CN219958116U - Adjustable constant current source circuit applied to Hall current sensor - Google Patents
Adjustable constant current source circuit applied to Hall current sensor Download PDFInfo
- Publication number
- CN219958116U CN219958116U CN202321516528.5U CN202321516528U CN219958116U CN 219958116 U CN219958116 U CN 219958116U CN 202321516528 U CN202321516528 U CN 202321516528U CN 219958116 U CN219958116 U CN 219958116U
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistor
- current source
- constant current
- hall
- 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
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Measuring Magnetic Variables (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model discloses an adjustable constant current source circuit applied to a Hall current sensor, which comprises a constant current source circuit, an adjusting circuit and at least one Hall element, wherein the constant current source circuit is used for providing power supply current for the Hall element, the constant current source circuit comprises a reference circuit, a bias circuit, a voltage dividing circuit and a control circuit, the bias circuit is used for providing bias current for the reference circuit to enable the reference circuit to work stably, and the voltage precision and the temperature drift of the adjustable constant current source circuit are determined through the reference circuit so as to ensure the precision and the temperature drift of the power supply current provided by the control circuit for the Hall element, and further ensure the stability of output signals of the Hall element; meanwhile, the current output range of the constant current source circuit is adjusted through the voltage dividing circuit and the adjusting circuit, so that the precise constant current source circuits with different current ranges are obtained.
Description
Technical Field
The utility model relates to the technical field of sensor circuits, in particular to an adjustable constant current source circuit applied to a Hall current sensor.
Background
The sensor is a detecting device, which can detect the relative information of the detected equipment, and convert the relative information into an electric signal or other information output in a required form according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like. The application range of the sensor is very wide (for example, the sensor can be used in the fields of frequency converters, electric welding machines, UPS power supplies, electric automobiles, photovoltaics, wind power generation and the like), and a brand new technical support is provided for industrial automation. The Hall current sensor is a current detection element which is developed by applying the Hall effect principle and used for carrying out isolation detection on primary side current, a magnetic field generated by the primary side current is collected by a magnetic collecting ring, the magnetic field is collected by a Hall element arranged in the magnetic collecting ring, a Hall voltage which is equal to the primary side magnetic field in proportion is generated, and the isolation detection on the primary side current can be realized by measuring the magnitude of the Hall voltage. The method is widely applied to the automatic control fields of various current converting technologies, alternating current and direct current numerical control devices and the like which take current as a control object.
The existing Hall current sensor has two types of open loop and closed loop. The power supply mode of the Hall current sensor can be divided into voltage power supply and current power supply. The voltage type power supply mode mainly provides stable voltage for the Hall current sensor through the band gap reference or the voltage stabilizing module, but the Hall current sensor has a certain temperature coefficient, so that when the temperature changes, the power supply voltage is unchanged, the power consumption can fluctuate along with the temperature, the whole power consumption of the Hall current sensor cannot be maintained stable, and the use effect is poor.
Disclosure of Invention
Therefore, the embodiment of the utility model provides an adjustable constant current source circuit applied to a Hall current sensor, which aims to solve the problems of unstable overall power consumption and poor using effect of the Hall current sensor in the prior art.
In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:
an adjustable constant current source circuit applied to a Hall current sensor comprises a constant current source circuit, an adjusting circuit and at least one Hall element, wherein the constant current source circuit is used for providing power supply current for the at least one Hall element, and the adjusting circuit is used for adjusting the power supply current output by the constant current source circuit;
the constant current source circuit comprises a reference circuit, a bias circuit, a voltage dividing circuit and a control circuit, wherein the bias circuit is used for providing bias current for the reference circuit, and the reference circuit is used for providing reference voltage for the voltage dividing circuit;
the first end of the reference circuit is connected with a power supply, the second end of the reference circuit is connected with the first end of the bias circuit, and the third end of the reference circuit is connected with the first end of the voltage dividing circuit;
the second end of the voltage dividing circuit is connected with the power supply, and the third end of the voltage dividing circuit is connected with the first end of the biasing circuit;
the first end and the third end of the regulating circuit are respectively connected with the power supply, and the second end of the regulating circuit is connected with the voltage dividing circuit;
the first end of the control circuit is connected with the first end of the bias circuit, the second end of the control circuit is connected with the power supply, the third end of the control circuit is connected with the Hall element, and the second end of the bias circuit is grounded.
In the above scheme, optionally, the reference circuit includes a voltage reference chip AZ432, a first end of the voltage reference chip AZ432 is connected to a power supply, a second end of the voltage reference chip AZ432 is connected to a first end of the bias circuit, and a third end of the voltage reference chip AZ432 is connected to a first end of the voltage dividing circuit.
In the above solution, further optionally, the bias circuit includes a first resistor, a first end of the first resistor is connected to the second end of the reference circuit, and a second end of the first resistor is grounded.
In the above solution, further optionally, the voltage dividing circuit includes a second resistor, a third resistor, and a fourth resistor;
the first end of the fourth resistor is connected with the power supply, the second end of the fourth resistor is connected with the first end of the third resistor, the second end of the third resistor is connected with the third end of the reference circuit and the first end of the second resistor respectively, and the second end of the second resistor is connected with the first end of the first resistor.
In the above scheme, further optionally, the adjusting circuit includes a potentiometer, a first end and a third end of the potentiometer are respectively connected with the power supply, and a second end of the potentiometer is connected with a second end of the fourth resistor.
In the above scheme, further optionally, the control circuit is equal to the number of the hall elements and corresponds to the hall elements one by one, and the control circuit includes a fifth resistor and a triode;
the first end of the fifth resistor is connected with the power supply, and the second end of the fifth resistor is connected with the second end of the triode;
the first end of the triode is connected with the first end of the biasing circuit, and the third end of the triode is connected with the first end of the Hall element.
In the above solution, further optionally, in the case that the number of the hall elements is one, the adjustable constant current source circuit further includes a single signal acquisition circuit, where the single signal acquisition circuit includes a first operational amplifier, a sixth resistor, and a seventh resistor;
the second end of the Hall element is connected with the first input end of the first operational amplifier through the sixth resistor, the third end of the Hall element is grounded, and the fourth end of the Hall element is connected with the second input end of the first operational amplifier through the seventh resistor.
In the above solution, further optionally, when the number of the hall elements is at least two, the adjustable constant-current source circuit further includes a multi-path signal acquisition circuit, where the multi-path signal acquisition circuit includes a second operational amplifier, an eleventh resistor, and a twelfth resistor;
the first end of the eleventh resistor is connected with the first input end of the second operational amplifier, and the first end of the twelfth resistor is connected with the second input end of the second operational amplifier;
the second end of each Hall element is connected with the second end of the eleventh resistor through the corresponding x resistor, the third end of each Hall element is grounded, and the fourth end of each Hall element is connected with the second end of the twelfth resistor through the corresponding n resistor.
The utility model comprises a constant current source circuit, an adjusting circuit and at least one Hall element, wherein the constant current source circuit is used for providing power supply current for the Hall element, the constant current source circuit comprises a reference circuit, a bias circuit, a voltage dividing circuit and a control circuit, the bias circuit is used for providing bias current for the reference circuit to enable the reference circuit to work stably, and the voltage precision and the temperature drift of the adjustable constant current source circuit are determined through the reference circuit so as to ensure the precision and the temperature drift of the power supply current provided by the control circuit for the Hall element and further ensure the stability of the whole power consumption of the Hall element; meanwhile, the current output range of the constant current source circuit is adjusted through the voltage dividing circuit and the adjusting circuit, so that the precise constant current source circuits with different current ranges are obtained.
Drawings
In order to more clearly illustrate the prior art and the present utility model, the drawings used in the description of the prior art and the embodiments of the present utility model will be briefly described. It will be apparent to those skilled in the art that the drawings in the following description are merely exemplary and that other drawings may be derived from the drawings provided without the inventive effort to those skilled in the art.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, for example, modifications, variations in proportions, or otherwise, used in the practice of the utility model, which are particularly adapted to specific environments without departing from the spirit and scope of the utility model.
FIG. 1 is a schematic circuit diagram of an adjustable constant current source circuit for a Hall current sensor according to the present utility model;
FIG. 2 is a schematic diagram of another circuit of an adjustable constant current source circuit for a Hall current sensor according to the present utility model;
FIG. 3 is a table of parameters of a Hall element provided by the present utility model;
FIG. 4 is a table of parameters of a reference circuit provided by the present utility model;
fig. 5 is another parameter table of the reference circuit provided by the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the utility model, if any, are intended to distinguish between the referenced objects. For schemes with time sequence flows, such term expressions are not necessarily to be understood as describing a specific order or sequence, nor are such term expressions to distinguish between importance levels, positional relationships, etc. for schemes with device structures.
Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed but may include other steps or elements not expressly listed but inherent to such process, method, article, or apparatus or steps or elements that may be added based on a further optimization of the inventive concept.
As shown in fig. 1, the adjustable constant current source circuit applied to the hall current sensor is characterized by comprising a constant current source circuit, an adjusting circuit and at least one hall element, wherein the constant current source circuit is used for providing a supply current for the at least one hall element, and the adjusting circuit is used for adjusting the supply current output by the constant current source circuit;
the constant current source circuit comprises a reference circuit, a bias circuit, a voltage dividing circuit and a control circuit, wherein the bias circuit is used for providing bias current for the reference circuit, and the reference circuit is used for providing reference voltage for the voltage dividing circuit;
the first end of the reference circuit is connected with a power supply VCC, the second end of the reference circuit is connected with the first end of the bias circuit, and the third end of the reference circuit is connected with the first end of the voltage dividing circuit;
the second end of the voltage dividing circuit is connected with the power supply VCC, and the third end of the voltage dividing circuit is connected with the first end of the biasing circuit;
the first end and the third end of the regulating circuit are respectively connected with the power supply VCC, and the second end of the regulating circuit is connected with the voltage dividing circuit;
the first end of the control circuit is connected with the first end of the bias circuit, the second end of the control circuit is connected with the power supply VCC, the third end of the control circuit is connected with the Hall element, and the second end of the bias circuit is grounded.
In one embodiment, the reference circuit includes a voltage reference chip AZ432, a first end of the voltage reference chip AZ432 is connected to the power supply VCC, a second end of the voltage reference chip AZ432 is connected to the first end of the bias circuit, and a third end of the voltage reference chip AZ432 is connected to the first end of the voltage dividing circuit.
In one embodiment, the bias circuit includes a first resistor R1, a first end of the first resistor R1 is connected to a second end of the reference circuit, and a second end of the first resistor R1 is grounded.
In one embodiment, the voltage divider circuit includes a second resistor R2, a third resistor R3, and a fourth resistor R4;
the first end of the fourth resistor R4 is connected with the power supply VCC, the second end of the fourth resistor R4 is connected with the first end of the third resistor R3, the second end of the third resistor R3 is respectively connected with the third end of the reference circuit and the first end of the second resistor R2, and the second end of the second resistor R2 is connected with the first end of the first resistor R1.
In one embodiment, the adjusting circuit includes a potentiometer, a first end and a third end of the potentiometer are respectively connected with the power supply VCC, and a second end of the potentiometer is connected with a second end of the fourth resistor R4.
In one embodiment, the control circuit is equal to the number of the Hall elements and corresponds to the Hall elements one by one, and comprises a fifth resistor R5 and a triode Q1;
the first end of the fifth resistor R5 is connected with the power supply VCC, and the second end of the fifth resistor R5 is connected with the second end of the triode Q1;
the first end of the triode Q1 is connected with the first end of the biasing circuit, and the third end of the triode Q1 is connected with the first end of the Hall element.
In one embodiment, in the case that the number of the hall elements is one, the adjustable constant current source circuit further includes a single-path signal acquisition circuit including a first operational amplifier IC2, a sixth resistor R6, and a seventh resistor R7;
the second end of the Hall element is connected with the first input end of the first operational amplifier IC2 through a sixth resistor R6, the third end of the Hall element is grounded, and the fourth end of the Hall element is connected with the second input end of the first operational amplifier IC2 through a seventh resistor R7.
In this embodiment, the single-path signal acquisition circuit is used for acquiring an output signal of the hall element, the main function of the sixth resistor R6 is to send a signal output of the second end of the hall element to the first operational amplifier IC2 to participate in the operation, and the main function of the seventh resistor R7 is to send a signal output of the fourth end of the hall element to the first operational amplifier IC2 to participate in the operation.
In one embodiment, in the case where the number of the hall elements is at least two, the adjustable constant-current source circuit further includes a multi-path signal acquisition circuit including a second operational amplifier IC3, an eleventh resistor R11, and a twelfth resistor R12;
a first end of the eleventh resistor R11 is connected to the first input terminal of the second operational amplifier IC3, and a first end of the twelfth resistor R12 is connected to the second input terminal of the second operational amplifier IC 3;
the second end of each Hall element is connected with the second end of the eleventh resistor R11 through the corresponding X resistor RX, the third end of each Hall element is grounded, and the fourth end of each Hall element is connected with the second end of the twelfth resistor R12 through the corresponding n resistor Rn.
In this embodiment, the multi-channel signal acquisition circuit is configured to acquire output signals of a plurality of hall elements at the same time.
In this embodiment, it should be noted that, the second end of each hall element is connected with an xth resistor RX, and the resistance values of the xth resistors RX corresponding to different hall elements are equal; and the fourth end of each Hall element is connected with an nth resistor Rn, the resistance values of the nth resistors Rn corresponding to different Hall elements are equal, and the resistance RX and the resistance Rn are also equal to each other and take the value of 200 omega.
In one embodiment, as shown in fig. 1, the constant current source circuit is formed by resistors R1, R2, R3, R4, R5 and Q1 triode (mmbt 3906 SOT-23) and IC1 precision voltage reference AZ432 (1.25 VSOT-23 voltage reference), or AZ431 (2.5 VSOT-23 voltage reference), and then the node voltage is changed by a potentiometer (GF 063P1 adjustable resistor), so as to form the precision adjustable constant current source circuit. The circuit supplies power to a Hall element (HALL) in an open-loop Hall current sensor, so that the Hall element outputs a voltage signal under a specific magnetic field for acquisition by a later-stage circuit, and the IC2 is an operational amplifier.
Hall elements in open loop hall current sensors (1, 3 pins of the hall element are power supply pins, 2,4 pins are signal output pins) generally require a power supply current of less than 10mA in applications (fig. two are electrical parameters of the hall element). When VCC is +15V, IC1 is AZ432, R2 takes a value of 3.9K, and the reference voltage of AZ432 is 1.25V, so the voltage on the R2 resistor is 1.25V. The R1 resistor takes a value of 4.7K, and provides bias current for the IC1 to enable the IC1 to work stably. The R3 resistor takes a value of 2.2K, and the R4 resistor takes a value of 10K, and is connected in parallel with the R4 via a potentiometer of 20K. R3, R4 and resistor R2 form a series circuit, since the voltage across resistor R2 is constant at 1.25V, the voltage across R3 is R3/r2×1.25=0.705V, the maximum voltage across R4 is (10×20/30)/3.9×1.25= 2.137V when the maximum value of the potentiometer adjustment is 20K, and the minimum voltage is 0V when the potentiometer adjustment is 0 Ω. The resistor R5 takes a value of 510 Ω, which is the voltage across R5 is the sum of the voltages of resistors R2, R3, and R4 minus the triode PN junction voltage drop (0.7V), and the maximum value is 1.25v+0.705v+2.137V-0.7v= 3.392V. The output current of the transistor is 3.392/510=0.0067a=6.7 mA at maximum. The triode minimum output current is (1.25+0.705+0-0.7)/510=0.0025a=2.5 mA. As shown in fig. 2 and 3, the precise voltage stabilizer of the circuit IC1 determines the voltage precision and the temperature drift of the circuit, i.e. the precision and the temperature drift of the output current of the triode are ensured. The resistor R3 determines the adjustable minimum voltage, the resistor R4 determines the adjustable maximum voltage, and different voltages are obtained on the resistor R5 by adjusting the potentiometer to change the output current of the triode, namely, the output current is adjustable within 2.5-6.7 mA. The circuit can also change the resistance values of the resistors R3 and R4 to obtain precise constant current source circuits with different current ranges.
As shown in fig. 5, the variable constant current source circuit provides power to the variable circuit of the multi-hall element and how the output signal of the hall element is sent to the transport amplifier. The principle and calculation method of the circuit are the same as those of fig. 1. Output signals of pins 2 and 4 of the Hall elements are overlapped through corresponding resistors RX and RN (usually with the value of 200 omega) and then sent to an operational amplifier for calculation.
The above specific embodiments may be combined with each other and some embodiments may not be repeated for the same or similar concepts or processes.
Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.
The utility model has been described above with particularity and detail in connection with general description and specific embodiments. It should be noted that it is obvious that several variations and modifications can be made to these specific embodiments without departing from the scope of the present utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (8)
1. An adjustable constant current source circuit applied to a Hall current sensor is characterized by comprising a constant current source circuit, an adjusting circuit and at least one Hall element, wherein the constant current source circuit is used for providing power supply current for the at least one Hall element, and the adjusting circuit is used for adjusting the power supply current output by the constant current source circuit;
the constant current source circuit comprises a reference circuit, a bias circuit, a voltage dividing circuit and a control circuit, wherein the bias circuit is used for providing bias current for the reference circuit, and the reference circuit is used for providing reference voltage for the voltage dividing circuit;
the first end of the reference circuit is connected with a power supply (VCC), the second end of the reference circuit is connected with the first end of the bias circuit, and the third end of the reference circuit is connected with the first end of the voltage dividing circuit;
the second end of the voltage dividing circuit is connected with the power supply (VCC), and the third end of the voltage dividing circuit is connected with the first end of the biasing circuit;
the first end and the third end of the regulating circuit are respectively connected with the power supply (VCC), and the second end of the regulating circuit is connected with the voltage dividing circuit;
the first end of the control circuit is connected with the first end of the bias circuit, the second end of the control circuit is connected with the power supply (VCC), the third end of the control circuit is connected with the Hall element, and the second end of the bias circuit is grounded.
2. The adjustable constant current source circuit for a hall current sensor according to claim 1, wherein the reference circuit comprises a voltage reference chip AZ432, a first terminal of the voltage reference chip AZ432 is connected to a power supply (VCC), a second terminal of the voltage reference chip AZ432 is connected to the first terminal of the bias circuit, and a third terminal of the voltage reference chip AZ432 is connected to the first terminal of the voltage dividing circuit.
3. The adjustable constant current source circuit for a hall current sensor according to claim 1, wherein the bias circuit comprises a first resistor (R1), a first end of the first resistor (R1) being connected to a second end of the reference circuit, and a second end of the first resistor (R1) being grounded.
4. An adjustable constant current source circuit for a hall current sensor according to claim 3, characterized in that the voltage dividing circuit comprises a second resistor (R2), a third resistor (R3) and a fourth resistor (R4);
the first end of the fourth resistor (R4) is connected with the power supply (VCC), the second end of the fourth resistor (R4) is connected with the first end of the third resistor (R3), the second end of the third resistor (R3) is respectively connected with the third end of the reference circuit and the first end of the second resistor (R2), and the second end of the second resistor (R2) is connected with the first end of the first resistor (R1).
5. The adjustable constant current source circuit for a hall current sensor according to claim 4, wherein the adjusting circuit comprises a potentiometer, a first end and a third end of the potentiometer are respectively connected with the power supply (VCC), and a second end of the potentiometer is connected with a second end of the fourth resistor (R4).
6. The adjustable constant current source circuit applied to the hall current sensor according to claim 1, wherein the control circuit is equal in number and one-to-one correspondence with the hall elements, and comprises a fifth resistor (R5) and a triode (Q1);
a first end of the fifth resistor (R5) is connected with the power supply (VCC), and a second end of the fifth resistor (R5) is connected with a second end of the triode (Q1);
the first end of the triode (Q1) is connected with the first end of the biasing circuit, and the third end of the triode (Q1) is connected with the first end of the Hall element.
7. The adjustable constant current source circuit applied to the hall current sensor according to claim 1, wherein in the case that the number of the hall elements is one, the adjustable constant current source circuit further comprises a one-way signal pickup circuit including a first operational amplifier (IC 2), a sixth resistor (R6), and a seventh resistor (R7);
the second end of the Hall element is connected with the first input end of the first operational amplifier (IC 2) through the sixth resistor (R6), the third end of the Hall element is grounded, and the fourth end of the Hall element is connected with the second input end of the first operational amplifier (IC 2) through the seventh resistor (R7).
8. The adjustable constant current source circuit applied to the hall current sensor according to claim 1, wherein in the case where the number of the hall elements is at least two, the adjustable constant current source circuit further includes a multi-path signal pickup circuit including a second operational amplifier (IC 3), an eleventh resistor (R11), and a twelfth resistor (R12);
a first end of the eleventh resistor (R11) is connected to the first input end of the second operational amplifier (IC 3), and a first end of the twelfth resistor (R12) is connected to the second input end of the second operational amplifier (IC 3);
the second end of each Hall element is respectively connected with the second end of the eleventh resistor (R11) through the corresponding x-th resistor (Rx), the third end of each Hall element is grounded, and the fourth end of each Hall element is respectively connected with the second end of the twelfth resistor (R12) through the corresponding n-th resistor (Rn).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321516528.5U CN219958116U (en) | 2023-06-14 | 2023-06-14 | Adjustable constant current source circuit applied to Hall current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321516528.5U CN219958116U (en) | 2023-06-14 | 2023-06-14 | Adjustable constant current source circuit applied to Hall current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219958116U true CN219958116U (en) | 2023-11-03 |
Family
ID=88536169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321516528.5U Active CN219958116U (en) | 2023-06-14 | 2023-06-14 | Adjustable constant current source circuit applied to Hall current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219958116U (en) |
-
2023
- 2023-06-14 CN CN202321516528.5U patent/CN219958116U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101330252B (en) | DC-DC converter with temperature compensating circuit | |
| EP2480947B1 (en) | Compensated bandgap | |
| CN102288810B (en) | Voltage detection circuit | |
| CN205175565U (en) | Temperature sensor device and sensing system | |
| KR20080019196A (en) | Current-voltage conversion circuit and power consumption detection circuit and electronic device using the same | |
| US20080258804A1 (en) | Numerical band gap | |
| US10088532B2 (en) | Temperature compensation circuit and sensor device | |
| JP2011150582A (en) | Reference voltage generation circuit and analog circuit using the same | |
| CN110427067A (en) | A method of improving current sample precision with analog circuit | |
| CN103809642A (en) | Current output circuit and two-wire transmitter | |
| CN110907807B (en) | Chip circuit power consumption measuring circuit and method and chip | |
| CN103365330A (en) | Reference voltage/current generation device | |
| CN219958116U (en) | Adjustable constant current source circuit applied to Hall current sensor | |
| CN106959718A (en) | Adjuster | |
| KR101677422B1 (en) | Multiple output current sensor using hall element | |
| CN106656120A (en) | Clock compensation circuit, clock circuit and microcontroller | |
| JP5981890B2 (en) | Hall element drive circuit | |
| US9304528B2 (en) | Reference voltage generator with op-amp buffer | |
| US20160322965A1 (en) | Differential comparator with stable offset | |
| CN101320279B (en) | Current generator | |
| CN102236359A (en) | Band gap reference system not changing with power supply | |
| CN102012279A (en) | Dual-constant current source temperature measurement system for thermal resistor | |
| CN106841751B (en) | Voltage rise and fall quantitative detection circuit/device | |
| CN114740941B (en) | Bandgap reference circuit, integrated circuit, and electronic device | |
| CN102360236A (en) | High-voltage end current detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |