CN207460116U - A kind of blood pressure second order high-pass filtering amplifying circuit - Google Patents
A kind of blood pressure second order high-pass filtering amplifying circuit Download PDFInfo
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- CN207460116U CN207460116U CN201721436793.7U CN201721436793U CN207460116U CN 207460116 U CN207460116 U CN 207460116U CN 201721436793 U CN201721436793 U CN 201721436793U CN 207460116 U CN207460116 U CN 207460116U
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Abstract
The utility model is related to a kind of blood pressure second order high-pass filtering amplifying circuit, feature is to include power supply input circuit, blood pressure sensor, second order high-pass filtering circuit, level-one operational amplification circuit, second-order low-pass filter circuit, sampling end.The utility model is by using second order high-pass filtering circuit, make blood pressure sensor acquisition from after carrying out level-one amplification in the fluctuating signal of human body, the filtering to direct current signal can be carried out by second order high-pass filtering circuit, the utility model is enable effectively to block direct current signal, order to level-one operational amplification circuit is only amplified AC signal again through second-order low-pass filter circuit output.The utility model has and can be effectively blocked direct current signal, improves the quality of AC signal, convenient for identification of the upper computer software to signal, the characteristics of state of an illness of medical staff is facilitated to be analyzed.
Description
Technical field
The utility model is related to medical instrument control circuit technical field, particularly a kind of blood pressure second order high-pass filtering amplification
Circuit.
Background technology
After existing blood pressure recorder pressurizes to cuff, carried out by blood pressure sensor acquisition from the fluctuating signal in human body
Level-one is amplified, because blood pressure sensor collects direct current signal and AC signal simultaneously, for the ease of analysis, it is therefore necessary to right
The signal that blood pressure sensor collects is filtered.Single order high-pass filter electricity is usually used in existing blood pressure amplifying circuit
What road was filtered, due to single order circuit of high pass filter its own there are the characteristics of, blood pressure sensor is gathered out straight
It is poor to flow signal path filtration result, it is impossible to effectively block direct current signal, so as to influence the amplification factor of communication channel, make
It is difficult into after amplifying circuit enters upper computer software, is unfavorable for analysis of the medical staff to conditions of patients；Therefore urgently
Existing blood pressure amplifying circuit need to be improved.
Utility model content
The purpose of this utility model is to provide a kind of blood pressure second order high-pass filtering amplifying circuit, blood pressure second order high pass filters
Ripple amplifying circuit improves the quality of AC signal, convenient for upper computer software to signal with that can be effectively blocked direct current signal
The advantages of identifying, the state of an illness of medical staff facilitated to be analyzed.
What the technical solution of the utility model was realized in：A kind of blood pressure second order high-pass filtering amplifying circuit, feature
It is to include power supply input circuit, blood pressure sensor, second order high-pass filtering circuit, level-one operational amplification circuit, step low-pass filter
Wave circuit, sampling end, wherein：
The second order high-pass filtering circuit includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, capacitance C1, electricity
Hold C2, operational amplifier A 2_3A, point A in parallel,
One end of the resistance R1 is turned on blood pressure sensor, and the other end of resistance R1 is turned on one end of capacitance C1, institute
The other end for stating capacitance C1 is turned on parallel connection point A；
One end of the resistance R2 is turned on parallel connection point A, and the other end of resistance R2 is turned on one end of resistance R3, described
The other end of resistance R3 is turned on the reverse input end of operational amplifier A 2_3A；
One end of the capacitance C2 is turned on parallel connection point A, and the other end of capacitance C2 is same mutually defeated with operational amplifier A 2_3A's
Enter end conducting；
One end of the resistance R4 is turned on the in-phase input end of operational amplifier A 2_3A, the other end ground connection of resistance R4；
One end of the resistance R5 is turned on the in-phase input end of operational amplifier A 2_3A, the other end ground connection of resistance R5；
The model OPA2336U of the operational amplifier A 2_3A, the positive electricity source connection of operational amplifier A 2_3A with
The power output end C conductings that power supply input circuit is equipped with, negative electricity source connection and the ground connection of operational amplifier A 2_3A, computing are put
The output terminal of big device A2_3A is turned on the reverse input end of operational amplifier A 2_3A；
The level-one operational amplification circuit includes resistance R6, resistance R7, resistance R8, operational amplifier A 2_3B, capacitance C3,
One end of the resistance R6 is turned on the output terminal of operational amplifier A 2_3A in second order high-pass filtering circuit, and resistance R6's is another
End is turned on the in-phase input end of operational amplifier A 2_3B, the model OPA2336 of the operational amplifier A 2_3B；
One end of the resistance R7 is turned on the inverting input of operational amplifier A 2_3B, the other end ground connection of resistance R7；
One end of the capacitance C3 is turned on the inverting input of operational amplifier A 2_3B, one end of capacitance C3 and computing
The output terminal conducting of amplifier A2_3B；
One end of the resistance R8 is turned on the inverting input of operational amplifier A 2_3B, the other end and fortune of resistance R8
Calculate the output terminal conducting of amplifier A2_3B；
The second-order low-pass filter circuit includes resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, capacitance
C4, capacitance C5, capacitance C11, capacitance C12, operational amplifier A 2_4B, point B in parallel, the model of the operational amplifier A 2_4B
OPA2336, one end of the resistance R9 are turned on the output terminal of the operational amplifier A 2_3B in level-one operational amplification circuit, electricity
The other end of resistance R9 is turned on parallel connection point B；
One end of the resistance R10 is turned on with parallel connection point B, and the other end of resistance R10 is same with operational amplifier A 2_4B's
Phase input terminal turns on；
One end of the capacitance C11 is turned on parallel connection point B, the other end of capacitance C11 and the output of operational amplifier A 2_4B
End conducting；
One end of the capacitance C12 is turned on parallel connection point B, the other end of capacitance C12 and the output of operational amplifier A 2_4B
End conducting；
One end of the capacitance C4 is turned on the in-phase input end of operational amplifier A 2_4B, the other end ground connection of capacitance C4；
One end ground connection of the resistance R13, the other end of resistance R13 are turned on the output terminal of operational amplifier A 2_4B；
One end of the capacitance C5 is turned on the inverting input of operational amplifier A 2_4B, the other end and fortune of capacitance C5
Calculate the output terminal conducting of amplifier A2_4B；
One end of the resistance R11 is turned on the inverting input of operational amplifier A 2_4B, the other end of resistance R11 with
One end conducting of resistance R12, the other end of the resistance R12 are turned on the output terminal of operational amplifier A 2_4B；
The sampling end is turned on the output terminal of operational amplifier A 2_4B.
Further, the power supply input circuit includes power input AVDDI, resistance R14, capacitance CT1, power supply output
C is held, one end of the resistance R14 is turned on power input AVDDI, and the other end of resistance R14 is turned on power output end C,
The anode of the capacitance CT1 is turned on power output end C, the cathode ground connection of the capacitance CT1.
The beneficial effects of the utility model：The utility model senses blood pressure by using second order high-pass filtering circuit
Device acquisition can be carried out by second order high-pass filtering circuit to direct current signal from after carrying out level-one amplification in the fluctuating signal of human body
Filtering, enables the utility model effectively to block direct current signal, and order to level-one operational amplification circuit only puts AC signal
Greatly again through second-order low-pass filter circuit output.Direct current signal can be effectively blocked by having the utility model, improve AC signal
Quality, convenient for identification of the upper computer software to signal, the advantages of state of an illness of medical staff is facilitated to be analyzed.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Fig. 2 is the circuit diagram of second order high-pass filtering circuit part in Fig. 1.
Fig. 3 is the circuit diagram of level-one operational amplification circuit part in Fig. 1.
Fig. 4 is the circuit diagram of second-order low-pass filter circuit part in Fig. 1.
Specific embodiment
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of blood pressure second order high-pass filtering amplifying circuit described in the utility model, including
Power supply input circuit, blood pressure sensor, level-one operational amplification circuit, second-order low-pass filter circuit, are adopted second order high-pass filtering circuit
Sample end, wherein：The power supply input circuit includes power input AVDDI, resistance R14, capacitance CT1, power output end C, institute
The one end for stating resistance R14 is turned on power input AVDDI, and the other end of resistance R14 is turned on power output end C, the electricity
The anode for holding CT1 is turned on power output end C, the cathode ground connection of the capacitance CT1；
The second order high-pass filtering circuit includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, capacitance C1, electricity
Hold C2, operational amplifier A 2_3A, point A in parallel,
One end of the resistance R1 is turned on blood pressure sensor, and the other end of resistance R1 is turned on one end of capacitance C1, institute
The other end for stating capacitance C1 is turned on parallel connection point A；
One end of the resistance R2 is turned on parallel connection point A, and the other end of resistance R2 is turned on one end of resistance R3, described
The other end of resistance R3 is turned on the reverse input end of operational amplifier A 2_3A；
One end of the capacitance C2 is turned on parallel connection point A, and the other end of capacitance C2 is same mutually defeated with operational amplifier A 2_3A's
Enter end conducting；
One end of the resistance R4 is turned on the in-phase input end of operational amplifier A 2_3A, the other end ground connection of resistance R4；
One end of the resistance R5 is turned on the in-phase input end of operational amplifier A 2_3A, the other end ground connection of resistance R5；
The model OPA2336U of the operational amplifier A 2_3A, the positive electricity source connection of operational amplifier A 2_3A with
The power output end C conductings that power supply input circuit is equipped with, negative electricity source connection and the ground connection of operational amplifier A 2_3A, computing are put
The output terminal of big device A2_3A is turned on the reverse input end of operational amplifier A 2_3A；
The level-one operational amplification circuit includes resistance R6, resistance R7, resistance R8, operational amplifier A 2_3B, capacitance C3,
One end of the resistance R6 is turned on the output terminal of operational amplifier A 2_3A in second order high-pass filtering circuit, and resistance R6's is another
End is turned on the in-phase input end of operational amplifier A 2_3B, the model OPA2336 of the operational amplifier A 2_3B；
One end of the resistance R7 is turned on the inverting input of operational amplifier A 2_3B, the other end ground connection of resistance R7；
One end of the capacitance C3 is turned on the inverting input of operational amplifier A 2_3B, the other end and fortune of capacitance C3
Calculate the output terminal conducting of amplifier A2_3B；
One end of the resistance R8 is turned on the inverting input of operational amplifier A 2_3B, one end of resistance R8 and computing
The output terminal conducting of amplifier A2_3B；
The second-order low-pass filter circuit includes resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, capacitance
C4, capacitance C5, capacitance C11, capacitance C12, operational amplifier A 2_4B, point B in parallel, the model of the operational amplifier A 2_4B
OPA2336, one end of the resistance R9 are turned on the output terminal of the operational amplifier A 2_3B in level-one operational amplification circuit, electricity
The other end of resistance R9 is turned on parallel connection point B；
One end of the resistance R10 is turned on with parallel connection point B, and the other end of resistance R10 is same with operational amplifier A 2_4B's
Phase input terminal turns on；
One end of the capacitance C11 is turned on parallel connection point B, the other end of capacitance C11 and the output of operational amplifier A 2_4B
End conducting；
One end of the capacitance C12 is turned on parallel connection point B, the other end of capacitance C12 and the output of operational amplifier A 2_4B
End conducting；
One end of the capacitance C4 is turned on the in-phase input end of operational amplifier A 2_4B, the other end ground connection of capacitance C4；
One end ground connection of the resistance R13, the other end of resistance R13 are turned on the output terminal of operational amplifier A 2_4B；
One end of the capacitance C5 is turned on the inverting input of operational amplifier A 2_4B, the other end and fortune of capacitance C5
Calculate the output terminal conducting of amplifier A2_4B；
One end of the resistance R11 is turned on the inverting input of operational amplifier A 2_4B, the other end of resistance R11 with
One end conducting of resistance R12, the other end of the resistance R12 are turned on the output terminal of operational amplifier A 2_4B；
The sampling end is turned on the output terminal of operational amplifier A 2_4B.
As shown in Figure 1, the utility model makes blood pressure sensor acquisition from people by using second order high-pass filtering circuit
After the fluctuating signal of body carries out level-one amplification, the filtering to direct current signal can be carried out by second order high-pass filtering circuit, makes this reality
Direct current signal is effectively blocked with New Energy, order to level-one operational amplification circuit is only amplified AC signal again low through second order
Bandpass filter circuit exports.Direct current signal can be effectively blocked by having the utility model, the quality of AC signal be improved, convenient for upper
Identification of the position machine software to signal, the advantages of state of an illness of medical staff is facilitated to be analyzed.
Claims (2)
1. a kind of blood pressure second order high-pass filtering amplifying circuit, it is characterised in that：Including power supply input circuit, blood pressure sensor, two
Rank high-pass filtering circuit, level-one operational amplification circuit, second-order low-pass filter circuit, sampling end, wherein：
The second order high-pass filtering circuit include resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, capacitance C1, capacitance C2,
Operational amplifier A 2_3A, point A in parallel,
One end of the resistance R1 is turned on blood pressure sensor, and the other end of resistance R1 is turned on one end of capacitance C1, the electricity
The other end for holding C1 is turned on parallel connection point A；
One end of the resistance R2 is turned on parallel connection point A, and the other end of resistance R2 is turned on one end of resistance R3, the resistance
The other end of R3 is turned on the reverse input end of operational amplifier A 2_3A；
One end of the capacitance C2 is turned on parallel connection point A, the other end of capacitance C2 and the in-phase input end of operational amplifier A 2_3A
Conducting；
One end of the resistance R4 is turned on the in-phase input end of operational amplifier A 2_3A, the other end ground connection of resistance R4；
One end of the resistance R5 is turned on the in-phase input end of operational amplifier A 2_3A, the other end ground connection of resistance R5；
The positive electricity source connection and power supply of the model OPA2336U of the operational amplifier A 2_3A, operational amplifier A 2_3A
The power output end C conductings that input circuit is equipped with, negative electricity source connection and ground connection, the operational amplifier of operational amplifier A 2_3A
The output terminal of A2_3A is turned on the reverse input end of operational amplifier A 2_3A；
The level-one operational amplification circuit includes resistance R6, resistance R7, resistance R8, operational amplifier A 2_3B, capacitance C3, described
One end of resistance R6 is turned on the output terminal of operational amplifier A 2_3A in second order high-pass filtering circuit, the other end of resistance R6 with
The in-phase input end conducting of operational amplifier A 2_3B, the model OPA2336 of the operational amplifier A 2_3B；
One end of the resistance R7 is turned on the inverting input of operational amplifier A 2_3B, the other end ground connection of resistance R7；
One end of the capacitance C3 is turned on the inverting input of operational amplifier A 2_3B, one end of capacitance C3 and operation amplifier
The output terminal conducting of device A2_3B；
One end of the resistance R8 is turned on the inverting input of operational amplifier A 2_3B, and the other end and the computing of resistance R8 are put
The output terminal conducting of big device A2_3B；
The second-order low-pass filter circuit includes resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, capacitance C4, electricity
Hold C5, capacitance C11, capacitance C12, operational amplifier A 2_4B, point B in parallel, the model of the operational amplifier A 2_4B
OPA2336, one end of the resistance R9 are turned on the output terminal of the operational amplifier A 2_3B in level-one operational amplification circuit, electricity
The other end of resistance R9 is turned on parallel connection point B；
One end of the resistance R10 is turned on parallel connection point B, the other end of resistance R10 and the homophase input of operational amplifier A 2_4B
End conducting；
One end of the capacitance C11 is turned on parallel connection point B, and the output terminal of the other end and operational amplifier A 2_4B of capacitance C11 is led
It is logical；
One end of the capacitance C12 is turned on parallel connection point B, and the output terminal of the other end and operational amplifier A 2_4B of capacitance C12 is led
It is logical；
One end of the capacitance C4 is turned on the in-phase input end of operational amplifier A 2_4B, the other end ground connection of capacitance C4；
One end ground connection of the resistance R13, the other end of resistance R13 are turned on the output terminal of operational amplifier A 2_4B；
One end of the capacitance C5 is turned on the inverting input of operational amplifier A 2_4B, and the other end and the computing of capacitance C5 are put
The output terminal conducting of big device A2_4B；
One end of the resistance R11 is turned on the inverting input of operational amplifier A 2_4B, the other end and resistance of resistance R11
One end conducting of R12, the other end of the resistance R12 are turned on the output terminal of operational amplifier A 2_4B；
The sampling end is turned on the output terminal of operational amplifier A 2_4B.
2. a kind of blood pressure second order high-pass filtering amplifying circuit according to claim 1, it is characterised in that：The power input
Circuit includes power input AVDDI, resistance R14, capacitance CT1, power output end C, and one end of the resistance R14 and power supply are defeated
Enter AVDDI is held to turn on, the other end of resistance R14 is turned on power output end C, anode and the power output end C of the capacitance CT1
Conducting, the cathode ground connection of the capacitance CT1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721436793.7U CN207460116U (en) | 2017-11-03 | 2017-11-03 | A kind of blood pressure second order high-pass filtering amplifying circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721436793.7U CN207460116U (en) | 2017-11-03 | 2017-11-03 | A kind of blood pressure second order high-pass filtering amplifying circuit |
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| CN207460116U true CN207460116U (en) | 2018-06-05 |
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|---|---|---|---|
| CN201721436793.7U Active CN207460116U (en) | 2017-11-03 | 2017-11-03 | A kind of blood pressure second order high-pass filtering amplifying circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844675A (en) * | 2018-09-05 | 2018-11-20 | 西安远方航空技术发展有限公司 | A kind of engine inlets distortion measurement dynamic pressure adjuster |
-
2017
- 2017-11-03 CN CN201721436793.7U patent/CN207460116U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844675A (en) * | 2018-09-05 | 2018-11-20 | 西安远方航空技术发展有限公司 | A kind of engine inlets distortion measurement dynamic pressure adjuster |
| CN108844675B (en) * | 2018-09-05 | 2023-10-31 | 西安远方航空技术发展有限公司 | Dynamic pressure regulator for measuring distortion of engine air inlet channel |
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