CN107196648A - A kind of crystal-oscillator circuit - Google Patents
A kind of crystal-oscillator circuit Download PDFInfo
- Publication number
- CN107196648A CN107196648A CN201710394960.4A CN201710394960A CN107196648A CN 107196648 A CN107196648 A CN 107196648A CN 201710394960 A CN201710394960 A CN 201710394960A CN 107196648 A CN107196648 A CN 107196648A
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- China
- Prior art keywords
- crystal
- inductance
- electric capacity
- oscillator circuit
- circuit
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- 239000013078 crystal Substances 0.000 abstract description 16
- 230000010355 oscillation Effects 0.000 abstract description 7
- 230000004044 response Effects 0.000 abstract description 3
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L3/00—Starting of generators
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- Oscillators With Electromechanical Resonators (AREA)
Abstract
The invention provides a kind of crystal-oscillator circuit, belong to semiconductor integrated circuit technical field.The crystal-oscillator circuit includes：First resistor R1, the first inductance L1, the first electric capacity C1 and the second electric capacity C2；The first electric capacity C1, the first inductance L1, first resistor R1 be sequentially connected in series after as tie point, the crystal-oscillator circuit also include second resistance R2, the second inductance L2；Circuit connected in series after the second electric capacity C2 is in parallel with the second inductance L2 and second resistance R2 is as the second branch road, and the tie point is followed by input U with second branch circuit parallel connectionINWith output UOUTBetween end.The crystal-oscillator circuit of the present invention introduces the second inductance L2 and second resistance R2, the introducing of the second inductance and second resistance greatly reduces the difficulty of crystal oscillator starting of oscillation, accelerates the response speed of system on the basis of traditional crystal-oscillator circuit.
Description
Technical field
The invention belongs to semiconductor integrated circuit technical field, and in particular to a kind of crystal-oscillator circuit.
Background technology
Crystal oscillator abbreviation crystal oscillator, is to utilize the crystal wafer with piezo-electric effect to be made.This crystal microchip by
Mechanical oscillation can be produced during the effect of applied alternating field, when the frequency of alternating electric field and the identical intrinsic frequency of crystal, are shaken
It is dynamic just to become very strong, here it is the reaction of crystal resonant characteristic.Utilize this characteristic, it is possible to replace LC (lines with resonator
Circle and electric capacity) resonant tank, wave filter etc..Because resonator has, small volume, lightweight, reliability be high, frequency stability is high
The advantages of, it is applied in household electrical appliance and communication equipment.Crystal oscillator device is because with high frequency stability, therefore mainly
Used in requiring to make resonant element in the sufficiently stable oscillating circuit of frequency.
Traditional crystal-oscillator circuit as shown in figure 1, including：First resistor R1, the first inductance L1, the first electric capacity C1 and
Second electric capacity C2.First electric capacity C1, the first inductance L1, first resistor R1 are in parallel with the second electric capacity C2 after being sequentially connected in series, and are connected to defeated
Enter to hold UINWith output end UOUTBetween.
Above-mentioned traditional crystal-oscillator circuit has the shortcomings that difficult oscillation starting, the crystal oscillator Induction Peried of some frequencies
Several seconds have been even up to it even tens seconds, this is unacceptable in very Multiple system.
The content of the invention
To solve the technical problem of existing crystal-oscillator circuit difficult oscillation starting, the present invention is carried out to traditional crystal oscillator
Improve that there is provided a kind of fast crystal-oscillator circuit of starting of oscillation.
A kind of crystal-oscillator circuit, including：First resistor R1, the first inductance L1, the first electric capacity C1 and the second electric capacity C2；
The first electric capacity C1, the first inductance L1, first resistor R1 be sequentially connected in series after as tie point, the crystal-oscillator circuit
Also include second resistance R2, the second inductance L2；After the second electric capacity C2 is in parallel with the second inductance L2 and second resistance R2
Circuit connected in series as the second branch road, the tie point is followed by input U with second branch circuit parallel connectionINWith output UOUT
Between end.
The crystal-oscillator circuit of the present invention introduces the second inductance L2 on the basis of traditional crystal-oscillator circuit
With second resistance R2, the introducing of the second inductance and second resistance greatly reduces the difficulty of crystal oscillator starting of oscillation, accelerates and is
The response speed of system.
Brief description of the drawings
Fig. 1 is the electrical block diagram of traditional crystal oscillator；
Fig. 2 is the electrical block diagram of the crystal oscillator of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, with reference to embodiment and join
According to accompanying drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright scope.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring this
The concept of invention.
In order to solve the technical problem of traditional crystal oscillator difficult oscillation starting, the invention provides a kind of crystal oscillator electricity
Road, as shown in Fig. 2 including：First resistor R1, the first inductance L1, the first electric capacity C1 and the second electric capacity C2；First electric capacity
C1, the first inductance L1, first resistor R1 be sequentially connected in series after as tie point, the crystal-oscillator circuit also include second resistance
R2, the second inductance L2；Circuit connected in series conduct after the second electric capacity C2 is in parallel with the second inductance L2 and second resistance R2
Second branch road, the tie point is followed by input U with second branch circuit parallel connectionINWith output UOUTBetween end.
The crystal-oscillator circuit of the present invention introduces the second inductance L2 on the basis of traditional crystal-oscillator circuit
With second resistance R2, the introducing of the second inductance and second resistance greatly reduces the difficulty of crystal oscillator starting of oscillation, accelerates and is
The response speed of system.
It should be appreciated that the above-mentioned embodiment of the present invention is used only for exemplary illustration or explains the present invention's
Principle, without being construed as limiting the invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent substitution, improvement etc., should be included in the scope of the protection.In addition, appended claims purport of the present invention
Covering the whole changes fallen into scope and border or this scope and the equivalents on border and repairing
Change example.
Claims (1)
1. a kind of crystal-oscillator circuit, including：First resistor R1, the first inductance L1, the first electric capacity C1 and the second electric capacity C2；Institute
State after the first electric capacity C1, the first inductance L1, first resistor R1 are sequentially connected in series as tie point, it is characterised in that also including
Two resistance R2, the second inductance L2；Circuit string after the second electric capacity C2 is in parallel with the second inductance L2 and second resistance R2
Connection is followed by input U as the second branch road, the tie point with second branch circuit parallel connectionINWith output UOUTBetween end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710394960.4A CN107196648A (en) | 2017-05-30 | 2017-05-30 | A kind of crystal-oscillator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710394960.4A CN107196648A (en) | 2017-05-30 | 2017-05-30 | A kind of crystal-oscillator circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107196648A true CN107196648A (en) | 2017-09-22 |
Family
ID=59874481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710394960.4A Pending CN107196648A (en) | 2017-05-30 | 2017-05-30 | A kind of crystal-oscillator circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107196648A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117354A (en) * | 2009-12-31 | 2011-07-06 | 中国科学院微电子研究所 | Piezocrystal simulation engine |
| CN103152032A (en) * | 2013-02-28 | 2013-06-12 | 北京空间飞行器总体设计部 | Crystal oscillating circuit |
| CN204376845U (en) * | 2015-01-06 | 2015-06-03 | 南京理工海疆科技有限公司 | A kind of quartz oscillator |
| CN205249155U (en) * | 2015-12-25 | 2016-05-18 | 湖南进芯电子科技有限公司 | Cmos crystal oscillator |
| CN105959000A (en) * | 2016-04-22 | 2016-09-21 | 电子科技大学 | Memristor-based rapid start-up crystal oscillator |
| CN106067762A (en) * | 2016-06-15 | 2016-11-02 | 泰凌微电子（上海）有限公司 | The crystal-oscillator circuit of fast start-up |
-
2017
- 2017-05-30 CN CN201710394960.4A patent/CN107196648A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117354A (en) * | 2009-12-31 | 2011-07-06 | 中国科学院微电子研究所 | Piezocrystal simulation engine |
| CN103152032A (en) * | 2013-02-28 | 2013-06-12 | 北京空间飞行器总体设计部 | Crystal oscillating circuit |
| CN204376845U (en) * | 2015-01-06 | 2015-06-03 | 南京理工海疆科技有限公司 | A kind of quartz oscillator |
| CN205249155U (en) * | 2015-12-25 | 2016-05-18 | 湖南进芯电子科技有限公司 | Cmos crystal oscillator |
| CN105959000A (en) * | 2016-04-22 | 2016-09-21 | 电子科技大学 | Memristor-based rapid start-up crystal oscillator |
| CN106067762A (en) * | 2016-06-15 | 2016-11-02 | 泰凌微电子（上海）有限公司 | The crystal-oscillator circuit of fast start-up |
Non-Patent Citations (4)
| Title |
|---|
| 孔令荣等: ""Pierce 晶体振荡器电路的起振点分析"", 《计算机与数字工程》 * |
| 武振宇等: ""一种低功耗快速起振晶体振荡器"", 《微电子学》 * |
| 赵毅强等: ""低功耗低频快速起振电路的设计"", 《北京工业大学学报》 * |
| 鲍钰文等: ""一种高性能时钟晶体振荡器电路设计"", 《电子科技》 * |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170922 |
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| RJ01 | Rejection of invention patent application after publication |