CN106292393B - Control circuit, control method and the electronic device of reference signal - Google Patents
Control circuit, control method and the electronic device of reference signal Download PDFInfo
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- CN106292393B CN106292393B CN201510260017.5A CN201510260017A CN106292393B CN 106292393 B CN106292393 B CN 106292393B CN 201510260017 A CN201510260017 A CN 201510260017A CN 106292393 B CN106292393 B CN 106292393B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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Abstract
In the control circuit of reference signal disclosed by the invention, processing unit control switch unit is output to the first reference signal end of load using the voltage of the first ground terminal as reference signal, and judges whether the voltage of the first ground terminal is more than setting value.If so, processing unit control switch unit adjusts the first signal for being output to the first signal input part from the control circuit of reference signal using the voltage adjustment reference signal and processing unit of default power end according to the voltage of default power end.Reference signal adjusted is output to the first reference signal end by processing unit, and the first signal adjusted is output to the first signal input part of load.In above-mentioned control circuit, when the voltage of ground terminal is greater than the set value, processing unit can be using the reference signal of the voltage adjustment load of default power end, while adjustment is output to the first signal magnitude of the signal input part of load, ensure that signal stabilization.Invention additionally discloses a kind of control method of reference signal and a kind of electronic devices.
Description
Technical field
The present invention relates in electronic field, more specifically, it is related to a kind of control circuit of reference signal, a kind of reference is believed
Number control method and a kind of electronic device of the control circuit with the reference signal.
Background technique
In an electronic, such as mobile phone, the signal (such as driving signal, control signal etc.) of many components require to join
Signal is examined to realize.Some driving signals are reference with ground terminal, some driving signals are reference, some signals such as difference with power supply
Signal then mutually refers to.
Reference signal will not generally change, but when electronic device is because of mode of operation or operating environment change, can cause
The fluctuation of reference signal causes the unstable of signal, and then makes driving signal, control signal etc. signals by biggish interference,
It is easy to cause the driving or control failure of component.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention needs to provide one
The control circuit of kind of reference signal and a kind of control method of reference signal and a kind of control circuit with the reference signal
Electronic device.
A kind of control circuit of reference signal, including processing unit, switch unit and load, the processing unit connect this and open
Unit and the load are closed, which includes the first reference signal end and the first signal input part.
The processing unit for control the switch unit using the voltage of the first ground terminal as reference signal be output to this first
Reference signal end, and judge whether the voltage of first ground terminal is more than setting value.If so, the processing unit is for controlling the switch
Unit adjusts the reference signal using the voltage of default power end and the processing unit is used to preset the voltage of power end according to this
Adjustment is output to the first signal of first signal input part from the control circuit of the reference signal.The processing unit will be for that will adjust
The reference signal after whole is output to the first reference signal end, and for by first signal adjusted be output to this first
Signal input part.If it is not, the processing unit is for continuing to judge whether the voltage of first ground terminal is more than the setting value.
In the control circuit of above-mentioned reference signal, when the voltage of ground terminal is greater than the set value, processing unit can be using in advance
If the reference signal of the voltage adjustment load of power end, meanwhile, the letter of load is output to according to the adjustment of the voltage of default power end
First signal magnitude of number input terminal, ensure that signal stabilization.
In one embodiment, which includes processor, operational amplifier and adjustment module.The processor connects
It connects the adjustment module and first signal is adjusted according to the voltage for presetting power end for controlling the adjustment module.The processor
It connects the switch unit and adjusts the reference signal using the voltage of the default power end for controlling the switch unit.The operation
Amplifier connects the adjustment module and for first signal adjusted to be output to the processor.The processor will be for that will adjust
First signal after whole is output to first signal input part, and for by the reference signal adjusted be output to this first
Reference signal end.
In one embodiment, which includes adjustment control terminal, the second reference signal end, switch control terminal, the
Binary signal input terminal, signal output end and reference signal output end, the adjustment module include resistance R1 and resistance R2, the switch list
Member includes control terminal, first end and second end.The adjustment control terminal connects the first end of resistance R1, the second end connection of resistance R1
The second end of the first end of resistance R2, resistance R2 connects the second ground terminal.The input terminal of the control circuit of the reference signal connects electricity
Hinder the second end of R1 and the first end of resistance R2.The positive input of the operational amplifier connects the control circuit of the reference signal
Input terminal, the negative input of the operational amplifier connects the output end of the operational amplifier, the output of the operational amplifier
End connects the second signal input terminal.The switch control terminal connects the control terminal of the switch unit.The second reference signal end connects
Connect the first end and first ground terminal of the switch unit.The second end of the switch unit connects the default power end.The signal is defeated
Outlet connects first signal input part.The reference signal output end connects the first reference signal end.
In one embodiment, which is Metal-Oxide Semiconductor field effect transistor.
In one embodiment, which includes adjustment control terminal, the second reference signal end, switch control terminal, the
Binary signal input terminal, signal output end and reference signal output end, the adjustment module include resistance R1 and resistance R2, the switch list
Member includes control terminal, first end, second end and third end.The adjustment control terminal connects the first end of resistance R1, and the of resistance R1
Two ends connect the first end of resistance R2, and the second end of resistance R2 connects the second ground terminal.The input of the control circuit of the reference signal
The second end of end connection resistance R1 and the first end of resistance R2.The positive input of the operational amplifier connects the reference signal
The negative input of the input terminal of control circuit, the operational amplifier connects the output end of the operational amplifier, the operation amplifier
The output end of device connects the second signal input terminal.The switch control terminal connects the control terminal of the switch unit.Second reference
Signal end connects the first end of the switch unit.The second end of the switch unit connects the default power end.The switch unit
Third end connects first ground terminal.The signal output end connects first signal input part.Reference signal output end connection should
First reference signal end.
In one embodiment, which is relay.
A kind of control method of reference signal, comprising the following steps:
S1: processing unit judges whether the voltage of the first ground terminal is more than setting value, if so, S2 is entered step, if it is not, continuing
Step S1, the voltage of first ground terminal are output to the first reference signal end of load as reference signal；
S2: the processing unit control switch unit adjusts the reference signal and the processing using the voltage of default power end
Unit is output to the first signal of the first signal input part of the load according to the voltage adjustment for presetting power end；
S3: the reference signal adjusted is output to the first reference signal end by the processing unit, and for that will adjust
First signal afterwards is output to first signal input part.
In one embodiment, which includes processor, operational amplifier and adjustment module.Step S2 packet
Include: the processor controls the adjustment module and adjusts first signal and processor control according to the voltage for presetting power end
The switch unit adjusts the reference signal using the voltage of the default power end.Step S3 includes: that the operational amplifier will adjust
First signal afterwards is output to the processor, which is output to first signal for first signal adjusted and inputs
End, and the reference signal adjusted is output to the first reference signal end.
In one embodiment, the voltage of the default power end is 2 volts.
A kind of electronic device, the control circuit including reference signal as described above.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the module diagram of the control circuit of the reference signal of better embodiment of the present invention；
Fig. 2 is the module diagram of the control circuit of the reference signal of another better embodiment of the present invention；And
Fig. 3 is the flow diagram of the control method of the reference signal of better embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
The feature of one ", " second " can explicitly or implicitly include one or more feature.In description of the invention
In, " multiple " are meant that two or more, unless otherwise specifically defined.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected or can be in communication with each other；It can be directly connected, it can also be by between intermediary
It connects connected, can be the connection inside two elements or the interaction relationship of two elements.For the ordinary skill of this field
For personnel, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.In order to
Simplify disclosure of the invention, hereinafter to the component of specific examples and being set for describing.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relationship.In addition, the present invention provides various specific techniques and material example, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
Referring to Fig. 1, the control circuit 100 of the reference signal of the first better embodiment of the invention includes processing unit
102, switch unit 104 and load 106, the processing unit 102 connect the switch unit 104 and load 106.Present embodiment
In, load 106 is by taking loudspeaker (SPK) as an example.The load 106 includes the first reference signal end Ref1 and the first signal input part S_
in1。
In the electronic device applied by the load 106, since PCB layout etc. is asked when the certain module of electronic device is opened
Topic, 106 original reference ground GND1 of load are possible to introduce biggish interference, cause the voltage fluctuation of reference ground GND1,
Such as become 600mV by 20 milli pressure (mV) fluctuations.Therefore, this will cause load 106 and generates the problems such as failing such as driving.At this
In the case of kind, stable power end can be switched to the reference signal of load 106 by the control circuit 100 of reference signal of the invention
End.
The processing unit 102 is defeated as reference signal using the voltage of the first ground terminal GND1 for controlling the switch unit 104
Out to the first reference signal end Ref1, and judge whether the voltage of first ground terminal GND1 is more than setting value.In present embodiment,
Setting value is 100mV.That is, whether processing unit 102 judges the voltage of the first ground terminal GND1 more than 100mV.
If so, the processing unit 102, which is used to control the switch unit 104, adjusts the ginseng using the voltage of default power end S
It examines signal and the processing unit 102 is used to preset the voltage adjustment of power end S according to this from the control circuit of the reference signal
100 are output to the first signal Signal of first signal input part S_in1.In present embodiment, the voltage of power end S is preset
For 2V.First signal Signal can be the signals such as the driving signal of load 106 or control signal.
The processing unit 102 is used to for the reference signal adjusted being output to first reference signal end Ref1, and uses
In first signal Signal adjusted is output to first signal input part S_in1.
If it is not, the processing unit 102 is for continuing to judge whether the voltage of first ground terminal GND1 is more than the setting value.
Specifically, which includes processor 108, operational amplifier 110 and adjustment module 112.Processor
108 be, for example, digital signal processor (DSP), which connects the adjustment module 112 and for controlling the adjustment module
112 adjustment are output to the first signal Signal of the load.
The processor 108 connects the switch unit 104 and for controlling the switch unit 104 using the default power end S
Voltage adjust the reference signal.In present embodiment, specifically doing for the reference signal is adjusted using the voltage of default power end S
Method are as follows: using the voltage 2V of default power end S as the reference signal.
The operational amplifier 110 connects the adjustment module 112 and for the first signal Signal adjusted to be output to
The processor 108.
The processor 108 is used to the first signal Signal adjusted being output to the first signal input part S_in1.
Specifically, which includes adjustment control terminal V_Contrl, the second reference signal end Ref2, switch control
Hold Contrl, second signal input terminal S_in2, signal output end S_o and reference signal output end R_o, the adjustment module 112 packet
Resistance R1 and resistance R2 is included, which includes control terminal, first end and second end.
Second reference signal end Ref2 the first ground terminal of connection GND1 of processor 108, the second reference signal end Ref2 have
Analyze signal sampling function.The amplitude and ripple size that can analyze reference signal of processor 108 in this way, so as to judge
Whether the voltage of the first ground terminal GND1 is more than setting value.
The first end of adjustment control terminal V_Contrl connection resistance R1, the first of the second end connection resistance R2 of resistance R1
The second end at end, resistance R2 connects the second ground terminal GND2.The input terminal S_in connection resistance R1 of the control circuit of the reference signal
Second end and resistance R2 first end.It should be pointed out that the second ground terminal GND2 is not received farther out and from the first ground terminal GND1
To the ground terminal of interference.Can determine it is which is selected after the testing of electronic devices applied by the control circuit 100 to reference signal
Ground terminal is as the second ground terminal GND2.Million grades of ohms may be selected in the resistance value of resistance R1 and resistance R2.
The positive input of the operational amplifier 110 connects the input terminal S_in of the control circuit 100 of the reference signal, should
The negative input of operational amplifier 110 connects the output end of the operational amplifier 110, the output end of the operational amplifier 110
Connect second signal input terminal S_in2.When the voltage of the first ground terminal GND1 is more than setting value, processor control switch unit
104 utilize the voltage adjustment reference signal for presetting power end S.Therefore, because reference signal is changed, at this moment need simultaneously
Promoting the signal amplitude of the first signal Signal, operational amplifier 110 (used herein as voltage follower) realizes this function,
It can be buffered using operational amplifier 110 with reference to the control circuit 100 of signal, to avoid by outputting and inputting bring
Loss of signal.
When the voltage of the first ground terminal GND1 is more than setting value, processor 108 is by adjusting control terminal V_Contrl output
Signal is controlled, and the first signal is made to operational amplifier 110 (voltage follower) by resistance R1 and resistance R2 bias pressure
The amplitude of Signal also increases 2V, so that the first signal adjusted that the signal output end S_o through processor 108 is exported
Signal increases 2V, and the first signal Signal adjusted in this way and reference signal, which are subtracted each other, will not be such that original signal size changes
Become.
Switch control terminal Contrl connects the control terminal of the switch unit 104.Second reference signal end Ref2 connection
The first end of the switch unit 104.The second end of the switch unit 104 default power end S.Signal output end S_o connection
First signal input part S_in1.Reference signal output end R_o connects first reference signal end Ref1.
In present embodiment, which is Metal-Oxide Semiconductor field effect transistor (MOSFET), is opened
The selection for closing unit 104 is to try to that conduction voltage drop is made to vary less (such as within millivolt level), in order to avoid excessively high conduction voltage drop
Influence signal stabilization.The control terminal of switch unit 104 is the grid of MOSFET, and first end is the source electrode of MOSFET, second end
For the drain electrode of MOSFET, grid connection switch the control terminal Contrl, the second reference signal end Ref2 connection MOSFET of MOSFET
Source electrode and the drain electrode of the first ground terminal GND1, MOSFET connect default power end S.When processor 108 judges the first ground terminal GND1
Voltage when being less than setting value, processor 108 does not output a control signal to switch unit 104, disconnect switch unit 104,
The voltage of first ground terminal GND1 is output to the first reference signal end Ref1 as reference signal.
When processor 108 judges the voltage of the first ground terminal GND1 more than setting value, the output control signal of processor 108,
Switch unit 104 is connected, and then exports the voltage of default power end S through reference signal output end R_o as reference signal
To the first reference signal end Ref1.
In conclusion in the control circuit 100 of above-mentioned reference signal, when the voltage of ground terminal GND1 is greater than the set value, place
106 reference signal can be loaded using the voltage adjustment of default power end S by managing unit 102, meanwhile, according to default power end S
Voltage adjustment be output to load 106 signal input part the first signal magnitude Signal, ensure that signal stabilization.
It please join Fig. 2, the second better embodiment of the invention provides a kind of control circuit 200 of reference signal.This embodiment party
The control circuit 200 of the reference signal of formula and the control circuit 100 of the reference signal of the first better embodiment are essentially identical,
The difference is that: the switch unit 202 of present embodiment is relay.
Specifically, relay is, for example, electromagnetic relay, which includes control terminal K0, first end K1, second
Hold K2 and third end K3.
The control terminal K0 of the switch control terminal Contrl connection switch unit 202 of processor 204.The second of processor 204
Reference signal end Ref2 connects the first end K1 of the switch unit 202.Power end is preset in the second end K2 connection of switch unit 202
S.Third end K3 the first ground terminal of connection GND1 of switch unit 202.The signal output end S_o connection load 206 of processor 204
First signal input part S_in1.First reference signal end of the reference signal output end R_o connection load 206 of processor 204
Ref1。
When the voltage of the first ground terminal GND1 is less than setting value, processor 204 is controlled by switch control terminal Contrl
First end K1 is connected to the third end K3 of switch unit 202 by switch unit 202, makes the voltage of the first ground terminal GND1 as reference
Signal is exported to the first reference signal end Ref1 of load.
When processor 204 judges the voltage of the first ground terminal GND1 more than setting value, processor 204 passes through switch control terminal
First end K1 is connected to the second end K2 of the switch unit 202 by Contrl control switch unit 202, makes default power end S's
Voltage is exported as reference signal to the first reference signal end Ref1 of load 206.
Other explanations of the control circuit 200 of the reference signal of present embodiment can join the reference of the first better embodiment
The corresponding part of the control circuit 100 of signal, is no longer developed in details herein.
In conclusion in the control circuit 200 of above-mentioned reference signal, when the voltage of ground terminal GND1 is greater than the set value, place
The reference signal that unit can be loaded using the voltage adjustment of default power end S is managed, meanwhile, according to the voltage of default power end S
Adjustment is output to the first signal Signal size of 206 signal input parts of load, ensure that signal stabilization.
Please join Fig. 3, the control method of the reference signal of third better embodiment of the present invention the following steps are included:
S1: processing unit 102 judges whether the voltage of the first ground terminal GND1 is more than setting value, if so, S2 is entered step, if
It is no, continue step S1, the voltage of first ground terminal GND1 is output to the first reference signal end of load 106 as reference signal
Ref1；
S2: the 102 control switch unit 104 of processing unit adjusts the reference signal using the voltage of default power end S, and
The processing unit 102 is output to the first signal input part S_in1 of the load 106 according to the voltage adjustment for presetting power end S
The first signal；
S3: the reference signal adjusted is output to first reference signal end Ref1 by the processing unit 102, and is used for
First signal adjusted is output to first signal input part S_in1.
It is appreciated that the control method of the reference signal of present embodiment can be by the reference signal of the first better embodiment
Control circuit 100 or the second better embodiment reference signal control circuit 200 realize.In present embodiment, with ginseng
It examines for the control method of signal is realized by the control circuit 100 of the reference signal of the first better embodiment and illustrates.
Specifically, which includes processor 108, operational amplifier 110 and adjustment module 112.
In step sl, setting value 100mV.Processor 108 judges whether the voltage of first ground terminal S is more than setting value
100mY。
Step S2 includes: that the processor 108 control adjustment module 112 should according to voltage adjustment for presetting power end S
First signal Signal and the processor 108 control the switch unit 104 and adjust the ginseng using the voltage for presetting power end S
Examine signal.
Specifically, in present embodiment, the voltage of the default power end S is 2 volts.It is more than in the voltage of the first ground terminal GND1
When setting value, processor 108 exports control signal by adjusting control terminal V_Contrl, and is divided by resistance R1 and resistance R2
It is biased to operational amplifier 110 (voltage follower), also increases the amplitude of the first signal Signal by 2V, so that through processor
The first signal Signal adjusted of 108 signal output end S_o output increases 2V, the first signal adjusted in this way
Signal and reference signal, which are subtracted each other, will not make original signal size change.
The specific practice of the reference signal is adjusted using the voltage of default power end S are as follows: make the voltage of default power end S
For the reference signal.Specifically, when processor 108 judges the voltage of the first ground terminal GND1 more than setting value, processor 108 is controlled
Switch unit 104 processed is connected, and the voltage (2V) of default power end S is made to be output to the first reference of load 106 as reference signal
Signal end Ref1.If being pointed out that the control method of the reference signal of present embodiment by the second better embodiment
When the control circuit 200 of reference signal is realized, when the voltage of the first ground terminal GND1 is more than setting value, processor 204 is by opening
The second end K2 that first end K1 is connected to the switch unit 202 by control terminal Contrl control switch unit 202 is closed, default electricity is made
The voltage of source S is exported as reference signal to the first reference signal end Ref1 of load 206.
Step S3 includes: that first signal adjusted is output to the processor 108 by the operational amplifier 110, at this
First signal Signal adjusted is output to first signal input part S_in1 by reason device 108, and by the reference adjusted
Signal is output to first reference signal end Ref1.
In step s3, when the voltage of the first ground terminal GND1 is more than setting value, processor 108 utilizes default power end S
Voltage simultaneously adjust reference signal and the first signal Signal so that the first signal Signal adjusted and reference signal phase
Subtracting will not make original signal size change.
In conclusion, when the voltage of ground terminal GND1 is greater than the set value, processing is single in the control method of above-mentioned reference signal
Member 102 can load 106 reference signal using the voltage adjustment of default power end S, meanwhile, according to the electricity of default power end S
Pressure adjustment is output to the first signal magnitude of the signal input part of load 106, ensure that signal stabilization.
4th better embodiment of the invention also provides a kind of electronic device, which includes any of the above embodiment party
The control circuit of the reference signal of formula.The electronic device is, for example, the electronic devices such as mobile phone, tablet computer.Therefore, this embodiment party
The electronic device of formula is capable of the signal stabilization of proof load such as loudspeaker.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example
Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the invention.In this specification
In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, " multiple " are meant that at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
Claims (10)
1. a kind of control circuit of reference signal, which is characterized in that including processing unit, switch unit and load, the processing list
Member connects the switch unit and the load, which includes the first reference signal end and the first signal input part；
The processing unit is output to first reference for the voltage of the first ground terminal as reference signal for controlling the switch unit
Signal end, and judge whether the voltage of first ground terminal is more than setting value；
If so, the processing unit, which is used to control the switch unit, adjusts the reference signal using the voltage of default power end, and should
The voltage that processing unit is used to preset power end according to this, which is adjusted from the control circuit of the reference signal, is output to first signal
First signal of input terminal；
The processing unit is used to for the reference signal adjusted being output to the first reference signal end, and being used for will be adjusted
First signal is output to first signal input part；
If it is not, the processing unit is for continuing to judge whether the voltage of first ground terminal is more than the setting value.
2. the control circuit of reference signal as described in claim 1, which is characterized in that the processing unit includes processor, fortune
Calculate amplifier and adjustment module；
The processor connect the adjustment module and for control the adjustment module according to the voltage for presetting power end adjust this
One signal；
The processor connects the switch unit and adjusts the ginseng using the voltage of the default power end for controlling the switch unit
Examine signal；
The operational amplifier connects the adjustment module and for first signal adjusted to be output to the processor；
The processor is used to for first signal adjusted being output to first signal input part, and for being somebody's turn to do adjusted
Reference signal is output to the first reference signal end.
3. the control circuit of reference signal as claimed in claim 2, which is characterized in that the processor include adjustment control terminal,
Second reference signal end, switch control terminal, second signal input terminal, signal output end and reference signal output end, the adjustment mould
Block includes resistance R1 and resistance R2, which includes control terminal, first end and second end；
The adjustment control terminal connects the first end of resistance R1, and the second end of resistance R1 connects the first end of resistance R2, resistance R2's
Second end connects the second ground terminal；
The second end of the input terminal connection resistance R1 of the control circuit of the reference signal and the first end of resistance R2；
The positive input of the operational amplifier connects the input terminal of the control circuit of the reference signal, which bears
The output end of the operational amplifier is connected to input terminal, the output end of the operational amplifier connects the second signal input terminal；
The switch control terminal connects the control terminal of the switch unit；
The second reference signal end connects the first end and first ground terminal of the switch unit；
The second end of the switch unit connects the default power end；
The signal output end connects first signal input part；
The reference signal output end connects the first reference signal end.
4. the control circuit of reference signal as claimed in claim 3, which is characterized in that the switch unit is metal-oxide
Semiconductor field effect transistor.
5. the control circuit of reference signal as claimed in claim 2, which is characterized in that the processor include adjustment control terminal,
Second reference signal end, switch control terminal, second signal input terminal, signal output end and reference signal output end, the adjustment mould
Block includes resistance R1 and resistance R2, which includes control terminal, first end, second end and third end；
The adjustment control terminal connects the first end of resistance R1, and the second end of resistance R1 connects the first end of resistance R2, resistance R2's
Second end connects the second ground terminal；
The second end of the input terminal connection resistance R1 of the control circuit of the reference signal and the first end of resistance R2；
The positive input of the operational amplifier connects the input terminal of the control circuit of the reference signal, which bears
The output end of the operational amplifier is connected to input terminal, the output end of the operational amplifier connects the second signal input terminal；
The switch control terminal connects the control terminal of the switch unit；
The second reference signal end connects the first end of the switch unit；
The second end of the switch unit connects the default power end；
The third end of the switch unit connects first ground terminal；
The signal output end connects first signal input part；
The reference signal output end connects the first reference signal end.
6. the control circuit of reference signal as claimed in claim 5, which is characterized in that the switch unit is relay.
7. a kind of control method of reference signal, which comprises the following steps:
S1: processing unit judges whether the voltage of the first ground terminal is more than setting value, if so, S2 is entered step, if it is not, continuing step
S1, the voltage of first ground terminal are output to the first reference signal end of load as reference signal；
S2: the processing unit control switch unit adjusts the reference signal and the processing unit using the voltage of default power end
The first signal of the first signal input part of the load is output to according to the voltage adjustment for presetting power end；
S3: the reference signal adjusted is output to the first reference signal end by the processing unit, and being used for will be adjusted
First signal is output to first signal input part.
8. the control method of reference signal as claimed in claim 7, which is characterized in that the processing unit includes processor, fortune
Calculate amplifier and adjustment module；
Step S2 includes: that the processor controls the adjustment module and adjusts first signal according to the voltage for presetting power end, and
The processor controls the switch unit and adjusts the reference signal using the voltage of the default power end；
Step S3 includes: that first signal adjusted is output to the processor by the operational amplifier, which will adjust
First signal afterwards is output to first signal input part, and the reference signal adjusted is output to first reference and is believed
Number end.
9. the control method of reference signal as claimed in claim 7, which is characterized in that the voltage of the default power end is 2 volts.
10. a kind of electronic device, which is characterized in that the control electricity including reference signal as described in any one of claims 1 to 6
Road.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260017.5A CN106292393B (en) | 2015-05-20 | 2015-05-20 | Control circuit, control method and the electronic device of reference signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260017.5A CN106292393B (en) | 2015-05-20 | 2015-05-20 | Control circuit, control method and the electronic device of reference signal |
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| CN106292393B true CN106292393B (en) | 2019-01-11 |
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Citations (5)
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|---|---|---|---|---|
| JP2007241777A (en) * | 2006-03-10 | 2007-09-20 | Nec Corp | Temperature compensating regulator circuit |
| CN102043096A (en) * | 2009-10-15 | 2011-05-04 | 瑞鼎科技股份有限公司 | Capacitance measurement circuit and method |
| CN103425169A (en) * | 2013-05-03 | 2013-12-04 | 富达通科技股份有限公司 | Method for automatically adjusting voltage level and voltage level adjusting device |
| JP2014154327A (en) * | 2013-02-07 | 2014-08-25 | Rohm Co Ltd | Control circuit for light-emitting device, light-emitting device using the same, and electronic apparatus |
| CN104615053A (en) * | 2015-01-19 | 2015-05-13 | 深圳市中科源电子有限公司 | Transistor-controlled electronic load control circuit |
-
2015
- 2015-05-20 CN CN201510260017.5A patent/CN106292393B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007241777A (en) * | 2006-03-10 | 2007-09-20 | Nec Corp | Temperature compensating regulator circuit |
| CN102043096A (en) * | 2009-10-15 | 2011-05-04 | 瑞鼎科技股份有限公司 | Capacitance measurement circuit and method |
| JP2014154327A (en) * | 2013-02-07 | 2014-08-25 | Rohm Co Ltd | Control circuit for light-emitting device, light-emitting device using the same, and electronic apparatus |
| CN103425169A (en) * | 2013-05-03 | 2013-12-04 | 富达通科技股份有限公司 | Method for automatically adjusting voltage level and voltage level adjusting device |
| CN104615053A (en) * | 2015-01-19 | 2015-05-13 | 深圳市中科源电子有限公司 | Transistor-controlled electronic load control circuit |
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| CN106292393A (en) | 2017-01-04 |
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