CN111257786A - Working current self-checking circuit and method and electronic equipment - Google Patents
Working current self-checking circuit and method and electronic equipment Download PDFInfo
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- CN111257786A CN111257786A CN202010120882.0A CN202010120882A CN111257786A CN 111257786 A CN111257786 A CN 111257786A CN 202010120882 A CN202010120882 A CN 202010120882A CN 111257786 A CN111257786 A CN 111257786A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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Abstract
The invention provides a working current self-checking circuit, a working current self-checking method and electronic equipment, which are used for solving the problems of low efficiency and high cost of working current detection of a power supply. This scheme includes: the device comprises a module to be detected, a switch control module and a current detection module, wherein the switch control module is used for controlling the module to be detected to be directly conducted with a signal input end, or controlling the module to be detected to be conducted with the signal input end through a sampling resistor, and the current detection module is used for detecting the current value passing through the module to be detected when the module to be detected is electrically connected with the signal input end through the sampling resistor. The scheme can realize the detection of the working current of the module to be detected by detecting the current of the sampling resistor. And the sampling resistor is connected between the module to be tested and the signal input end, so that the normal work of the module to be tested is not influenced in the detection process. In addition, the scheme directly utilizes the electric signal provided by the signal input end, does not need to additionally adjust voltage, has high detection efficiency, does not need additional power supply equipment, and reduces the cost.
Description
Technical Field
The invention relates to the field of current detection, in particular to a working current self-checking circuit and method and electronic equipment.
Background
In the development process of electronic products such as mobile phones, it is often necessary to decompose the current of each power supply. In the prior art, the mode of irritating the power outward can be adopted to detect power supply operating current, but this kind of mode only is applicable to the unchangeable power of system operating voltage, and detection efficiency is low moreover, need set up suitable voltage to every way power among the practical application process and can detect, and the cost is higher.
How to detect the working current of the power supply with low cost and high efficiency is the technical problem to be solved by the application.
Disclosure of Invention
The embodiment of the application aims to provide a working current self-checking circuit, a working current self-checking method and electronic equipment, and aims to solve the problems of low efficiency and high cost of working current detection of a power supply.
In a first aspect, an operating current self-checking circuit is provided, including:
the first end of the module to be tested is electrically connected with the signal input end of the circuit, and the second end of the module to be tested is electrically connected with the load of the circuit;
the switch control module is connected between the first end of the module to be tested and the signal input end and is used for controlling the first end of the module to be tested to be directly conducted with the signal input end or controlling the first end of the module to be tested to be conducted with the signal input end through a sampling resistor;
and the current detection module is connected with the two ends of the sampling resistor in parallel and used for detecting the current value of the module to be detected when the first end of the module to be detected is connected with the signal input end through the sampling resistor.
In a second aspect, there is provided an operating current self-checking method applied to the circuit in the first aspect, including:
the method comprises the steps that a sampling resistor is connected between a signal input end and a module to be tested through a switch control module, so that a first end of the module to be tested is conducted with the signal input end through the sampling resistor;
after the current value of the current detection modules connected in parallel at the two ends of the sampling resistor is stable, the switch control module controls the electric signal input by the signal input end to flow to the module to be detected through the sampling resistor;
and determining the working current of the module to be detected according to the current value of the current detection module.
In a third aspect, an electronic device is provided, including:
the signal access module accesses the sampling resistor between the signal input end and the module to be tested through the switch control module, so that the first end of the module to be tested is conducted with the signal input end through the sampling resistor;
the conduction control module controls the electric signal input by the signal input end to flow to the module to be tested through the sampling resistor by the switch control module after the current value of the current detection modules connected in parallel to the two ends of the sampling resistor is stable;
and the current determining module is used for determining the working current of the module to be detected according to the current value of the current detecting module.
In a fourth aspect, a mobile terminal is provided, the mobile terminal comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the second aspect.
In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the method according to the second aspect.
The circuit provided by the application comprises: the device comprises a module to be detected, a switch control module and a current detection module, wherein the switch control module is used for controlling the module to be detected to be directly electrically connected with a signal input end, or controlling the module to be detected to be electrically connected with the signal input end through a sampling resistor, and the current detection module is used for detecting the current value passing through the module to be detected when the module to be detected is conducted with the signal input end through the sampling resistor. Through the circuit that this application provided, can realize the detection to module operating current that awaits measuring through the electric current that detects sampling resistor. And the sampling resistor is connected between the module to be tested and the signal input end, so that the normal work of the module to be tested is not influenced in the detection process. In addition, this scheme directly utilizes the signal of telecommunication that signal input end provided, need not additionally to adjust voltage again, and detection efficiency is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1a is one of the schematic circuit diagrams of an operating current self-test circuit according to an embodiment of the present invention;
FIG. 1b is a second schematic circuit diagram of an operating current self-test circuit according to an embodiment of the present invention;
FIG. 1c is a third schematic circuit diagram of an operating current self-test circuit according to an embodiment of the present invention;
FIG. 2 is a fourth schematic circuit diagram of an operating current self-test circuit according to an embodiment of the present invention;
FIG. 3 is a fifth schematic circuit diagram of a self-checking circuit for operating current according to an embodiment of the present invention;
FIG. 4 is a sixth schematic circuit diagram of an operating current self-test circuit according to an embodiment of the present invention;
FIG. 5 is a flow chart of a method for self-checking a working current according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an electronic device of the present application;
fig. 7 is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present 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 reference numbers in the present application are only used for distinguishing the steps in the scheme and are not used for limiting the execution sequence of the steps, and the specific execution sequence is described in the specification.
In order to solve the problems existing in the prior art, as shown in fig. 1a, the present solution provides an operating current self-checking circuit, including:
the first end a of the module to be tested is electrically connected with the signal input end of the circuit, and the second end b of the module to be tested is electrically connected with the load of the circuit;
the switch control module is connected between the first end a of the module to be tested and the signal input end and is used for controlling the first end a of the module to be tested to be directly conducted with the signal input end or controlling the first end a of the module to be tested to be conducted with the signal input end through a sampling resistor R;
and the current detection module is connected with the two ends of the sampling resistor R in parallel and used for detecting the current value of the module to be detected when the first end of the module to be detected is connected with the signal input end through the sampling resistor R.
In this scheme, the module under test may be a module that needs to be monitored for current in the electronic device, and the module under test may include one or more electronic devices. Optionally, as shown in fig. 1a, the switch control module includes a control switch and a sampling resistor, where a first end of the control switch is electrically connected to a signal input end of the circuit, a second end of the control switch is electrically connected to a load of the circuit, the control switch is configured to control the first end of the module to be tested to be directly conducted to the signal input end when the control switch is turned on, and the control switch is configured to control the first end of the module to be tested to be conducted to the signal input end through the sampling resistor when the control switch is turned off; the sampling resistor is connected in parallel at two ends of the control switch.
In fig. 1a, the switch control module switches the form of electrical connection between the module to be tested and the signal input terminal through a switch. When a switch in the switch control module is closed, the signal input end is directly connected with the module to be tested, the module to be tested can work under the driving of the signal input end, and an electric signal reaches the module to be tested through the signal input end and the closed switch in the switch control module and then reaches a load through the module to be tested. When a switch in the switch control module is switched off, a sampling resistor is connected in series between the signal input end and the module to be tested, and an electric signal reaches the module to be tested from the signal input end through the sampling resistor in the switch control module and then reaches a load through the module to be tested.
When the switch control module controls the module to be tested to be electrically connected with the signal input end through the sampling resistor, the current passing through the sampling resistor is the same as the current passing through the module to be tested, and the current detection modules connected with the two ends of the sampling resistor in parallel can detect the current value passing through the sampling resistor so as to determine the current value passing through the module to be tested.
It should be noted that the switch control module shown in the figure includes a sampling resistor and a switch, and the switch shown in the figure is in a single-pole single-throw form, and specifically, other forms of switches may also be adopted according to actual requirements. Besides the switches shown in the figure, the switch control module may also include other switches, for example, a switch connected in series with the sampling resistor is disposed on the branch where the sampling resistor is located, so as to improve controllability of the input electrical signal. In addition to this, the switch control module may further include other electronic devices, such as a chip for controlling the opening and closing of the switch, a timer for timing control of the switch, and the like. The sampling resistor in the circuit can be a precise resistor with a smaller resistance value, or a resistor with an adjustable resistance value can be selected to improve the accuracy of the self-checking current.
Based on the circuit provided in the foregoing embodiment, optionally, as shown in fig. 1b, the switch control module includes:
first detection switch M1Is connected to the control switch M3Between the first end of the sampling resistor R and the first end of the sampling resistor R;
second detection switch M2Is connected to the control switch M3And a second end of the sampling resistor R;
the switch control module is used for:
at the control switch M3In the closed state, the first detection switch M is controlled1And the second detection switch M2After closing, control theSystem switch M3And switching off to control the first end of the module to be tested to be conducted with the signal input end through the sampling resistor R.
The first end of the control switch is the end of the control switch connected with the signal input end, and the second end of the control switch is the end of the control switch connected with the module to be tested. Based on the circuit shown in fig. 1b, in this embodiment, under the condition that the control switch is closed, the electrical signal input by the signal input end is conducted to the module to be tested through the control switch, and at this time, the switch control module controls the first detection switch and the second detection switch to be closed, so as to connect the sampling resistor to the two ends of the control switch in parallel, and at this time, the electrical signal input by the signal input end is still conducted to the module to be tested through the control switch. After the first detection switch and the second detection switch are closed, the switch control module controls the control switches to be switched off, so that the signal input end is switched on to the module to be detected through the first detection switch, the sampling resistor and the second detection switch. At the moment, the module to be tested and the sampling resistor are in a series connection relationship, and the current of the module to be tested can be obtained by detecting the current of the sampling resistor through the current detection module.
Through the circuit that this embodiment provided, switch control module can connect in parallel at the control switch both ends with sampling resistance earlier, breaks off control switch again afterwards, can guarantee that signal input part lasts and provides the signal of telecommunication to the module that awaits measuring, avoids causing the condition of short duration power failure when switching the route, and then guarantees that the module that awaits measuring lasts normal work. The circuit provided by the embodiment detects the current of the module to be tested, and the normal operation of the module to be tested cannot be influenced.
Fig. 1c is a working current self-checking circuit according to an embodiment of the present application, in which a signal input terminal, a module to be tested, and a load are the same as those of the electronic component shown in fig. 1 a. The switch control module in fig. 1c is shown in a dashed box and comprises a resistor R, a current detection module connected in parallel on both sides of the circuit R, and a switch Z1And switch Z2. Switch Z in the figure1And switch Z2When the two are all closed upwards, the signal input end is directly communicated with the module to be tested, and when a switch Z in the figure is closed1And switch Z2When the two are all closed downwards, the two are closed downwards,the signal input end is communicated with the module to be tested through a resistor R. In the circuit shown in FIG. 1c, the switch Z can be controlled1And switch Z2And controlling the branch of the access circuit so as to control the signal input end to be directly communicated with the module to be tested through the switch control module, or controlling the signal input end to be communicated with the module to be tested through the resistor R.
Through the circuit that this application provided, can realize the detection to module operating current that awaits measuring through the electric current that detects sampling resistor. And the sampling resistor is connected between the module to be tested and the signal input end, so that the normal work of the module to be tested is not influenced in the detection process. In addition, this scheme directly utilizes the signal of telecommunication that signal input end provided, need not additionally to adjust voltage again, and detection efficiency is high.
Based on the circuit provided in the foregoing embodiment, optionally, the module to be tested includes a low dropout Regulator (LDO) and/or a Direct-Direct Current (DC-DC) converter.
Referring to fig. 1a, the module under test in the figure may be a low dropout regulator, or the module under test in the figure may be a dc-dc voltage converter. Taking the low dropout regulator as an example, when the self-checking current is not needed, the switch closing electric signal in the switch control module reaches the low dropout regulator through the closed switch in the switch control module from the signal input end, and then reaches the load, and the module to be tested and the load can work normally under the driving of the input electric signal. When the self-checking current is needed, a switch in the switch control module is switched off, an electric signal provided by the signal input end reaches the module to be tested through a sampling resistor in the switch control module, and then reaches the load, and the module to be tested and the load can normally work under the driving of the input electric signal. Meanwhile, the current detection modules connected in parallel at two ends of the sampling resistor detect the current passing through the sampling resistor, so that the current passing through the module to be detected is determined.
Since the power of the low dropout regulator and the power of the dc-dc voltage converter are different, the low dropout regulator and the dc-dc voltage converter need to be driven by different electrical signals. Therefore, when the module to be tested comprises the low dropout regulator and the dc-dc voltage converter, the circuit may comprise two different signal input terminals for providing driving electrical signals for the low dropout regulator and the dc-dc voltage converter, respectively, so that the low dropout regulator and the dc-dc voltage converter both operate at normal operating voltages.
Optionally, referring to fig. 2, the module to be tested includes: the low-dropout linear regulator is electrically connected with the first signal input end at the first end c and the first end g of the load at the second end d, and the direct current-direct current voltage converter is electrically connected with the second signal input end at the first end e and the second end h of the load at the second end f;
the switch control module is used for controlling the first end c of the low dropout linear regulator to be electrically connected with the first signal input end through a sampling resistor R, and simultaneously controlling the first end e of the direct current-direct current voltage converter to be directly and electrically connected with the second signal input end, or is used for controlling the first end e of the direct current-direct current voltage converter to be electrically connected with the second signal input end through the sampling resistor R, and simultaneously controlling the first end c of the low dropout linear regulator to be directly and electrically connected with the first signal input end;
the current detection module is used for detecting the current value passing through the low dropout regulator when the first end c of the low dropout regulator is electrically connected with the first signal input end through a sampling resistor R;
the current detection module is used for detecting the current value passing through the DC-DC voltage converter when the first end e of the DC-DC voltage converter is electrically connected with the second signal input end through the sampling resistor R.
Optionally, referring to fig. 2, the switch control module includes:
a first switch S1 having a first terminal i electrically connected to the first signal input terminal and a second terminal j electrically connected to the first terminal c of the low dropout regulator;
a second switch S2 having a first terminal k electrically connected to the second signal input terminal and a second terminal l electrically connected to the first terminal e of the dc-dc voltage converter;
a third switch S3 having a first terminal m electrically connected to the first signal input terminal, a second terminal n electrically connected to the second signal input terminal, and a movable terminal o electrically connected to the first terminal of the sampling resistor R, wherein the movable terminal o of the third switch S3 is used to overlap with the first terminal m or the second terminal n of the third switch S3;
the first end p is electrically connected with the first end c of the low dropout regulator, the second end q is electrically connected with the first end e of the direct current-direct current voltage converter, the movable end R is electrically connected with the second end of the sampling resistor R, and the movable end R of the fourth switch S4 is used for being lapped with the first end p or the second end q of the fourth switch S4.
In the circuit shown in fig. 2, the first switch and the second switch are single-pole single-throw switches, and the third switch and the fourth switch are single-pole double-throw switches, but actually, other types of switches may be selected according to the requirements.
The first signal input end provides an electric signal for driving the low dropout linear regulator, and the second signal input end provides an electric signal for driving the direct current-direct current voltage converter. When the low dropout linear regulator and the direct current-direct current voltage converter work normally, the first switch and the second switch are closed, and the third switch and the fourth switch are opened. At this time, the input electrical signal provided by the first signal input end reaches the low dropout regulator through the closed first switch, and further reaches the load. The input electrical signal provided by the second signal input terminal reaches the dc-dc voltage converter through the closed second switch and further reaches the load.
When the current needs to be self-checked, the sampling resistor is connected in parallel to two sides of the switch of the branch to be detected through the third switch and the fourth switch, and the current of the module to be detected on the branch can be detected through the current detection module by disconnecting the switch in the branch. For example, in the circuit shown in fig. 2, when the current of the low dropout regulator is detected, the movable end o of the third switch is controlled to be overlapped with the first end m of the third switch, and the movable end r of the fourth switch is controlled to be overlapped with the first end p of the fourth switch, at this time, the sampling resistor is connected in parallel with two ends of the first switch, after the first switch is turned off, the input electrical signal provided by the first signal input end reaches the low dropout regulator through the sampling resistor, and then reaches the load, at this time, the sampling resistor and the low dropout regulator are in a series relationship, and the current detection module can determine the current passing through the low dropout regulator according to the current passing through the sampling resistor, thereby realizing self-detection of the current of the module to be detected.
Similarly, when the current of the DC-DC voltage converter is detected, the movable end o of the third switch is controlled to be lapped with the second end n of the third switch, the movable end r of the fourth switch is controlled to be lapped with the second end q of the fourth switch, the sampling resistor is connected in parallel with the two ends of the second switch at the moment, after the second switch is disconnected, the input electric signal provided by the second signal input end reaches the DC-DC voltage converter through the sampling resistor and further reaches a load, the sampling resistor and the DC-DC voltage converter are in series connection at the moment, the current detection module can determine the current passing through the DC-DC voltage converter according to the current passing through the sampling resistor, and therefore self-detection of the current of the module to be detected is achieved.
Based on the circuit provided in the foregoing embodiment, optionally, the switch control module is configured to:
in the third switch S3And the third switch S3Is lapped, and the fourth switch S4And the movable end r and the fourth switch S4After the first end p is lapped, the first switch S is controlled1Disconnecting;
in the third switch S3And the third switch S3Is lapped with the second end n, and the fourth switch S4And the movable end r and the fourth switch S4After the second end q is lapped, controlling the second switch S2And (5) disconnecting.
Based on the circuit structure shown in fig. 2, in practical application, the control chip can control the on and off of the first switch, the second switch, the third switch and the fourth switch, so as to control whether the input current passes through the sampling resistor. Although the chip can send control signals to the switches at the same time, the response speeds of different switches may differ due to the influence of the circuit and the switch properties. Taking the detection of the current of the low dropout regulator as an example, the chip can control the first switch to be turned off at the same time, and the sampling resistor is connected in parallel to two ends of the first switch by controlling the third switch and the fourth switch. However, if the response speed of the first switch is fast and the response speeds of the third switch and the fourth switch are slow, the first switch is opened first, but the third switch and the fourth switch are not closed. At this time, no path exists between the first signal input terminal and the low dropout regulator, which may cause the low dropout regulator to stop working for a short time.
In order to avoid the problem, in the circuit provided by the application, the third switch and the fourth switch are controlled to connect the sampling resistor in parallel at a required position, and then the originally closed switch is disconnected, so that a path is ensured to exist between the signal input end and the module to be tested, and the normal work of the module to be tested is prevented from being influenced in the self-checking current process.
In addition, the circuit can also comprise more modules to be tested, each module to be tested corresponds to one signal input end, and a switch is connected in series between the corresponding signal input end and the module to be tested. The third switch and the fourth switch can comprise more fixed ends, when a certain module to be detected needs to be subjected to self-current detection, the third switch and the fourth switch are controlled to connect the sampling resistor in parallel on two sides of the switch of the branch circuit to be detected, and the switch of the branch circuit is disconnected, so that the current self-detection can be realized through the current detection module.
Based on the circuit provided in the above embodiment, optionally, referring to fig. 1a, the current detection module is configured to detect a voltage difference between two ends of the sampling resistor R when the first end a of the module to be tested is electrically connected to the signal input end through the sampling resistor R, and calculate a current value passing through the module to be tested according to the voltage difference and a resistance value of the sampling resistor.
In the circuit that this application provided, current detection module connects in parallel at sampling resistance both ends, can be used for monitoring the voltage at sampling resistance both ends to calculate the voltage difference at sampling resistance both ends. And then, according to the voltage difference between the two ends of the sampling resistor and the resistance value of the sampling resistor, the current value passing through the sampling resistor can be calculated based on ohm's law, and the current value passing through the sampling resistor is the current value passing through the module to be detected because the sampling resistor and the module to be detected are in series connection. The circuit provided by the application can accurately detect the current of the module to be detected, and improves the flexibility and accuracy of the self-checking current.
Based on the circuit provided in the foregoing embodiment, optionally, as shown in fig. 3, the circuit provided in this application further includes:
a first capacitor C with a first electrode plate electrically connected with the second end d of the low dropout regulator and a second electrode plate grounded1；
An inductor L, a first end of which is electrically connected with the second end f of the DC-DC voltage converter, and a second end of which is electrically connected with the second end h of the load;
a second capacitor C with a first electrode plate electrically connected with the second end of the inductor and a second electrode plate grounded2。
In fig. 3, the first plate of the first capacitor is an upper plate in the figure, the second plate is a lower plate in the figure, the first plate of the second capacitor is an upper plate in the figure, and the second plate is a lower plate in the figure. The first capacitor may be an output capacitor of the low dropout regulator, the second capacitor may be an output capacitor of the dc-dc voltage converter, and the inductor may be an output inductor of the dc-dc voltage converter. The capacitance value of the first capacitor can be determined according to the actual condition of the low dropout regulator, and the capacitance value of the second capacitor can be determined according to the actual condition of the direct current-direct current voltage converter.
Based on the circuit provided in the foregoing embodiment, optionally, as shown in fig. 4, the circuit provided in this application further includes:
and the register is electrically connected with the current detection module and is used for storing the current value detected by the current detection module and passing through the module to be detected.
In practical application, the circuit provided by the scheme can periodically self-check the current of the module to be tested, and record the current value obtained by self-checking in the register. For example, the current value passing through the module to be tested is self-checked every ten minutes and recorded in the register, and then the current values of three modules to be tested at different times are recorded in the register thirty minutes later. The staff can call and check the current values recorded in the register, so that the working states of the module to be tested at different moments are known.
When the module under test includes a plurality of sub-modules, for example, the module under test includes a low dropout regulator and a dc-dc voltage converter, the current detection module may periodically detect the sub-modules in the module under test. For example, the current self-test is performed every ten minutes, and the current of the low dropout linear regulator is detected first when the current self-test is performed, and then the current of the dc-dc voltage converter is detected. The register can record the self-checking current value of the low dropout linear regulator and the self-checking current value of the DC-DC voltage converter respectively.
Through the circuit that this application provided, can carry out the record to the current value that self-checking obtained to can transfer according to actual demand and look over the module that awaits measuring at the current value of historical different moments, and then confirm the operating condition of module that awaits measuring at different moments.
In order to solve the problems in the prior art, the present invention provides a method for self-checking a working current, which is applied to the circuit described in the above embodiment, as shown in fig. 5, and includes the following steps:
s11: the method comprises the steps that a sampling resistor is connected between a signal input end and a module to be tested through a switch control module, so that a first end of the module to be tested is conducted with the signal input end through the sampling resistor;
s12: after the current value of the current detection modules connected in parallel at the two ends of the sampling resistor is stable, the switch control module controls the electric signal input by the signal input end to flow to the module to be detected through the sampling resistor;
s13: and determining the working current of the module to be detected according to the current value of the current detection module.
In the embodiment of the invention, the working current of the module to be detected is detected by detecting the current of the sampling resistor. And in addition, the normal work of the module to be detected is not influenced in the detection process. In addition, the scheme can directly utilize the electric signal provided by the signal input end, does not need to additionally adjust the voltage, and has high detection efficiency.
In order to solve the problems in the prior art, as shown in fig. 6, the present application provides an electronic device 20, including:
the signal access module 21 is used for accessing the sampling resistor between the signal input end and the module to be tested through the switch control module, so that the first end of the module to be tested is conducted with the signal input end through the sampling resistor;
the conduction control module 22 controls the electric signal input by the signal input end to flow to the module to be tested through the sampling resistor by the switch control module after the current value of the current detection modules connected in parallel to the two ends of the sampling resistor is stable;
and the current determining module 23 is used for determining the working current of the module to be detected according to the current value of the current detecting module.
In the embodiment of the invention, the working current of the module to be detected is detected by detecting the current of the sampling resistor. And in addition, the normal work of the module to be detected is not influenced in the detection process. In addition, the scheme can directly utilize the electric signal provided by the signal input end, does not need to additionally adjust the voltage, and has high detection efficiency.
Figure 7 is a schematic diagram of a hardware configuration of a mobile terminal implementing various embodiments of the present invention,
the mobile terminal 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, a power supply 711, and the like. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 7 is not intended to be limiting of mobile terminals, and that a mobile terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the mobile terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
The processor 710 is configured to access a sampling resistor between a signal input end and a module to be tested through a switch control module, so that a first end of the module to be tested is conducted with the signal input end through the sampling resistor; after the current value of the current detection modules connected in parallel at the two ends of the sampling resistor is stable, the switch control module controls the electric signal input by the signal input end to flow to the module to be detected through the sampling resistor; and determining the working current of the module to be detected according to the current value of the current detection module.
In the embodiment of the invention, the working current of the module to be detected is detected by detecting the current of the sampling resistor. And in addition, the normal work of the module to be detected is not influenced in the detection process. In addition, the scheme can directly utilize the electric signal provided by the signal input end, does not need to additionally adjust the voltage, and has high detection efficiency.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 710; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 701 may also communicate with a network and other devices through a wireless communication system.
The mobile terminal provides the user with wireless broadband internet access via the network module 702, such as helping the user send and receive e-mails, browse web pages, and access streaming media.
The audio output unit 703 may convert audio data received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Also, the audio output unit 703 may also provide audio output related to a specific function performed by the mobile terminal 700 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.
The input unit 704 is used to receive audio or video signals. The input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics processor 7041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 706. The image frames processed by the graphic processor 7041 may be stored in the memory 709 (or other storage medium) or transmitted via the radio unit 701 or the network module 702. The microphone 7042 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 701 in case of a phone call mode.
The mobile terminal 700 also includes at least one sensor 705, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 7061 and/or a backlight when the mobile terminal 700 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 705 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.
The display unit 706 is used to display information input by the user or information provided to the user. The Display unit 706 may include a Display panel 7061, and the Display panel 7061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 707 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 7071 (e.g., operations by a user on or near the touch panel 7071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 7071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 710, receives a command from the processor 710, and executes the command. In addition, the touch panel 7071 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 707 may include other input devices 7072 in addition to the touch panel 7071. In particular, the other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 7071 detects a touch operation on or near the touch panel 7071, the touch operation is transmitted to the processor 710 to determine the type of the touch event, and then the processor 710 provides a corresponding visual output on the display panel 7061 according to the type of the touch event. Although the touch panel 7071 and the display panel 7061 are shown in fig. 7 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited herein.
The interface unit 708 is an interface through which an external device is connected to the mobile terminal 700. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 708 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 700 or may be used to transmit data between the mobile terminal 700 and external devices.
The memory 709 may be used to store software programs as well as various data. The memory 709 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 709 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 710 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 709 and calling data stored in the memory 709, thereby integrally monitoring the mobile terminal. Processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 710.
The mobile terminal 700 may also include a power supply 711 (e.g., a battery) for powering the various components, and the power supply 711 may be logically coupled to the processor 710 via a power management system that may enable managing charging, discharging, and power consumption by the power management system.
In addition, the mobile terminal 700 includes some functional modules that are not shown, and thus will not be described in detail herein.
Preferably, an embodiment of the present invention further provides a mobile terminal, including a processor 710, a memory 709, and a computer program stored in the memory 709 and capable of running on the processor 710, where the computer program is executed by the processor 710 to implement each process of the above-mentioned working current self-checking method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned working current self-checking method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, 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 like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. An operating current self-checking circuit, comprising:
the first end of the module to be tested is electrically connected with the signal input end of the circuit, and the second end of the module to be tested is electrically connected with the load of the circuit;
the switch control module is connected between the first end of the module to be tested and the signal input end and is used for controlling the first end of the module to be tested to be directly conducted with the signal input end or controlling the first end of the module to be tested to be conducted with the signal input end through a sampling resistor;
and the current detection module is connected with the two ends of the sampling resistor in parallel and used for detecting the current value of the module to be detected when the first end of the module to be detected is connected with the signal input end through the sampling resistor.
2. The circuit of claim 1, wherein the switch control module comprises:
the first end of the control switch is electrically connected with the signal input end of the circuit, the second end of the control switch is electrically connected with the load of the circuit, the control switch is used for controlling the first end of the module to be tested to be directly conducted with the signal input end when the control switch is closed, and the control switch is used for controlling the first end of the module to be tested to be conducted with the signal input end through the sampling resistor when the control switch is disconnected;
the sampling resistor is connected in parallel at two ends of the control switch.
3. The circuit of claim 2, wherein the switch control module comprises:
the first detection switch is connected between the first end of the control switch and the first end of the sampling resistor;
the second detection switch is connected between the second end of the control switch and the second end of the sampling resistor;
the switch control module is used for:
under the condition that the control switch is closed, the first detection switch and the second detection switch are controlled to be closed, and then the control switch is controlled to be switched off, so that the first end of the module to be detected is controlled to be conducted with the signal input end through the sampling resistor.
4. The circuit of claim 1, wherein the module under test comprises at least one of a low dropout linear regulator and a dc-to-dc voltage converter.
5. The circuit of claim 4, wherein the module under test comprises: the low-dropout linear regulator is electrically connected with the first signal input end at the first end and the first end of the load at the second end, and the direct current-direct current voltage converter is electrically connected with the second signal input end at the first end and the second end of the load at the second end;
the switch control module is used for controlling the first end of the low dropout linear regulator to be electrically connected with the first signal input end through the sampling resistor, and simultaneously controlling the first end of the direct current-direct current voltage converter to be directly and electrically connected with the second signal input end, or is used for controlling the first end of the direct current-direct current voltage converter to be electrically connected with the second signal input end through the sampling resistor, and simultaneously controlling the first end of the low dropout linear regulator to be directly and electrically connected with the first signal input end;
the current detection module is used for detecting the current value passing through the low dropout regulator when the first end of the low dropout regulator is electrically connected with the first signal input end through a sampling resistor;
the current detection module is used for detecting the current value passing through the DC-DC voltage converter when the first end of the DC-DC voltage converter is electrically connected with the second signal input end through the sampling resistor.
6. The circuit of claim 5, wherein the switch control module comprises:
the first switch is electrically connected with the first signal input end at the first end, and is electrically connected with the first end of the low dropout regulator at the second end;
a second switch having a first end electrically connected to the second signal input end and a second end electrically connected to the first end of the dc-dc voltage converter;
the first end of the third switch is electrically connected with the first signal input end, the second end of the third switch is electrically connected with the second signal input end, the movable end of the third switch is electrically connected with the first end of the sampling resistor, and the movable end of the third switch is used for being lapped with the first end or the second end of the third switch;
the first end of the fourth switch is electrically connected with the first end or the second end of the sampling resistor, and the second end of the fourth switch is electrically connected with the first end of the low dropout regulator.
7. The circuit of claim 6, wherein the switch control module is to:
under the condition that the first switch is turned on, after the movable end of the third switch is overlapped with the first end of the third switch and the movable end of the fourth switch is overlapped with the first end of the fourth switch, controlling the first switch to be turned off;
and under the condition that the second switch is turned on, after the movable end of the third switch is overlapped with the second end of the third switch and the movable end of the fourth switch is overlapped with the second end of the fourth switch, controlling the second switch to be turned off.
8. The circuit according to any one of claims 1 to 7, wherein the current detection module is configured to detect a voltage difference across the sampling resistor when the first end of the module under test is electrically connected to the signal input end through the sampling resistor, and calculate a current value passing through the module under test according to the voltage difference and a resistance value of the sampling resistor.
9. The circuit of any of claims 5 to 7, further comprising:
the first capacitor is electrically connected with the first pole plate and the second end of the low dropout regulator, and the second pole plate is grounded;
an inductor having a first end electrically connected to the second end of the dc-dc voltage converter and a second end electrically connected to the second end of the load;
the first polar plate is electrically connected with the second end of the inductor, and the second polar plate is grounded.
10. The circuit of any of claims 1-7, further comprising:
and the register is electrically connected with the current detection module and is used for storing the current value detected by the current detection module and passing through the module to be detected.
11. An operating current self-checking method applied to the circuit of any one of claims 1 to 10, comprising:
the method comprises the steps that a sampling resistor is connected between a signal input end and a module to be tested through a switch control module, so that a first end of the module to be tested is conducted with the signal input end through the sampling resistor;
after the current value of the current detection modules connected in parallel at the two ends of the sampling resistor is stable, the switch control module controls the electric signal input by the signal input end to flow to the module to be detected through the sampling resistor;
and determining the working current of the module to be detected according to the current value of the current detection module.
12. An electronic device, comprising:
the signal access module accesses the sampling resistor between the signal input end and the module to be tested through the switch control module, so that the first end of the module to be tested is conducted with the signal input end through the sampling resistor;
the conduction control module controls the electric signal input by the signal input end to flow to the module to be tested through the sampling resistor by the switch control module after the current value of the current detection modules connected in parallel to the two ends of the sampling resistor is stable;
and the current determining module is used for determining the working current of the module to be detected according to the current value of the current detecting module.
13. A mobile terminal, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method as claimed in claim 11.
14. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method as claimed in claim 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010120882.0A CN111257786A (en) | 2020-02-26 | 2020-02-26 | Working current self-checking circuit and method and electronic equipment |
| PCT/CN2021/076867 WO2021169850A1 (en) | 2020-02-26 | 2021-02-19 | Working current self-checking circuit and method, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010120882.0A CN111257786A (en) | 2020-02-26 | 2020-02-26 | Working current self-checking circuit and method and electronic equipment |
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| CN111257786A true CN111257786A (en) | 2020-06-09 |
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| CN202010120882.0A Pending CN111257786A (en) | 2020-02-26 | 2020-02-26 | Working current self-checking circuit and method and electronic equipment |
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| WO (1) | WO2021169850A1 (en) |
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| WO2021169850A1 (en) * | 2020-02-26 | 2021-09-02 | 维沃移动通信有限公司 | Working current self-checking circuit and method, and electronic device |
| CN113625044A (en) * | 2021-08-05 | 2021-11-09 | 南京国电南自电网自动化有限公司 | Switching value sampling device and method |
| CN113655270A (en) * | 2021-08-02 | 2021-11-16 | 交控科技股份有限公司 | Detection device and method for acquisition circuit of annunciator |
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| CN113885631B (en) * | 2021-10-27 | 2023-07-18 | 昂宝电子（上海）有限公司 | Port current detection method and circuit for power management system |
| CN114217194A (en) * | 2021-11-23 | 2022-03-22 | 河北博威集成电路有限公司 | Testing device |
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