CN105262485B - A kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit - Google Patents
A kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit Download PDFInfo
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- CN105262485B CN105262485B CN201510772705.XA CN201510772705A CN105262485B CN 105262485 B CN105262485 B CN 105262485B CN 201510772705 A CN201510772705 A CN 201510772705A CN 105262485 B CN105262485 B CN 105262485B
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- pass filtering
- frequency synthesis
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Abstract
Disclosed by the invention is a kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit, including frequency synthesis chip, passive ring filter circuit, low-pass filter, amplifier and π types attenuation network and high-pass filtering circuit；Wherein, the frequency synthesis chip is connected with crystal oscillation fractional frequency module and receives reference signal, and the frequency synthesis chip also forms phase-locked loop circuit with the passive filter circuit；Meanwhile the frequency synthesis chip is also connected with the low-pass filter, the amplifier and the π types attenuation network and high-pass filtering circuit and exports wideband local oscillation signal successively.Wideband generative circuit provided by the invention is simple in structure, stable；Due to its simple structure, it can make to be integrated with more wideband generative circuits in held radio comprehensive tester, so that a variety of internal local oscillation signals are generated, so that comprehensive tester can realize the measurement of multiple functions at the same time.
Description
Technical field
It is more particularly to a kind of to be used for radio general measuring instrument radio frequency the present invention relates to the reception and transmission of radio communication
The wideband generative circuit of local oscillation circuit.
Background technology
Wideband generative circuit be for the important component in radio communication device field test instrument, it is but existing
The problem of wideband generative circuit is mostly complicated there are circuit, fluctuation of service.
The content of the invention
The purpose of the present invention is provide a kind of width simple in structure, stable for a kind of held radio comprehensive tester
Frequency generative circuit.
In order to realize foregoing invention purpose, the present invention provides following technical scheme：
A kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit, including frequency synthesis chip,
Passive ring filter circuit, low-pass filter, amplifier and π types attenuation network and high-pass filtering circuit；Wherein, the frequency
Synthesis chip is connected with crystal oscillation fractional frequency module and receives reference signal, the frequency synthesis chip also with the passive filtering
Circuit forms phase-locked loop circuit；Meanwhile the frequency synthesis chip also successively with the low-pass filter, the amplifier and
The π types attenuation network connects with high-pass filtering circuit and exports wideband local oscillation signal.
Further, the passive ring filter circuit includes first resistor, second resistance, one end of the first resistor
For the input terminal of the passive ring filter circuit, the input terminal also one end with the first capacitance, the one of 3rd resistor at the same time
End connection；The other end ground connection of first capacitance；The other end of the 3rd resistor passes through the second capacity earth；Described first
The other end of resistance is connected with one end of the second resistance, and the other end of the second resistance is the passive ring filtered electrical
The output terminal on road, the one end of the output terminal also with the 3rd capacitance are connected, the other end ground connection of the 3rd capacitance；Described first
The 4th capacitance of one end ground connection is additionally provided between resistance and second resistance.
Further, the π types attenuation network and high-pass filtering circuit include the 5th capacitance, the 6th capacitance being sequentially connected in series
And the 7th capacitance, wherein the free end of the 5th capacitance is the π types attenuation network and the input terminal of high-pass filtering circuit, institute
The free end for stating the 7th capacitance is the π types attenuation network and the output terminal of high-pass filtering circuit；5th capacitance and the 6th
The first inductance of one end ground connection is provided between capacitance；The of one end ground connection is provided between 6th capacitance and the 7th capacitance
Two inductance.
Wideband generative circuit provided by the invention is used in a radio general measuring instrument RF local oscillator circuit, the radio frequency
Local oscillation circuit includes power supply processing module, control module, point frequency generation module, crystal oscillation fractional frequency module and width provided by the invention
Frequency generative circuit；The crystal oscillation fractional frequency circuit respectively with the power supply processing module, control module, wideband generative circuit, point frequency
Generation module connects；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 produces suitable local oscillation signal；The crystal oscillation fractional frequency circuit is used to produce reference signal；The wideband
Generative circuit is used to synthesize point-frequency signal and export；The point frequency generation module is used to generate broadband signal and export.
Compared with prior art, beneficial effects of the present invention：Wideband generative circuit provided by the invention is simple in structure, operation
Stablize；Due to its simple structure, can make to be integrated with more wideband generative circuits in held radio comprehensive tester, from
And a variety of internal local oscillation signals are generated, so that comprehensive tester can realize the measurement of multiple functions at the same time.
Brief description of the drawings：
Fig. 1 is wideband generative circuit structure diagram provided by the invention.
Fig. 2 is frequency synthesis chip and its peripheral circuit circuit diagram in wideband generative circuit.
Fig. 3 is passive ring filter circuit circuit diagram.
Fig. 4 is low-pass filter and amplifier circuit figure.
Fig. 5 is π types attenuation network and high-pass filtering circuit circuit diagram.
Fig. 6 is RF local oscillator circuit structure block diagram.
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 Fig. 1 to 5, the present embodiment provides one kind to be used for radio general measuring instrument RF local oscillator circuit
(1691~2991) MHz or (1690.7~2990.7) MHz wideband generative circuits, including frequency synthesis chip 1（It is specific to use
HMC830 chips, D1 in Fig. 2）, passive ring filter circuit 2, low-pass filter 3, amplifier 4 and π types attenuation network and height
Bandpass filter circuit 5；Wherein, the frequency synthesis chip 1 is connected with crystal oscillation fractional frequency module and receives 80MHz reference signals,
The frequency synthesis chip 1 also forms phase-locked loop circuit with the passive filter circuit 2；Meanwhile the frequency synthesis chip 1 is also
It is connected and exports with the low-pass filter 3, the amplifier 4 and the π types attenuation network and high-pass filtering circuit 5 successively
(1691~2991) MHz or (1690.7~2990.7) MHz wideband local oscillation signals.
Further, the passive ring filter circuit 2 includes first resistor R72, second resistance R74, first electricity
Hinder R70 one end b1 be the passive ring filter circuit 2 input terminal, the input terminal b1 also at the same time with the first capacitance C101
One end, 3rd resistor R72 one end connection；The other end ground connection of the first capacitance C101；The 3rd resistor R72's is another
One end is grounded by the second capacitance C102；The other end of the first resistor R70 is connected with one end of the second resistance R74,
The other end c1 of the second resistance R74 is the output terminal of the passive ring filter circuit 2, and the output terminal c2 is also with the 3rd
One end connection of capacitance C11, the other end ground connection of the 3rd capacitance C11；The first resistor R70 and second resistance R74's
Between be additionally provided with one end ground connection the 4th capacitance C39.
Further, as shown in figure 5, the π types attenuation network and high-pass filtering circuit 5 include the 5th electricity being sequentially connected in series
Hold C172, the 6th capacitance C170 and the 7th capacitance C168, wherein the free end d1 of the 5th capacitance C172 decays for the π types
The input terminal of network and high-pass filtering circuit 5, the free end of the 7th capacitance c168 are filtered for the π types attenuation network and high pass
The output terminal of wave circuit 5；The first inductance of one end ground connection is provided between the 5th capacitance C172 and the 6th capacitance C170
L19；The second inductance L18 of one end ground connection is provided between the 6th capacitance C170 and the 7th capacitance C168.
B1 ports connect in a1 ports, the output circuit that b1 ports are the frequency synthesis chip 1 in Fig. 2, wherein b1 and Fig. 3
Connect, the c1 ports in Fig. 3 are connected with the c1 ports in Fig. 2；A1 ports in Fig. 2 are connected with the a1 ports in Fig. 4；In Fig. 4
D1 ports are connected with the d1 ports in Fig. 5.
Wideband generative circuit provided by the invention is used in a radio general measuring instrument RF local oscillator circuit as shown in Figure 6
In, the RF local oscillator circuit includes power supply processing module, control module, point frequency generation module, crystal oscillation fractional frequency module and sheet
The wideband generative circuit provided is provided；The crystal oscillation fractional frequency circuit is given birth to the power supply processing module, control module, wideband respectively
Into circuit, the generation module connection of point frequency；The power supply processing module is used to provide power supply for RF local oscillator circuit；The control mould
Block is used to control RF local oscillator circuit to produce suitable local oscillation signal；The crystal oscillation fractional frequency circuit is used to produce reference letter
Number；The wideband generative circuit is used to synthesize point-frequency signal and export；The point frequency generation module is used to generate broadband signal simultaneously
Output.
Claims (1)
1. a kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit, it is characterised in that including frequency
Synthesis chip, passive ring filter circuit, low-pass filter, amplifier and π types attenuation network and high-pass filtering circuit；Its
In, the frequency synthesis chip is connected with crystal oscillation fractional frequency module and receives reference signal, the frequency synthesis chip also with
The passive ring filter circuit forms phase-locked loop circuit；Meanwhile the frequency synthesis chip also successively with the low-pass filtering
Device, the amplifier and the π types attenuation network connected with high-pass filtering circuit and export 1691~2991MHz or
The wideband local oscillation signal of 1690.7~2990.7MHz；
The passive ring filter circuit includes first resistor, second resistance, and one end of the first resistor is the passive loops
The input terminal of road filter circuit, the input terminal are also connected with one end of the first capacitance, one end of 3rd resistor at the same time；Described
The other end ground connection of one capacitance；The other end of the 3rd resistor passes through the second capacity earth；The other end of the first resistor
It is connected with one end of the second resistance, the other end of the second resistance is the output terminal of the passive ring filter circuit,
The one end of the output terminal also with the 3rd capacitance is connected, the other end ground connection of the 3rd capacitance；The first resistor and second
The 4th capacitance of one end ground connection is additionally provided between resistance；
The π types attenuation network and high-pass filtering circuit include the 5th capacitance, the 6th capacitance and the 7th capacitance being sequentially connected in series, its
Described in the 5th capacitance free end for the π types attenuation network and high-pass filtering circuit input terminal, the 7th capacitance
Free end is the π types attenuation network and the output terminal of high-pass filtering circuit；Set between 5th capacitance and the 6th capacitance
There is the first inductance that one end is grounded；The second inductance of one end ground connection is provided between 6th capacitance and the 7th capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772705.XA CN105262485B (en) | 2015-11-13 | 2015-11-13 | A kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772705.XA CN105262485B (en) | 2015-11-13 | 2015-11-13 | A kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit |
Publications (2)
| Publication Number | Publication Date |
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| CN105262485A CN105262485A (en) | 2016-01-20 |
| CN105262485B true CN105262485B (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510772705.XA Active CN105262485B (en) | 2015-11-13 | 2015-11-13 | A kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106533142B (en) * | 2016-10-18 | 2023-05-26 | 成都前锋电子仪器有限责任公司 | Anti-backflow circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201639571U (en) * | 2010-02-09 | 2010-11-17 | 青岛海信移动通信技术股份有限公司 | Mobile communication terminal with mobile television function |
| CN102055473A (en) * | 2010-12-23 | 2011-05-11 | 中国科学院武汉物理与数学研究所 | CPT (coherent population trapping) atomic frequency standard based frequency synthesis system |
| CN104898027A (en) * | 2015-06-17 | 2015-09-09 | 成都前锋电子仪器有限责任公司 | Multifunctional communication signal measurement radio frequency front-end circuit |
| CN205105195U (en) * | 2015-11-13 | 2016-03-23 | 成都前锋电子仪器有限责任公司 | A wide band generating circuit that is used for radio general measuring instrument radio frequency local oscillator circuit |
-
2015
- 2015-11-13 CN CN201510772705.XA patent/CN105262485B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201639571U (en) * | 2010-02-09 | 2010-11-17 | 青岛海信移动通信技术股份有限公司 | Mobile communication terminal with mobile television function |
| CN102055473A (en) * | 2010-12-23 | 2011-05-11 | 中国科学院武汉物理与数学研究所 | CPT (coherent population trapping) atomic frequency standard based frequency synthesis system |
| CN104898027A (en) * | 2015-06-17 | 2015-09-09 | 成都前锋电子仪器有限责任公司 | Multifunctional communication signal measurement radio frequency front-end circuit |
| CN205105195U (en) * | 2015-11-13 | 2016-03-23 | 成都前锋电子仪器有限责任公司 | A wide band generating circuit that is used for radio general measuring instrument radio frequency local oscillator circuit |
Non-Patent Citations (1)
| Title |
|---|
| "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》;20130615;摘要，正文第三章、第四章 * |
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| CN105262485A (en) | 2016-01-20 |
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