CN116009638B - Reference voltage generation circuit, control method and device thereof and medium - Google Patents
Reference voltage generation circuit, control method and device thereof and medium Download PDFInfo
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- CN116009638B CN116009638B CN202310151291.3A CN202310151291A CN116009638B CN 116009638 B CN116009638 B CN 116009638B CN 202310151291 A CN202310151291 A CN 202310151291A CN 116009638 B CN116009638 B CN 116009638B
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The application relates to the technical field of reference voltage and discloses a reference voltage generation circuit, a control method, a control device and a medium thereof, wherein the reference voltage generation circuit comprises: the control unit, band gap reference circuit and bleeder circuit, bleeder circuit include first resistance, second resistance and zero ohm resistance, and the public end that first resistance and second resistance series connection produced is connected with the one end of zero ohm resistance, and the other end of first resistance is connected with the power. The control unit is respectively connected with the band gap reference circuit and the voltage dividing circuit, the output end of the band gap reference circuit is connected with the voltage dividing circuit through the controllable switch, when the noise is determined to be larger than the preset value, the enabling end input of the band gap reference circuit is controlled to be zero, and the controllable switch is controlled to be closed, so that the voltage dividing circuit generates the reference voltage. Therefore, when the noise is large, stable reference voltage can be provided by the voltage dividing circuit, and the influence of the noise on the band gap reference circuit is avoided, so that the phenomenon of rolling fine transverse lines or shaking fine transverse lines is avoided.
Description
Technical Field
The present disclosure relates to the field of reference voltage technologies, and in particular, to a reference voltage generating circuit, a control method, a control device, and a medium thereof.
Background
With the advanced development of social integrated circuits, more and more mobile electronic products enter people's life. In these electronic devices, a power management system is required to ensure stability of the battery voltage in the product, typically using a Bandgap reference circuit (Bandgap circuit) to provide a precise, stable reference Voltage (VREF).
In the use of VREF of a band gap circuit in driving a display IC, a product of an amorphous silicon (a-Si) thin film transistor (Thin Film Transisto, abbreviated as TFT) screen is generally adopted, one of which displays a gray-scale voltage difference of about 8 millivolts (mV), and a product of an Organic Light Emitting Diode (OLED) screen is adopted, one of which displays a gray-scale voltage difference of about 1 mV to 3 mV.
When the Bandgap circuit is affected by noise, VREF can shake, the shake of VREF is on an A-Si TFT product, visual effect is difficult to see abnormal, however, on an OLED product, the shake amount of VREF is easily larger than one gray level voltage, and further, the phenomenon of rolling fine transverse lines or shaking fine transverse lines occurs on the OLED product, and further, user experience is reduced.
At present, the current of the band gap circuit can be increased to reduce noise in a relative proportion, however, the power consumption of the band gap circuit can be increased in such a way, the noise interference source is difficult to be simulated and quantified, the difference of different processes is difficult to master, and the mass production risk of OLED products can be improved. In addition, the layout area of the band gap circuit can be increased, so that the band gap circuit is far away from a noise source as far as possible to reduce noise influence, further, the phenomenon of rolling fine cross stripes or shaking fine cross stripes is avoided, and the cost is increased due to the increase of the layout area of the band gap circuit.
Therefore, how to realize the anti-interference of the band gap circuit, avoid the phenomenon of rolling fine transverse lines or shaking fine transverse lines, improve the user experience and solve the problem of the technical personnel in the field.
Disclosure of Invention
The purpose of the application is to provide a reference voltage generation circuit, a control method, a control device and a medium thereof, which are used for realizing the anti-interference of a Bandgap circuit, avoiding the phenomenon of rolling fine transverse lines or shaking fine transverse lines and improving the user experience.
In order to solve the above technical problems, the present application provides a reference voltage generating circuit,
comprising the following steps: a control unit, a band gap reference circuit and a voltage dividing circuit;
the voltage dividing circuit comprises a first resistor, a second resistor and a zero ohm resistor, wherein a public end generated by the series connection of the first resistor and the second resistor is connected with one end of the zero ohm resistor, the other end of the first resistor is connected with a power supply, the other end of the second resistor is grounded, and the other end of the zero ohm resistor is used as a connecting end of the voltage dividing circuit;
the output end of the band gap reference circuit is connected with the voltage dividing circuit through a controllable switch, the control unit is respectively connected with the band gap reference circuit and the controllable switch, and the control unit is used for controlling the input of the enabling end of the band gap reference circuit to be zero and controlling the controllable switch to be closed when the noise is determined to be larger than a preset value, so that the voltage dividing circuit generates a reference voltage.
Preferably, the control unit is configured to control the enable end input of the bandgap reference circuit to be one and control the controllable switch to be turned off when it is determined that the noise is not greater than a preset value.
Preferably, the magnitude of the reference voltage is adjusted according to the ratio of the first resistor and the second resistor.
Preferably, the voltage dividing circuit further comprises a capacitor;
one end of the capacitor is connected with the other end of the zero ohm resistor, and the other end of the capacitor is grounded.
Preferably, the power source is a power source provided by a power management integrated circuit.
In order to solve the above technical problem, the present application further provides a control method of a reference voltage generating circuit, which is applied to the reference voltage generating circuit, including:
when the noise is determined to be larger than a preset value, the enabling end input of the band gap reference circuit is controlled to be zero, and the controllable switch is controlled to be closed, so that the voltage divider circuit generates the reference voltage.
In order to solve the above technical problem, the present application further provides a control device of a reference voltage generating circuit, which is applied to the reference voltage generating circuit, and includes:
and the control module is used for controlling the input of the enabling end of the band gap reference circuit to be zero when the noise is larger than the preset value, and controlling the controllable switch to be closed so as to generate the reference voltage by the voltage dividing circuit.
In order to solve the technical problem, the present application further provides a control device of the reference voltage generating circuit, which is applied to the reference voltage generating circuit, and comprises a memory for storing a computer program;
and the processor is used for realizing the steps of the control method of the reference voltage generation circuit when executing the computer program.
In order to solve the above technical problem, the present application further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the control method of the reference voltage generating circuit.
The invention provides a reference voltage generating circuit, comprising: the control unit, band gap reference circuit and bleeder circuit, bleeder circuit include first resistance, second resistance and zero ohm resistance, and the public end that first resistance and second resistance series connection produced is connected with the one end of zero ohm resistance, and the other end of first resistance is connected with the power, and the other end ground connection of second resistance, the other end of zero ohm resistance is as bleeder circuit's link. The control unit is respectively connected with the band gap reference circuit and the voltage dividing circuit, the output end of the band gap reference circuit is connected with the voltage dividing circuit through the controllable switch, and the control circuit is used for controlling the input of the enabling end of the band gap reference circuit to be zero and controlling the controllable switch to be closed when the noise is determined to be larger than a preset value, so that the voltage dividing circuit can generate the reference voltage.
Therefore, according to the technical scheme provided by the application, under the condition of large noise, stable reference voltage can be provided by the voltage dividing circuit according to the display effect, so that the layout area of the band gap reference circuit is not required to be increased in an unlimited manner, the influence of noise on the band gap reference circuit is avoided, the phenomenon of rolling thin transverse lines or shaking thin transverse lines is avoided, the stability of the reference voltage is improved, and meanwhile, the mass production possibility of related electronic products is improved.
In addition, the application also provides a control method, a device and a medium of the reference voltage generation circuit, which correspond to the reference voltage generation circuit and have the same effects.
Drawings
For a clearer description of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit diagram of a reference voltage generating circuit according to an embodiment of the present application;
fig. 2 is a block diagram of a control device of a reference voltage generating circuit according to another embodiment of the present application;
the reference numerals are as follows: 1 is a control unit, 2 is a band gap reference circuit, and 3 is a voltage dividing circuit.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments herein without making any inventive effort are intended to fall within the scope of the present application.
The core of the application is to provide a reference voltage generation circuit, a control method, a control device and a medium thereof, which are used for realizing the anti-interference of a Bandgap circuit and avoiding the phenomenon of rolling fine transverse lines or shaking fine transverse lines.
In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description.
With the advanced development of social integrated circuits, more and more mobile electronic products enter people's life. In these electronic devices, a power management system is required to ensure stability of the battery voltage in the product, typically using a Bandgap circuit to provide a precise, stable VREF.
In the use of VREF in Bandgap circuits in driving display ICs, it is common to use products of A-Si TFT screens, one displaying gray scale voltage differences of about 8 millivolts (mV), and products of Organic Light Emitting Diode (OLED) screens, one displaying gray scale voltage differences of about 1 mV to 3 mV.
When the Bandgap circuit is affected by noise, VREF can shake, the shake of VREF is on an A-Si TFT product, visual effect is difficult to see abnormal, however, on an OLED product, the shake amount of VREF is easily larger than one gray level voltage, and further, the phenomenon of rolling fine transverse lines or shaking fine transverse lines occurs on the OLED product, and further, user experience is reduced.
At present, the current of the band gap circuit can be increased to reduce noise in a relative proportion, however, the power consumption of the band gap circuit can be increased in such a way, the noise interference source is difficult to be simulated and quantified, the difference of different processes is difficult to master, and the mass production risk of OLED products can be improved. In addition, the layout area of the band gap circuit can be increased, so that the band gap circuit is far away from a noise source as far as possible to reduce noise influence, further, the phenomenon of rolling fine cross stripes or shaking fine cross stripes is avoided, and the cost is increased due to the increase of the layout area of the band gap circuit.
In order to solve the above technical problem, to realize anti-interference of band gap circuit, avoid appearing rolling the phenomenon of thin cross grain or shake thin cross grain, promote user experience sense, this application embodiment provides a reference voltage generation circuit, connect bleeder circuit on the output that band gap reference circuit produced reference voltage, so that under the great circumstances of noise, stable reference voltage can be provided by bleeder circuit according to the selection of display effect, thereby need not the overall arrangement area of unlimited increase band gap reference circuit, avoided the influence of noise to band gap reference circuit, thereby avoid appearing rolling the phenomenon of thin cross grain or shake thin cross grain, promote the volume production possibility of relevant electronic product when promoting reference voltage stability.
Fig. 1 is a circuit diagram of a reference voltage generating circuit according to an embodiment of the present application, as shown in fig. 1, the circuit includes: a control unit 1, a bandgap reference circuit 2 and a voltage divider circuit 3.
As shown in fig. 1, the voltage dividing circuit 3 includes a first resistor R1, a second resistor R2 and a zero ohm resistor R0, a common terminal generated by connecting the first resistor R1 and the second resistor R2 in series is connected with one end of the zero ohm resistor R0, the other end of the first resistor R1 is connected with a power supply, the other end of the second resistor R2 is grounded, and the other end of the zero ohm resistor R0 is used as a connection terminal of the voltage dividing circuit 3.
The output end of the band gap reference circuit 2 is connected with the voltage dividing circuit 3 through a controllable switch S, the control unit 1 is respectively connected with the band gap reference circuit 2 and the controllable switch S, and the control unit 1 is used for controlling the input of the enabling end of the band gap reference circuit 2 to be zero and controlling the controllable switch to be closed when the noise is determined to be larger than a preset value so as to generate a reference voltage by the voltage dividing circuit 3.
Further, when it is determined that the noise is not greater than the preset value, the control unit 1 controls the enable terminal input of the Bandgap reference circuit to be one and controls the controllable switch to be turned off, and at this time, the Bandgap reference circuit (Bandgap circuit) 2 inside the chip provides a stable VREF.
It can be understood that zero ohm resistance R0 uses as the wire jumper, reduces the wiring degree of difficulty, and in addition, zero ohm resistance R0 can avoid the emergence of phenomenon such as resonant frequency, simultaneously, avoids going up the excessive current of line, plays fuse protection circuit's effect.
It should be noted that, when the voltage divider circuit is selected to provide VREF with high noise, in order to ensure stability of VREF, the power source connected to the first resistor R1 is selected to provide power source of the Power Management Integrated Circuit (PMIC), and it is understood that, in use of each electronic product, the power source provided by the PMIC is most powerful and stable, so in the embodiment of the present application, the power source connected to the first resistor R1 is preferably the power source provided by the PMIC. It should be noted that, in a specific embodiment, VREF provided by the reference voltage generating circuit may be adjusted according to the ratio of the resistances of the first resistor R1 and the second resistor R2.
In addition, it should be noted that, in order to protect the circuit from being damaged, the reference voltage generating circuit provided in the present application further includes a capacitor C, as shown in fig. 1, one end of the capacitor C is connected to the other end of the zero ohm resistor R0, and the other end is grounded.
In a specific implementation, when the noise ratio is estimated to be large and display abnormality is caused, the enabling end input of the bandgap reference circuit 2 is controlled to be zero, the controllable switch is controlled to be closed, and the stable VREF is generated by the system VCI and the voltage dividing circuit formed by the first resistor R1 and the second resistor R2, so that the bandgap reference circuit 2 is replaced.
The reference voltage generating circuit provided by the embodiment of the application comprises: the control unit, band gap reference circuit and bleeder circuit, bleeder circuit include first resistance, second resistance and zero ohm resistance, and the public end that first resistance and second resistance series connection produced is connected with the one end of zero ohm resistance, and the other end of first resistance is connected with the power, and the other end ground connection of second resistance, the other end of zero ohm resistance is as bleeder circuit's link. The control unit is respectively connected with the band gap reference circuit and the voltage dividing circuit, the output end of the band gap reference circuit is connected with the voltage dividing circuit through the controllable switch, and the control circuit is used for controlling the input of the enabling end of the band gap reference circuit to be zero and controlling the controllable switch to be closed when the noise is determined to be larger than a preset value, so that the voltage dividing circuit can generate the reference voltage. Therefore, according to the technical scheme provided by the application, under the condition of large noise, stable reference voltage can be provided by the voltage dividing circuit according to the display effect, so that the layout area of the band gap reference circuit is not required to be increased in an unlimited manner, the influence of noise on the band gap reference circuit is avoided, the phenomenon of rolling thin transverse lines or shaking thin transverse lines is avoided, the stability of the reference voltage is improved, and meanwhile, the mass production possibility of related electronic products is improved.
In the above embodiments, the reference voltage generating circuit is described in detail, and the present application further provides an embodiment corresponding to a control method of the reference voltage generating circuit, where the method is applied to the reference voltage generating circuit described in the above embodiments, and the method includes: when the noise is determined to be larger than a preset value, the enabling end input of the band gap reference circuit is controlled to be zero, and the controllable switch is controlled to be closed, so that the voltage divider circuit generates the reference voltage.
In addition, the method further comprises the steps of controlling an enable end input of the band gap reference circuit to be one when the noise is not larger than a preset value, and controlling the controllable switch to be turned off.
Since the control method of the reference voltage generating circuit provided in the present application corresponds to the reference voltage generating circuit provided in the above embodiment, the effects are the same, and the description thereof is omitted herein.
The control method of the reference voltage generation circuit provided by the embodiment of the application is applied to the circuit comprising the following steps: the control unit, the test voltage generation circuit of band gap reference circuit and bleeder circuit, wherein, bleeder circuit includes first resistance, second resistance and zero ohm resistance, and the public end that first resistance and second resistance establish ties and produce is connected with the one end of zero ohm resistance, and the other end of first resistance is connected with the power, and the other end ground of second resistance, and the other end of zero ohm resistance is as bleeder circuit's link. The control unit is respectively connected with the band gap reference circuit and the voltage dividing circuit, and the output end of the band gap reference circuit is connected with the voltage dividing circuit through the controllable switch. According to the control method, when the noise is determined to be larger than the preset value, the enabling end input of the band gap reference circuit is controlled to be zero, and the controllable switch is controlled to be closed, so that the voltage divider circuit generates the reference voltage. Therefore, under the condition of large noise, stable reference voltage can be provided by the voltage dividing circuit according to the display effect, so that the layout area of the band gap reference circuit does not need to be increased without an upper limit, the influence of noise on the band gap reference circuit is avoided, the phenomenon of rolling thin transverse lines or shaking thin transverse lines is avoided, the stability of the reference voltage is improved, and meanwhile, the mass production possibility of related electronic products is improved.
In the above embodiments, the control method of the reference voltage generating circuit is described in detail, and the present application further provides a corresponding embodiment of the control device of the reference voltage generating circuit. It should be noted that the present application describes an embodiment of the device portion from two angles, one based on the angle of the functional module and the other based on the angle of the hardware structure.
The control device of the reference voltage generation circuit comprises a control module, wherein the control module is used for controlling the input of the enabling end of the band gap reference circuit to be zero and controlling the controllable switch to be closed when the noise is determined to be larger than a preset value, so that the voltage division circuit generates the reference voltage.
In addition, the control module is also used for controlling the enabling end input of the band gap reference circuit to be one and controlling the controllable switch to be disconnected when the noise is not larger than the preset value.
Since the embodiments of the apparatus portion and the embodiments of the method portion correspond to each other, the embodiments of the apparatus portion are referred to the description of the embodiments of the method portion, and are not repeated herein.
According to the control device of the reference voltage generation circuit, under the condition of large noise, stable reference voltage can be provided by the voltage dividing circuit according to the display effect, so that the layout area of the band gap reference circuit is not required to be increased without an upper limit, the influence of noise on the band gap reference circuit is avoided, the phenomenon of rolling fine transverse lines or shaking fine transverse lines is avoided, the stability of the reference voltage is improved, and meanwhile, the mass production possibility of related electronic products is improved.
Fig. 2 is a block diagram of a control device of a reference voltage generating circuit according to another embodiment of the present application, and as shown in fig. 2, the control device of the reference voltage generating circuit includes: a memory 20 for storing a computer program;
a processor 21 for implementing the steps of the control method of the reference voltage generating circuit as mentioned in the above embodiments when executing a computer program.
The control device of the reference voltage generating circuit provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, or the like.
Processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 may be implemented in hardware in at least one of a digital signal processor (Digital Signal Processor, abbreviated as DSP), a Field programmable gate array (Field-Programmable Gate Array, abbreviated as FPGA), and a programmable logic array (Programmable Logic Array, abbreviated as PLA). The processor 21 may also include a main processor and a coprocessor, the main processor being a processor for processing data in an awake state, also referred to as a central processor (Central Processing Unit, CPU for short); a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with an image processor (Graphics Processing Unit, GPU for short) for rendering and drawing of content required to be displayed by the display screen. In some embodiments, the processor 21 may also include an artificial intelligence (Artificial Intelligence, AI) processor for processing computing operations related to machine learning.
Memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing a computer program 201, which, when loaded and executed by the processor 21, is capable of implementing the relevant steps of the control method of the reference voltage generating circuit disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may further include an operating system 202, data 203, and the like, where the storage manner may be transient storage or permanent storage. The operating system 202 may include Windows, unix, linux, among others. The data 203 may include, but is not limited to, related data and the like involved in a control method of the reference voltage generating circuit.
In some embodiments, the control device of the reference voltage generating circuit may further include a display 22, an input/output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.
It will be appreciated by those skilled in the art that the structure shown in fig. 2 does not constitute a limitation of the control means of the reference voltage generating circuit, and may include more or less components than those illustrated.
The control device of the reference voltage generating circuit provided by the embodiment of the application comprises a memory and a processor, wherein the processor can realize the following method when executing a program stored in the memory: a control method of a reference voltage generating circuit.
According to the control device of the reference voltage generation circuit, under the condition of large noise, stable reference voltage can be provided by the voltage dividing circuit according to the display effect, so that the layout area of the band gap reference circuit is not required to be increased without an upper limit, the influence of noise on the band gap reference circuit is avoided, the phenomenon of rolling thin transverse lines or shaking thin transverse lines is avoided, the stability of the reference voltage is improved, and meanwhile, the mass production possibility of related electronic products is improved.
Finally, the present application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps as described in the method embodiments above.
It will be appreciated that the methods of the above embodiments, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored on a computer readable storage medium. With such understanding, the technical solution of the present application, or a part contributing to the prior art or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, performing all or part of the steps of the method described in the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The reference voltage generating circuit, the control method, the control device and the medium thereof provided by the application are described in detail. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A reference voltage generation circuit, comprising: a control unit, a band gap reference circuit and a voltage dividing circuit;
the voltage dividing circuit comprises a first resistor, a second resistor and a zero ohm resistor, wherein a public end generated by the series connection of the first resistor and the second resistor is connected with one end of the zero ohm resistor, the other end of the first resistor is connected with a power supply, the other end of the second resistor is grounded, and the other end of the zero ohm resistor is used as a connecting end of the voltage dividing circuit;
the output end of the band gap reference circuit is connected with the voltage dividing circuit through a controllable switch, the control unit is respectively connected with the band gap reference circuit and the controllable switch, and the control unit is used for: when the noise is determined to be larger than a preset value, controlling the input of an enabling end of the band gap reference circuit to be zero, and controlling the controllable switch to be closed so as to generate a reference voltage by the voltage dividing circuit; and when the noise is not larger than the preset value, controlling the input of the enabling end of the band gap reference circuit to be one, and controlling the controllable switch to be disconnected.
2. The reference voltage generating circuit according to claim 1, wherein the magnitude of the reference voltage is adjusted according to a ratio of the first resistance and the second resistance.
3. The reference voltage generating circuit according to claim 1, wherein the voltage dividing circuit further comprises a capacitor;
one end of the capacitor is connected with the other end of the zero ohm resistor, and the other end of the capacitor is grounded.
4. A reference voltage generating circuit according to any one of claims 1 to 3, wherein the power supply is a power supply provided by a power management integrated circuit.
5. A control method of a reference voltage generating circuit applied to the reference voltage generating circuit according to any one of claims 1 to 4, characterized by comprising:
when the noise is determined to be larger than a preset value, controlling the input of an enabling end of the band gap reference circuit to be zero, and controlling the controllable switch to be closed so as to generate a reference voltage by the voltage dividing circuit;
and when the noise is not larger than the preset value, controlling the input of the enabling end of the band gap reference circuit to be one, and controlling the controllable switch to be disconnected.
6. A control device of a reference voltage generating circuit, applied to the reference voltage generating circuit according to any one of claims 1 to 4, characterized by comprising:
and the control module is used for controlling the input of the enabling end of the band gap reference circuit to be zero when the noise is larger than the preset value, and controlling the controllable switch to be closed so as to generate the reference voltage by the voltage dividing circuit.
7. A control device of a reference voltage generating circuit, characterized by comprising a memory for storing a computer program;
a processor for implementing the steps of the control method of the reference voltage generating circuit as claimed in claim 5 when executing said computer program.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the control method of the reference voltage generating circuit according to claim 5.
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| CN109164719B (en) * | 2017-06-29 | 2020-08-25 | 中芯国际集成电路制造(上海)有限公司 | Power supply circuit, generation method and control method |
| US10663994B2 (en) * | 2018-03-08 | 2020-05-26 | Macronix International Co., Ltd. | Auto-calibrated bandgap reference |
| CN110121043B (en) * | 2019-06-10 | 2022-04-15 | 北海惠科光电技术有限公司 | Display power supply device and display system |
| CN113608569B (en) * | 2021-08-05 | 2022-09-16 | 广东合科泰实业有限公司 | Display screen driving IC |
| CN217238692U (en) * | 2022-05-13 | 2022-08-19 | 江苏集萃智能集成电路设计技术研究所有限公司 | LCD driving circuit |
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