.
In the second-order high-frequency filter circuit, a capacitor C9 and a capacitor C10 should be close to the output end of the low-power switching voltage stabilizing circuit, a capacitor C11, a capacitor C13, a capacitor C15 and a capacitor C17 should be close to the input end of a 5V voltage regulator IC1, and a capacitor C12, a capacitor C14, a capacitor C16 and a capacitor C18 should be close to the input end of a 3.3V voltage regulator IC 2.
In the third-order high-frequency filter circuit, the capacitor C19, the capacitor C21, the capacitor C23 and the capacitor C25 should be close to the output end of the 5V voltage regulator IC1, and the capacitor C20, the capacitor C22, the capacitor C24 and the capacitor C26 should be close to the output end of the 3.3V voltage regulator IC 1.
Preferably, the 24V voltage stabilizing module includes an AC-DC module IC3, the first-order filter circuit includes a capacitor C1, a capacitor C2 and a capacitor C3, the capacitor C1, the capacitor C2 and the capacitor C3 are filter capacitor networks connected in parallel, the output terminal of the AC-DC module IC3 is filtered by the filter capacitor network formed by the capacitor C1, the capacitor C2 and the capacitor C3, and the capacitor C1 and the capacitor C3 are capacitors of 0.1uF and 22P, respectively.
Preferably, the model of the AC-DC module IC3 is HS24P36 SR.
Preferably, the ground wire provided by the 5V voltage regulator IC1 is a second ground wire, the ground wire provided by the 3.3V voltage regulator IC2 is a third ground wire, the first ground wire is connected with the second ground wire through a magnetic bead R34, and the second ground wire is connected with the third ground wire through a magnetic bead R14.
The utility model discloses fall into the ground wire threely, first ground wire is provided by 24V voltage stabilizing module IC3, and the second ground wire is provided by 5V stabiliser IC1, and the third ground wire is provided by 3.3V stabiliser IC2 to adopt the magnetic bead to keep apart each ground wire, very big reduction the interference between the power ground wire and gone into, improved each power output voltage's stability.
Preferably, the model of the operational amplifier IC4 is uA735C, the model of the operational amplifier IC5 is UC4250C, the model of the 5V regulator IC1 is L M7805, and the model of the 3.3V regulator IC2 is AMS 1117-3.3V.
A nuclear magnetic resonance appearance's high frequency anti interference filter device, solved and provide the technical problem that has anti high frequency interference's low power switching power supply for nuclear magnetic resonance spectrometer's sampling circuit, the utility model discloses a low power switching power supply carries out secondary step-down steady voltage for 24V power module, and its standby current is low, and self is efficient, the life-span of the battery in the extension UPS power that can be fine, the utility model discloses a multistage high frequency filter capacitance network, fundamentally has eliminated high frequency interference source such as L ED lamp and has gone into the high frequency interference signal in the power supply line, very big improvement nuclear magnetic resonance spectrometer's sampling circuit's the sampling degree of accuracy.
Claims (7)
1. The high-frequency anti-interference filter device of the nuclear magnetic resonance spectrometer is characterized in that: comprises a 24V voltage stabilizing module, a first-order filter circuit, a low-power switch voltage stabilizing circuit, a second-order high-frequency filter circuit, a 5V voltage stabilizer IC1, a 3.3V voltage stabilizer IC2 and a third-order high-frequency filter circuit, the input end of the 24V voltage stabilizing module is connected with 220V mains supply, the output end of the 24V voltage stabilizing module outputs a 24V power supply, the 24V power supply is filtered by the first-order filter circuit to supply power to the low-power switching voltage stabilizing circuit, the output end of the low-power switching voltage stabilizing circuit outputs 8.2V power supply, the input end of the 5V voltage stabilizer IC1 and the input end of the 3.3V voltage stabilizer IC2 are both connected with 8.2V power supply, the second-order high-frequency filter circuit is filtering the input end of the 5V voltage stabilizer IC1 and the input end of the 3.3V voltage stabilizer IC2, the output end of the 5V voltage stabilizer IC1 and the output end of the 3.3V voltage stabilizer IC2 are both connected with a third-order high-frequency filter circuit, and the 5V voltage stabilizer IC;
the ground wire output by the 24V voltage stabilizing module is a first ground wire;
the low-power switch voltage stabilizing circuit comprises a triode A, a resistor R, an operational amplifier IC, a diode D, an inductor 8, a capacitor C and a capacitor C, wherein a base electrode and a collector electrode of the triode A are both connected with a 24V power supply, an emitting electrode of the triode A is connected with a first ground wire through the resistor R, a collector electrode of the triode A is connected with a 24V power supply through the resistor R, the emitting electrode is connected with a first ground wire through the resistor R, a pin 2 of the operational amplifier IC is connected with an emitting electrode of the triode A, a pin 3 of the operational amplifier IC through the resistor R, a pin 6 of the operational amplifier IC is further connected with the base electrode of the triode A through the resistor R, the emitting electrode of the triode A is connected with the 24V power supply, a collector electrode is connected with a pin 1 of the inductor 8, a pin 2 of the inductor 8 is connected with a pin 3 of the operational amplifier IC through the resistor R, a pin 1 of the diode D is connected with a pin 2 of the inductor 8, a pin 2 of the operational amplifier IC, a negative electrode of the operational amplifier IC is connected with a negative electrode of the first ground wire, a negative electrode of the inductor C, a negative electrode of the operational amplifier IC is connected with a negative electrode of the operational amplifier IC, a negative electrode of the operational amplifier IC;
the first-order filter circuit, the second-order high-frequency filter circuit and the third-order high-frequency filter circuit are all high-frequency filter capacitor network circuits.
2. The apparatus of claim 1, wherein the high frequency antijam filter of the nuclear magnetic resonance apparatus comprises: the 24V voltage stabilizing module comprises an AC-DC module IC3, the first-order filter circuit comprises a capacitor C1, a capacitor C2 and a capacitor C3, the capacitor C1, the capacitor C2 and the capacitor C3 are filter capacitor networks connected in parallel, the output end of the AC-DC module IC3 is filtered through the filter capacitor network formed by the capacitor C1, the capacitor C2 and the capacitor C3, and the capacitor C1 and the capacitor C3 are capacitors of 0.1uF and 22P respectively.
3. The apparatus of claim 2, wherein the high frequency antijam filter of the nuclear magnetic resonance apparatus comprises: the model of the AC-DC module IC3 is HS24P36 SR.
4. The apparatus of claim 1, wherein the high frequency antijam filter of the nuclear magnetic resonance apparatus comprises: the first-order filter circuit comprises a capacitor C1, a capacitor C2 and a capacitor C3, the capacitor C1, the capacitor C2 and the capacitor C3 are connected in parallel to form a filter capacitor network of the output end of the 24V voltage stabilizing module, the second-order high-frequency filter circuit comprises a capacitor C9, a capacitor C10, a diode D15, a capacitor C11, a capacitor C13, a capacitor C15, a capacitor C17, a diode D17, a capacitor C17 and a capacitor C17, the capacitor C17 and the capacitor C17 are connected in parallel to form a high-frequency filter capacitor network of the output end of the low-power switch voltage stabilizing circuit, the anode of the diode D17 is connected with the output end of the low-power switch voltage stabilizing circuit, the cathode of the diode D17 is connected with the input end of the 5V IC 17, the capacitor C17 and the capacitor C17 are connected in parallel to, The negative electrode of the 3.3V voltage stabilizer IC2 is connected with the input end of the 3.3V voltage stabilizer IC2, and a filter capacitor network of the input end of the 3.3V voltage stabilizer IC2 is formed after the capacitor C12, the capacitor C14, the capacitor C16 and the capacitor C18 are connected in parallel;
the three-order high-frequency filter circuit comprises a capacitor C19, a capacitor C21, a capacitor C23, a capacitor C25, a capacitor C20, a capacitor C22, a capacitor C24 and a capacitor C26, wherein the capacitor C19, the capacitor C21, the capacitor C23 and the capacitor C25 are connected in parallel to form a filter capacitor network of the output end of the 5V voltage stabilizer IC1, and the capacitor C20, the capacitor C22, the capacitor C24 and the capacitor C26 are connected in parallel to form a filter capacitor network of the output end of the 3.3V voltage stabilizer IC 2.
5. The apparatus of claim 4, wherein the high frequency anti-interference filter comprises: the capacitor C11, the capacitor C23, the capacitor C12 and the capacitor C24 are all 30P capacitors, the capacitor C13, the capacitor C25, the capacitor C14 and the capacitor C26 are all 22P capacitors, and the capacitor C17, the capacitor C19, the capacitor C18 and the capacitor C20 are all 0.1uF capacitors.
6. The apparatus of claim 1, wherein the high frequency antijam filter of the nuclear magnetic resonance apparatus comprises: the ground wire that 5V stabiliser IC1 provided is the second ground wire, the ground wire that 3.3V stabiliser IC2 provided is the third ground wire, first ground wire with connect through magnetic bead R34 between the second ground wire, the second ground wire with connect through magnetic bead R14 between the third ground wire.
7. The high-frequency anti-interference filter device for the nuclear magnetic resonance spectrometer as claimed in claim 1, wherein the model of the operational amplifier IC4 is uA735C, the model of the operational amplifier IC5 is UC4250C, the model of the 5V voltage stabilizer IC1 is L M7805, and the model of the 3.3V voltage stabilizer IC2 is AMS 1117-3.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921795940.9U CN211123229U (en) | 2019-10-24 | 2019-10-24 | High-frequency anti-interference filtering device of nuclear magnetic resonance spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921795940.9U CN211123229U (en) | 2019-10-24 | 2019-10-24 | High-frequency anti-interference filtering device of nuclear magnetic resonance spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211123229U true CN211123229U (en) | 2020-07-28 |
Family
ID=71688429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921795940.9U Active CN211123229U (en) | 2019-10-24 | 2019-10-24 | High-frequency anti-interference filtering device of nuclear magnetic resonance spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211123229U (en) |
-
2019
- 2019-10-24 CN CN201921795940.9U patent/CN211123229U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109871059A (en) | A kind of ultra low voltage LDO circuit | |
| CN211123229U (en) | High-frequency anti-interference filtering device of nuclear magnetic resonance spectrometer | |
| CN110165921A (en) | One kind having the quasi- Z-source inverter of high output voltage gain switch inductive type | |
| CN112332652B (en) | Bridgeless power factor correction circuit based on resonant switch capacitor converter | |
| CN205232038U (en) | Variable frequency power supply circuit and TV set | |
| WO2018129835A1 (en) | Vienna pfc-based smart half bridge sine wave voltage conversion circuit | |
| CN208029142U (en) | The high-power multistage regulating current device of one kind and flicker free LED light lighting system | |
| CN212162856U (en) | Power control circuit and wearable electronic equipment | |
| CN206517138U (en) | Power supply circuit of single-phase intelligent electric meter | |
| CN212367135U (en) | LLC resonant converter control circuit and direct current charging module | |
| CN102170540B (en) | Input power supply voltage sampling and shutdown capacitance discharging circuit | |
| CN205901578U (en) | Wave filter with coupling inductance | |
| CN112234850B (en) | Power supply device, circuit control method and power supply system | |
| CN209072145U (en) | The switching circuit of power standby and normal work | |
| CN209881443U (en) | Solar charging circuit and charger | |
| CN210225835U (en) | High-power solar lamp control circuit based on microwave human body induction | |
| CN203554743U (en) | LED drive circuit | |
| CN205811852U (en) | Frequency-conversion constant-current BUCK circuit | |
| CN204045189U (en) | Small size color screen backlight control circuit | |
| CN202940726U (en) | Common-mode current suppression circuit | |
| CN203039967U (en) | Split LED lamp and split LED lamp driving power supply insertion and extraction protection circuit | |
| CN212909348U (en) | Feedback circuit used in power supply voltage reduction chip | |
| CN111555604A (en) | Novel quasi-single-stage high power factor circuit | |
| CN108964461A (en) | Dynamic voltage adjustment device and method | |
| CN110138039A (en) | A kind of solar charging circuit and charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |