CN111970005A - Analog-digital conversion circuit control method, device and equipment and analog-digital conversion circuit - Google Patents
Analog-digital conversion circuit control method, device and equipment and analog-digital conversion circuit Download PDFInfo
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- CN111970005A CN111970005A CN202011124102.6A CN202011124102A CN111970005A CN 111970005 A CN111970005 A CN 111970005A CN 202011124102 A CN202011124102 A CN 202011124102A CN 111970005 A CN111970005 A CN 111970005A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
- H03M1/129—Means for adapting the input signal to the range the converter can handle, e.g. limiting, pre-scaling ; Out-of-range indication
Abstract
The invention discloses a control method of an analog-digital conversion circuit, which comprises the steps of receiving a voltage sampling signal; obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold; sending the precision selection signal to a controlled analog-to-digital conversion circuit, and enabling the controlled analog-to-digital conversion circuit to activate a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter. The invention adopts the analog-to-digital converters with different digits, avoids the problem that the power consumption is greatly increased at low voltage when the high-digit analog-to-digital converter is adopted for high precision in the prior art, greatly reduces the power consumption of devices while ensuring the analog-to-digital conversion precision, further saves energy and reduces the cost. The invention also provides an analog-digital conversion circuit control device, equipment, a computer readable storage medium and an analog-digital conversion circuit with the beneficial effects.
Description
Technical Field
The invention relates to the field of electrical energy conservation, in particular to a method, a device and equipment for controlling an analog-to-digital conversion circuit, a computer readable storage medium and the analog-to-digital conversion circuit.
Background
With the development of technology, the more complex the circuitry in the electronic product, the more and more the interaction and mutual conversion between the analog signal and the digital signal are, and what bears this task is the analog-to-digital converter. The circuit for converting an Analog signal into a Digital signal is called an Analog-to-Digital Converter (a/D Converter or ADC), and the a/D conversion is used to convert an Analog signal with continuous time and continuous amplitude into a Digital signal with discrete time and discrete amplitude, so the a/D conversion generally includes 4 processes of sampling, holding, quantizing and encoding. The ADC itself also consumes power, so that with the increasing complexity of the circuit and the ADC in the circuit, the power consumption of the ADC itself becomes a non-negligible part of the circuit.
Therefore, it is an urgent need to solve the problem of how to reduce the power consumption of the analog-to-digital conversion circuit and further achieve the effects of saving energy and reducing cost.
Disclosure of Invention
The invention aims to provide an analog-to-digital conversion circuit control method, an analog-to-digital conversion circuit control device, analog-to-digital conversion equipment, a computer readable storage medium and an analog-to-digital conversion circuit, so as to solve the problem that in the prior art, the analog-to-digital conversion circuit is high in power consumption and further causes high cost.
To solve the above technical problem, the present invention provides a method for controlling an analog-to-digital conversion circuit, including:
receiving a voltage sampling signal;
obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold;
sending the precision selection signal to a controlled analog-to-digital conversion circuit, and enabling the controlled analog-to-digital conversion circuit to activate a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter.
Optionally, in the analog-to-digital conversion circuit control method, the varying threshold includes a single action transform threshold, and obtaining the precision selection signal according to the voltage sampling signal and a preset action transform threshold includes:
judging whether the voltage sampling signal exceeds the single action transformation threshold value;
when the voltage sampling signal exceeds the single action transformation threshold value, obtaining a high-precision selection signal;
and when the voltage sampling signal does not exceed the single action transformation threshold value, obtaining a low-precision selection signal.
Optionally, in the analog-to-digital conversion circuit control method, when the high-precision selection signal is obtained, the sending the precision selection signal to the controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal includes:
and sending the high-precision selection signal to the controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a combined high-precision analog-to-digital converter to perform analog-to-digital conversion according to the high-precision signal, wherein the combined high-precision analog-to-digital converter is an analog-to-digital converter composed of the high-order analog-to-digital converter and the low-order analog-to-digital converter.
Optionally, in the analog-to-digital conversion circuit control method, the varying threshold includes a sleep threshold and a wake-up threshold, and obtaining the precision selection signal according to the voltage sampling signal and a preset varying threshold includes:
receiving a device operating signal from the controlled analog-to-digital conversion circuit;
determining the working state of the high-order analog-to-digital converter through the device working signal;
when the high-order analog-to-digital converter is in an activated state, obtaining the precision selection signal according to the voltage sampling signal and the dormancy threshold value;
and when the high-order analog-to-digital converter is in a standby state, obtaining the precision selection signal according to the voltage sampling signal and the awakening threshold value.
Optionally, in the analog-to-digital conversion circuit control method, the wake-up threshold is higher than the sleep threshold.
An analog-to-digital conversion circuit control apparatus comprising:
the receiving module is used for receiving the voltage sampling signal;
the working precision module is used for obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold value;
the sending module is used for sending the precision selection signal to a controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter.
Optionally, in the analog-to-digital conversion circuit control device, the variation threshold includes a single-action conversion threshold, and the operation precision module includes:
the judging unit is used for judging whether the voltage sampling signal exceeds the single action transformation threshold value or not;
the high-precision unit is used for obtaining a high-precision selection signal when the voltage sampling signal exceeds the single action transformation threshold;
and the low-precision unit is used for obtaining a low-precision selection signal when the voltage sampling signal does not exceed the single action transformation threshold.
An analog-to-digital conversion circuit control device comprising:
a memory for storing a computer program;
a processor for implementing the steps of the analog-to-digital conversion circuit control method as described in any one of the above when the computer program is executed.
A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the analog-to-digital conversion circuit control method as in any one of the above.
An analog-to-digital conversion circuit comprises a low-order analog-to-digital converter, a high-order analog-to-digital converter and a processor;
the bit number of the output signal of the low-order analog-to-digital converter is lower than that of the output signal of the high-order analog-to-digital converter;
the input end of the low-order analog-to-digital converter and the input end of the high-order analog-to-digital converter are connected to the same sampling interface;
the processor is used for determining a precision selection signal according to the output signal of the high-order analog-to-digital converter and/or the output signal of the low-order analog-to-digital converter through a preset variation threshold value, and activating the high-order analog-to-digital converter and/or the low-order analog-to-digital converter to perform analog-to-digital conversion through the precision selection signal.
The analog-digital conversion circuit control method provided by the invention receives a voltage sampling signal; obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold; sending the precision selection signal to a controlled analog-to-digital conversion circuit, and enabling the controlled analog-to-digital conversion circuit to activate a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter. According to the invention, the preliminary judgment of the magnitude of the voltage sampling signal (namely the precision selection signal) is realized through the variable threshold, and the analog-to-digital converters with different digits are selected according to the magnitude of the voltage sampling signal, so that the problem that the power consumption is greatly increased due to the high-digit analog-to-digital converter adopted for high precision in the prior art but the high-digit analog-to-digital converter is used at low voltage is solved, the power consumption of a device is greatly reduced while the analog-to-digital conversion precision is ensured, the energy is further saved, and the cost is reduced. The invention also provides an analog-digital conversion circuit control device, equipment, a computer readable storage medium and an analog-digital conversion circuit with the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of an embodiment of a control method of an analog-to-digital conversion circuit according to the present invention;
fig. 2 is a schematic flow chart of another embodiment of a control method of an analog-to-digital conversion circuit according to the present invention;
FIG. 3 is a flow chart illustrating a control method of an analog-to-digital conversion circuit according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of an embodiment of a control device of an analog-to-digital conversion circuit provided in the present invention;
fig. 5 is a schematic structural diagram of an embodiment of an analog-to-digital conversion circuit provided in the present invention.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the present invention is to provide a method for controlling an analog-to-digital conversion circuit, wherein a flow diagram of a specific embodiment is shown in fig. 1, which is referred to as a first specific embodiment and includes:
s101: a voltage sampling signal is received.
The voltage sampling signal is an analog voltage signal to be converted into a digital signal.
S102: and obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold value.
The variation threshold may be one or more, or other parameters and corresponding rules may be introduced, the precision selection signal is obtained by combining the voltage sampling signal and the variation threshold, for example, a device operating signal of the controlled analog-to-digital conversion circuit may be additionally obtained, and different variation thresholds are allocated according to a device operating condition of the controlled analog-to-digital conversion circuit, so as to determine the precision selection signal. Of course, the variation threshold may be varied according to actual conditions.
S103: sending the precision selection signal to a controlled analog-to-digital conversion circuit, and enabling the controlled analog-to-digital conversion circuit to activate a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter.
The precision selection signal generally comprises a low-precision signal and a high-precision signal, the high-order analog-to-digital converter is activated when the high-precision signal is received, and the low-order analog-to-digital converter is activated when the low-precision signal is received; the high order and the low order refer to the bit number of the analog-to-digital converter, and if the low order analog-to-digital converter is a 2bit analog-to-digital converter, the low order analog-to-digital converter can only output a 00/01/10/11 fourth-order digital signal.
Of course, the precision selection signal may be not only high or low, and may include precision selection of more gears, and the controlled analog-to-digital conversion circuit may also include more than one high-order analog-to-digital converter and one low-order analog-to-digital converter; furthermore, a plurality of analog-to-digital converters can be connected to form a combined analog-to-digital converter to meet the requirements of different precision gears.
In addition, the high-order analog-to-digital converter and the low-order analog-to-digital converter can be respectively connected to different sampling interfaces in a software layer, and the high-order analog-to-digital converter and the low-order analog-to-digital converter are two unrelated analog-to-digital converters, so that the application range of the controlled analog-to-digital conversion circuit is expanded.
The traditional successive approximation ADC always approaches from a fixed initial value, the highest bit which is completely the same is compared each time and needs to be determined again, and the comparison processes waste power consumption. In addition, in the conversion process of the successive approximation ADC, the judgment of the highest bit consumes the most power, and the consumed power is halved when the highest bit is reduced, so that the power consumption of the ADC can be obviously reduced if the comparison process of the high bits is omitted.
The analog-digital conversion circuit control method provided by the invention receives a voltage sampling signal; obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold; sending the precision selection signal to a controlled analog-to-digital conversion circuit, and enabling the controlled analog-to-digital conversion circuit to activate a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter. According to the invention, the preliminary judgment of the magnitude of the voltage sampling signal (namely the precision selection signal) is realized through the variable threshold, and the analog-to-digital converters with different digits are selected according to the magnitude of the voltage sampling signal, so that the problem that the power consumption is greatly increased due to the high-digit analog-to-digital converter adopted for high precision in the prior art but the high-digit analog-to-digital converter is used at low voltage is solved, the power consumption of a device is greatly reduced while the analog-to-digital conversion precision is ensured, the energy is further saved, and the cost is reduced.
On the basis of the first specific embodiment, the variation threshold is further limited to obtain a second specific embodiment, a flow chart of which is shown in fig. 2, and includes:
s201: a voltage sampling signal is received.
S202: and judging whether the voltage sampling signal exceeds the single action transformation threshold value.
S203: and when the voltage sampling signal exceeds the single action transformation threshold value, obtaining a high-precision selection signal.
S204: and when the voltage sampling signal does not exceed the single action transformation threshold value, obtaining a low-precision selection signal.
It should be noted that steps S203 and S204 are only operations in two different cases determined in S202, and are not in sequence.
S205: sending the high-precision selection signal or the low-precision selection signal to a controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter.
In this embodiment, the variation threshold in the first embodiment is further limited to the single operation conversion threshold, that is, the variation threshold includes only one threshold, and switching between low-precision analog-to-digital conversion and high-precision analog-to-digital conversion is performed by determining whether or not the voltage sampling signal exceeds the single operation conversion threshold.
Furthermore, after the high-precision selection signal is obtained, the high-precision selection signal is sent to the controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a combined high-precision analog-to-digital converter to perform analog-to-digital conversion according to the high-precision signal, wherein the combined high-precision analog-to-digital converter is an analog-to-digital converter composed of the high-order analog-to-digital converter and the low-order analog-to-digital converter.
For example, if the high-order analog-to-digital converter is a 12-bit analog-to-digital converter and the low-order analog-to-digital converter is a 2-bit analog-to-digital converter, in order to improve the accuracy, the 12-bit analog-to-digital converter and the 2-bit analog-to-digital converter are connected to obtain a 14-bit analog-to-digital converter, and certainly, a situation that a plurality of low-order analog-to-digital converters are connected to each other may also be included, for example, the high-order analog-to-digital converter 12-bit and the low-order analog-to-digital converter are two 2-bit analog-to-digital converters, and two 2-bit analog-to-digital.
On the basis of the first embodiment, a third embodiment is obtained by further considering the problem of switching between high and low precision, and a flow chart of the third embodiment is shown in fig. 3, and includes:
s301: a voltage sampling signal is received.
S302: receiving a device operating signal from the controlled analog-to-digital conversion circuit.
The device working signal represents the working state of the high-order analog-to-digital converter and the low-order analog-to-digital converter of the controlled analog-to-digital conversion circuit.
Of course, the device operating signal may be received first, and then the voltage acquisition signal may be received, without affecting the effect of the present embodiment.
S303: and determining the working state of the high-order analog-to-digital converter through the device working signal.
The working state of the high-order analog-to-digital converter is divided into an activation state and a standby state.
S304: and when the high-order analog-to-digital converter is in an activated state, obtaining the precision selection signal according to the voltage sampling signal and the dormancy threshold value.
S305: and when the high-order analog-to-digital converter is in a standby state, obtaining the precision selection signal according to the voltage sampling signal and the awakening threshold value.
Furthermore, the wake-up threshold is higher than the sleep threshold to avoid false wake-up or false sleep of the high-order ADC due to transient voltage variation caused by external circuit.
It should be noted that steps S304 and S305 are only two different cases determined in step S303, and there is no precedence order, and the order can be changed freely.
S306: sending the precision selection signal to a controlled analog-to-digital conversion circuit, and enabling the controlled analog-to-digital conversion circuit to activate a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter.
In this embodiment, two thresholds are set according to the operating state of the high-order analog-to-digital conversion circuit, generally speaking, the high-order analog-to-digital converter is in a high-precision operating state of the analog-to-digital conversion circuit in an active state, which is generally a formal operating state of the device, and the high-order analog-to-digital converter is in a sleep state, which is generally a power-on shutdown or sleep state of the device.
The following introduces an analog-to-digital conversion circuit control apparatus provided in an embodiment of the present invention, and the analog-to-digital conversion circuit control apparatus described below and the analog-to-digital conversion circuit control method described above may be referred to correspondingly.
Fig. 4 is a block diagram of a structure of an analog-to-digital conversion circuit control device according to an embodiment of the present invention, and referring to fig. 4, the analog-to-digital conversion circuit control device may include:
a receiving module 100, configured to receive a voltage sampling signal;
the working precision module 200 is configured to obtain a precision selection signal according to the voltage sampling signal and a preset variation threshold;
the sending module 300 is configured to send the precision selection signal to a controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter.
In a preferred embodiment, the variation threshold comprises a single action variation threshold, and the work precision module 200 comprises:
the judging unit is used for judging whether the voltage sampling signal exceeds the single action transformation threshold value or not;
the high-precision unit is used for obtaining a high-precision selection signal when the voltage sampling signal exceeds the single action transformation threshold;
and the low-precision unit is used for obtaining a low-precision selection signal when the voltage sampling signal does not exceed the single action transformation threshold.
As a preferred embodiment, when obtaining the high-precision selection signal, the sending module 300 includes:
and sending the high-precision selection signal to the controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a combined high-precision analog-to-digital converter to perform analog-to-digital conversion according to the high-precision signal, wherein the combined high-precision analog-to-digital converter is an analog-to-digital converter composed of the high-order analog-to-digital converter and the low-order analog-to-digital converter.
As a preferred embodiment, the variation threshold includes a sleep threshold and a wake threshold, and the working accuracy module 200 includes:
receiving a device operating signal from the controlled analog-to-digital conversion circuit;
determining the working state of the high-order analog-to-digital converter through the device working signal;
when the high-order analog-to-digital converter is in an activated state, obtaining the precision selection signal according to the voltage sampling signal and the dormancy threshold value;
and when the high-order analog-to-digital converter is in a standby state, obtaining the precision selection signal according to the voltage sampling signal and the awakening threshold value.
In a preferred embodiment, the wake-up threshold is higher than the sleep threshold.
The analog-to-digital conversion circuit control device provided by the invention is used for receiving a voltage sampling signal through a receiving module 100; the working precision module 200 is configured to obtain a precision selection signal according to the voltage sampling signal and a preset variation threshold; the sending module 300 is configured to send the precision selection signal to a controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter. According to the invention, the preliminary judgment of the magnitude of the voltage sampling signal (namely the precision selection signal) is realized through the variable threshold, and the analog-to-digital converters with different digits are selected according to the magnitude of the voltage sampling signal, so that the problem that the power consumption is greatly increased due to the high-digit analog-to-digital converter adopted for high precision in the prior art but the high-digit analog-to-digital converter is used at low voltage is solved, the power consumption of a device is greatly reduced while the analog-to-digital conversion precision is ensured, the energy is further saved, and the cost is reduced.
The analog-to-digital conversion circuit control device of this embodiment is used to implement the foregoing analog-to-digital conversion circuit control method, and therefore specific implementation of the analog-to-digital conversion circuit control device can be seen in the foregoing embodiments of the analog-to-digital conversion circuit control method, for example, the receiving module 100, the working precision module 200, and the sending module 300 are respectively used to implement steps S101, S102, and S103 in the foregoing analog-to-digital conversion circuit control method, so that the specific implementation thereof can refer to descriptions of corresponding embodiments of each part, and details are not repeated here.
An analog-to-digital conversion circuit control device comprising:
a memory for storing a computer program;
a processor for implementing the steps of the analog-to-digital conversion circuit control method as described in any one of the above when the computer program is executed. The analog-digital conversion circuit control method provided by the invention receives a voltage sampling signal; obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold; sending the precision selection signal to a controlled analog-to-digital conversion circuit, and enabling the controlled analog-to-digital conversion circuit to activate a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter. According to the invention, the preliminary judgment of the magnitude of the voltage sampling signal (namely the precision selection signal) is realized through the variable threshold, and the analog-to-digital converters with different digits are selected according to the magnitude of the voltage sampling signal, so that the problem that the power consumption is greatly increased due to the high-digit analog-to-digital converter adopted for high precision in the prior art but the high-digit analog-to-digital converter is used at low voltage is solved, the power consumption of a device is greatly reduced while the analog-to-digital conversion precision is ensured, the energy is further saved, and the cost is reduced.
A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the analog-to-digital conversion circuit control method as in any one of the above. The analog-digital conversion circuit control method provided by the invention receives a voltage sampling signal; obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold; sending the precision selection signal to a controlled analog-to-digital conversion circuit, and enabling the controlled analog-to-digital conversion circuit to activate a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter. According to the invention, the preliminary judgment of the magnitude of the voltage sampling signal (namely the precision selection signal) is realized through the variable threshold, and the analog-to-digital converters with different digits are selected according to the magnitude of the voltage sampling signal, so that the problem that the power consumption is greatly increased due to the high-digit analog-to-digital converter adopted for high precision in the prior art but the high-digit analog-to-digital converter is used at low voltage is solved, the power consumption of a device is greatly reduced while the analog-to-digital conversion precision is ensured, the energy is further saved, and the cost is reduced.
The present invention further provides an analog-to-digital conversion circuit, a schematic structural diagram of one embodiment of which is shown in fig. 5, and the cost of which is a fifth embodiment, including a low-order analog-to-digital converter 01, a high-order analog-to-digital converter 02 and a processor 03;
the bit number of the output signal of the low-order analog-to-digital converter 01 is lower than that of the output signal of the high-order analog-to-digital converter 02;
the input end of the low-order analog-to-digital converter 01 and the input end of the high-order analog-to-digital converter 02 are connected to the same sampling interface;
the processor 03 is configured to determine a precision selection signal according to the output signal of the high-order analog-to-digital converter 02 and/or the output signal of the low-order analog-to-digital converter 01 through a preset variation threshold, and activate the high-order analog-to-digital converter 02 and/or the low-order analog-to-digital converter 01 to perform analog-to-digital conversion through the precision selection signal.
Furthermore, the analog-to-digital conversion circuit comprises more than one low-order analog-to-digital converter 01 and one high-order analog-to-digital converter 02, and different low-order analog-to-digital converters 01 and different high-order analog-to-digital converters 02 can be connected together according to the precision selection signal to form a combined analog-to-digital converter with corresponding precision.
In addition, the high-order analog-to-digital converter 02 and the low-order analog-to-digital converter 01 can be respectively connected to different sampling interfaces in a software layer, and at this time, the high-order analog-to-digital converter 02 and the low-order analog-to-digital converter 01 are two unrelated analog-to-digital converters, so that the application range of the analog-to-digital conversion circuit is expanded.
It should be noted that the low-order adc 01 and the high-order adc 02 in the present invention only represent the number of bits between them, and there is no specific parameter limitation, for example, in an application scenario, the low-order adc 01 is 2 bits, and the high-order adc 02 is 8 bits; in another application scenario, the low-side adc 01 may be 12 bits, and the high-side adc 02 may be 24 bits.
The analog-to-digital conversion circuit provided by the invention comprises a low-order analog-to-digital converter 01, a high-order analog-to-digital converter 02 and a processor 03; the bit number of the output signal of the low-order analog-to-digital converter 01 is lower than that of the output signal of the high-order analog-to-digital converter 02; the input end of the low-order analog-to-digital converter 01 and the input end of the high-order analog-to-digital converter 02 are connected to the same sampling interface; the processor 03 is configured to determine a precision selection signal according to the output signal of the high-order analog-to-digital converter 02 and/or the output signal of the low-order analog-to-digital converter 01 through a preset variation threshold, and activate the high-order analog-to-digital converter 02 and/or the low-order analog-to-digital converter 01 to perform analog-to-digital conversion through the precision selection signal. According to the invention, the preliminary judgment of the magnitude of the voltage sampling signal (namely the precision selection signal) is realized through the variable threshold, and the analog-to-digital converters with different digits are selected according to the magnitude of the voltage sampling signal, so that the problem that the power consumption is greatly increased due to the high-digit analog-to-digital converter adopted for high precision in the prior art but the high-digit analog-to-digital converter is used at low voltage is solved, the power consumption of a device is greatly reduced while the analog-to-digital conversion precision is ensured, the energy is further saved, and the cost is reduced.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is to be noted that, in the present 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The detailed description of the control method, device, equipment, computer readable storage medium and analog-to-digital conversion circuit provided by the invention is provided above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A method for controlling an analog-to-digital conversion circuit, comprising:
receiving a voltage sampling signal;
obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold;
sending the precision selection signal to a controlled analog-to-digital conversion circuit, and enabling the controlled analog-to-digital conversion circuit to activate a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter.
2. The method as claimed in claim 1, wherein the varying threshold comprises a single action transform threshold, and the obtaining the precision selection signal according to the voltage sampling signal and a predetermined action transform threshold comprises:
judging whether the voltage sampling signal exceeds the single action transformation threshold value;
when the voltage sampling signal exceeds the single action transformation threshold value, obtaining a high-precision selection signal;
and when the voltage sampling signal does not exceed the single action transformation threshold value, obtaining a low-precision selection signal.
3. The method as claimed in claim 2, wherein when the high-precision selection signal is obtained, the sending the precision selection signal to the controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates the corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal comprises:
and sending the high-precision selection signal to the controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a combined high-precision analog-to-digital converter to perform analog-to-digital conversion according to the high-precision signal, wherein the combined high-precision analog-to-digital converter is an analog-to-digital converter composed of the high-order analog-to-digital converter and the low-order analog-to-digital converter.
4. The method as claimed in claim 1, wherein the variation threshold comprises a sleep threshold and a wake-up threshold, and the obtaining the precision selection signal according to the voltage sampling signal and a predetermined variation threshold comprises:
receiving a device operating signal from the controlled analog-to-digital conversion circuit;
determining the working state of the high-order analog-to-digital converter through the device working signal;
when the high-order analog-to-digital converter is in an activated state, obtaining the precision selection signal according to the voltage sampling signal and the dormancy threshold value;
and when the high-order analog-to-digital converter is in a standby state, obtaining the precision selection signal according to the voltage sampling signal and the awakening threshold value.
5. The analog-to-digital conversion circuit control method of claim 4, wherein the wake-up threshold is higher than the sleep threshold.
6. An analog-to-digital conversion circuit control apparatus, comprising:
the receiving module is used for receiving the voltage sampling signal;
the working precision module is used for obtaining a precision selection signal according to the voltage sampling signal and a preset variation threshold value;
the sending module is used for sending the precision selection signal to a controlled analog-to-digital conversion circuit, so that the controlled analog-to-digital conversion circuit activates a corresponding analog-to-digital converter to perform analog-to-digital conversion according to the precision selection signal; the controlled analog-to-digital conversion circuit comprises a high-order analog-to-digital converter and a low-order analog-to-digital converter.
7. The analog-to-digital conversion circuit control device of claim 6, wherein the variation threshold comprises a single-action variation threshold, and the operation precision module comprises:
the judging unit is used for judging whether the voltage sampling signal exceeds the single action transformation threshold value or not;
the high-precision unit is used for obtaining a high-precision selection signal when the voltage sampling signal exceeds the single action transformation threshold;
and the low-precision unit is used for obtaining a low-precision selection signal when the voltage sampling signal does not exceed the single action transformation threshold.
8. An analog-to-digital conversion circuit control device characterized by comprising:
a memory for storing a computer program;
a processor for implementing the steps of the analog-to-digital conversion circuit control method according to any one of claims 1 to 5 when executing said computer program.
9. A computer-readable storage medium, characterized in that a computer program is stored thereon, which, when being executed by a processor, implements the steps of the analog-to-digital conversion circuit control method according to any one of claims 1 to 5.
10. An analog-to-digital conversion circuit is characterized by comprising a low-order analog-to-digital converter, a high-order analog-to-digital converter and a processor;
the bit number of the output signal of the low-order analog-to-digital converter is lower than that of the output signal of the high-order analog-to-digital converter;
the input end of the low-order analog-to-digital converter and the input end of the high-order analog-to-digital converter are connected to the same sampling interface;
the processor is used for determining a precision selection signal according to the output signal of the high-order analog-to-digital converter and/or the output signal of the low-order analog-to-digital converter through a preset variation threshold value, and activating the high-order analog-to-digital converter and/or the low-order analog-to-digital converter to perform analog-to-digital conversion through the precision selection signal.
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| CN202011124102.6A CN111970005A (en) | 2020-10-20 | 2020-10-20 | Analog-digital conversion circuit control method, device and equipment and analog-digital conversion circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113126670A (en) * | 2021-03-31 | 2021-07-16 | 武汉益邦汽车技术有限公司 | Control method and system for LPG vaporizing device |
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