CN219394800U - Filtering and amplifying thick film circuit for avionic instrument - Google Patents
Filtering and amplifying thick film circuit for avionic instrument Download PDFInfo
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- CN219394800U CN219394800U CN202320724260.8U CN202320724260U CN219394800U CN 219394800 U CN219394800 U CN 219394800U CN 202320724260 U CN202320724260 U CN 202320724260U CN 219394800 U CN219394800 U CN 219394800U
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Abstract
The utility model discloses a filtering and amplifying thick film circuit for a voyage instrument, which belongs to the technical field of voyage instruments, wherein a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a fourth resistor R4, an operational amplifier A and a fifth resistor R5 are mutually connected to form an active filtering circuit, the load of the active filtering circuit does not influence the filtering characteristic, the filtering circuit is particularly suitable for the voyage instrument with high signal processing requirements, and when the frequency of an input signal is lower than the corner frequency, the impedance of the first capacitor C1 and the second capacitor C2 is very large, the shunt effect is avoided, and a low-frequency signal is output through the fifth resistor R5; when the frequency of the input signal is higher than the corner frequency, at this time, because the impedance of the first capacitor C1 and the second capacitor C2 is already small, the high-frequency signal passing through the first resistor R1 is shunted from the second capacitor C2 to the ground and is not output, so as to achieve the purpose of low-pass filtering, and further the low-pass filtering effect is obvious and the output of the low-frequency signal is not disturbed.
Description
Technical Field
The utility model relates to the technical field related to avionic instruments, in particular to a filtering and amplifying thick film circuit for an avionic instrument.
Background
The avionic device generally comprises a three-axis acceleration sensor, a three-axis fluxgate sensor and a three-axis gyroscope sensor, wherein the acceleration sensor and the gyroscope with higher precision are analog voltage output, and signals of the acceleration sensor and the gyroscope are smaller, and the sensor output signals need to be amplified and filtered before analog-digital conversion in order to reduce sensor noise and improve resolution and measurement precision.
Chinese patent CN202202858U, for example, discloses a low noise preamplifier thick film circuit, the module shape of which is rectangular. The method is characterized in that: comprises 24 needle-shaped pins which are respectively arranged at two sides of the module. The circuit comprises: the signals after coil coupling are input by a 23 pin Vin1 and a 24 pin Vin2, and Vin1 is grounded through a resistor R1 to provide direct current bias, then is connected with a capacitor C1 and then is connected with R3, and is connected with the grid electrode of Q3. Vin2 is grounded through a resistor R2 to provide direct current bias, then connected with a capacitor C2 and then connected with R4, and simultaneously connected with the grid electrode of Q4. Resistors R3 and R4 are connected to ground through C3 while being connected to resistors R13 and R14. The other end of the resistor R14 is connected with a negative power supply VSS with 10 pins, the other end of the resistor R13 is connected with the non-inverting input ends of the operational amplifiers U1A and U1C, and is grounded through a capacitor C7, and is also connected with a positive power supply VCC with 13 pins through a resistor R12; the low-pass filtering effect is not obvious and the output of the low-frequency signal is disturbed.
Disclosure of Invention
The utility model provides a filtering amplifying thick film circuit for a voyage instrument, which aims to solve the technical problems.
The specific technical scheme provided by the utility model is as follows:
the utility model provides a filtering and amplifying thick film circuit for a voyage instrument, which comprises a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a fourth resistor R4, an operational amplifier OP and a fifth resistor R5, wherein the first resistor R1 is connected with a signal input terminal IN, the fifth resistor R5 is connected with an output terminal OUT, and the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the second capacitor C2, the fourth resistor R4, the operational amplifier A and the fifth resistor R5 are mutually connected to form an active filtering circuit.
Optionally, the third resistor R3 is connected in series with the first resistor R1 and the fifth resistor R5, the second resistor R2 is connected in series with the first capacitor C1, and the third resistor R3 is connected in parallel with the second resistor R2 and the first capacitor C1.
Optionally, the right side of the second resistor R2 is connected to the first resistor R1, the left side of the second resistor R2 is connected to the first capacitor C1 and the inverting input terminal of the operational amplifier OP, the upper end of the fourth resistor R4 is connected to the forward input terminal of the operational amplifier OP, and the lower end of the fourth resistor R4 is connected to the lower end of the second capacitor C2 in parallel and then grounded.
Optionally, the output end of the operational amplifier OP is connected in parallel with the left end of the first capacitor C1 and the left end of the third resistor R3, and then is connected with the right end of the fifth resistor R5.
Optionally, the right end of the third resistor R3, the right end of the second resistor R2 and the upper end of the second capacitor C2 are connected in parallel and then connected to the left end of the first resistor R1.
The beneficial effects of the utility model are as follows:
the embodiment of the utility model provides a filtering and amplifying thick film circuit for a voyage instrument, which comprises a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a fourth resistor R4, an operational amplifier OP and a fifth resistor R5, wherein the first resistor R1 is connected with a signal input terminal IN, the fifth resistor R5 is connected with an output terminal OUT, and the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the second capacitor C2, the fourth resistor R4, the operational amplifier A and the fifth resistor R5 are mutually connected to form an active filtering circuit; the load of the active filter circuit does not influence the filter characteristic, and is particularly suitable for being used in a voyage appearance with high signal processing requirement, when the frequency of an input signal is lower than the corner frequency, the low-frequency signal is output through a fifth resistor R5 due to the fact that the impedance of the first capacitor C1 and the second capacitor C2 is large and no shunt effect exists; when the frequency of the input signal is higher than the corner frequency, at this time, because the impedance of the first capacitor C1 and the second capacitor C2 is already small, the high-frequency signal passing through the first resistor R1 is shunted from the second capacitor C2 to the ground and is not output, so as to achieve the purpose of low-pass filtering, and further the low-pass filtering effect is obvious and the output of the low-frequency signal is not disturbed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a filtering amplifying thick film circuit for a avionic instrument according to an embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
A filtering and amplifying thick film circuit for a avionic device according to an embodiment of the present utility model will be described in detail with reference to fig. 1.
Referring to fig. 1, the filtering and amplifying thick film circuit for a avionic instrument provided by the embodiment of the utility model includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a fourth resistor R4, an operational amplifier OP and a fifth resistor R5, wherein the first resistor R1 is connected with a signal input terminal IN, the fifth resistor R5 is connected with an output terminal OUT, and the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the second capacitor C2, the fourth resistor R4, the operational amplifier a and the fifth resistor R5 are connected with each other to form an active filtering circuit.
Referring to fig. 1, a third resistor R3 is connected in series with the first resistor R1 and the fifth resistor R5, a second resistor R2 is connected in series with the first capacitor C1, and the third resistor R3 is connected in parallel with the second resistor R2 and the first capacitor C1. The right side of the second resistor R2 is connected with the first resistor R1, the left side of the second resistor R2 is connected with the first capacitor C1 and the reverse input end of the operational amplifier OP, the upper end of the fourth resistor R4 is connected with the forward input end of the operational amplifier OP, and the lower end of the fourth resistor R4 is grounded after being connected in parallel with the lower end of the second capacitor C2. The output end of the operational amplifier OP is connected in parallel with the left end of the first capacitor C1 and the left end of the third resistor R3, and then connected with the right end of the fifth resistor R5. The right end of the third resistor R3, the right end of the second resistor R2 and the upper end of the second capacitor C2 are connected in parallel and then connected with the left end of the first resistor R1.
Referring to fig. 1, IN the filtering and amplifying thick film circuit for a voyage instrument provided by the embodiment of the utility model, the right side of the first resistor R1 is connected with the signal input end IN, the left side of the first resistor R1 is connected with the right side of the second resistor R2, the first resistor R1 and the second resistor R2 are simultaneously connected with the right side of the third resistor R3 and the upper end of the second capacitor C2, the left side of the second resistor R2 is connected with the reverse input end of the operational amplifier OP and the right side of the first capacitor C1, the left side of the first capacitor C1 and the third resistor R3 are simultaneously connected with the output of the operational amplifier OP, the forward input end of the operational amplifier OP is connected with the fourth resistor R4, the fourth resistor R4 is connected with the second capacitor C2 and grounded, the right side of the fifth resistor R5 is connected with the output of the operational amplifier OP, and the left side of the fifth resistor R5 is connected with the signal output terminal OUT.
The first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the second capacitor C2, the fourth resistor R4, the operational amplifier A and the fifth resistor R5 of the filtering and amplifying thick film circuit for the avionic instrument are connected with one another to form an active filtering circuit, the load of the active filtering circuit does not influence the filtering characteristic, the filtering and amplifying thick film circuit is particularly suitable for the avionic instrument with high signal processing requirements, and when the frequency of an input signal is lower than the corner frequency, the impedance of the first capacitor C1 and the second capacitor C2 is very high, the shunt effect is avoided, and a low-frequency signal is output through the fifth resistor R5; when the frequency of the input signal is higher than the corner frequency, at this time, because the impedance of the first capacitor C1 and the second capacitor C2 is already small, the high-frequency signal passing through the first resistor R1 is shunted from the second capacitor C2 to the ground and is not output, so as to achieve the purpose of low-pass filtering, and further the low-pass filtering effect is obvious and the output of the low-frequency signal is not disturbed.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present utility model without departing from the spirit or scope of the embodiments of the utility model. Thus, if such modifications and variations of the embodiments of the present utility model fall within the scope of the claims and the equivalents thereof, the present utility model is also intended to include such modifications and variations.
Claims (5)
1. The filtering and amplifying thick film circuit for the avionic instrument is characterized by comprising a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a fourth resistor R4, an operational amplifier OP and a fifth resistor R5, wherein the first resistor R1 is connected with a signal input terminal IN, the fifth resistor R5 is connected with an output terminal OUT, and the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the second capacitor C2, the fourth resistor R4, the operational amplifier A and the fifth resistor R5 are mutually connected to form an active filtering circuit.
2. The filter amplifier thick film circuit of claim 1, wherein a third resistor R3 is connected in series with the first resistor R1 and the fifth resistor R5, a second resistor R2 is connected in series with the first capacitor C1, and the third resistor R3 is connected in parallel with the second resistor R2 and the first capacitor C1.
3. The filter amplifier thick film circuit of claim 2, wherein the right side of the second resistor R2 is connected to the first resistor R1, the left side of the second resistor R2 is connected to the first capacitor C1 and the inverting input terminal of the operational amplifier OP, the upper end of the fourth resistor R4 is connected to the forward input terminal of the operational amplifier OP, and the lower end of the fourth resistor R4 is connected in parallel to the lower end of the second capacitor C2 and then grounded.
4. The filter amplifier thick film circuit according to claim 2, wherein an output terminal of the operational amplifier OP is connected to a right terminal of the fifth resistor R5 after being connected in parallel with a left terminal of the first capacitor C1 and a left terminal of the third resistor R3.
5. The filter amplifying thick film circuit according to claim 2, wherein the right end of the third resistor R3, the right end of the second resistor R2 and the upper end of the second capacitor C2 are connected in parallel to each other and then connected to the left end of the first resistor R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320724260.8U CN219394800U (en) | 2023-04-04 | 2023-04-04 | Filtering and amplifying thick film circuit for avionic instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320724260.8U CN219394800U (en) | 2023-04-04 | 2023-04-04 | Filtering and amplifying thick film circuit for avionic instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219394800U true CN219394800U (en) | 2023-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320724260.8U Active CN219394800U (en) | 2023-04-04 | 2023-04-04 | Filtering and amplifying thick film circuit for avionic instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219394800U (en) |
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2023
- 2023-04-04 CN CN202320724260.8U patent/CN219394800U/en active Active
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