CN103378852B - Control circuit and method for dynamically adjusting oscillation starting current of oscillation source - Google Patents
Control circuit and method for dynamically adjusting oscillation starting current of oscillation source Download PDFInfo
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- CN103378852B CN103378852B CN201210162186.1A CN201210162186A CN103378852B CN 103378852 B CN103378852 B CN 103378852B CN 201210162186 A CN201210162186 A CN 201210162186A CN 103378852 B CN103378852 B CN 103378852B
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- 230000010355 oscillation Effects 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 239000007858 starting material Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Abstract
The invention provides a control circuit and a method for dynamically adjusting oscillation source oscillation starting current, wherein the control circuit for dynamically adjusting the oscillation source oscillation starting current comprises a current controller for providing the oscillation starting current, a counter for generating a counting value, a comparator for triggering a sampling signal when the counting value reaches a preset reference value, and a detector for responding to the sampling signal to detect whether the oscillation source is stable so as to instruct the current controller to dynamically adjust the oscillation starting current. The control circuit and method of the invention provide the oscillation starting current to the oscillation source to generate the oscillation signal, and detect whether the oscillation source is stable to adjust the oscillation starting current, thereby minimizing the oscillation starting current to reduce power consumption.
Description
Technical field
The present invention is relevant a kind of control circuit and method, adjusts oscillation source starting of oscillation electricity especially with regard to one
The control circuit of stream and method.
Background technology
Many industrial products need oscillation source as the basis of circuit operation, especially precision instrument with greater need for
Stable oscillation source, to guarantee that precision instrument operates under the operating environment of safety.As it is shown in figure 1, mesh
Front common oscillation source is at integrated circuit (Integrated Circuit;IC) 10 built-in vibration starter 12, and
Oscillator signal is produced to the oscillator 14 outside IC 10, oscillator according to a fixing starting oscillation current Is
14 itself is passive device, such as quartz oscillator, the vibration letter that response vibration starter 12 provides
Number starting of oscillation feedback oscillation signal give vibration starter 12, thus by reciprocation therebetween until
Set up the oscillator signal OSC of burning voltage.Generally vibration starter 12 and the combination of oscillator 14
Being referred to as oscillation source 16, the oscillator signal OSC the most also oscillation source 16 produced calls oscillation source.If
Starting oscillation current Is is too low, and vibration starter 12 cannot make oscillator 14 stably starting of oscillation, in order to ensure energy
Set up stable oscillation source, it is known that technology is always preset starting oscillation current Is and is fixed on error permission
Higher limit near.On reality is applied, owing to excessive starting oscillation current Is cannot arbitrarily adjust, so that
Occur in the situation easily causing power dissipation in self-oscillating, have much room for improvement.
Summary of the invention
An object of the present invention, is to propose a kind of control circuit adjusting oscillation source starting oscillation current and side
Method.
An object of the present invention, is to propose a kind of control circuit reducing oscillation source power consumption and side
Method.
An object of the present invention, be to propose a kind of control circuit minimizing oscillation source starting oscillation current and
Method.
According to the present invention, the control circuit of a kind of dynamic adjustment oscillation source starting oscillation current comprises current controller
Thering is provided described starting oscillation current, counter produces count value, and comparator reaches default ginseng in described count value
Trigger sampled signal when examining value, and described in detector response, the described oscillation source of sampled signal detection is the most steady
Fixed to order described current controller dynamically to adjust described starting oscillation current.
According to the present invention, the control method of a kind of dynamic adjustment oscillation source starting oscillation current comprises generation count value,
Trigger sampled signal when described count value reaches default reference value, respond described sampled signal detection institute
State oscillation source the most stable dynamically to adjust described starting oscillation current.
Accompanying drawing explanation
Fig. 1 is the framework of known oscillation source；
Fig. 2 is the embodiment of the control circuit of the present invention；
Fig. 3 is the first embodiment of the control method of the present invention；And
Fig. 4 is the second embodiment of the control method of the present invention.
Drawing reference numeral:
10 integrated circuits
12 vibration starters
14 oscillators
16 oscillation sources
18 control circuits
20 current controllers
22 counters
24 comparators
26 detectors
Detailed description of the invention
Fig. 2 is according to embodiments of the invention, arranges control circuit 18, comprise electric current control in IC 10
Device 20 processed, connects vibration starter 12, it is provided that starting oscillation current Is, and counter 22 produces count value CT,
Comparator 24 linkage counter 22, using default reference value SET as the foundation of sample time, whenever
Just triggering sampled signal SMP when count value CT reaches reference value SET, detector 26 connects electric current control
Vibration starter 12 in device 20, comparator 24 and oscillation source 16 or oscillator 14, detector
26 response sampled signal SMP detecting oscillation sources 16 are the most stable, dynamically adjust with command current controller 20
Whole starting oscillation current Is, and according to dynamically adjusting the history of starting oscillation current Is, starting oscillation current Is is set in
Be enough to set up the minimum of a value in stable oscillation stationary vibration source, to reduce power consumption.Detect the most set up stable
Oscillation source, can judge from vibration starter 12 or oscillator 14 detection oscillator signal OSC.
Fig. 3 is the schematic diagram of the control method according to the present invention, and counter 22 counts clock pulse CLK and produces
Count value CT, reference value SET is preset as n, m, k, l, whenever count value CT reaches n, m, k
Or during l, comparator 24 will trigger sampled signal SMP, detector 26 responds sampled signal SMP inspection
Survey oscillation source is the most stable dynamically to be adjusted with command current controller 20 or fixes starting oscillation current Is, such as, scheme
Shown in 3, it is not detected by stable oscillation source when CT=n, m and k, so gradually command current control
Device 20 processed increases starting oscillation current Is, stable oscillation source detected when CT=l, thus command current control
Starting oscillation current Is fixed by device 20 processed.In this example, originally provide smaller starting oscillation current Is,
Because there is no oscillation source when CT=n, m and k, so detector 26 command current controller 20 every time
Increase starting oscillation current Is；Stable oscillation source, therefore command current controller 20 is detected when CT=l
Starting oscillation current Is is fixed on value now.
Fig. 4 is another schematic diagram of the control method according to the present invention, the same with Fig. 3, reference value SET
It is preset as n, m, k, l, so sampling letter can be triggered when count value CT reaches n, m, k or l
Number SMP, it is the most stable with command current control that detector 26 responds sampled signal SMP detection oscillation source
Device 20 dynamically adjusts starting oscillation current Is, and according to dynamically adjusting the history of starting oscillation current Is, it is judged that starting of oscillation electricity
Whether stream Is is the minimum of a value making oscillation source 16 stablize starting of oscillation, with fixing starting oscillation current Is.In the diagram,
Stable oscillation source all detected when CT=n and m, therefore cannot judge whether starting oscillation current Is is
Little value, the most gradually command current controller 20 reduces starting oscillation current Is, whether to judge starting oscillation current Is
For minimum of a value；Stable oscillation source it is not detected by, it is judged that the starting of oscillation of last adjustment will be replied when CT=k
Electric current Is, then command current controller 20 increases starting oscillation current Is；Detect again stable when CT=l
Oscillation source, it is judged that starting oscillation current Is now is the minimum current value that can produce stable oscillation stationary vibration source, then
Starting oscillation current Is is fixed on value now by command current controller 20.In this example, ratio is originally provided
Bigger starting oscillation current Is, has oscillation source when CT=n, m, so electricity ordered by detector 26 every time
Stream controller 20 reduces starting oscillation current Is；It is not detected by oscillation source, due to front dynamic when CT=k
The history adjusted is to reduce starting oscillation current Is, and therefore current command current controller 20 increases starting oscillation current Is,
Starting oscillation current Is to be returned to the setting value of last time；Stable oscillation source is detected again when CT=l,
Due to through once replying, it is judged that starting oscillation current Is for allowing the minimum of a value of operation, therefore orders electricity specifically
Starting oscillation current Is is fixed on value now by stream controller 20.
By the program of Fig. 3 or Fig. 4, control circuit 18 can starting oscillation current Is via dynamically adjusting and
It is set in a minimum of a value that can set up stable oscillation stationary vibration source, to reduce power consumption as far as possible.Preferably,
After fixing starting oscillation current Is, just counter 22, comparator 24 and detector 26 can be closed, to enter
One step saves electric energy.
The narration made for presently preferred embodiments of the present invention above is the purpose for illustrating, and is not intended to limit
The present invention is accurately disclosed form, based on above teaching or from embodiments of the invention study
It is possible for making an amendment or changing, and embodiment is for explaining orally the principle of the present invention and allowing and be familiar with this technology
Person utilizes the present invention to select and narration, the technological thought of the present invention in reality application with various embodiments
Attempt is determined by claim and equalization thereof.
Claims (16)
1. a control circuit for dynamic adjustment oscillation source starting oscillation current, described oscillation source contains vibration and starts
Device and oscillator effect interactively with each other produce oscillator signal, it is characterized in that, described control circuit comprises:
Current controller, connects described vibration starter, it is provided that described starting oscillation current；
Counter, produces count value；
Comparator, connects described counter, triggers sampling when described count value reaches default reference value
Signal；And
Detector, connects described current controller, described comparator and described oscillation source, takes described in response
Oscillation source described in sample signal detection is the most stable, to order described current controller dynamically to adjust described starting of oscillation
Electric current.
2. control circuit as claimed in claim 1, is characterized in that, described detector connects described vibration
Starter or described oscillator, the most stable to detect described oscillation source.
3. control circuit as claimed in claim 1, is characterized in that, electric current described in described detector order
Controller increases described starting oscillation current, to guarantee that oscillation source stablizes starting of oscillation.
4. control circuit as claimed in claim 1, is characterized in that, electric current described in described detector order
Controller reduces described starting oscillation current, to judge whether described starting oscillation current is to allow oscillation source stably rise
The minimum of a value shaken.
5. control circuit as claimed in claim 1, is characterized in that, described detector detect described in shake
Swing source when stablizing, order described current controller to fix described starting oscillation current.
6. control circuit as claimed in claim 5, is characterized in that, described counter, described comparator
And described detector cuts out after described starting oscillation current fixed by described current controller.
7. a control method for dynamic adjustment oscillation source starting oscillation current, described oscillation source contains vibration and starts
Device and oscillator effect interactively with each other produce oscillator signal, it is characterized in that, described control method comprises following
Step:
A) count value is produced；
B) the vibration situation detecting described oscillation source when described count value reaches default reference value is the most steady
Fixed；And
C) starting oscillation current of output extremely described oscillation source is dynamically adjusted according to the vibration situation of described oscillation source；
Wherein, after step C terminates, return to step B.
8. control method as claimed in claim 7, is characterized in that, it is described that described step B comprises detection
Vibration starter is the most stable to detect described oscillation source.
9. control method as claimed in claim 7, is characterized in that, it is described that described step B comprises detection
Oscillator is the most stable to detect described oscillation source.
10. control method as claimed in claim 7, is characterized in that, if institute being detected in described step C
State the non-stable oscillation stationary vibration of oscillation source, then increase the current value of described starting oscillation current.
11. control methods as claimed in claim 10, is characterized in that, if detecting in described step C
The stable oscillation stationary vibration of described oscillation source, then fix the current value of described starting oscillation current.
12. control methods as claimed in claim 7, is characterized in that, if institute being detected in described step C
State oscillation source stable oscillation stationary vibration, then carry out step D and reduce the current value of described starting oscillation current.
13. control methods as claimed in claim 12, is characterized in that, after step D, re-execute
Step B, to detect the vibration situation of described oscillation source.
14. control methods as claimed in claim 13, is characterized in that, if described vibration again being detected
Source stable oscillation stationary vibration, reduces the current value of described starting oscillation current the most again.
15. control methods as claimed in claim 13, is characterized in that, if detect described oscillation source without
Stable oscillation stationary vibration, then increase the current value of described starting oscillation current.
16. control methods as claimed in claim 15, is characterized in that, increase the electricity of described starting oscillation current
Flow valuve and after again detecting described oscillation source stable oscillation stationary vibration, the current value of fixing described starting oscillation current.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101114599 | 2012-04-24 | ||
| TW101114599A TWI501555B (en) | 2012-04-24 | 2012-04-24 | Control circuit and method for dynamically adjusting a source current for an oscillation source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103378852A CN103378852A (en) | 2013-10-30 |
| CN103378852B true CN103378852B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210162186.1A Active CN103378852B (en) | 2012-04-24 | 2012-05-23 | Control circuit and method for dynamically adjusting oscillation starting current of oscillation source |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103378852B (en) |
| TW (1) | TWI501555B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022264A (en) * | 2006-07-01 | 2007-08-22 | 珠海炬力集成电路设计有限公司 | Crystal oscillating circuit and gain control method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6606003B2 (en) * | 2001-06-26 | 2003-08-12 | Webtv Networks, Inc. | Error compensating voltage controlled oscillator |
| TW200524285A (en) * | 2004-01-09 | 2005-07-16 | Sunplus Technology Co Ltd | Crystal accelerated oscillator |
| CN101162888A (en) * | 2006-10-10 | 2008-04-16 | 奕力科技股份有限公司 | Oscillating device for adjustable oscillating frequency |
| US8073416B2 (en) * | 2007-10-25 | 2011-12-06 | Qualcomm Incorporated | Method and apparatus for controlling a bias current of a VCO in a phase-locked loop |
| TWI357721B (en) * | 2008-03-06 | 2012-02-01 | Holtek Semiconductor Inc | Oscillation tuning circuit and method |
| CN101282081B (en) * | 2008-03-11 | 2011-05-11 | 清华大学 | Oscillator circuit |
| US7786771B2 (en) * | 2008-05-27 | 2010-08-31 | Taiwan Semiconductor Manufacturing Company, Ltd. | Phase lock loop (PLL) with gain control |
| JP5263887B2 (en) * | 2009-04-22 | 2013-08-14 | フリースケール セミコンダクター インコーポレイテッド | Self-adjusting oscillator |
-
2012
- 2012-04-24 TW TW101114599A patent/TWI501555B/en active
- 2012-05-23 CN CN201210162186.1A patent/CN103378852B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022264A (en) * | 2006-07-01 | 2007-08-22 | 珠海炬力集成电路设计有限公司 | Crystal oscillating circuit and gain control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103378852A (en) | 2013-10-30 |
| TW201345160A (en) | 2013-11-01 |
| TWI501555B (en) | 2015-09-21 |
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