CN203722752U - KU-waveband dual-polarized single output high frequency tuner - Google Patents
KU-waveband dual-polarized single output high frequency tuner Download PDFInfo
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- CN203722752U CN203722752U CN201420042323.2U CN201420042323U CN203722752U CN 203722752 U CN203722752 U CN 203722752U CN 201420042323 U CN201420042323 U CN 201420042323U CN 203722752 U CN203722752 U CN 203722752U
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- 239000013078 crystal Substances 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 230000009977 dual effect Effects 0.000 claims description 18
- 230000005669 field effect Effects 0.000 claims description 15
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a KU-waveband dual-polarized single output high frequency tuner, which comprises a feed source, a circuit board box provided with a built-in circuit board, a connector arranged on the circuit board box, and a waveguide which is used for transmitting signals and connected between the feed source and the circuit board box, wherein the circuit board is provided with a control circuit, a high-frequency amplifying circuit, a voltage-stabilizing power supply circuit and a filtering circuit, the voltage-stabilizing power supply circuit is connected with the high-frequency amplifying circuit for power supply, signals output by the high-frequency amplifying circuit pass the filtering circuit and then enter the control circuit, and the control circuit is further connected with a crystal oscillator phase locked circuit. The KU-waveband dual-polarized single output high frequency tuner adopts the integrated chip TFF1014 to achieve the integration of mixing and intermediate frequency amplifying circuits, and automatically realizes the phase locking, mixing and intermediate frequency output amplification functions through a 25MHZ crystal, thereby solving the defects of performance indexes such as low gain and high noise factor caused by the loss since the KU-waveband dual-polarized single output high frequency tuner does not need manual frequency modulation and utilizes a separation circuit for frequency mixing.
Description
Technical field
The utility model relates to a kind of satellite signal receiving apparatus, relates in particular to a kind of for receiving the KU band dual of digital satellite television signal single output high frequency tuner that polarizes.
Background technology
KU wave band tuner is for receiving digital television high-frequency signal, the one, the signal of selection institute receiving channels, suppress the interference of other channel and noise signal, the 2nd, the high-frequency signal of receiving channels is amplified, improve receiving sensitivity, the 3rd, by reception signal and oscillation signals according mixing, then export fixing intermediate-freuqncy signal and send receiver decoding to.In this process, have a link very important, the output signal that is exactly Ku wave band tuner will be synchronizeed with reference-input signal and be consistent in frequency and phase place, by this link, just can obtain stable audio signal and vision signal.
At present, in prior art the solution of above-mentioned link normally by the control chip of circuit board and and the triode frequency of oscillation circuit that forms with DR jointly complete, it specifically in use, need first by regulating tuning screw on Ku wave band tuner to adjust the spacing between DR and screw in frequency of oscillation circuit, thereby change the local frequency that frequency of oscillation circuit produces, then by control chip, control frequency and the phase place that this local frequency is removed regulation output signal, until output signal is synchronizeed with reference-input signal and is consistent in frequency and phase place, thereby reach, output signal is entered to line-locked object.Because satellite low noise block is outdoor application product, work under bad environment, the variation that is easily subject to ambient temperature is expanded with heat and contract with cold the assembly of tuner to cause the spacing between tuning screw and DR to change and is changed the local frequency that frequency of oscillation circuit produces, and finally affects the paid quality of tuner.
In addition, polarize single output high frequency tuner mixting circuit and intermediate frequency amplifier circuit of existing KU band dual partly adopts independent split circuit, and in conversion process, loss ratio is larger, and low, the performance index such as flatness is poor, noise factor height easily cause gaining.
In view of this, the inventor studies this, develops specially a kind of KU band dual single output high frequency tuner that polarizes, and this case produces thus.
Utility model content
The purpose of this utility model is to provide a kind of KU band dual single output high frequency tuner that polarizes, adopt integrated chip TFF1014 make mixing and intermediate frequency amplifier circuit integrated, by the crystal with a 25MHZ, automatically complete phase-locked, mixing and intermediate frequency output amplification, thereby solved the KU band dual manually frequency modulation of single output high frequency tuner that polarizes, and by the loss that split circuit mixing the causes defects low, the performance index such as noise factor is high that cause gaining.
To achieve these goals, solution of the present utility model is:
KU band dual single output high frequency tuner that polarizes, comprise feed, internal circuit board circuit board box, be arranged on the joint on circuit board box, and be connected between described feed and described circuit board box, for the waveguide pipe of transmission of signal; Described circuit board is provided with control circuit, high-frequency amplifier circuit, voltage-stabilized power supply circuit and filter circuit, wherein, voltage-stabilized power supply circuit is connected with high-frequency amplifier circuit, for its power supply, the signal of high-frequency amplifier circuit output is after filtering after circuit, enter control circuit, control circuit is further connected with crystal oscillator phase lock circuitry; Above-mentioned control circuit adopts TFF1014 control chip.
As preferably, above-mentioned voltage-stabilized power supply circuit adopts the power supply chip that model is MC4202.
As preferably, above-mentioned high-frequency amplifier circuit comprises interconnective the first field effect transistor amplifier tube, the second field effect transistor amplifier tube and the 3rd field effect transistor amplifier tube, voltage-stabilized power supply circuit is connected with above-mentioned 3 field effect transistor amplifier tubes respectively by resistance, for high-frequency amplifier circuit provides operating voltage, guarantee that amplifying circuit normally works.
As preferably, above-mentioned crystal oscillator phase lock circuitry adopts 25MHZ crystal oscillator.
Above-mentioned KU band dual single output high frequency tuner operation principle that polarizes: described feed transfers to high-frequency amplifier circuit by waveguide pipe after receiving ground satellite-signal, described high-frequency amplifier circuit amplifies signal to process, and obtain 10.7-12.75GHz signal through filter circuit filtering clutter, above-mentioned 10.7-12.75GHz signal is transferred to TFF1014 control chip, described control chip is processed the signal receiving, generating output signal, then the frequency between more above-mentioned output signal and reference-input signal and phase place difference, and the local frequency matching by the generation of control crystal oscillator phase lock circuitry is adjusted described output signal, until after the frequency of described output signal and phase place synchronize with reference-input signal and be consistent, again described output signal is exported to joint by control chip circuit, transfer in TV for playing.
Compared with prior art, above-mentioned KU band dual single output high frequency tuner tool that polarizes has the following advantages:
1. the local frequency of producing by TFF1014 control chip and 25MHZ crystal oscillator, automatically to complete the adjusting of its output signal frequency and phase place and locking work, without manual frequency modulation, thereby effectively reduces operation easier, has saved a large amount of manpower and materials;
2. it is very little that described in, crystal oscillator phase lock circuitry is subject to the impact of temperature in general environment, and good stability can effectively guarantee the quality of output signal;
3. the performance index such as the high TFF1014 chip of employing integrated level carries out mixing and intermediate frequency amplification, low in energy consumption, loss is little, has guaranteed that product gains high, and noise factor is low.
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the KU band dual of the present embodiment single output high frequency tuner structural representation that polarizes;
Fig. 2 is the KU band dual of the present embodiment single output high frequency tuner main circuit schematic diagram (except voltage-stabilized power supply circuit) that polarizes.
Fig. 3 is the KU band dual of the present embodiment single output high frequency tuner voltage-stabilized power supply circuit schematic diagram that polarizes.
Embodiment
As shown in Figure 1, a kind of KU band dual single output high frequency tuner that polarizes, comprise feed 1, internal circuit board circuit board box 3, be arranged on the joint 4 on circuit board box 3, and be connected between described feed 1 and described circuit board box 3, for the waveguide pipe 2 of transmission of signal; Described circuit board is provided with control circuit 6, high-frequency amplifier circuit 7, voltage-stabilized power supply circuit 9, filter circuit 8 and crystal oscillator phase lock circuitry 10.
In the present embodiment, above-mentioned voltage-stabilized power supply circuit 9 adopts the power supply chip that model is MC4202, and described control circuit 6 adopts TFF1014 control chip.The pin D1 G1 D2 G2 D3 G3 of power supply chip is connected with the first field effect transistor amplifier tube Q1, the second field effect transistor amplifier tube Q2, the 3rd field effect transistor amplifier tube Q3 by resistance R 1 R2 R3 R4 R5 R6 respectively, for Q1 Q2 Q3 provides an operating voltage, the output of above-mentioned the first field effect transistor amplifier tube Q1, the second field effect transistor amplifier tube Q2 is connected with the 3rd field effect transistor amplifier tube Q3 input by capacitor C 5 C6.The output of the 3rd described field effect transistor amplifier tube Q3 is connected with filter circuit 8, filtered 10.7-12.75GHz the signal of filter circuit 8 is connected to TFF1014 control chip, the VCC pin of TFF1014 control chip is connected with the VOUT pin of voltage-stabilized power supply circuit 9, LF pin, VREG pin is connected with capacitor C 13 C14 C15 R7, the external matching circuit of formation control chip circuit 6, described crystal oscillator phase lock circuitry 10 adopts 25MHZ crystal oscillator Z1, crystal oscillator Z1 directly and the XO1 pin of control circuit 6, XO2 pin is connected, crystal oscillator Z1 has mated the phase-locked object of paired frequency and phase place with control circuit 6.The local frequency of producing by TFF1014 control chip and 25MHZ crystal oscillator, automatically to complete the adjusting of its output signal frequency and phase place and locking work, without manual frequency modulation, thereby effectively reduces operation easier, has saved a large amount of manpower and materials.
Above-mentioned KU band dual single output high frequency tuner operation principle that polarizes: described feed 1 transfers to high-frequency amplifier circuit 7 by waveguide pipe 2 after receiving ground satellite-signal, described high-frequency amplifier circuit 7 amplifies signal to process, and obtain 10.7-12.75GHz signal through filter circuit filtering clutter, above-mentioned 10.7-12.75GHz signal is transferred to TFF1014 control chip, described control chip is processed the signal receiving, generating output signal, then the frequency between more above-mentioned output signal and reference-input signal and phase place difference, and the local frequency matching by 10 generations of control crystal oscillator phase lock circuitry is adjusted described output signal, until after the frequency of described output signal and phase place synchronize with reference-input signal and be consistent, again described output signal is exported to joint 4 by control chip circuit, transfer in TV for playing.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, suitable variation or modification that any person of an ordinary skill in the technical field does it, all should be considered as not departing from patent category of the present utility model.
Claims (4)
1. KU band dual single output high frequency tuner that polarizes, is characterized in that: comprise feed, internal circuit board circuit board box, be arranged on the joint on circuit board box, and be connected between described feed and described circuit board box, for the waveguide pipe of transmission of signal; Described circuit board is provided with control circuit, high-frequency amplifier circuit, voltage-stabilized power supply circuit and filter circuit, wherein, voltage-stabilized power supply circuit is connected with high-frequency amplifier circuit, for its power supply, the signal of high-frequency amplifier circuit output is after filtering after circuit, enter control circuit, control circuit is further connected with crystal oscillator phase lock circuitry; Above-mentioned control circuit adopts TFF1014 control chip.
2. a kind of KU band dual as claimed in claim 1 single output high frequency tuner that polarizes, is characterized in that: above-mentioned voltage-stabilized power supply circuit adopts the power supply chip that model is MC4202.
3. a kind of KU band dual as claimed in claim 1 single output high frequency tuner that polarizes, it is characterized in that: above-mentioned high-frequency amplifier circuit comprises interconnective the first field effect transistor amplifier tube, the second field effect transistor amplifier tube and the 3rd field effect transistor amplifier tube, voltage-stabilized power supply circuit is connected with above-mentioned 3 field effect transistor amplifier tubes respectively by resistance.
4. a kind of KU band dual as claimed in claim 1 single output high frequency tuner that polarizes, is characterized in that: above-mentioned crystal oscillator phase lock circuitry adopts 25MHZ crystal oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420042323.2U CN203722752U (en) | 2014-01-23 | 2014-01-23 | KU-waveband dual-polarized single output high frequency tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420042323.2U CN203722752U (en) | 2014-01-23 | 2014-01-23 | KU-waveband dual-polarized single output high frequency tuner |
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| Publication Number | Publication Date |
|---|---|
| CN203722752U true CN203722752U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420042323.2U Expired - Lifetime CN203722752U (en) | 2014-01-23 | 2014-01-23 | KU-waveband dual-polarized single output high frequency tuner |
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| CN (1) | CN203722752U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104469215A (en) * | 2015-01-04 | 2015-03-25 | 安徽波维电子科技有限公司 | C-waveband tuner sharing two-level amplifier |
-
2014
- 2014-01-23 CN CN201420042323.2U patent/CN203722752U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104469215A (en) * | 2015-01-04 | 2015-03-25 | 安徽波维电子科技有限公司 | C-waveband tuner sharing two-level amplifier |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |