CN1567710A - An oscillator characteristic curve correcting system and equipment - Google Patents
An oscillator characteristic curve correcting system and equipment Download PDFInfo
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- CN1567710A CN1567710A CN 03146626 CN03146626A CN1567710A CN 1567710 A CN1567710 A CN 1567710A CN 03146626 CN03146626 CN 03146626 CN 03146626 A CN03146626 A CN 03146626A CN 1567710 A CN1567710 A CN 1567710A
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Abstract
The invention discloses a vibrator characteristic curve correcting system and device, using a correcting device, judging if it needs to change the characteristic curve of the vibrator, outputting a correction signal to a correcting circuit, and then by changing the characteristic of the correcting circuit, selecting the characteristic curve of the vibrator. It can automatically correct the frequency characteristic curve of the vibrator and avoid the manufacturing process and temperature from influencing a frequency synthesizer. And as delivering products, it needs no artificial correction, and thus can reduce the indeterminacy of artificial correction and also artificial cost. Besides, it can correct the frequency characteristic curve at any time, and continues assuring the product quality after delivering the products.
Description
Technical field
The present invention relates to a kind of oscillator character curvature correction system and device, particularly a kind of means for correcting that utilizes, judge whether to need to change the characteristic curve of this oscillator, export a correction signal and give correcting circuit, by changing the correcting circuit circuit characteristic, and then select the characteristic oscillator character curvature correction system and the device of this oscillator.
Background technology
Oscillator is a kind of assembly that generally uses, and on wireless telecommunication system or radio frequency system, or even the circuit of the time of following or enumeration correlation can be found its existence.Progress along with science and technology, the human frequency of using is also just more and more high, as on wireless telecommunication system or radio frequency system, need a high frequency voltage controlled oscillator (vo1tage control oscillator, VCO) with frequency synthesizer (Frequency Synthesizer) to produce a carrier wave.See also Fig. 1, this is the characteristic job description figure of high frequency voltage controlled oscillator, and voltage controlled oscillator can be according to the voltage of input signal, exports find out a pairing frequency in characteristic curve after.Yet the characteristic curve of voltage controlled oscillator can influence with processing procedure and temperature, causes frequency synthesizer can't pin correct frequency, and this can become more serious under high-frequency operation.
In order to overcome the influence to pressuring controlling oscillator frequency of processing procedure and temperature, two kinds of practices are arranged at present: a kind of is the frequencies operations scope that increases voltage controlled oscillator, makes its frequency range can contain the influence that processing procedure and temperature are caused.That is to say that the FH that allows among Fig. 1 and the spacing of FL become big.But this can cause the phase noise (Phase Noise) of voltage controlled oscillator and frequency synthesizer to rise, the output signal quality is descended, see also Fig. 2 A, power was to the performance plot of frequency when this was perfect condition, general design can wish power to frequency can be as shown in the figure the characteristic of pulse (impulse) formula, see also Fig. 2 B, behind this operating frequency range for the increase voltage controlled oscillator, power is to the performance plot of frequency, and the situation that obviously has power attenuation takes place, and is unfavorable for the application of system.
Another method is to add several switch capacitors (switch capacitor) at voltage controlled oscillator, and control with switch, the load that utilizes electric capacity to cause changes the frequency range of voltage controlled oscillator, see also Fig. 3, this is three performance diagrams that connect varying number electric capacity, this method is exactly the quantity by manual adjustment electric capacity, changes characteristic position, chooses an optimal curve at last.Though such way can reduce the operating frequency range with voltage controlled oscillator, avoid the phase noise of frequency synthesizer to rise, but need people's manual adjustment of working before each shipment, suitable is loaded down with trivial details, and just no longer adjust after the shipment, move even operational environment changes ambassador's characteristic curve, also can't adjust again.
In sum, the method for adjustment operating frequency can make the signal quality variation, the follow-up running of the system that influences; Can only use once, its shortcoming is respectively arranged and use capacitance compensation to change characteristic method, therefore need a kind of new method to improve its shortcoming.
Summary of the invention
Main purpose of the present invention provides a kind of oscillator character curvature correction system and and device from dynamic(al) correction.
Secondary objective of the present invention provides a kind of oscillator character curvature correction system of can proofreading and correct at any time and reaches and device.
Oscillator character curvature correction of the present invention system comprises: a power supply device produces a control signal; One oscillator connects described power supply device, receives described control signal and gives birth to an output frequency according to the characteristic curve of described oscillator; One means for correcting connects described power supply device, receives described control signal, judges whether to need to change the characteristic curve of described oscillator, exports a correction signal; One correcting circuit, with described oscillator coupling, according to described correction signal, the circuit characteristic of change own, and then the characteristic curve of change oscillator.
In order further to understand feature of the present invention, purpose and function, the present invention is described in detail with instantiation below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the characteristic job description figure of voltage controlled oscillator;
Power was to the performance plot of frequency when Fig. 2 A was perfect condition;
Fig. 2 B is that power is to the performance plot of frequency after increasing the operating frequency range of voltage controlled oscillator;
Fig. 3 is three performance diagrams that connect varying number electric capacity;
Fig. 4 is the Organization Chart of system of the present invention;
Fig. 5 is a specific embodiment of means for correcting of the present invention.
Description of reference numerals: 1-power supply device; The 10-control signal; The 2-oscillator; The 20-output frequency; The 3-means for correcting; The 30-correction signal; The 31-comparison means; The 310-state parameter; 311-first comparator; 312-second comparator; The 32-adjusting device; The 4-correcting circuit; 5-feedback control device.
Embodiment
See also the Organization Chart of system of the present invention shown in Figure 4.System of the present invention comprises:
One power supply device 1 produces a control signal 10; In one embodiment, power supply device 1 can produce a control signal according to a reference frequency 11 and a feedback frequency 12.In another embodiment, power supply device can be made up of a frequency comparator and low pass filter, and when frequency synthesizer pins a certain frequency (PLL lock), low pass filter can be exported a control signal;
One oscillator 2 connects this power supply device 1, receives this control signal 10 and generates an output frequency 20 according to the characteristic curve of this oscillator 2; Oscillator can be selected the output frequency 20 corresponding with this control signal according to the characteristic curve as Fig. 1 or Fig. 3, uses for late-class circuit.In one embodiment, this oscillator 2 can be voltage controlled oscillator (voltage control oscillator, VCO).This moment, this control signal 10 was a voltage signal.
One means for correcting 3 connects this power supply device 1, receives this control signal 10, judges whether to need to change the characteristic curve of this oscillator 2, exports a correction signal 30.Means for correcting 3 can judge according to a condition whether characteristic curve is suitable according to control signal 10.In one embodiment, is the voltage that can judge control signal 10 in a certain particular range? if yes, the expression operating frequency need not be adjusted characteristic curve in normal range (NR); If not, then need to adjust and allow characteristic curve, operating frequency can be dropped in the normal range (NR).See also a specific embodiment of means for correcting of the present invention 3 shown in Figure 5, means for correcting 3 comprises:
One comparison means 31 receives a control signal 10, compares with a condition, produces a state parameter 310; In one embodiment, this comparison means can be made up of 311,312 of two comparators, first comparator 311 compares this control signal 10 and the upper bound of voltage normal range of operation, second comparator 312 compares the lower bound of this control signal 10 with the voltage normal range of operation, and the comparative result integration with two devices becomes state parameter 310 at last.
One adjusting device 32 connects this comparison means 31, adjusts a count value according to this state parameter 310, and produces a correction signal 30; Adjusting device 32 can be a counter, supposes that correction signal 30 default values are 8, judges when state parameter and just lowers the correction signal value as 7 when too high, and state parameter was judged just increases the correction signal value as 9, if suitably just do not change the correction signal value when low.
And
One correcting circuit 4, with 2 couplings of this oscillator, according to this correction signal 30, the circuit characteristic of change own, and then influence the characteristic curve of this oscillator 2.In one embodiment, correcting circuit 4 is composed in parallel by several electric capacity, and with oscillator 2 coupling, correcting circuit 4 can increase, reduce or not change the electric capacity number of parallel connection according to correction signal 30, to change the circuit characteristic of oscillator 2, and then influence the position of oscillator character curve, reach purpose from dynamic(al) correction.Usually, correcting circuit 4 electric capacity number in parallel the more, the hop count of being adjusted will be the more, control also just can be meticulousr.Correcting circuit 4 itself can in build in the oscillator, also can external additional mode and oscillator coupling.
In a preferred embodiment of system of the present invention, also comprise a feedback control device 5, connect this oscillator 2, receive this output frequency 20, carry out feedback control, produce this feedback frequency 12 to this power supply device 1.Make power supply device 1 change control signal 10, except that can reaching feedback control, also can receive the effect of monitoring at any time according to reference frequency 11 and feedback frequency 12.In one embodiment, feedback control device 5 can be a prescaler (prescaler).
In sum, the present invention is based on the spirit of aforementioned second method, improved.Utilize the present invention, can avoid the influence of processing procedure and temperature from the frequency characteristics of dynamic(al) correction oscillator to frequency synthesizer.And just need not remove and can lower the uncertainty of artificial adjustment as the artificial adjustment of need during shipment, can also lower cost of labor.In addition, utilize the present invention can proofread and correct the frequency characteristics of oscillator at any time, more can after shipment, continue to guarantee the quality of product.。
The above only is preferred embodiment of the present invention, can not limit the scope of the invention with this.All equalizations of doing according to claim of the present invention change and modify, will not lose main idea of the present invention place, also do not break away from the spirit and scope of the present invention, all should be considered as further enforcement of the present invention.
Claims (9)
1, a kind of oscillator character curvature correction system comprises:
One power supply device produces a control signal;
One oscillator connects described power supply device, receives described control signal and gives birth to an output frequency according to the characteristic curve of described oscillator;
One means for correcting connects described power supply device, receives described control signal, judges whether to need to change the characteristic curve of described oscillator, exports a correction signal;
And
One correcting circuit, with described oscillator coupling, according to described correction signal, the circuit characteristic of change own, and then the characteristic curve of change oscillator.
2, oscillator character curvature correction as claimed in claim 1 system also comprises a feedback control device, connects described voltage controlled oscillator, receives described output frequency, carries out feedback control, produces a feedback frequency to described power supply device.
3, oscillator character curvature correction as claimed in claim 1 system, wherein said means for correcting comprises:
One comparison means receives described control signal, compares with a condition, produces a state parameter; And
One adjusting device connects described comparator, according to described state parameter, adjusts a count value, and produces described correction signal.
4, oscillator character curvature correction as claimed in claim 1 system, wherein said correcting circuit is made up of at least one electric capacity.
5, oscillator character curvature correction as claimed in claim 1 system, wherein said correcting circuit is made up of several electric capacity institute in parallel.
6, oscillator character curvature correction as claimed in claim 1 system is built in the described oscillator in the wherein said correcting circuit.
7, a kind of oscillator character curvature correction device, by changing the described oscillator character curve of described pierce circuit characteristic correction, described oscillator means for correcting comprises:
One comparison means receives a control signal, compares with a condition, produces a state parameter;
One adjusting device connects described comparator, according to described state parameter, adjusts a count value, and produces a correction signal;
And
One correcting circuit, with the coupling of described oscillator, according to described correction signal, the circuit characteristic of change own, and then change the characteristic curve of described oscillator.
8, oscillator character curvature correction device as claimed in claim 7, wherein said correcting circuit is composed in parallel by several electric capacity.
9, oscillator character curvature correction device as claimed in claim 7 is built in the described oscillator in the wherein said correcting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03146626 CN1567710A (en) | 2003-07-10 | 2003-07-10 | An oscillator characteristic curve correcting system and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03146626 CN1567710A (en) | 2003-07-10 | 2003-07-10 | An oscillator characteristic curve correcting system and equipment |
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| CN1567710A true CN1567710A (en) | 2005-01-19 |
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| CN 03146626 Pending CN1567710A (en) | 2003-07-10 | 2003-07-10 | An oscillator characteristic curve correcting system and equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217190A (en) * | 2008-10-09 | 2011-10-12 | 阿尔特拉公司 | Techniques for providing option conductors to connect components in an oscillator circuit |
| CN103378856A (en) * | 2012-04-26 | 2013-10-30 | 矽统科技股份有限公司 | Automatic self-calibrated oscillation method and apparatus using the same |
| CN103731139A (en) * | 2012-10-12 | 2014-04-16 | 扬智科技股份有限公司 | Phase-locked loop device |
| CN114217124A (en) * | 2021-11-09 | 2022-03-22 | 河南九域腾龙信息工程有限公司 | Fusion terminal with loop inspection function |
-
2003
- 2003-07-10 CN CN 03146626 patent/CN1567710A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217190A (en) * | 2008-10-09 | 2011-10-12 | 阿尔特拉公司 | Techniques for providing option conductors to connect components in an oscillator circuit |
| CN102217190B (en) * | 2008-10-09 | 2015-12-09 | 阿尔特拉公司 | For providing alternative conductor with the technology of the parts in connection oscillator circuit |
| CN103378856A (en) * | 2012-04-26 | 2013-10-30 | 矽统科技股份有限公司 | Automatic self-calibrated oscillation method and apparatus using the same |
| CN103378856B (en) * | 2012-04-26 | 2015-12-23 | 矽统科技股份有限公司 | The method of automatic calibration oscillator signal and device thereof |
| CN103731139A (en) * | 2012-10-12 | 2014-04-16 | 扬智科技股份有限公司 | Phase-locked loop device |
| CN103731139B (en) * | 2012-10-12 | 2017-05-24 | 扬智科技股份有限公司 | Phase-locked loop device |
| CN114217124A (en) * | 2021-11-09 | 2022-03-22 | 河南九域腾龙信息工程有限公司 | Fusion terminal with loop inspection function |
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Owner name: ALI CORPORATION Free format text: FORMER OWNER: YANGZHI SCIENCE + TECHNOLOGY CO. LTD. Effective date: 20041112 |
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Effective date of registration: 20041112 Address after: Taiwan, China Applicant after: Ali Corporation Address before: Taiwan, China Applicant before: Yangzhi Science & Technology Co., Ltd. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |