CN105245226A - Dot frequency generation circuit for radio-frequency local oscillation circuit of radio integrated measurement instrument - Google Patents
Dot frequency generation circuit for radio-frequency local oscillation circuit of radio integrated measurement instrument Download PDFInfo
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- CN105245226A CN105245226A CN201510772495.4A CN201510772495A CN105245226A CN 105245226 A CN105245226 A CN 105245226A CN 201510772495 A CN201510772495 A CN 201510772495A CN 105245226 A CN105245226 A CN 105245226A
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Abstract
The invention discloses a dot frequency generation circuit for a radio-frequency local oscillation circuit of a radio integrated measurement instrument. The dot frequency generation circuit comprises a frequency synthesis chip, a passive loop filter circuit, a voltage-controlled oscillator, a power divider, a first low-pass filter and an amplifier; the frequency synthesis chip is connected with a crystal vibration frequency division module and receives a reference signal, and the frequency synthesis chip, the passive loop filter circuit, the voltage-controlled oscillator and the power divider are also connected end to end to form a phase-locked loop; and the power divider is also successively connected with the low-pass filter and the amplifier to form an output circuit. The dot frequency generation circuit provided by the invention is simple in structure and runs stably; and, because the structure of the dot frequency generation circuit is simple, a lot of dot frequency generation circuits can be integrated in a handheld radio integrated measurement instrument, multiple kinds of internal local oscillation signals are generated, and then the integrated measurement instrument can achieve measurement of multiple functions at the same time.
Description
Technical field
The present invention relates to reception and the transmission of radio communication, particularly a kind of point for radio general measuring instrument radio-frequency (RF) local oscillator circuit generative circuit frequently.
Background technology
Point frequently generative circuit is for the important component part in radio communication device field test instrument, but existing generative circuit frequently exists circuit complexity, the problem of fluctuation of service mostly.
Summary of the invention
The object of the invention is for a kind of held radio comprehensive tester provides a kind of structure simple, stable point is generative circuit frequently.
In order to realize foregoing invention object, the invention provides following technical scheme:
For a some generative circuit frequently for radio general measuring instrument radio-frequency (RF) local oscillator circuit, comprise frequency synthesis chip, passive ring filter circuit, voltage controlled oscillator, power splitter, the first low pass filter and amplifier; Wherein, frequency synthesis chip and crystal oscillation fractional frequency model calling also receive reference signal, described frequency synthesis chip also with described passive ring filter circuit, voltage controlled oscillator, the end to end composition phase-locked loop of power splitter; Described power splitter also connects to form output circuit with described low pass filter, described amplifier successively.
Further, described generative circuit frequently also comprises the second low pass filter be arranged between the first low pass filter and described amplifier.
Further, described passive ring filter circuit comprises the first resistance, and one end of described first resistance is the input of described passive ring filter circuit, and described input is also connected with one end of the first electric capacity, one end of the second resistance simultaneously; The other end ground connection of described first electric capacity; The other end of described second resistance is by the second capacity earth; The other end of described first resistance is the output of described passive ring filter circuit, and described output is also connected with one end of the 3rd electric capacity, the other end ground connection of described 3rd electric capacity.
Frequently generative circuit provided by the invention is used in a radio general measuring instrument radio-frequency (RF) local oscillator circuit, and described radio-frequency (RF) local oscillator circuit comprises power supply processing module, control module, wideband generation module, crystal oscillation fractional frequency module and point provided by the invention generative circuit frequently; Frequently generative circuit, wideband generation module are connected described crystal oscillation fractional frequency circuit with described power supply processing module, control module, point respectively; Described power supply processing module is used for providing power supply for radio-frequency (RF) local oscillator circuit; Described control module produces suitable local oscillation signal for controlling radio-frequency (RF) local oscillator circuit; Described crystal oscillation fractional frequency circuit is for generation of reference signal; Described frequently generative circuit is for the synthesis of point-frequency signal and export; Described wideband generation module is for generating broadband signal and exporting.
Compared with prior art, beneficial effect of the present invention: point provided by the invention frequently generative circuit structure is simple, stable; Due to its simple structure, can make in held radio comprehensive tester, to be integrated with more some generative circuit frequently, thus generate multiple inner local oscillation signal, and then make comprehensive tester can realize the measurement of several functions simultaneously.
Accompanying drawing illustrates:
Fig. 1 is the structured flowchart of generative circuit embodiment 1 frequently provided by the invention.
Fig. 2 is the structured flowchart of generative circuit embodiment 2 frequently provided by the invention.
Fig. 3 is some generative circuit medium frequency synthesis chip and peripheral circuit circuit diagram thereof frequently.
Fig. 4 is passive ring filter circuit circuit diagram.
Fig. 5 is voltage controlled oscillator and power divider circuit figure.
Fig. 6 is low pass filter and amplifier circuit figure.
Fig. 7 is radio-frequency (RF) local oscillator circuit structure block diagram.
Embodiment
Below in conjunction with test example and embodiment, the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.
Embodiment 1: as shown in Fig. 1, Fig. 3, Fig. 4, Fig. 5, Fig. 6, the present embodiment provides a kind of 1600MHz point for radio general measuring instrument radio-frequency (RF) local oscillator circuit generative circuit frequently, comprise N1 in frequency synthesis chip 1 (concrete employing ADF4112 chip, N5 in Fig. 3), passive ring filter circuit 2, voltage controlled oscillator 3 (in Fig. 5 N7), power splitter 4, first low pass filter 5 (in Fig. 6 Z1) and amplifier 6(Fig. 6); Wherein, frequency synthesis chip and crystal oscillation fractional frequency model calling also receive 80MHz reference signal, described frequency synthesis chip 1 also with described passive ring filter circuit 2, voltage controlled oscillator 3, the end to end composition phase-locked loop of power splitter 4; Described power splitter 4 also connects to form output circuit with described low pass filter 5, described amplifier 6 successively.
Further, as shown in Figure 4, described passive ring filter circuit comprises the first resistance R51, and one end a1 of described first resistance R51 is the input of described passive ring filter circuit, and described input a1 is also connected with one end of the first electric capacity C88, one end of the second resistance R50 simultaneously; The other end ground connection of described first electric capacity C88; The other end of described second resistance R50 is by the second electric capacity C90 ground connection; The other end b1 of described first resistance R51 is the output of described passive ring filter circuit, and described output is also connected with one end of the 3rd electric capacity C91, the other end ground connection of described 3rd electric capacity C91.
In Fig. 3, a1 is frequency synthesis chip output mouth, and it is connected with a1 port in Fig. 4; In Fig. 4, b1 is the output port of passive ring filter circuit, and it is connected with b1 port in Fig. 5; In Fig. 5, c1, d1 are two output ports of power splitter 4, its respectively with the c1 port in Fig. 3, d1 port in Fig. 6 connects.
Embodiment 2: be with embodiment 1 difference, in the present embodiment, described generative circuit frequently also comprises the second low pass filter 7 be arranged between the first low pass filter 5 and described amplifier, and it is for exporting 1520MHz point frequently.
Frequently generative circuit provided by the invention is used in a radio general measuring instrument radio-frequency (RF) local oscillator circuit as shown in Figure 7, and described radio-frequency (RF) local oscillator circuit comprises power supply processing module, control module, wideband generation module, crystal oscillation fractional frequency module and point provided by the invention generative circuit frequently; Frequently generative circuit, wideband generation module are connected described crystal oscillation fractional frequency circuit with described power supply processing module, control module, point respectively; Described power supply processing module is used for providing power supply for radio-frequency (RF) local oscillator circuit; Described control module produces suitable local oscillation signal for controlling radio-frequency (RF) local oscillator circuit; Described crystal oscillation fractional frequency circuit is for generation of reference signal; Described frequently generative circuit is for the synthesis of point-frequency signal and export; Described wideband generation module is for generating broadband signal and exporting.
Claims (3)
1., for a some generative circuit frequently for radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, comprise frequency synthesis chip, passive ring filter circuit, voltage controlled oscillator, power splitter, the first low pass filter and amplifier; Wherein, frequency synthesis chip and crystal oscillation fractional frequency model calling also receive reference signal, described frequency synthesis chip also with described passive ring filter circuit, voltage controlled oscillator, the end to end composition phase-locked loop of power splitter; Described power splitter also connects to form output circuit with described low pass filter, described amplifier successively.
2., as claimed in claim 1 for the some generative circuit frequently of radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, described generative circuit frequently also comprises the second low pass filter be arranged between the first low pass filter and described amplifier.
3. as claimed in claim 1 for the some generative circuit frequently of radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, described passive ring filter circuit comprises the first resistance, one end of described first resistance is the input of described passive ring filter circuit, and described input is also connected with one end of the first electric capacity, one end of the second resistance simultaneously; The other end ground connection of described first electric capacity; The other end of described second resistance is by the second capacity earth; The other end of described first resistance is the output of described passive ring filter circuit, and described output is also connected with one end of the 3rd electric capacity, the other end ground connection of described 3rd electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772495.4A CN105245226A (en) | 2015-11-13 | 2015-11-13 | Dot frequency generation circuit for radio-frequency local oscillation circuit of radio integrated measurement instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772495.4A CN105245226A (en) | 2015-11-13 | 2015-11-13 | Dot frequency generation circuit for radio-frequency local oscillation circuit of radio integrated measurement instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105245226A true CN105245226A (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510772495.4A Pending CN105245226A (en) | 2015-11-13 | 2015-11-13 | Dot frequency generation circuit for radio-frequency local oscillation circuit of radio integrated measurement instrument |
Country Status (1)
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| CN (1) | CN105245226A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258327Y (en) * | 1996-06-28 | 1997-07-23 | 清华大学 | High-resolution and broadband linear frequency-scanning signal resource |
| JPH1056379A (en) * | 1996-08-09 | 1998-02-24 | Sharp Corp | Local oscillator circuit |
| CN1318901A (en) * | 2000-04-17 | 2001-10-24 | 松下电器产业株式会社 | Frequency synthesizer |
| CN101039117A (en) * | 2007-02-16 | 2007-09-19 | 中国科学院武汉物理与数学研究所 | Rubidium atom frequency scale digital phase-locking frequency doubler |
| CN202268869U (en) * | 2011-10-17 | 2012-06-06 | 天津七六四通信导航技术有限公司 | 1030 M frequency synthesizer |
| CN202586903U (en) * | 2012-05-08 | 2012-12-05 | 陈志强 | Modulation circuit for controlling passive ultrahigh frequency equipment |
| CN103795410A (en) * | 2014-01-24 | 2014-05-14 | 南京熊猫电子股份有限公司 | Broadband frequency agility frequency source based on double phase-locked loops |
| CN205070980U (en) * | 2015-11-13 | 2016-03-02 | 成都前锋电子仪器有限责任公司 | A point is generating circuit frequently that is used for radio general measuring instrument radio frequency local oscillator circuit |
-
2015
- 2015-11-13 CN CN201510772495.4A patent/CN105245226A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258327Y (en) * | 1996-06-28 | 1997-07-23 | 清华大学 | High-resolution and broadband linear frequency-scanning signal resource |
| JPH1056379A (en) * | 1996-08-09 | 1998-02-24 | Sharp Corp | Local oscillator circuit |
| CN1318901A (en) * | 2000-04-17 | 2001-10-24 | 松下电器产业株式会社 | Frequency synthesizer |
| CN101039117A (en) * | 2007-02-16 | 2007-09-19 | 中国科学院武汉物理与数学研究所 | Rubidium atom frequency scale digital phase-locking frequency doubler |
| CN202268869U (en) * | 2011-10-17 | 2012-06-06 | 天津七六四通信导航技术有限公司 | 1030 M frequency synthesizer |
| CN202586903U (en) * | 2012-05-08 | 2012-12-05 | 陈志强 | Modulation circuit for controlling passive ultrahigh frequency equipment |
| CN103795410A (en) * | 2014-01-24 | 2014-05-14 | 南京熊猫电子股份有限公司 | Broadband frequency agility frequency source based on double phase-locked loops |
| CN205070980U (en) * | 2015-11-13 | 2016-03-02 | 成都前锋电子仪器有限责任公司 | A point is generating circuit frequently that is used for radio general measuring instrument radio frequency local oscillator circuit |
Non-Patent Citations (1)
| Title |
|---|
| 黄跃成: ""0～3.6GHz频谱仪射频前端关键技术研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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Application publication date: 20160113 |
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| RJ01 | Rejection of invention patent application after publication |