CN104020808A - Driving capacity adjustment method of interface driving circuit and circuit - Google Patents
Driving capacity adjustment method of interface driving circuit and circuit Download PDFInfo
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- CN104020808A CN104020808A CN201410265152.4A CN201410265152A CN104020808A CN 104020808 A CN104020808 A CN 104020808A CN 201410265152 A CN201410265152 A CN 201410265152A CN 104020808 A CN104020808 A CN 104020808A
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Abstract
The invention discloses a driving capacity adjustment method of an interface driving circuit and the circuit. According to the method, the value of driving current output by the interface driving circuit is indirectly compared with a preset reference current value, the driving current output by the interface driving circuit is adjusted according to the comparison result, the driving current of the interface driving circuit can be adjusted along with reference current, and therefore the interface driving circuit can adapt to loads having different requirements.
Description
Technical field
The application relates to circuit control technology field, more particularly, relates to a kind of interface driving circuit driving force method of adjustment and circuit.
Background technology
In the prior art, each chip has interface circuit, described interface driving circuit for drive the load being attached thereto, the driving force of common described interface circuit be conventionally set to fixed size it, or the different gears of fixed size.
But, when practical application, conventionally need the external different load of described chip, because described external load changes, so the driving force of described interface circuit also needs corresponding adjustment, but, the driving force of described chip of the prior art has been set to fixed value size, cause described chip can not realize the self-adaptation adjustment to driving force, even if the driving force of the interface circuit of described chip is set as to the different gears of fixed size, but because gear is fixed, it is the corresponding fixing driving force of each gear, so it can only adapt to the load within the specific limits of load characteristic characteristic, when the load characteristic of described load exceeds this scope, cause load and described chip (load) to produce compatibility issue.
Summary of the invention
In view of this, the application provides a kind of interface driving circuit driving force method of adjustment and circuit to solve load of the prior art and the incompatible problem of described load.
To achieve these goals, the existing scheme proposing is as follows:
An interface driving circuit driving force method of adjustment, is characterized in that, comprising:
Obtain the driving current signal of described interface driving circuit output, and described driving current signal is carried out to current-voltage conversion, obtain drive voltage signal;
Obtain default reference current signal, described reference current signal is carried out to current-voltage conversion, obtain reference voltage signal;
Described drive voltage signal and reference voltage signal are carried out to slew rate comparison, according to comparative result output comparison signal;
According to described comparison signal adjust the drive current of described interface driving circuit.
Preferably, in said method, described described drive voltage signal and reference voltage signal are carried out to slew rate comparison, according to comparative result output comparison signal, comprising:
Judge that the difference of the speed that speed that described drive voltage signal changes and described reference voltage signal change is whether in preset range, if export the first comparison signal;
Otherwise, judge whether the speed that described drive voltage signal changes is greater than the speed that described reference voltage signal changes, if output the second comparison signal; Otherwise output the 3rd comparison signal.
Preferably, in said method, described according to described comparison signal adjust the drive current of described interface driving circuit, comprising:
When the comparison signal getting is the second comparison signal, output the first control signal, the drive current of controlling described interface reduces;
When the comparison signal getting is the 3rd comparison signal, output the second control signal, the drive current of controlling described interface increases.
Preferably, in said method, described reference current signal is adjustable signal.
Preferably, in said method, can also comprise:
When described comparison signal is the first comparison signal, output the first cue;
When described comparison signal is second or during the 3rd comparison signal, output the second cue.
An interface driving circuit driving force Circuit tuning, comprising:
Interface driving circuit, for output driving current, drives loaded work piece;
Sample circuit, for obtaining the driving current signal of described interface driving circuit output;
The first voltage conversion circuit, for described driving current signal is carried out to current-voltage conversion, obtains drive voltage signal;
Reference current generating circuit, for output reference current signal;
Second voltage change-over circuit, for described driving current signal is carried out to current-voltage conversion, obtains drive voltage signal;
Slew rate comparer, for described drive voltage signal and reference voltage signal are carried out to slew rate comparison, according to comparative result output comparison signal;
Adjuster, for according to described comparison signal adjust the drive current of described interface driving circuit.
Preferably, in above-mentioned interface driving circuit driving force Circuit tuning, described slew rate comparer, specifically for:
Judge that the difference of described drive voltage signal and described reference voltage signal pace of change is whether in preset range, if output the first comparison signal;
Otherwise, judge whether the speed that described drive voltage signal changes is greater than the speed that described reference voltage signal changes, if output the second comparison signal; Otherwise output the 3rd comparison signal.
Preferably, in above-mentioned interface driving circuit driving force Circuit tuning, described adjuster specifically for:
When the comparison signal getting is the second comparison signal, output the first control signal, the drive current of controlling described interface reduces;
When the comparison signal getting is the 3rd comparison signal, output the second control signal, the drive current of controlling described interface increases.
Preferably, in above-mentioned interface driving circuit driving force Circuit tuning, the reference current signal that reference current generating circuit produces is adjustable signal.
Preferably, in above-mentioned interface driving circuit driving force Circuit tuning, can also comprise:
The signal prompt device being connected with described slew rate comparer, for obtaining the comparison signal of described slew rate comparer output, when described comparison signal is the first comparison signal, output the first cue; When described comparison signal is second or during the 3rd comparison signal, output the second cue.
From above-mentioned technical scheme, can find out, the application's disclosed interface driving circuit driving force method of adjustment and circuit, by indirectly the current value of the drive current of described interface driving circuit output and default reference current value being contrasted, and adjust according to comparing result the drive current that described interface driving circuit is exported, the drive current of described interface driving circuit can be adjusted with described reference current, thereby reach the load that described interface driving circuit can adapt to different demands.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiment of the application, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the process flow diagram of the disclosed a kind of interface driving circuit driving force method of adjustment of the embodiment of the present application;
Fig. 2 is the process flow diagram of the disclosed interface driving circuit driving force of the another embodiment of the application method of adjustment;
Fig. 3 is the structural drawing of the disclosed interface driving circuit driving force of the embodiment of the present application Circuit tuning.
Embodiment
For solving the corresponding fixing driving force of each gear of interface driving circuit in prior art, it can only adapt to the load within the specific limits of load characteristic characteristic, when the load characteristic of described load exceeds this scope, cause load and described chip to produce compatibility issue, the application discloses a kind of interface driving circuit driving force method of adjustment and circuit.
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the application's part embodiment, rather than whole embodiment.Embodiment based in the application, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
Fig. 1 is the process flow diagram of the disclosed interface driving circuit driving force of the embodiment of the present application method of adjustment.
Referring to Fig. 1, the concrete steps of the disclosed described interface driving circuit driving force method of adjustment of the present embodiment are:
Step S101: obtain driving current signal, and convert described driving current signal to drive voltage signal;
Concrete, this step can comprise: the driving current signal of interface driving circuit output described in Real-time Obtaining or interval sampling, and described driving current signal is carried out to current-voltage conversion, obtain drive voltage signal;
Step S102: obtain reference current signal, and convert described reference current signal to reference voltage signal;
Concrete, this step can comprise: obtain default reference current signal, described reference current signal is carried out to current-voltage conversion, obtain reference voltage signal, it is pointed out that the rated current signal of the load that described reference current signal can drive for described interface driving circuit here;
Step S103: described drive voltage signal and reference voltage signal are carried out to slew rate comparison, and export comparison signal;
Concrete, in this step, by judging the size of described reference voltage signal and described drive voltage signal, judge whether the drive current of described interface driving circuit meets loading demand, and export different comparison signals according to comparative result.
Step S104: according to described comparison signal adjust the drive current of described interface driving circuit.
By the current value of the drive current of described interface driving circuit output and default reference current value being contrasted by indirect in the disclosed method of the visible the present embodiment of technique scheme, and adjust according to comparing result the drive current that described interface driving circuit is exported, the drive current of described interface driving circuit can be adjusted with described reference current, thereby reach the load that described interface driving circuit can adapt to different demands.
Fig. 2 is the process flow diagram of the disclosed interface driving circuit driving force of the another embodiment of the application method of adjustment.
Visible referring to Fig. 2, in the disclosed technical scheme of the above embodiments of the present application, described step S103 specifically can comprise:
Step S1031: the difference that judges described drive voltage signal and described reference voltage signal pace of change whether in preset range, if so, execution step S1036, otherwise execution step S1032.Wherein said preset range can independently be set according to user's request, and described preset range is less, and the difference of the drive current that the drive current of described interface driving circuit output and described load are required is less.
Step S1032: judge whether the pace of change of described drive voltage signal is greater than the pace of change of described reference voltage signal, if execution step S1033, otherwise execution step S1034.
Step S1033: output the second comparison signal;
Step S1034: output the 3rd comparison signal;
Step S1035: output the first comparison signal.
Concrete, described step S104 in above-described embodiment specifically can comprise: when the comparison signal getting is the second comparison signal, show that the drive current of now described interface driving circuit output is greater than the rated current of load, export the first control signal, the drive current of controlling described interface reduces;
When the comparison signal getting is the 3rd comparison signal, show that the drive current of now described interface driving circuit output is less than the rated current of load, output the second control signal, the drive current of now controlling described interface increases.
Be understandable that, for described reference current can be changed along with the variation of loading demand, the described reference current signal in the above embodiments of the present application is adjustable reference current signal.
Certainly, for the drive current of interface driving circuit described in can real-time prompting user and the matching relationship between described reference current, in the application's said method, can also comprise: when described comparison signal is first signal, export the first cue, now drive current and the described reference current of described interface driving circuit match prompting user, when described comparison signal is second or during the 3rd comparison signal, output the second topic is signal, and the prompting user now drive current of described interface driving circuit is not mated with described reference current.
Fig. 3 is the structural drawing of the disclosed interface driving circuit driving force of the embodiment of the present application Circuit tuning.
Be understandable that, corresponding to described method, disclosed herein as well is a kind of interface driving circuit driving force Circuit tuning.
Referring to Fig. 3, described interface driving circuit driving force Circuit tuning can comprise:
Interface driving circuit 1, for output driving current, drives loaded work piece;
Sample circuit 2, for obtaining the driving current signal of described interface driving circuit output;
The first voltage conversion circuit 3, for described driving current signal is carried out to current-voltage conversion, obtains drive voltage signal;
Reference current generating circuit 4, for output reference current signal;
Second voltage change-over circuit 5, for described driving current signal is carried out to current-voltage conversion, obtains drive voltage signal;
Slew rate comparer 6, for described drive voltage signal and reference voltage signal are carried out to slew rate comparison, according to comparative result output comparison signal;
Adjuster 7, for according to described comparison signal adjust the drive current of described interface driving circuit.
The course of work of described interface driving circuit driving force Circuit tuning is:
Adopt described sample circuit 2 to obtain the driving current signal of described interface driving circuit 1, and adopt described the first voltage conversion circuit 3 that described driving current signal is converted to drive voltage signal, simultaneously, described second voltage change-over circuit 5 is converted to reference voltage signal by the reference current signal of described reference current generating circuit 4 outputs, described slew rate comparer 6 obtains after described drive voltage signal and described reference voltage signal, both are carried out to slew rate comparison, and export different comparison signals according to comparative result, described adjuster 7 is adjusted the drive current of described interface driving circuit 1 output according to the different comparison signal getting.
Visible, described interface driving circuit driving force Circuit tuning is by indirectly contrasting the current value of the drive current of described interface driving circuit output and default reference current value, and adjust according to comparing result the drive current that described interface driving circuit is exported, the drive current of described interface driving circuit can be adjusted with described reference current, thereby reach the load that described interface driving circuit can adapt to different demands.
Optionally, the described slew rate comparer 6 in above-described embodiment, specifically for:
Judge that the difference of pace of change of described drive voltage signal and described reference voltage signal is whether in preset range, if output the first comparison signal;
Otherwise, judge whether the pace of change of described drive voltage signal is greater than the pace of change of described reference voltage signal, if output the second comparison signal; Otherwise output the 3rd comparison signal.
Described adjuster, specifically for, when the comparison signal getting is the second comparison signal, output the first control signal, the drive current of controlling described interface reduces;
When the comparison signal getting is the 3rd comparison signal, output the second control signal, the drive current of controlling described interface increases.
Be understandable that, for described reference current can be changed along with the variation of loading demand, the reference current generating circuit 4 in the above embodiments of the present application produces circuit for exporting adjustable reference current signal criterion current signal.
Certainly, for the drive current of interface driving circuit described in can real-time prompting user and the matching relationship between described reference current, in above-mentioned interface driving circuit driving force Circuit tuning, can also comprise:
The signal prompt device being connected with described slew rate comparer, for obtaining the comparison signal of described slew rate comparer output, when described comparison signal is the first comparison signal, output the first cue; When described comparison signal is second or during the 3rd comparison signal, output the second cue.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the application.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can be in the situation that do not depart from the application's spirit or scope, realization in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an interface driving circuit driving force method of adjustment, is characterized in that, comprising:
Obtain the driving current signal of described interface driving circuit output, and described driving current signal is carried out to current-voltage conversion, obtain drive voltage signal;
Obtain default reference current signal, described reference current signal is carried out to current-voltage conversion, obtain reference voltage signal;
Described drive voltage signal and reference voltage signal are carried out to slew rate comparison, according to comparative result output comparison signal;
According to described comparison signal adjust the drive current of described interface driving circuit.
2. according to the interface driving circuit driving force method of adjustment in claim 1, it is characterized in that, described described drive voltage signal and reference voltage signal carried out to slew rate comparison, according to comparative result output comparison signal, comprising:
Judge that the difference of the speed that speed that described drive voltage signal changes and described reference voltage signal change is whether in preset range, if export the first comparison signal;
Otherwise, judge whether the speed that described drive voltage signal changes is greater than the speed that described reference voltage signal changes, if output the second comparison signal; Otherwise output the 3rd comparison signal.
3. according to the interface driving circuit driving force method of adjustment in claim 2, it is characterized in that, according to described comparison signal adjust the drive current of described interface driving circuit, comprising:
When the comparison signal getting is the second comparison signal, output the first control signal, the drive current of controlling described interface reduces;
When the comparison signal getting is the 3rd comparison signal, output the second control signal, the drive current of controlling described interface increases.
4. according to the interface driving circuit driving force method of adjustment in claim 1, it is characterized in that, described reference current signal is adjustable signal.
5. according to the interface driving circuit driving force method of adjustment in claim 2, it is characterized in that, also comprise:
When described comparison signal is the first comparison signal, output the first cue;
When described comparison signal is second or during the 3rd comparison signal, output the second cue.
6. an interface driving circuit driving force Circuit tuning, is characterized in that, comprising:
Interface driving circuit, for output driving current, drives loaded work piece;
Sample circuit, for obtaining the driving current signal of described interface driving circuit output;
The first voltage conversion circuit, for described driving current signal is carried out to current-voltage conversion, obtains drive voltage signal;
Reference current generating circuit, for output reference current signal;
Second voltage change-over circuit, for described driving current signal is carried out to current-voltage conversion, obtains drive voltage signal;
Slew rate comparer, for described drive voltage signal and reference voltage signal are carried out to slew rate comparison, according to comparative result output comparison signal;
Adjuster, for according to described comparison signal adjust the drive current of described interface driving circuit.
7. according to the interface driving circuit driving force Circuit tuning in claim 6, it is characterized in that, described slew rate comparer, specifically for:
Judge that the difference of described drive voltage signal and described reference voltage signal pace of change is whether in preset range, if output the first comparison signal;
Otherwise, judge whether the speed that described drive voltage signal changes is greater than the speed that described reference voltage signal changes, if output the second comparison signal; Otherwise output the 3rd comparison signal.
8. according to the interface driving circuit driving force Circuit tuning in claim 7, it is characterized in that, described adjuster specifically for:
When the comparison signal getting is the second comparison signal, output the first control signal, the drive current of controlling described interface reduces;
When the comparison signal getting is the 3rd comparison signal, output the second control signal, the drive current of controlling described interface increases.
9. according to the interface driving circuit driving force Circuit tuning in claim 6, it is characterized in that, the reference current signal that reference current generating circuit produces is adjustable signal.
10. according to the interface driving circuit driving force Circuit tuning in claim 7, it is characterized in that, also comprise:
The signal prompt device being connected with described slew rate comparer, for obtaining the comparison signal of described slew rate comparer output, when described comparison signal is the first comparison signal, output the first cue; When described comparison signal is second or during the 3rd comparison signal, output the second cue.
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| CN201410265152.4A CN104020808B (en) | 2014-06-13 | 2014-06-13 | A kind of interface driving circuit driving force method of adjustment and circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410265152.4A CN104020808B (en) | 2014-06-13 | 2014-06-13 | A kind of interface driving circuit driving force method of adjustment and circuit |
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| CN104020808A true CN104020808A (en) | 2014-09-03 |
| CN104020808B CN104020808B (en) | 2015-11-18 |
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| US20050128000A1 (en) * | 2003-12-15 | 2005-06-16 | Charles Parkhurst | Ultra fast, low noise voltage feedback operational amplifier with dynamic biasing |
| CN102243505A (en) * | 2011-07-07 | 2011-11-16 | 杭州矽力杰半导体技术有限公司 | Low-offset and fast-response voltage-controlled current source, control method and power circuit applying voltage-controlled current source |
| CN102571006A (en) * | 2010-12-30 | 2012-07-11 | 联咏科技股份有限公司 | Bias current control method for operational amplifier and driving circuit |
| CN103714863A (en) * | 2014-01-07 | 2014-04-09 | 上海华虹宏力半导体制造有限公司 | System and method for testing distribution of current of flash memory unit |
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2014
- 2014-06-13 CN CN201410265152.4A patent/CN104020808B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020158691A1 (en) * | 2001-03-30 | 2002-10-31 | Tim Blankenship | Slew rate enhancement circuit and method |
| US20050128000A1 (en) * | 2003-12-15 | 2005-06-16 | Charles Parkhurst | Ultra fast, low noise voltage feedback operational amplifier with dynamic biasing |
| CN102571006A (en) * | 2010-12-30 | 2012-07-11 | 联咏科技股份有限公司 | Bias current control method for operational amplifier and driving circuit |
| CN102243505A (en) * | 2011-07-07 | 2011-11-16 | 杭州矽力杰半导体技术有限公司 | Low-offset and fast-response voltage-controlled current source, control method and power circuit applying voltage-controlled current source |
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| CN104020808B (en) | 2015-11-18 |
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