CN105227182B - A kind of RF local oscillator circuit for radio general measuring instrument - Google Patents
A kind of RF local oscillator circuit for radio general measuring instrument Download PDFInfo
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- CN105227182B CN105227182B CN201510772828.3A CN201510772828A CN105227182B CN 105227182 B CN105227182 B CN 105227182B CN 201510772828 A CN201510772828 A CN 201510772828A CN 105227182 B CN105227182 B CN 105227182B
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Abstract
Disclosed by the invention is a kind of RF local oscillator circuit for radio general measuring instrument, including power supply processing module, control module, crystal oscillation fractional frequency module, point frequency synthesis module and wideband generation module；The crystal oscillation fractional frequency module is connected with the power supply processing module, control module, point frequency synthesis module, wideband generation module respectively；The power supply processing module is used to provide power supply for RF local oscillator circuit；The control module is used to control RF local oscillator circuit to produce suitable local oscillation signal；The crystal oscillation fractional frequency module is used to produce reference signal；The point frequency synthesis module is used to synthesize point-frequency signal and export；The wideband generation module is used to generate broadband signal and export.This circuit can provide a variety of internal local oscillation signals for held radio comprehensive tester, so that comprehensive tester can realize the measurement of multiple functions simultaneously.
Description
Technical field
The present invention relates to the reception of radio communication and transmission, more particularly to a kind of penetrating for radio general measuring instrument
Frequency local oscillation circuit.
Background technology
Single test is used in communicator field test instrument at present, an instrument only measures to a few functions,
The measurement of multiple functions can not be realized, therefore its RF local oscillator circuit used can only also realize a kind of output of frequency mostly.
The content of the invention
The purpose of the present invention is that the radio frequency electrical of a variety of internal local oscillation signals is provided for a kind of held radio comprehensive tester
Road, so that comprehensive tester can realize the measurement of multiple functions simultaneously.
In order to realize foregoing invention purpose, the invention provides following technical scheme：
A kind of RF local oscillator circuit for radio general measuring instrument, including power supply processing module, control module, crystal oscillator
Frequency division module, point frequency synthesis module and wideband generation module；The crystal oscillation fractional frequency module respectively with the power supply processing module, control
Molding block, point frequency synthesis module, the connection of wideband generation module；The power supply processing module is used to provide electricity for RF local oscillator circuit
Source；The control module is used to control RF local oscillator circuit to produce suitable local oscillation signal；The crystal oscillation fractional frequency module is used to produce
Raw reference signal；The point frequency synthesis module is used to synthesize point-frequency signal and export；The wideband generation module is used to give birth to
Into broadband signal and export.
Further, the crystal oscillation fractional frequency module includes DAC VTs module, the crystal oscillator and simultaneously being sequentially connected
Two clock buffer circuits connect.
Further, the crystal oscillator produces 80MHz reference signals.
Further, the point frequency synthesis module includes 1520MHz spot-frequency local oscillations output circuit and 1600MHz spot-frequency local oscillations
Output circuit.
Further, the 1520MHz spot-frequency local oscillations output circuit includes first frequency synthesis chip, the first passive ring
Filter circuit, the first voltage controlled oscillator, the first power splitter, the first low pass filter, the second low pass filter, the first amplifier；
Wherein, first frequency synthesis chip is connected with the crystal oscillation fractional frequency module and receives reference signal, and the first frequency closes
Also phase is locked into chip with the first passive ring filter circuit, the first voltage controlled oscillator, the end to end composition of the first power splitter
Loop；First power splitter is also connected group with first low pass filter, the second low pass filter, the first amplifier successively
Into output circuit.
Further, the 1600MHz spot-frequency local oscillations output circuit includes second frequency synthesis chip, the second passive ring
Filter circuit, the second voltage controlled oscillator, the second power splitter, the 3rd low pass filter, the second amplifier；Wherein, second frequency closes
It is connected into chip with the crystal oscillation fractional frequency module and receives reference signal, the second frequency synthesis chip is also with described
The end to end composition phase-locked loop of two passive ring filter circuits, the second voltage controlled oscillator, the second power splitter；Second work(point
Device is also connected composition output circuit with the 3rd low pass filter, the second amplifier successively.
Further, the wideband generation module include 1691MHz-2991MHz wideband local oscillator output circuits and
1690.7MHz-2990.7MHz wideband local oscillator output circuits.
Further, the 1691MHz-2991MHz widebands local oscillator output circuit includes the 3rd frequency synthesis chip, the 3rd
Passive ring filter circuit, the 4th low pass filter, the 3rd amplifier and the first π types attenuation network and high-pass filtering circuit；
Wherein, the 3rd frequency synthesis chip is connected with the crystal oscillation fractional frequency module and receives reference signal, the 3rd frequency
Rate synthesis chip also forms phase-locked loop circuit with the 3rd passive filter circuit；Meanwhile the 3rd frequency synthesis chip is also
Successively with the 4th low pass filter, the 3rd amplifier and the first π types attenuation network and high-pass filtering circuit
Connect and export 1691MHz-2991MHz wideband local oscillation signals.
Further, the 1690.7MHz-2990.7MHz widebands local oscillator output circuit include the 4th frequency synthesis chip,
4th passive ring filter circuit, the 5th low pass filter, the 4th amplifier and the 2nd π types attenuation network and high-pass filtering electricity
Road；Wherein, the 4th frequency synthesis chip is connected with the crystal oscillation fractional frequency module and receives reference signal, and the described 4th
Frequency synthesis chip also forms phase-locked loop circuit with the 4th passive filter circuit；Meanwhile the 4th frequency synthesis chip
It is also electric with the 5th low pass filter, the 4th amplifier and the 2nd π types attenuation network and high-pass filtering successively
Road connects and exports 1690.7MHz-2990.7MHz wideband local oscillation signals.
Compared with prior art, beneficial effects of the present invention：A variety of inside are provided for held radio comprehensive tester originally
Shake signal, so that comprehensive tester can realize the measurement of multiple functions simultaneously.
Brief description of the drawings：
Fig. 1 is RF local oscillator circuit structure block diagram provided by the invention.
Fig. 2 is crystal oscillation fractional frequency modular structure schematic diagram in the present invention.
Fig. 3 is 1520MHz spot-frequency local oscillation output circuit structure block diagrams in the present invention.
Fig. 4 is 1600MHz spot-frequency local oscillation output circuit structure block diagrams in the present invention.
Fig. 5 is 1691MHz-2991MHz widebands local oscillator output circuit of the present invention and 1690.7MHz-2990.7MHz wideband sheets
Shake output circuit structure block diagram.
Fig. 6 is DAC VT module circuit diagrams in crystal oscillation fractional frequency module in the present invention.
Fig. 7 is first, second passive ring filter circuit circuit diagram in the present invention.
Fig. 8 is the three, the 4th passive ring filter circuit circuit diagrams in the present invention.
Fig. 9 is π types attenuation network and high-pass filtering circuit circuit diagram in the present invention.
Figure 10 is crystal oscillator and clock buffer circuit circuit diagram.
Figure 11 is low-pass filter circuit circuit diagram in crystal oscillation fractional frequency module.
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.But this should not be understood
Following embodiment is only limitted to for the scope of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that present invention is realized
The scope of invention.
Embodiment 1：As shown in figure 1, the present embodiment provides a kind of RF local oscillator circuit for radio general measuring instrument,
Including power supply processing module 2, control module 3（Specifically use piece of CPLD chip XC95144XL-10TQ100C）, crystal oscillation fractional frequency
Module 1, point frequency synthesis module 4 and wideband generation module 5；The crystal oscillation fractional frequency module 1 respectively with the power supply processing module 2,
Control module 3, point frequency synthesis module 4, wideband generation module 5 connect；It is RF local oscillator circuit that the power supply processing module 2, which is used for,
Power supply is provided；The control module 3 is used to control RF local oscillator circuit to produce suitable local oscillation signal；The crystal oscillation fractional frequency module
1 is used to produce reference signal；The point frequency synthesis module 4 is used to synthesize point-frequency signal and export；The wideband generates mould
Block 5 is used to generate broadband signal and export；Wherein, as shown in Figure 10, the output port a1 of shown clock buffer circuit, output end
Mouth a2, output port a3, output port a4 are that 4 road local oscillator generation circuits export phase demodulation reference signals（4 road local oscillator generation circuits refer to
1520MHz spot-frequency local oscillations output circuit, 1600MHz spot-frequency local oscillations output circuit, 1691MHz-2991MHz widebands local oscillator output electricity
Road and 1690.7MHz-2990.7MHz wideband local oscillator output circuits）；Output port c is general measuring instrument radio-frequency module frequency mixer
Export local oscillation signal；Output port b provides reference signal for general measuring instrument signal processing module.
Further, per road, output is provided with a low-pass filter circuit as shown in figure 11 to the clock buffer circuit.
Further, as shown in Fig. 2 the crystal oscillation fractional frequency module 1 include be sequentially connected DAC VTs module 11,
Crystal oscillator 12 and and two PCI-X clock buffer circuits connecing；DAC VTs module 11 circuit diagrams such as Fig. 6 institutes
Show, wherein V is voltage output port；The crystal oscillator 12 produces 80MHz frequency references, is entered by a reverse gate circuit
The input end of clock for the two PCI-X clock buffer circuits for entering and connecing, described two PCI-X clock buffer circuits export eight tunnels
80MHz reference signals, filtered by 80MHz low pass filter, wherein four road signals are supplied to 4 local oscillator generation circuits（Refer to
1520MHz spot-frequency local oscillations output circuit 41,1600MHz spot-frequency local oscillations output circuit 42,1691MHz-2991MHz wideband local oscillators are defeated
Go out circuit 51 and 1690.7MHz-2990.7MHz wideband local oscillators output circuit 52）As phase demodulation reference signal, two-way is combined
It is sent to as local oscillation signal in the frequency mixer of rf board, is supplied to signal-processing board all the way as reference signal.
Further, the crystal oscillator 12 produces 80MHz reference signals.
Further, the point frequency synthesis module 4 includes 1520MHz spot-frequency local oscillations output circuit 41 and 1600MHz points frequency
Local oscillator output circuit 42.
Further, as shown in figure 3, the 1520MHz spot-frequency local oscillations output circuit 41 includes first frequency synthesis chip
411（Specifically use ADF4112）, the first passive ring filter circuit 412, the first voltage controlled oscillator 413, the first power splitter 414,
First low pass filter 415, the second low pass filter 416, the first amplifier 417；Wherein, first frequency synthesis chip 411 with
The crystal oscillation fractional frequency module 1 connects and receives reference signal, the first frequency synthesis chip 411 also with first nothing
The end to end composition phase-locked loop 414 of source loop filter circuit 412, the first voltage controlled oscillator 413, the first power splitter；Described
One power splitter 414 is also connected with first low pass filter 415, the second low pass filter 416, the first amplifier 417 successively
Form output circuit.
Further, as shown in figure 4, the 1600MHz spot-frequency local oscillations output circuit 42 includes second frequency synthesis chip
421st, the second passive ring filter circuit 422, the second voltage controlled oscillator 423, the second power splitter 424, the 3rd low pass filter
425th, the second amplifier 426；Wherein, second frequency synthesis chip 421 is connected with the crystal oscillation fractional frequency module 1 and receives benchmark ginseng
Examine signal, the second frequency synthesis chip 421 also with the second passive ring filter circuit 422, the second voltage controlled oscillator
423rd, 424 end to end composition phase-locked loop of the second power splitter；Second power splitter 424 also successively with the 3rd low pass filtered
Ripple device 425, the second amplifier 426 connection composition output circuit.
It should be noted that the first passive ring filter circuit 412 and the second passive ring filter circuit 422 have phase
Same circuit structure, for its structure as shown in fig. 7, its middle port a is input port, port b is output port.
Further, the wideband generation module include 1691MHz-2991MHz wideband local oscillators output circuit 51 and
1690.7MHz-2990.7MHz wideband local oscillator output circuit 52.
Further, the 1691MHz-2991MHz widebands local oscillator output circuit 51 and 1690.7MHz-2990.7MHz are wide
Frequency local oscillator output circuit 52 has identical circuit structure, and its structure is as shown in figure 5, including the 3rd frequency synthesis chip 501（Tool
Body uses HMC830）, passive ring filter circuit 502, low pass filter 503, amplifier 504 and π types attenuation network and height
Bandpass filter circuit 505；Wherein, the frequency synthesis chip 501 is connected with the crystal oscillation fractional frequency module 1 and receives reference letter
Number, the frequency synthesis chip 501 also forms phase-locked loop circuit with the passive filter circuit 502；Meanwhile the frequency synthesis
Chip 501 is also electric with the low pass filter 503, the amplifier 504 and the π types attenuation network and high-pass filtering successively
Road 505 connects and exports 1691MHz-2991MHz or 1690.7MHz-2990.7MHz wideband local oscillation signals, wherein passive ring
For the particular circuit configurations of filter circuit 502 as shown in figure 8, port a is input, port b is output end；π types attenuation network and
Shown in circuit structure diagram Fig. 9 of high-pass filtering circuit 505, its middle port a is input, and port b is output end.
Claims (3)
1. a kind of RF local oscillator circuit for radio general measuring instrument, it is characterised in that including power supply processing module, control
Module, crystal oscillation fractional frequency module, point frequency synthesis module and wideband generation module；The crystal oscillation fractional frequency module respectively with the power supply
Manage module, control module, point frequency synthesis module, the connection of wideband generation module；It is RF local oscillator that the power supply processing module, which is used for,
Circuit provides power supply；The control module is used to control RF local oscillator circuit to produce suitable local oscillation signal；The crystal oscillation fractional frequency
Module is used to produce reference signal；The point frequency synthesis module is used to synthesize point-frequency signal and export；The wideband generation
Module is used to generate broadband signal and export；
The point frequency synthesis module includes 1520MHz spot-frequency local oscillations output circuit and 1600MHz spot-frequency local oscillation output circuits；Its
In, the 1520MHz spot-frequency local oscillations output circuit includes first frequency synthesis chip, the first passive ring filter circuit, first
Voltage controlled oscillator, the first power splitter, the first low pass filter, the second low pass filter, the first amplifier；Wherein, first frequency
Synthesis chip is connected with the crystal oscillation fractional frequency module and receives reference signal, the first frequency synthesis chip also with it is described
The end to end composition phase-locked loop of first passive ring filter circuit, the first voltage controlled oscillator, the first power splitter；First work(
Device is divided also to be connected composition output circuit with first low pass filter, the second low pass filter, the first amplifier successively；It is described
1600MHz spot-frequency local oscillations output circuit includes second frequency synthesis chip, the second passive ring filter circuit, the second VCO
Device, the second power splitter, the 3rd low pass filter, the second amplifier；Wherein, second frequency synthesis chip and the crystal oscillation fractional frequency mould
Block connects and receives reference signal, the second frequency synthesis chip also with the second passive ring filter circuit,
The end to end composition phase-locked loop of two voltage controlled oscillators, the second power splitter；Second power splitter is also low with the described 3rd successively
Bandpass filter, the second amplifier connection composition output circuit；
The wideband generation module includes 1691MHz-2991MHz wideband local oscillator output circuits and 1690.7MHz-2990.7MHz
Wideband local oscillator output circuit；Wherein, the 1691MHz-2991MHz widebands local oscillator output circuit includes the 3rd frequency synthesis core
Piece, the 3rd passive ring filter circuit, the 4th low pass filter, the 3rd amplifier and the first π types attenuation network and high pass filter
Wave circuit；Wherein, the 3rd frequency synthesis chip is connected with the crystal oscillation fractional frequency module and receives reference signal, described
3rd frequency synthesis chip also forms phase-locked loop circuit with the 3rd passive ring filter circuit；Meanwhile the 3rd frequency
Synthesis chip also successively with the 4th low pass filter, the 3rd amplifier and the first π types attenuation network and height
Bandpass filter circuit connects and exports 1691MHz-2991MHz wideband local oscillation signals；The 1690.7MHz-2990.7MHz widebands sheet
The output circuit that shakes includes the 4th frequency synthesis chip, the 4th passive ring filter circuit, the 5th low pass filter, the 4th amplifier
And the 2nd π types attenuation network and high-pass filtering circuit；Wherein, the 4th frequency synthesis chip and the crystal oscillation fractional frequency module
Connect and receive reference signal, the 4th frequency synthesis chip is also formed with the 4th passive ring filter circuit to be locked
Phase loop circuit；Meanwhile the 4th frequency synthesis chip also successively with the 5th low pass filter, the 4th amplifier with
And the 2nd π type attenuation networks connect with high-pass filtering circuit and export 1690.7MHz-2990.7MHz wideband local oscillation signals.
2. it is used for the RF local oscillator circuit of radio general measuring instrument as claimed in claim 1, it is characterised in that the crystal oscillator
Frequency division module includes DAC VTs module, crystal oscillator and and two clock buffer circuits connecing being sequentially connected.
3. it is used for the RF local oscillator circuit of radio general measuring instrument as claimed in claim 2, it is characterised in that the crystal
Oscillator produces 80MHz reference signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772828.3A CN105227182B (en) | 2015-11-13 | 2015-11-13 | A kind of RF local oscillator circuit for radio general measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772828.3A CN105227182B (en) | 2015-11-13 | 2015-11-13 | A kind of RF local oscillator circuit for radio general measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105227182A CN105227182A (en) | 2016-01-06 |
| CN105227182B true CN105227182B (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510772828.3A Active CN105227182B (en) | 2015-11-13 | 2015-11-13 | A kind of RF local oscillator circuit for radio general measuring instrument |
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Citations (5)
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|---|---|---|---|---|
| US5479136A (en) * | 1994-05-16 | 1995-12-26 | Fujitsu Limited | AFC circuit having local oscillator phase locked loop |
| CN201623700U (en) * | 2009-12-30 | 2010-11-03 | 上海迦美信芯通讯技术有限公司 | Adjustable frequency synthesizer |
| CN202019345U (en) * | 2010-11-27 | 2011-10-26 | 泉州市微通信息科技有限公司 | WCDMA (Wideband Code Division Multiple Access) three carrier frequency range selector |
| CN203014777U (en) * | 2012-12-28 | 2013-06-19 | 四川九洲电器集团有限责任公司 | Simplified frequency agility frequency synthesizer based on DDS non-linear characteristics |
| CN205105194U (en) * | 2015-11-13 | 2016-03-23 | 成都前锋电子仪器有限责任公司 | A radio frequency local oscillator circuit for radio general measuring instrument |
-
2015
- 2015-11-13 CN CN201510772828.3A patent/CN105227182B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5479136A (en) * | 1994-05-16 | 1995-12-26 | Fujitsu Limited | AFC circuit having local oscillator phase locked loop |
| CN201623700U (en) * | 2009-12-30 | 2010-11-03 | 上海迦美信芯通讯技术有限公司 | Adjustable frequency synthesizer |
| CN202019345U (en) * | 2010-11-27 | 2011-10-26 | 泉州市微通信息科技有限公司 | WCDMA (Wideband Code Division Multiple Access) three carrier frequency range selector |
| CN203014777U (en) * | 2012-12-28 | 2013-06-19 | 四川九洲电器集团有限责任公司 | Simplified frequency agility frequency synthesizer based on DDS non-linear characteristics |
| CN205105194U (en) * | 2015-11-13 | 2016-03-23 | 成都前锋电子仪器有限责任公司 | A radio frequency local oscillator circuit for radio general measuring instrument |
Non-Patent Citations (2)
| Title |
|---|
| "0～3.6GHz频谱仪射频前端关键技术研究";黄跃成;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20130731;摘要，正文第3.1.3、3.1.5小节 * |
| "MIMO通信系统2.4-5GHz宽频段接收机设计与实现";王勇;《中国优秀硕士学位论文全文数据库》;20130630;摘要，正文第三章、第四章 * |
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