CN208508905U - AD wave filtering circuit - Google Patents
AD wave filtering circuit Download PDFInfo
- Publication number
- CN208508905U CN208508905U CN201821144454.6U CN201821144454U CN208508905U CN 208508905 U CN208508905 U CN 208508905U CN 201821144454 U CN201821144454 U CN 201821144454U CN 208508905 U CN208508905 U CN 208508905U
- Authority
- CN
- China
- Prior art keywords
- electrically connected
- resistance
- operational amplifier
- potentiometer
- voltage
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Networks Using Active Elements (AREA)
Abstract
The utility model discloses a kind of AD wave filtering circuits, including potentiometer Acquisition Circuit, first voltage Acquisition Circuit and second voltage Acquisition Circuit, wherein the potentiometer Acquisition Circuit has a potentiometer to be electrically connected to acquisition target voltage；The first voltage Acquisition Circuit is electrically connected to the potentiometer, and the upper arm voltage signal to acquire the potentiometer；The second voltage Acquisition Circuit is also electrically connected to the potentiometer, and the travelling arm voltage signal to acquire the potentiometer；And the output end of the first voltage Acquisition Circuit and the output end of the second voltage Acquisition Circuit further average and are not electrically connected to single-chip microcontroller, to carry out voltage signal processing；The AD wave filtering circuit not only increases the precision of entire AD sample circuit, and makes simple, low manufacture cost, is conducive to promotion and implementation.
Description
Technical field
The utility model relates to signal detection technique fields, specifically provide a kind of applied to analog voltage in embedded system
The AD wave filtering circuit of acquisition.
Background technique
Potentiometer acquisition module has been generally comprised in AD sample circuit.But due to the absolute resistance error of potentiometer generally compared with
Greatly, most potentiometer resistance errors can reach 5% by screening 10% or so, but so on the one hand operation will increase
Cost, and increase the requirement to AD sample circuit performance indicator, it on the other hand cannot also meet very well in the same old way and electricity is sampled to AD
The high-precision requirement in road.
In view of this, special propose the utility model.
Summary of the invention
In order to overcome drawbacks described above, the utility model provides a kind of AD wave filtering circuit, not only increases entire
The precision of AD sample circuit, and simple, low manufacture cost is made, it is conducive to promotion and implementation.
The utility model is to solve technical solution used by its technical problem: a kind of AD wave filtering circuit, packet
Include potentiometer Acquisition Circuit, first voltage Acquisition Circuit and second voltage Acquisition Circuit, wherein the potentiometer Acquisition Circuit tool
There is a potentiometer to be electrically connected to acquisition target voltage；The first voltage Acquisition Circuit is electrically connected to the potentiometer,
And the upper arm voltage signal to acquire the potentiometer；The second voltage Acquisition Circuit is also electrically connected to the potentiometer,
And the travelling arm voltage signal to acquire the potentiometer；And the output end of the first voltage Acquisition Circuit and described second
The output end of voltage collection circuit, which further averages, is not electrically connected to single-chip microcontroller, to carry out voltage signal processing.
Upper arm one end of the potentiometer is concatenated one first resistor of connection as a further improvement of the utility model,
Afterwards, it is electrically connected to acquisition target voltage；The upper arm other end of the potentiometer is grounded.
The first voltage Acquisition Circuit includes the first low-pass filter circuit as a further improvement of the utility model,
Circuit is followed with first voltage, wherein there is first low-pass filter circuit second resistance, 3rd resistor, the first operation to put
Big device, the first zener diode, first capacitor, the 4th resistance and the 5th resistance, one end of the second resistance are electrically connected to institute
Upper arm one end of potentiometer is stated, after the other end of the second resistance is concatenated the connection 3rd resistor, is electrically connected to described
The non-inverting input terminal of first operational amplifier；The cathode of first zener diode is electrically connected to the another of the second resistance
End, and the plus earth of first zener diode；One end of the first capacitor is electrically connected to first operation amplifier
The non-inverting input terminal of device, and the other end is grounded；One end of 4th resistance is electrically connected to the anti-of first operational amplifier
Phase input terminal, and the other end is grounded；One end of 5th resistance is electrically connected to the anti-phase input of first operational amplifier
End, the other end are electrically connected to the output end of first operational amplifier；
The first voltage follows circuit to have second operational amplifier, the 6th resistance, the 7th resistance and the second capacitor, institute
The non-inverting input terminal for stating second operational amplifier is electrically connected to the output end of first operational amplifier, the 6th resistance
One end is electrically connected to the inverting input terminal of the second operational amplifier, and one end of the 7th resistance is electrically connected to described second
The output end of operational amplifier, and the other end of the 7th resistance and the other end of the 6th resistance be connected in parallel after, draw
One first signal output line out, first signal output line is to be electrically connected to the single-chip microcontroller；In addition, second capacitor
It is electrically connected between one end of the 6th resistance and one end of the 7th resistance.
It is additionally provided with two two poles of the first Schottky for playing electrostatic clamping action as a further improvement of the utility model,
The anode of pipe, two first Schottky diodes is electrically connected to first signal output line respectively, and a wherein institute
The cathode for stating the first Schottky diode is electrically connected to an external stabilized power, the cathode of another first Schottky diode
Ground connection.
The second voltage Acquisition Circuit includes the second low-pass filter circuit as a further improvement of the utility model,
Circuit is followed with second voltage, wherein there is second low-pass filter circuit the 8th resistance, the 9th resistance, third operation to put
Big device, the second zener diode, third capacitor, the tenth resistance and eleventh resistor, one end of the 8th resistance are electrically connected to
The travelling arm of the potentiometer after the other end of the 8th resistance is concatenated connection the 9th resistance, is electrically connected to described
The non-inverting input terminal of third operational amplifier；The cathode of second zener diode is electrically connected to the another of the 8th resistance
End, and the plus earth of second zener diode；One end of the third capacitor is electrically connected to the third operation amplifier
The non-inverting input terminal of device, and the other end is grounded；One end of tenth resistance is electrically connected to the anti-of the third operational amplifier
Phase input terminal, and the other end is grounded；The reverse phase that one end of the eleventh resistor is electrically connected to the third operational amplifier is defeated
Enter end, the other end is electrically connected to the output end of the third operational amplifier；
The second voltage follows circuit to have four-operational amplifier, twelfth resistor, thirteenth resistor and the 4th electricity
To hold, the non-inverting input terminal of the four-operational amplifier is electrically connected to the output end of the third operational amplifier, and the described tenth
One end of two resistance is electrically connected to the inverting input terminal of the four-operational amplifier, one end electrical connection of the thirteenth resistor
In the output end of the four-operational amplifier, and the other end of the other end of the thirteenth resistor and the twelfth resistor
After being connected in parallel, a second signal output line is drawn, the second signal output line is to be electrically connected to the single-chip microcontroller；Separately
Outside, the 4th capacitor is electrically connected between one end of the twelfth resistor and one end of the thirteenth resistor.
It is additionally provided with two two poles of the second Schottky for playing electrostatic clamping action as a further improvement of the utility model,
The anode of pipe, two second Schottky diodes is electrically connected to the second signal output line respectively, and a wherein institute
The cathode for stating the second Schottky diode is electrically connected to an external stabilized power, the cathode of another second Schottky diode
Ground connection.
The beneficial effects of the utility model are: being 1. additionally arranged one to adopt by improving to AD wave filtering circuit
Collect the first voltage Acquisition Circuit and the travelling arm voltage signal to acquire potentiometer of the upper arm voltage signal of potentiometer
Second voltage Acquisition Circuit, and the output end of the first voltage Acquisition Circuit and second voltage Acquisition Circuit is further averaged and is not electrically connected
It is connected to single-chip microcontroller, the single-chip microcontroller carries out calculation process to the two-way voltage signal received, it may be assumed that the upper arm voltage signal
Value and the travelling arm voltage signal values do division arithmetic, and the two ratio is that the current location of the potentiometer travelling arm accounts for it
The ratio of whole strokes；It is unrelated with the absolute voltage of acquisition since what is calculated in above-mentioned calculation process is relative value, institute so as to
Influence caused by can eliminating because of potentiometer resistance error, temperature drift and ambient noise plays the role of common mode inhibition, effectively
Improve the precision of entire AD sample circuit.2. the AD wave filtering circuit is made of conventional and a small amount of electronic component, make
Work is simple, technical requirements are low, and low manufacture cost, is conducive to promotion and implementation.
Detailed description of the invention
Fig. 1 is the circuit theory schematic diagram of AD wave filtering circuit described in the utility model.
Specific embodiment
It is described in detail referring to preferred embodiment of the figure to the utility model.
Embodiment 1:
It please refers to shown in attached drawing 1, is the circuit theory schematic diagram of AD wave filtering circuit described in the utility model.It is described
AD wave filtering circuit include potentiometer Acquisition Circuit, first voltage Acquisition Circuit and second voltage Acquisition Circuit, wherein institute
Potentiometer Acquisition Circuit is stated with a potentiometer Rk to be electrically connected to acquisition target voltage；The first voltage Acquisition Circuit
It is electrically connected to the potentiometer Rk, and the upper arm voltage signal to acquire the potentiometer Rk；The second voltage acquisition electricity
Road is also electrically connected to the potentiometer Rk, and the travelling arm voltage signal to acquire the potentiometer Rk；And first electricity
The output end of the output end and the second voltage Acquisition Circuit of pressing Acquisition Circuit, which further averages, is not electrically connected to single-chip microcontroller, to carry out
Voltage signal processing.The single-chip microcontroller carries out calculation process to two-way voltage signal, it may be assumed that the upper arm voltage signal values and institute
It states travelling arm voltage signal values and does division arithmetic, the two ratio is that the current location of the potentiometer travelling arm accounts for its whole row
The ratio of journey；Unrelated with the absolute voltage of acquisition since what is calculated in above-mentioned calculation process is relative value, institute is in order to eliminating
Because of the influence caused by potentiometer resistance error, temperature drift and ambient noise, play the role of common mode inhibition, effectively improves
The precision of entire AD sample circuit.
In the present embodiment, it is preferred that after upper arm one end of the potentiometer Rk is concatenated one first resistor R1 of connection, electricity
It is connected to acquisition target voltage；The upper arm other end of the potentiometer Rk is grounded.
In the present embodiment, it is preferred that the first voltage Acquisition Circuit includes for filtering out high-frequency interferencing signal
Allow the first low-pass filter circuit that target frequency passes through and for signal isolation, make that front and back stages circuit will not interact
One voltage follower circuit, wherein there is first low-pass filter circuit second resistance R2,3rd resistor R3, the first operation to put
Big device U1, the first zener diode D1, first capacitor C1, the 4th resistance R4 and the 5th resistance R5, the one of the second resistance R2
End is electrically connected to upper arm one end of the potentiometer Rk, and the other end of the second resistance R2 is concatenated the connection 3rd resistor
After R3, it is electrically connected to the non-inverting input terminal of the first operational amplifier U1；The cathode of the first zener diode D1 is electrically connected
It is connected to the other end of the second resistance R2, and the plus earth of the first zener diode D1；The first capacitor C1's
One end is electrically connected to the non-inverting input terminal of the first operational amplifier U1, and the other end is grounded；The one of the 4th resistance R4
End is electrically connected to the inverting input terminal of the first operational amplifier U1, and the other end is grounded；One end of the 5th resistance R5
It is electrically connected to the inverting input terminal of the first operational amplifier U1, the other end is electrically connected to the first operational amplifier U1's
Output end；In first low-pass filter circuit, the second resistance R2 and the first zener diode D1 play pressure stabilizing clamper
Effect；The 3rd resistor R3 and first capacitor C1 as the first low-pass filter circuit cutoff frequency calculating according to
According to；The 5th resistance R5 is as feedback resistance, in the inverting input terminal and first fortune of the first operational amplifier U1
It calculates and forms negative-feedback between the output end of amplifier U1, and the 4th resistance R4 and the 5th resistance R5 resistance value are equal, so that institute
The gain for stating the first operational amplifier U1 is 1, to keep the forward and backward grade amplitude of sampled voltage consistent；
The first voltage follows circuit to have second operational amplifier U2, the 6th resistance R6, the 7th resistance R7 and second
Capacitor C2, the non-inverting input terminal of the second operational amplifier U2 are electrically connected to the output end of the first operational amplifier U1,
One end of the 6th resistance R6 is electrically connected to the inverting input terminal of the second operational amplifier U2, the 7th resistance R7's
One end is electrically connected to the output end of the second operational amplifier U2, and the other end of the 7th resistance R7 and the 6th electricity
The other end of resistance R6 is connected in parallel rear, one first signal output line of extraction, and first signal output line is to be electrically connected to
State single-chip microcontroller；In addition, the second capacitor C2 be electrically connected to the 6th resistance R6 one end and the 7th resistance R7 one
Between end；It is followed in circuit in the first voltage, the 6th resistance R6 and the 7th resistance R7 is current-limiting resistance, protection amplifier
Transistor inside input terminal；The second capacitor C2 plays effect of phase compensation.
It is further preferred that be additionally provided with two the first Schottky diode D2 for playing electrostatic clamping actions, two described the
The anode of one Schottky diode D2 is electrically connected to first signal output line respectively, and wherein first Schottky
The cathode of diode D2 is electrically connected to an external stabilized power (the work electricity for the voltage value and single-chip microcontroller that external stabilized power provides
Pressure value is equal), the cathode ground connection of another first Schottky diode D2.
In the present embodiment, it is preferred that the second voltage Acquisition Circuit includes for filtering out high-frequency interferencing signal
Allow the second low-pass filter circuit that target frequency passes through and for signal isolation, make that front and back stages circuit will not interact
Two voltage follower circuits, wherein there is second low-pass filter circuit the 8th resistance R8, the 9th resistance R9, third operation to put
Big device U3, the second zener diode D3, third capacitor C3, the tenth resistance R10 and eleventh resistor R11, the 8th resistance R8
One end be electrically connected to the travelling arm of the potentiometer Rk, the other end of the 8th resistance R8 is concatenated connection the 9th electricity
After hindering R9, it is electrically connected to the non-inverting input terminal of the third operational amplifier U3；The negative electricity of the second zener diode D3
It is connected to the other end of the 8th resistance R8, and the plus earth of the second zener diode D3；The third capacitor C3
One end be electrically connected to the non-inverting input terminal of the third operational amplifier U3, and the other end is grounded；The tenth resistance R10's
One end is electrically connected to the inverting input terminal of the third operational amplifier U3, and the other end is grounded；The eleventh resistor R11's
One end is electrically connected to the inverting input terminal of the third operational amplifier U3, and the other end is electrically connected to the third operational amplifier
The output end of U3；In second low-pass filter circuit, the 8th resistance R8 and the second zener diode D3 play pressure stabilizing
Clamping action；Calculating of the 9th resistance R9 and third capacitor C3 as the second low-pass filter circuit cutoff frequency
Foundation；The eleventh resistor R11 is as feedback resistance, in the inverting input terminal of the third operational amplifier U3 and described
Form negative-feedback between the output end of three operational amplifier U3, and the tenth resistance R10 and eleventh resistor R11 resistance value phase
Deng so that the gain of the third operational amplifier U3 is 1, to keep the forward and backward grade amplitude of sampled voltage consistent；
The second voltage follows circuit to have four-operational amplifier U4, twelfth resistor R12, thirteenth resistor R13
With the 4th capacitor C4, the non-inverting input terminal of the four-operational amplifier U4 is electrically connected to the defeated of the third operational amplifier U3
Outlet, one end of the twelfth resistor R12 are electrically connected to the inverting input terminal of the four-operational amplifier U4, and the described tenth
One end of three resistance R13 is electrically connected to the output end of the four-operational amplifier U4, and the thirteenth resistor R13's is another
The other end of end and the twelfth resistor R12 are connected in parallel rear, one second signal output line of extraction, the second signal output
Line is to be electrically connected to the single-chip microcontroller；In addition, the 4th capacitor C4 be electrically connected to the twelfth resistor R12 one end and
Between one end of the thirteenth resistor R13；It is followed in circuit in the second voltage, the twelfth resistor R12 and the tenth
Three resistance R13 are current-limiting resistance, protect the transistor inside amplifier input terminal；4th capacitor C4 plays effect of phase compensation.
It is further preferred that be additionally provided with two the second Schottky diode D4 for playing electrostatic clamping actions, two described the
The anode of two Schottky diode D4 is electrically connected to the second signal output line respectively, and wherein second Schottky
The cathode of diode D4 is electrically connected to an external stabilized power (the work electricity for the voltage value and single-chip microcontroller that external stabilized power provides
Pressure value is equal), the cathode ground connection of another second Schottky diode D4.
In conclusion the utility model is additionally arranged one to acquire current potential by improving to AD wave filtering circuit
Second electricity of the first voltage Acquisition Circuit of the upper arm voltage signal of device and a travelling arm voltage signal to acquire potentiometer
Acquisition Circuit is pressed, and the output end of the first voltage Acquisition Circuit and second voltage Acquisition Circuit further averages and is not electrically connected to list
Piece machine, the single-chip microcontroller carry out calculation process to the two-way voltage signal received, it may be assumed that the upper arm voltage signal values and institute
It states travelling arm voltage signal values and does division arithmetic, the two ratio is that the current location of the potentiometer travelling arm accounts for its whole row
The ratio of journey；Unrelated with the absolute voltage of acquisition since what is calculated in above-mentioned calculation process is relative value, institute is in order to eliminating
Because of the influence caused by potentiometer resistance error, temperature drift and ambient noise, play the role of common mode inhibition, effectively improves
The precision of entire AD sample circuit.In addition, the AD wave filtering circuit is made of conventional and a small amount of electronic component, make
Simply, technical requirements are low, and low manufacture cost, are conducive to promotion and implementation.
The above is only the preferred embodiment of the utility model, but is not intended to limit the utility model, and should refer to
It out, for those skilled in the art, without deviating from the technical principle of the utility model, can be with
Several improvements and modifications are made, these improvements and modifications also should be regarded as within the protection scope of the present utility model.
Claims (6)
1. a kind of AD wave filtering circuit, it is characterised in that: including potentiometer Acquisition Circuit, first voltage Acquisition Circuit and second
Voltage collection circuit, wherein the potentiometer Acquisition Circuit has a potentiometer to be electrically connected to acquisition target voltage
(Rk)；The first voltage Acquisition Circuit is electrically connected to the potentiometer (Rk), and to acquire the upper of the potentiometer (Rk)
Arm voltage signal；The second voltage Acquisition Circuit is also electrically connected to the potentiometer (Rk), and to acquire the potentiometer
(Rk) travelling arm voltage signal；And the output end of the first voltage Acquisition Circuit and the second voltage Acquisition Circuit is defeated
Outlet, which further averages, is not electrically connected to single-chip microcontroller, to carry out voltage signal processing.
2. AD wave filtering circuit according to claim 1, it is characterised in that: upper arm one end of the potentiometer (Rk) passes through
After a first resistor (R1) is connected in series, it is electrically connected to acquisition target voltage；The upper arm other end of the potentiometer (Rk) is grounded.
3. AD wave filtering circuit according to claim 1, it is characterised in that: the first voltage Acquisition Circuit includes
First low-pass filter circuit and first voltage follow circuit, wherein first low-pass filter circuit have second resistance (R2),
3rd resistor (R3), the first operational amplifier (U1), the first zener diode (D1), first capacitor (C1), the 4th resistance (R4)
With the 5th resistance (R5), one end of the second resistance (R2) is electrically connected to upper arm one end of the potentiometer (Rk), and described
After the other end of two resistance (R2) is concatenated the connection 3rd resistor (R3), it is electrically connected to first operational amplifier (U1)
Non-inverting input terminal；The cathode of first zener diode (D1) is electrically connected to the other end of the second resistance (R2), and
The plus earth of first zener diode (D1)；One end of the first capacitor (C1) is electrically connected to first operation and puts
The non-inverting input terminal of big device (U1), and the other end is grounded；One end of 4th resistance (R4) is electrically connected to first operation
The inverting input terminal of amplifier (U1), and the other end is grounded；One end of 5th resistance (R5) is electrically connected to first fortune
The inverting input terminal of amplifier (U1) is calculated, the other end is electrically connected to the output end of first operational amplifier (U1)；
The first voltage follows circuit to have second operational amplifier (U2), the 6th resistance (R6), the 7th resistance (R7) and the
Two capacitors (C2), the non-inverting input terminal of the second operational amplifier (U2) are electrically connected to first operational amplifier (U1)
One end of output end, the 6th resistance (R6) is electrically connected to the inverting input terminal of the second operational amplifier (U2), described
One end of 7th resistance (R7) is electrically connected to the output end of the second operational amplifier (U2), and the 7th resistance (R7)
The other end and the other end of the 6th resistance (R6) are connected in parallel rear, one first signal output line of extraction, first signal
Output line is to be electrically connected to the single-chip microcontroller；In addition, second capacitor (C2) is electrically connected to the 6th resistance (R6)
Between one end and one end of the 7th resistance (R7).
4. AD wave filtering circuit according to claim 3, it is characterised in that: be additionally provided with two and play electrostatic clamping action
The anode of first Schottky diode (D2), two first Schottky diodes (D2) is electrically connected to described first respectively
Signal output line, and wherein the cathode of first Schottky diode (D2) is electrically connected to an external stabilized power, it is another
The cathode of first Schottky diode (D2) is grounded.
5. AD wave filtering circuit according to claim 1, it is characterised in that: the second voltage Acquisition Circuit includes
Second low-pass filter circuit and second voltage follow circuit, wherein second low-pass filter circuit have the 8th resistance (R8),
9th resistance (R9), third operational amplifier (U3), the second zener diode (D3), third capacitor (C3), the tenth resistance (R10)
With eleventh resistor (R11), one end of the 8th resistance (R8) is electrically connected to the travelling arm of the potentiometer (Rk), and described
After the other end of eight resistance (R8) is concatenated connection the 9th resistance (R9), it is electrically connected to the third operational amplifier (U3)
Non-inverting input terminal；The cathode of second zener diode (D3) is electrically connected to the other end of the 8th resistance (R8), and
The plus earth of second zener diode (D3)；One end of the third capacitor (C3) is electrically connected to the third operation and puts
The non-inverting input terminal of big device (U3), and the other end is grounded；One end of tenth resistance (R10) is electrically connected to the third operation
The inverting input terminal of amplifier (U3), and the other end is grounded；One end of the eleventh resistor (R11) is electrically connected to the third
The inverting input terminal of operational amplifier (U3), the other end are electrically connected to the output end of the third operational amplifier (U3)；
The second voltage follows circuit to have four-operational amplifier (U4), twelfth resistor (R12), thirteenth resistor
(R13) it is electrically connected to the third operation with the 4th capacitor (C4), the non-inverting input terminal of the four-operational amplifier (U4) and puts
The output end of big device (U3), one end of the twelfth resistor (R12) is electrically connected to the anti-of the four-operational amplifier (U4)
One end of phase input terminal, the thirteenth resistor (R13) is electrically connected to the output end of the four-operational amplifier (U4), and institute
The other end of the other end and the twelfth resistor (R12) of stating thirteenth resistor (R13) is connected in parallel rear, one second letter of extraction
Number output line, the second signal output line is to be electrically connected to the single-chip microcontroller；In addition, the 4th capacitor (C4) electrical connection
Between one end of the twelfth resistor (R12) and one end of the thirteenth resistor (R13).
6. AD wave filtering circuit according to claim 5, it is characterised in that: be additionally provided with two and play electrostatic clamping action
The anode of second Schottky diode (D4), two second Schottky diodes (D4) is electrically connected to described second respectively
Signal output line, and wherein the cathode of second Schottky diode (D4) is electrically connected to an external stabilized power, it is another
The cathode of second Schottky diode (D4) is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821144454.6U CN208508905U (en) | 2018-07-19 | 2018-07-19 | AD wave filtering circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821144454.6U CN208508905U (en) | 2018-07-19 | 2018-07-19 | AD wave filtering circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208508905U true CN208508905U (en) | 2019-02-15 |
Family
ID=65289877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821144454.6U Withdrawn - After Issue CN208508905U (en) | 2018-07-19 | 2018-07-19 | AD wave filtering circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208508905U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768400A (en) * | 2018-07-19 | 2018-11-06 | 帝森克罗德集团有限公司 | AD wave filtering circuits |
-
2018
- 2018-07-19 CN CN201821144454.6U patent/CN208508905U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768400A (en) * | 2018-07-19 | 2018-11-06 | 帝森克罗德集团有限公司 | AD wave filtering circuits |
| CN108768400B (en) * | 2018-07-19 | 2023-10-20 | 帝森克罗德集团有限公司 | AD sampling filter circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108768400A (en) | AD wave filtering circuits | |
| CN208508905U (en) | AD wave filtering circuit | |
| CN104796114A (en) | Low-leakage error analogue integrator | |
| CN202583316U (en) | Circuit for collecting positive and negative current by single power supply | |
| CN207336632U (en) | A kind of radio-frequency power supply power-sensing circuit | |
| CN104811181A (en) | Current-to-voltage conversion circuit with input bias and active power filtering effects and current-to-voltage conversion method | |
| CN209878964U (en) | Current acquisition circuit of storage battery | |
| CN204559542U (en) | A kind of current-to-voltage converting circuit with inputting biased and active power filtering | |
| CN106932816A (en) | The voltage follower of Geological data collecting device | |
| CN207218645U (en) | A kind of small-signal Acquisition Circuit | |
| CN208239510U (en) | A kind of Weak current monitoring circuit under the condition of spark for earthing or grounding means | |
| CN203377862U (en) | An analog quantity input circuit using an isolating optical coupler | |
| CN208061191U (en) | A kind of emergent warning system of computer intelligence | |
| CN207689561U (en) | It is a kind of based on amplifier can bias-adjusted WeChat ID Acquisition Circuit | |
| CN103176052A (en) | Capacitance type sensor connector circuit | |
| CN202793480U (en) | Zero correction device for electromagnetic flowmeter | |
| CN203289451U (en) | High-sensitivity infrared receiving circuit | |
| CN201405754Y (en) | Current sampling and retaining circuit of automobile motor | |
| CN207732738U (en) | A kind of seismic instrument lower wattage power supply filter | |
| CN202059390U (en) | Improved signal acquisition and conditioning circuit | |
| CN206341190U (en) | Fifth harmonic circuit | |
| CN219417753U (en) | High count rate gamma detection circuit | |
| CN203289450U (en) | Infrared receiver | |
| CN208270636U (en) | It is a kind of can automatic clear integrating circuit | |
| CN203313128U (en) | Novel infrared amplifying circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190215 Effective date of abandoning: 20231020 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190215 Effective date of abandoning: 20231020 |