CN105158579B - The method that silicon tuner RF FILTER are detected automatically - Google Patents
The method that silicon tuner RF FILTER are detected automatically Download PDFInfo
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- CN105158579B CN105158579B CN201510543485.3A CN201510543485A CN105158579B CN 105158579 B CN105158579 B CN 105158579B CN 201510543485 A CN201510543485 A CN 201510543485A CN 105158579 B CN105158579 B CN 105158579B
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Abstract
The invention discloses a kind of methods that silicon tuner RF FILTER are detected automatically, RF FILTER frequency-selecting ranges are read by controlling iic bus, it is compared judgement with the frequency-selecting frequency departure range of setting, it feeds back judging result by display interface, and can determine it is that there are problems for which external inductance by the result.So as to reduce equipment and human resources input of the television manufacturer for RF FILTER detections, production cost is reduced, production efficiency is improved, improves product quality.
Description
Technical field
The present invention relates to RF FILTER detection technique fields, and in particular to a kind of silicon tuner RF FILTER are detected automatically
Method.
Background technology
RF FILTER are the frequency-selective networks in tuner, at present generally by tunable capacitor built in tuner chip with it is outer
The LC resonance filter that selecting frequency inductance is constituted, realizes each frequency range frequency-selecting.To ensure frequency-selective network performance, from tuner VHF to
The corresponding frequency ranges of UHF, frequency-selecting filter should ensure that each wave band can work normally.But due to inductance manufacturing process
Limitation, inductance sensibility reciprocal generally existing deviation, consistency is relatively hard to keep, while parasitic element (such as SMD that PCB layout is brought unavoidably
Series resistance) it can also influence the selectivity of filter.If frequency-selecting filter operation irregularity, pass through subjectivity in complete machine scheduling and planning
Judge not noticeable, but can be embodied in tuner performance test index of correlation, cause test failure.
To solve the problems, such as this, traditional CAN TUNER device productions manufacturer can all put into high-frequency test equipment, each is high
It can all be directed to RF FILTER frequency-selecting ranges before the manufacture of frequency head and carry out strict inspection, to judge inductance quality, can just go out after qualified
Factory.With advances in technology, liquid crystal television mainboard more uses onboard silicon Tuner schemes, tuner chip and choosing at present
Frequency inductance is all integrated on mainboard, and RF FILTER selectivity and inductance consistency detection need to carry out in TV set core debugging.It is right
For television manufacturer, high-frequency detection equipment and the input of testing staff need to be increased, increase production cost, reduce production efficiency.
Invention content
The present invention overcomes the deficiencies in the prior art, provide a kind of method that silicon tuner RF FILTER are detected automatically, use
There is technical issues that in solving existing detection mode.
In view of the above problem of the prior art, according to one aspect of the present disclosure, the present invention uses following technology
Scheme：
A kind of method that silicon tuner RF FILTER are detected automatically, it includes：
I) pre-set the frequency-selecting frequency departure range of RF FILTER；
II) read actual RF FILTER frequency-selecting ranges in TUNER chip registers；
III) frequency-selecting frequency that the actual RF FILTER frequency-selectings range of reading is pre-set into RF FILTER with described
Rate deviation range is compared, for judging whether frequency-selecting range and/or the peripheries Tuner frequency-selecting inductance meet design requirement.
In order to which the present invention is better achieved, further technical solution is：
An embodiment according to the present invention presets frequency-selecting range to 49.75MHz-863.25MHz subsection setups.
Another embodiment according to the present invention, the subsection setup include VHF LOW, VHF HIGH, UHF LOW,
Totally 4 sections of frequency-selecting frequency ranges, each frequency-selecting frequency range correspond to a band limits to UHF HIGH respectively.
Another embodiment according to the present invention, the TUNER RF frequency-selectings inductance of periphery 4 integrate variable with chip interior
Capacitance constitutes 4 LC resonance filters, the resonance filter and default frequency-selecting frequency range VHF LOW, VHF HIGH, UHF LOW,
UHF HIGH are one-to-one relationship.
Another embodiment according to the present invention, the frequency-selecting frequency range separately include Begin-band Frequency and
End-band Frequency totally 8 Frequency points, collectively form 4 sections of band logical frequency-selecting filters.
The present invention can also be：
Another embodiment according to the present invention, it is further comprising the steps of：
1) Tuner is initialized
Master chip reads tuner address by iic bus, and then sending out Tuner_AUTO_CHECK control commands makes tune
Humorous device enters Auto-Sensing Mode, detection tuner status indicator position, and feeds back testing result by display interface；
2) bandpass filter virtual condition register assignment
8 integer functions are defined, are respectively used to store 8 actual condition values read from Tuner registers, initial value
It is set as 0 entirely；In addition 8 floating-point type functions are defined, 4 actual Begin-band of bandpass filter of storage are respectively used to
Frequency and End-band Frequency, initial value are set as 0.0 entirely；First, software enters Tuner shapes by iic bus
State device address, reads the value in first status register address, which corresponds to the Begin-band of bandpass filter VHF LOW
Then the value of the register is assigned to the integer function 1 of definition by Frequency virtual conditions；It is suitable to next proceed through iic bus
Sequence reads other 7 bandpass filters status register numerical value, is assigned to other 7 integer functions respectively；
3) bandpass filter -3dB cutoff frequencies calculate
According to the difference that bandpass filter is segmented, 8 kinds of algorithms are defined, according to practical in the Tuner status registers of reading
Value calculates separately the -3dB cutoff frequencies of VHF LOW, VHF HIGH, UHF LOW, UHF HIGH bandpass filters, respectively assignment
To 8 floating-point functions of definition；
4) practical bandpass filter sets bandpass filter multilevel iudge with interior
According to software algorithm and the value of read status register, calculates the actual bandpass filter -3dB of Tuner and cut
Only frequency, and it is compared judgement with preset standard cutoff frequency, and judging result is returned respectively, if practical cutoff frequency is whole
It is marked with inside within the scope of quasi- cutoff frequency, then it is assumed that RF FILTER are qualified, on the contrary then think unqualified；
5) it will determine that result is fed back or shown.
Compared with prior art, one of beneficial effects of the present invention are：
A kind of method that silicon tuner RF FILTER are detected automatically of the present invention reduces TV production firm to tuning
The input of device frequency-selecting filter detection device only need to execute the corresponding of RF FILTER in movement debugging process according to the present invention
Detection, you can be accurately judged to the performance of each section of filter, and judge chip periphery frequency-selecting inductance whether in deviation model accordingly
In enclosing, also guidance foundation can be provided for the repair and replacement of single device.
Description of the drawings
Illustrate present specification embodiment or technical solution in the prior art in order to clearer, it below will be to embodiment
Or attached drawing needed in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the reference to some embodiments in present specification, for those skilled in the art, what is do not made the creative labor
In the case of, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 shows RF FILTER detects schematic diagrams according to an embodiment of the invention.
Specific implementation mode
The present invention is described in further detail with reference to embodiment, embodiments of the present invention are not limited thereto.
Shown in Figure 1, a kind of method that silicon tuner RF FILTER inductance detects automatically is read by entering iic bus
Actual RF FILTER frequency-selecting ranges in TUNER chip registers are taken, and are compared with inner setting frequency-selecting range, are judged
Whether frequency-selecting range meets design requirement.
And the comparison result of frequency-selecting range is set according to the practical frequency-selecting ranges of RF FILTER and software, it can determine whether Tuner
Whether peripheral frequency-selecting inductance meets design requirement.
Due to difference between tuner solution manufacturer, RF FILTER segmentations are also different.By tuner RF in the present embodiment
FILTER frequency-selecting bandpass filters are divided into 4 sections, i.e., VHF LOW sections (45-145.9MHz), VHF HIGH section (146-
367.1MHz), UHF LOW sections (367.2-624.1MHz), UHF HIGH sections (624.2--866MHz), external 4 electricity of chip
Sense respectively constitutes each section of LC frequency-selectings bandpass filter, it can be achieved that 49.75-863.25MHz full ranges with built-in chip type variable capacitance
Rate covers.Frequency-selecting frequency range VHF LOW, VHF HIGH, UHF LOW, UHF HIGH correspond to a band limits respectively, should wrap respectively
Frequency containing Begin-band and End-band Frequency totally 8-3dB Frequency points, collectively form 4 sections of band logical frequency-selectings
Filter.Begin-band Frequency and the End-band Frequency of i.e. each section bandpass filter).
The TUNER RF frequency-selectings inductance of periphery 4 constitutes 4 LC resonance filters with the variable capacitance that chip interior integrates, this
Frequency-selecting frequency range VHF LOW, VHF HIGH, UHF LOW, UHF HIGH are set in resonance filter and software is necessary for one-to-one
Relationship, each other cannot be overlapping, in order to avoid bring channel crosstalk into.
Software is pressed completes RF FILTER detections, and feedback result with the next stage：
1, Tuner initial phases：Enter factory's detection pattern in movement debugging process, Tuner initialization is first carried out
Detection process, master chip read tuner address by iic bus, and then sending out Tuner_AUTO_CHECK control commands makes tune
Humorous device enters Auto-Sensing Mode, detection tuner status indicator position, and feeds back testing result by display interface.
2, the bandpass filter virtual condition register assignment stage：Define 8 integer functions, be respectively used to storage from
8 actual condition values read in Tuner registers, initial value are set as 0 entirely；In addition 8 floating-point type functions are defined, are respectively used to
The actual Begin-band Frequency of 4 bandpass filters of storage and End-band Frequency, initial value are set as entirely
0.0.First, Tuner staters address is entered by iic bus, reads the value in first status register address, the value pair
The Begin-band Frequency virtual conditions for answering bandpass filter VHF LOW, the value of the register then be assigned to define
Integer function 1；It next proceeds through iic bus sequence and reads other 7 bandpass filters status register numerical value, assign respectively
It is worth to other 7 integer functions.
3, bandpass filter -3dB cutoff frequencies calculation stages：According to the difference that bandpass filter is segmented, 8 kinds of calculations are defined
Method calculates separately VHF LOW, VHF HIGH, UHF LOW, UHF according to actual value in the Tuner status registers of reading
- 3dB the cutoff frequencies of HIGH bandpass filters are assigned to 8 floating-point functions of definition respectively.
4, practical bandpass filter sets the bandpass filter multilevel iudge stage with interior：According to the value of read status register with
And corresponding algorithm, the actual bandpass filter -3dB cutoff frequencies of Tuner can be accurately calculated, and end with preset standard
Frequency is compared judgement, and returns to judging result respectively, and all results are carried out logic and operation, if practical cutoff frequency
It is all marked within the scope of quasi- cutoff frequency inside, then it is assumed that RF FILTER are qualified, on the contrary then think unqualified.
5, judging result feedback, display stage：If judging result is qualified, shows RF FILTER OK, otherwise show RF
FILTER FAIL.Since the numerical value in bandpass filter and Tuner registers is one-to-one relationship, according to cutting for step 4
Only frequency judging result can show it is numerical bias in some status register, and commissioning staff can judge which is immediately
Frequency-selecting inductance deviation, facilitates maintenance personal to repair.
In conclusion the method that a kind of RF FILTER frequency-selective networks provided by the invention detect automatically, by controlling IIC
Bus reads RF FILTER frequency-selecting ranges, and judgement is compared with the frequency-selecting frequency departure range of setting, anti-by display interface
Judging result is fed out, and can determine it is that there are problems for which external inductance by the result.Television manufacturer needle can so be reduced
To the equipment and human resources input of RF FILTER detections, production cost is reduced, production efficiency is improved, improves product
Quality.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with it is other
The difference of embodiment, identical similar portion cross-reference between each embodiment.
" one embodiment " for being spoken of in the present specification, " another embodiment ", " embodiment ", etc., refer to tying
Specific features, structure or the feature for closing embodiment description are included at least one embodiment of the application generality description
In.It is not centainly to refer to the same embodiment that statement of the same race, which occur, in multiple places in the description.Appoint furthermore, it is understood that combining
When one embodiment describes a specific features, structure or feature, to be advocated be realized in conjunction with other embodiment it is this
Feature, structure or feature are also fallen within the scope of the present invention.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations will be fallen in this Shen
It please be within disclosed scope and spirit.It more specifically, within the scope of the present disclosure and claims, can be to master
The building block and/or layout for inscribing composite configuration carry out a variety of variations and modifications.In addition to what is carried out to building block and/or layout
Outside variations and modifications, to those skilled in the art, other purposes also will be apparent.
Claims (5)
1. a kind of method that silicon tuner RF FILTER are detected automatically, it is characterised in that it includes：
I) pre-set the frequency-selecting frequency departure range of RF FILTER；
II) read actual RF FILTER frequency-selecting ranges in silicon tuner tuner chip registers；
III) the actual RF FILTER frequency-selectings range of reading and the frequency-selecting frequency for pre-setting RF FILTER is inclined
Poor range is compared, for judging whether frequency-selecting range and/or silicon tuner tuner periphery frequency-selecting inductance meet design and want
It asks；
Concrete operation step：
1) silicon tuner tuner is initialized
Master chip reads the addresses silicon tuner tuner by iic bus, and then sending out tuner_AUTO_CHECK control commands makes
Silicon tuner tuner enters Auto-Sensing Mode, detection silicon tuner tuner status indicators position, and is fed back and detected by display interface
As a result；
2) bandpass filter virtual condition register assignment
8 integer functions are defined, are respectively used to store 8 actual condition values read from silicon tuner tuner registers, just
Initial value is set as 0 entirely；In addition 8 floating-point type functions are defined, 4 actual Begin-band of bandpass filter of storage are respectively used to
Frequency and End-band Frequency, initial value are set as 0.0 entirely；First, software enters silicon tuning by iic bus
Device tuner staters address, reads the value in first status register address, which corresponds to bandpass filter VHF LOW's
Then the value of the register is assigned to the integer function 1 of definition by Begin-band Frequency virtual conditions；It then proceedes to lead to
It crosses iic bus sequence and reads other 7 bandpass filters status register numerical value, be assigned to other 7 integer functions respectively；
3) bandpass filter -3dB cutoff frequencies calculate
According to the difference that bandpass filter is segmented, 8 kinds of algorithms are defined, according in the silicon tuner tuner status registers of reading
Actual value calculates separately the -3dB cutoff frequencies of VHF LOW, VHF HIGH, UHF LOW, UHF HIGH bandpass filters, respectively
It is assigned to 8 floating-point functions of definition；
4) practical bandpass filter sets bandpass filter multilevel iudge with interior
According to software algorithm and the value of read status register, the actual bandpass filters-of silicon tuner tuner are calculated
3dB cutoff frequencies, and it is compared judgement with preset standard cutoff frequency, and judging result is returned respectively, if practical cutoff frequency
Rate is all marked within the scope of quasi- cutoff frequency inside, then it is assumed that RF FILTER are qualified, on the contrary then think unqualified；
5) it will determine that result is fed back or shown.
2. the method that silicon tuner RF FILTER according to claim 1 are detected automatically, it is characterised in that default frequency-selecting model
It encloses to 49.75MHz-863.25MHz subsection setups.
3. the method that silicon tuner RF FILTER according to claim 2 are detected automatically, it is characterised in that the segmentation is set
It sets including VHF LOW, VHF HIGH, UHF LOW, UHF HIGH totally 4 sections of frequency-selecting frequency ranges, each frequency-selecting frequency range corresponds to one respectively
Band limits.
4. the method that silicon tuner RF FILTER according to claim 3 are detected automatically, it is characterised in that silicon tuner
The tuner RF frequency-selectings inductance of periphery 4 constitutes 4 LC resonance filters, the resonator, filter with the variable capacitance that chip interior integrates
Device is one-to-one relationship with default frequency-selecting frequency range VHF LOW, VHF HIGH, UHF LOW, UHF HIGH.
5. the method that silicon tuner RF FILTER according to claim 3 are detected automatically, it is characterised in that the frequency-selecting frequency
Section separately includes Begin-band Frequency and End-band Frequency totally 8 Frequency points, collectively forms 4 sections of band logicals
Frequency-selecting filter.
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| CN102377495A (en) * | 2010-08-13 | 2012-03-14 | 中兴通讯股份有限公司 | Radio frequency detection method, radio frequency detection device and radio frequency detection system |
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