CN101090263A - Frequency switching method - Google Patents
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- CN101090263A CN101090263A CN 200710141384 CN200710141384A CN101090263A CN 101090263 A CN101090263 A CN 101090263A CN 200710141384 CN200710141384 CN 200710141384 CN 200710141384 A CN200710141384 A CN 200710141384A CN 101090263 A CN101090263 A CN 101090263A
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Abstract
A frequency switching method is used to make switching among a plurality of frequency signal sources each providing a specific frequency range covering multiple bands. The method includes steps of providing a target frequency data; selecting one of the frequency signal sources to output a first clock signal; generating a first frequency data according to the clock signal of the first frequency to compare with the target frequency data; outputting a second clock signal with the highest band of another one of the frequency signal sources possessing a frequency range higher than that of the selected frequency signal source when the target frequency data is greater than the first frequency data; and outputting the second clock signal with the lowest band of the selected frequency signal source when the target frequency data is smaller than the first frequency data. The invention can effectively and quickly finish corrective action of a plurality of pressure control shakers.
Description
Technical field
The present invention relates to a kind of frequency switching method, especially relate to the frequency switching method among a plurality of voltage-controlled oscillator (VCO)s that are applied to contain the different frequency scope.
Background technology
In communication system in the employed transceiver (transceiver), one of decision transceiver quality parameter excellence whether very big factor is exactly the quality of the radiofrequency signal that pulse signal producer produced of design in transceiver, and general typical case uses the pulse signal producer at the radio frequency frequency domain to be divided into: auto-excitation type variable oscillator (Self-Excited Variable-Frequency Oscillator), quartz oscillator (Crystal Oscillator) and frequency signal synthesizer (Frequency Synthesizer).
And present communication system electronic product, for example: Wireless LAN (wireless LAN), super wideband (ultra wideband, UWB), the electronic product of mobile communication or entertainment systems etc., all require high communication quality, high data transmission rate and more frequency range (Band) can be arranged in the frequency range scope.Comprehensive these restrictions, make in suchlike electronic product, must arrange in pairs or groups and use the radiofrequency signal generator that can meet the demand, just must use the frequency signal synthesizer that has big tuning range, just be enough to deal with the specification of various application.And design usually in the frequency signal synthesizer that in these electronic products, is possessed phase-locked loop (Phase Locked Loop is arranged, be called for short PLL) with frequency shift (FS) and phase deviation between elimination transmission end and receiving terminal, or deduct because frequency shift (FS) and the phase deviation that environmental impact (for example variation of ambient temperature) causes.
See also Fig. 1, it is the function block schematic diagram of phase-locked loop 101, comprise phase (Phase/Frequency Detector, be called for short PFD) 1010, (Voltage Control Oscillator is called for short: VCO) 1013 for charge pump (charge pump) 1011, loop filter (Loop Filter) 1012 and voltage-controlled oscillator (VCO).And phase locking is carried out at the reference burst signal of being received in phase-locked loop 101, and voltage-controlled oscillator (VCO) 1013 output feedback pulse signals are to phase 1010, phase 1010 is just exported the going up of representing between reference burst signal and feedback pulse signal of phase difference according to the phase difference between reference burst signal and feedback pulse signal and is counted/count down signal, count/number signal process charge pump 1011 and loop filter 1012 conversions down and go up, the voltage of output control at last is to voltage-controlled oscillator (VCO) 1013, and the phase of the feedback pulse signal of feasible output can continue to reach consistent with the phase of reference burst signal.
And the communication system electronic product can utilize the frequency signal synthesizer to carry out demodulation at present, and then the data-signal that is carried on the signal that it received come out to demodulation, and voltage-controlled oscillator (VCO) is played the part of considerable role in the process of whole demodulation, in the phase-locked loop that communication system electronic product is in the past possessed, usually has only the design of single voltage-controlled oscillator (VCO), but the design of single voltage-controlled oscillator (VCO) is used on the electronic product that needs big tuning range now, can cause the stability decline of communication system electronic product and the reduction of overall efficiency, therefore, in the phase-locked loop of communication system electronic product, need a plurality of voltage-controlled oscillator (VCO)s to finish the action of the feedback pulse signal of various different frequencies in the vast tuning range of output usually now.
See also Fig. 2 (a), it is to possess the phase-locked loop of a plurality of voltage-controlled oscillator (VCO)s function block schematic diagram 201 is arranged, comprise phase 2010, charge pump 2011, and outside the loop filter 2012, also having comprised having to utilize the enable signal (not shown) to come a plurality of voltage-controlled oscillator (VCO)s 2013 of open and close, 2014,2015,2016,2017,2018, and each voltage-controlled oscillator (VCO) 2013,2014,2015,2016,2017,2018 contain a small frequency scope and separately in order to contain a big frequency range jointly, for example the small frequency scope is 200MHz, and big frequency range is 950MHz to 2150MHz, therefore the frequency range of voltage-controlled oscillator (VCO) 2013 is 950MHz to 1150MHz, the frequency range of voltage-controlled oscillator (VCO) 2014 is 1150MHz to 1350MHz, the frequency range of voltage-controlled oscillator (VCO) 2015 is 1350MHz to 1550MHz, the frequency range of voltage-controlled oscillator (VCO) 2016 is 1550MHz to 1750MHz, the frequency range of voltage-controlled oscillator (VCO) 2017 is 1750MHz to 1950MHz, and the frequency range of voltage-controlled oscillator (VCO) 2018 is 1950MHz to 2150MHz.And all have a plurality of different frequency ranges (band) in each voltage-controlled oscillator (VCO), and be example with Fig. 2 (b), each voltage-controlled oscillator (VCO) can operate in 9 frequency ranges, and it changes its signal frequency according to received control voltage.
But because the operating frequency of voltage-controlled oscillator (VCO) and unstable, therefore after opening, circuit all needs to proofread and correct (calibration), and then voltage-controlled oscillator (VCO) can be operated near the appropriate location of frequency range (for example central point of each frequency range among Fig. 2 (b)), and how to finish the corrective action of a plurality of voltage-controlled oscillator (VCO)s efficiently fast, be topmost purpose of the present invention.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention discloses a kind of frequency switching method, is applied to contain among a plurality of frequency signal sources of different frequency scope, and each frequency signal source has a plurality of frequency ranges, and this method comprises the following steps: to provide the target frequency data; Select frequency signal source to export pulse signal; Produce the first frequency data and compare according to first pulse signal with the target frequency data; When target frequency data during, select the high band in the higher frequency signal source of frequency to export second pulse signal greater than the first frequency data; And, select the peak low band in the same frequency signal source to export second pulse signal when target frequency data during less than the first frequency data.Preferably, first pulse signal exported of frequency signal source is to belong to the pulse signal that high band produced in the frequency signal source.
Further, produce the second frequency data according to second pulse signal and the target frequency data compare; When target frequency data during, select the pulse signal output of the peak low band in the lower frequency signal source of frequency less than the second frequency data; And, select the pulse signal output of same frequency signal source medium frequency higher frequency band when target frequency data during greater than the second frequency data.
The present invention also discloses a kind of frequency switching method, is applied to contain among a plurality of frequency signal sources of different frequency scope, and each frequency signal source has a plurality of frequency ranges, and this method comprises the following steps: to provide the target frequency data; Select frequency signal source to export first pulse signal; Produce the first frequency data and the target frequency data compare according to first pulse signal; When target frequency data during, select the peak low band in the lower frequency signal source of frequency to export second pulse signal less than the first frequency data; And, select the high band in the same frequency signal source to export second pulse signal when target frequency data during greater than the first frequency data.
The present invention can finish the corrective action of a plurality of voltage-controlled oscillator (VCO)s effectively fast.
Description of drawings
The present invention is able to more deep understanding by following graphic and explanation:
Fig. 1 is a phase-locked loop function block schematic diagram.
Fig. 2 (a), Fig. 2 (b) are for possessing the phase-locked loop function block schematic diagram of a plurality of voltage-controlled oscillator (VCO)s.
Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) are the first preferred embodiment schematic flow sheet of the present invention.
Fig. 4 is a voltage-controlled oscillator (VCO) internal circuit configuration schematic diagram.
Fig. 5 (a), Fig. 5 (b), Fig. 5 (c) are the second preferred embodiment schematic flow sheet of the present invention.
Wherein, description of reference numerals is as follows:
Phase-locked loop 101 phase detectors 1011
Transmitting terminal 100 phase-locked loops 201
Voltage-controlled oscillator (VCO) 2013,2014,2015,2016,2017,2018
Frequency signal source 301,302,303
Voltage-controlled oscillator (VCO) 4 controlled switchs 401,402,403,404
Frequency signal source 501,502,503
Embodiment
For finishing the corrective action of a plurality of voltage-controlled oscillator (VCO)s effectively fast, as Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) just shown in frequency switching method be developed.Frequency switching method shown in Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) is the frequency switching method schematic flow sheet of the present invention's first preferred embodiment, can be applicable in order among a plurality of frequency signal sources (voltage-controlled oscillator (VCO) as described above) of containing the different frequency scope, each frequency signal source relates to the frequency range of a plurality of covering scope inequalities again.
For the special frequency channel of finding out suitable frequency signal source produces required frequency, the target frequency data at first are provided, for example be count value, by the method step shown in Fig. 3 (a), Fig. 3 (b), the special frequency channel that switches to suitable frequency signal source is finished corrective action then.
In step S1, provide the target frequency data; Then in step S2, in a plurality of frequency signal sources, select the proper handling point (for example controlling voltage is the pairing frequency range of median central point) of the high band in the frequency signal source to export to represent in this frequency signal source the pulse signal of high band; After producing frequency data (for example count value) according to this pulse signal, itself and target frequency data are compared (step S3); Judge that whether the target frequency data are greater than these frequency data (step S4); If the target frequency data are greater than these frequency data, then select to start the pulse signal output of the high band in the higher side frequency signal source of frequency, and its pulse signal of exporting is got back to step S3 and is continued to compare (step S5) with these target frequency data; If the target frequency data judge then that not greater than these frequency data whether the target frequency data are less than these frequency data (step S6); If the target frequency data, are then selected the pulse signal output (step S7) of the peak low band in the same frequency signal source less than these frequency data; If on behalf of these frequency data, the target frequency data then be consistent with these target frequency data and need not be adjusted (step S9) not less than these frequency data; Producing frequency data according to the pulse signal of being exported in step S7 medium frequency signal source also continues to compare (step S8) with the target frequency data; Judge that whether the target frequency data are greater than these frequency data (step S10); If the target frequency data, are then selected the pulse signal output (step S11) of the higher one-level frequency range in the same frequency signal source greater than these frequency data; If the target frequency data judge then that not greater than these frequency data whether the target frequency data are less than these frequency data (step S12); If the target frequency data less than these frequency data, then select the peak low band in the lower side frequency signal source of frequency to come output pulse signal (step S13), and then enter among the step S8 and compare; If the target frequency data are not less than these frequency data; These frequency data that then are illustrated in step S8 are consistent with the target frequency data and need not adjust.
Via the judgement of above-mentioned changing method, can find the certain frequency range in the pairing set specific frequency signal of the target frequency data source apace, and then finish the action of correction.
Because at target frequency data and this frequency data described in Fig. 3 (a), Fig. 3 (b) is different frequency count, this frequency count gets by the frequency signal wave form varies in the unit of account time (for example zero handing over the not in proper sequence or order number), after two frequency count are compared, carry out the switching of frequency range according to its result relatively.
Switching for can clearer understanding frequency can see also Fig. 3 (c) again, and it is that the first preferred embodiment frequency of frequency switching method of the present invention is switched schematic diagram.If be at the beginning at frequency signal source 301,302, select to belong in the frequency signal source 302 first pulse signal output (A frequency range as shown in FIG.) of high band in 303, and if the frequency count of calculating according to the pulse signal of A frequency range output is less than the target frequency data, its frequency switches to high band (B frequency range as shown in FIG.) in the side frequency signal source 301 by the high band of frequency signal source 302, otherwise, if the frequency count of calculating according to the pulse signal of A frequency range output is greater than the target frequency data, its frequency switches to peak low band (C frequency range as shown in FIG.) in the same frequency signal source 302 by the high band of frequency signal source 302.Come again, when the frequency count of calculating according to the pulse signal of C frequency range output still greater than the target frequency data, its frequency just switches to peak low band (D frequency range as shown in FIG.) in the side frequency signal source 301 by the peak low band of frequency signal source 302, otherwise, if the frequency count of calculating according to the pulse signal of C frequency range output is less than the target frequency data, its frequency is just switched to the successive bands of higher one-level in the same frequency signal source 302, E frequency range as shown in FIG. by the peak low band (C frequency range as shown in FIG.) of frequency signal source 302; Or be that unit switches with two frequency ranges once, be directly switch into F-band by the C frequency range as shown in FIG..
Fig. 4 shows the electrical block diagram of voltage-controlled oscillator (VCO) 4, because each voltage-controlled oscillator (VCO) 4 needs to work in a plurality of frequency ranges, therefore by control to the controlled switch among the figure 401,402,403,404, can allow the quantity of electric capacity-resistance in parallel change, and then make it switch to a certain specific frequency range, export needed pulse signal.
Fig. 5 (a), Fig. 5 (b), Fig. 5 (c) show the second preferred embodiment schematic flow sheet of the present invention.At first, provide target frequency data (step P1); Then in step P2, in a plurality of frequency signal sources, select the proper handling point (for example controlling the pairing frequency range of voltage median central point) of peak low band in the frequency signal source to export the pulse signal of representing peak low band in this frequency signal source; Produce frequency data (for example count value) back according to this pulse signal and compare (step P3) with the target frequency data; Judge that whether the target frequency data are less than these frequency data (step P4); If the target frequency data greater than these frequency data, then select to start the pulse signal output of the peak low band in the lower side frequency signal source of frequency, step P3 continues and the target frequency data compare (step P5) and its pulse signal of exporting is got back to; If the target frequency data judge then that not greater than these frequency data whether the target frequency data are greater than these frequency data (step P6); If the target frequency data, are then selected the pulse signal output (step P7) of the high band in the same frequency signal source greater than these frequency data; If on behalf of these frequency data, the target frequency data then be consistent with these target frequency data not greater than these frequency data, need not adjust (step P9); Producing frequency data according to the pulse signal of being exported in step P7 medium frequency signal source also continues to compare (step P8) with the target frequency data; Judge that whether the target frequency data are less than these frequency data (step P10); If the target frequency data, are then selected the pulse signal output (step P11) of the low one-level frequency range in the same frequency signal source less than these frequency data; If the target frequency data judge then that not less than these frequency data whether the target frequency data are greater than these frequency data (step P12); If the target frequency data greater than these frequency data, then select the high band in the higher side frequency signal source of frequency to come output pulse signal (step P13), and then enter and compare among the step P8; If the target frequency data are not greater than these frequency data; These frequency data that then are illustrated in step P8 are consistent with the target frequency data and need not adjust.
And, can find the special frequency channel in the pairing set specific frequency signal of the target frequency data source apace, and then finish the action of correction via above-mentioned changing method.
At target frequency data and this frequency data described in Fig. 5 (a), Fig. 5 (b) is different frequency count, after two frequency count are compared, carries out the switching of frequency range according to its result relatively.
Frequency handoff procedure for can clearer understanding present embodiment sees also Fig. 5 (c) again, and it is that the second preferred embodiment frequency of frequency switching method of the present invention is switched schematic diagram.If be at the beginning at frequency signal source 501,502, select to belong to peak low band in the frequency signal source 502 in 503 and come output pulse signal (A frequency range as shown in FIG.), and if the frequency count of calculating according to the pulse signal of A frequency range output is greater than the target frequency data, its frequency switches to peak low band (B frequency range as shown in FIG.) in the side frequency signal source 501 by the peak low band of frequency signal source 502, otherwise, if the first frequency data are greater than the target frequency data, its frequency switches to high band (C frequency range as shown in FIG.) in the same frequency signal source 502 by the peak low band of frequency signal source 502.Come again, when the frequency count of calculating according to the pulse signal of C frequency range output if still greater than the target frequency data, its frequency switches to high band (D frequency range as shown in FIG.) in the side frequency signal source 501 by the high band of frequency signal source 502, otherwise, if the frequency count of calculating according to the pulse signal of C frequency range output is less than the target frequency data, its frequency switches to the successive bands (E frequency range as shown in FIG.) of low one-level in the same frequency signal source 502 by the high band (C frequency range as shown in FIG.) of frequency signal source 502 or is that unit switches (being directly switch into F-band by the C frequency range as shown in FIG.) with two frequency ranges once.
In said method, owing to represent the count value of target frequency data may be between two pairing count values of successive bands, therefore end product relatively may replace switching (toggle) between two successive bands, preferably, can set a threshold value, when the number of times that alternately switches (toggle) two successive bands continuously in the comparison procedure surpasses this threshold value, just judge desired value between two successive bands, to be used as last correction result near the frequency range of desired value.
Comprehensive above technical descriptioon, can clearly find to utilize frequency switching method of the present invention to carry out the switching of frequency range, can be so that the communication system electronic product be proofreaied and correct adjustment the most fast because of phase deviation that environmental factor caused and frequency shift (FS) the time.The present invention must be appointed by those of ordinary skills and executes that the craftsman thinks and be to modify as all, but neither disengaging is as the claimed scope of the claim of enclosing.
Claims (10)
1. a frequency switching method is applied to contain among a plurality of frequency signal sources of different frequency scope, and each frequency signal source has a plurality of frequency ranges, and this method comprises the following steps:
The target frequency data are provided;
Select frequency signal source to export first pulse signal;
Produce the first frequency data according to this first pulse signal, and these first frequency data and this target frequency data are compared;
When this target frequency data during, select the high band in the frequency frequency signal source that this selected frequency signal source is high to export second pulse signal greater than these first frequency data; And
When this target frequency data during, select the peak low band in the same frequency signal source to export this second pulse signal less than these first frequency data.
2. frequency switching method as claimed in claim 1, wherein this first pulse signal of exporting of this frequency signal source is for belonging to the pulse signal that high band produced in this frequency signal source.
3. frequency switching method as claimed in claim 1 also comprises the following steps:
This second pulse signal of exporting according to the peak low band in this same frequency signal source produces the second frequency data, and these second frequency data and this target frequency data are compared;
When this target frequency data during, select the pulse signal output of the peak low band in the lower side frequency signal source of frequency less than these second frequency data; And
When this target frequency data during, select the pulse signal output of same frequency signal source medium frequency higher frequency band greater than these second frequency data.
4. frequency switching method as claimed in claim 3, wherein these first frequency data and the frequency data of this second frequency data for obtaining according to wave form varies according to this first pulse signal and this second pulse signal, wherein these target frequency data are the target frequency count value, these first frequency data can correspondence go out the first frequency count value, and these second frequency data can correspondence go out the second frequency count value.
5. frequency switching method as claimed in claim 1, wherein said a plurality of frequency signal sources are produced by a plurality of voltage-controlled oscillator (VCO).
6. a frequency switching method is applied to contain among a plurality of frequency signal sources of different frequency scope, and each frequency signal source has a plurality of frequency ranges, and this method comprises the following steps:
The target frequency data are provided;
Select frequency signal source to export first pulse signal;
Produce the first frequency data according to this first pulse signal, and these first frequency data and this target frequency data are compared;
When this target frequency data during, select the peak low band in the frequency frequency signal source that this selected frequency signal source is low to export second pulse signal less than these first frequency data; And
When this target frequency data during, select the high band in the same frequency signal source to export this second pulse signal greater than these first frequency data.
7. frequency switching method as claimed in claim 6, wherein this first pulse signal of exporting of this frequency signal source belongs to the pulse signal that peak low band produces in this frequency signal source.
8. frequency switching method as claimed in claim 6 also comprises the following steps:
This second pulse signal of exporting according to the high band in this same frequency signal source produces the second frequency data, and these second frequency data and this target frequency data are compared;
When this target frequency data during, select the pulse signal output of the high band in the higher frequency signal source of frequency greater than these second frequency data; And
When this target frequency data during, select the lower pulse signal output of same frequency signal source Mid Frequency less than these second frequency data.
9. frequency switching method as claimed in claim 6, the frequency data that obtain for wave form varies of these first frequency data and this second frequency data wherein according to this first pulse signal and this second pulse signal, wherein these target frequency data are the target frequency count value, these first frequency data can correspondence go out the first frequency count value, and these second frequency data can correspondence go out the second frequency count value.
10. frequency switching method as claimed in claim 6, wherein said a plurality of frequency signal sources are produced by a plurality of voltage-controlled oscillator (VCO)s.
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| US82182806P | 2006-08-09 | 2006-08-09 | |
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| CN101488036B (en) * | 2008-01-15 | 2011-07-20 | 盛群半导体股份有限公司 | Non-surge frequency switching mechanism and method thereof |
| CN102136716A (en) * | 2010-09-08 | 2011-07-27 | 上海岩芯电子科技有限公司 | Grid frequency detection method based on phase locked loop technology |
| CN102170288A (en) * | 2011-04-25 | 2011-08-31 | 上海迦美信芯通讯技术有限公司 | A reusable phase-locked loop low-pass filter |
| CN103036559A (en) * | 2011-09-28 | 2013-04-10 | 晨星软件研发(深圳)有限公司 | Phase locked loop and alignment method of relevant phase positions |
| CN103916203A (en) * | 2013-01-07 | 2014-07-09 | 晨星软件研发(深圳)有限公司 | Timing sequence recovery device and method |
| CN104702271A (en) * | 2013-12-10 | 2015-06-10 | 展讯通信（上海）有限公司 | Phase-locked loop circuit and calibration method for characteristic curves of voltage-controlled oscillator |
| CN106130544A (en) * | 2016-06-15 | 2016-11-16 | 上海兆芯集成电路有限公司 | Automatically band calibration method and system |
| CN106170920A (en) * | 2014-04-11 | 2016-11-30 | 高通股份有限公司 | Single phase-locked loop is utilized to lock multiple voltage controlled oscillators |
| CN107005244A (en) * | 2017-02-08 | 2017-08-01 | 香港应用科技研究院有限公司 | Reduction by overflowing counter counts the gain calibration for the direct modulation synthesizer searched for using look-up table |
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| US6806786B1 (en) * | 2001-05-15 | 2004-10-19 | Rf Micro Devices, Inc. | Phase-locked loop with self-selecting multi-band VCO |
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| CN101488036B (en) * | 2008-01-15 | 2011-07-20 | 盛群半导体股份有限公司 | Non-surge frequency switching mechanism and method thereof |
| CN102136716A (en) * | 2010-09-08 | 2011-07-27 | 上海岩芯电子科技有限公司 | Grid frequency detection method based on phase locked loop technology |
| CN102170288A (en) * | 2011-04-25 | 2011-08-31 | 上海迦美信芯通讯技术有限公司 | A reusable phase-locked loop low-pass filter |
| CN102170288B (en) * | 2011-04-25 | 2013-01-09 | 上海迦美信芯通讯技术有限公司 | A reusable phase-locked loop low-pass filter |
| CN103036559B (en) * | 2011-09-28 | 2015-11-11 | 晨星软件研发(深圳)有限公司 | Phase-locked loop and relevant phase alignment method |
| CN103036559A (en) * | 2011-09-28 | 2013-04-10 | 晨星软件研发(深圳)有限公司 | Phase locked loop and alignment method of relevant phase positions |
| CN103916203B (en) * | 2013-01-07 | 2016-08-17 | 晨星软件研发(深圳)有限公司 | Time sequence reply device and method |
| CN103916203A (en) * | 2013-01-07 | 2014-07-09 | 晨星软件研发(深圳)有限公司 | Timing sequence recovery device and method |
| CN104702271A (en) * | 2013-12-10 | 2015-06-10 | 展讯通信（上海）有限公司 | Phase-locked loop circuit and calibration method for characteristic curves of voltage-controlled oscillator |
| CN104702271B (en) * | 2013-12-10 | 2018-06-05 | 展讯通信（上海）有限公司 | The characteristic calibration method of phase-locked loop circuit and voltage controlled oscillator |
| CN106170920A (en) * | 2014-04-11 | 2016-11-30 | 高通股份有限公司 | Single phase-locked loop is utilized to lock multiple voltage controlled oscillators |
| CN106130544A (en) * | 2016-06-15 | 2016-11-16 | 上海兆芯集成电路有限公司 | Automatically band calibration method and system |
| CN107005244A (en) * | 2017-02-08 | 2017-08-01 | 香港应用科技研究院有限公司 | Reduction by overflowing counter counts the gain calibration for the direct modulation synthesizer searched for using look-up table |
| CN107820681A (en) * | 2017-02-08 | 2018-03-20 | 香港应用科技研究院有限公司 | The Fast Coarse mediation accurate adjustment calibration of the synthesizer of more calibration curves in target window |
| US9954543B1 (en) | 2017-02-08 | 2018-04-24 | Hong Kong Applied Science and Technology Research Institute Company, Limited | Fast coarse tune and fine tune calibration for a synthesizer by multi-curve calibration within a target window |
| WO2018145318A1 (en) * | 2017-02-08 | 2018-08-16 | Hong Kong Applied Science and Technology Research Institute Company Limited | Fast coarse tune and fine tune calibration for synthesizer by multi-curve calibration within target window |
| CN107005244B (en) * | 2017-02-08 | 2020-05-05 | 香港应用科技研究院有限公司 | Gain calibration of direct modulation synthesizer using look-up table search by decreasing count of overflow counter |
| CN107820681B (en) * | 2017-02-08 | 2021-03-02 | 香港应用科技研究院有限公司 | Fast coarse and fine tuning calibration of multi-curve calibrated synthesizer within target window |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101090263B (en) | 2010-06-02 |
| TWI333742B (en) | 2010-11-21 |
| TW200818712A (en) | 2008-04-16 |
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