CN205070980U - A point is generating circuit frequently that is used for radio general measuring instrument radio frequency local oscillator circuit - Google Patents
A point is generating circuit frequently that is used for radio general measuring instrument radio frequency local oscillator circuit Download PDFInfo
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- CN205070980U CN205070980U CN201520901223.5U CN201520901223U CN205070980U CN 205070980 U CN205070980 U CN 205070980U CN 201520901223 U CN201520901223 U CN 201520901223U CN 205070980 U CN205070980 U CN 205070980U
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- local oscillator
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Abstract
The utility model discloses a point is generating circuit frequently that is used for radio general measuring instrument radio frequency local oscillator circuit, divide ware, a low pass filter and amplifier including frequency synthesis chip, passive ring filter circuit, voltage controlled oscillator, merit, wherein, the frequency synthesis chip is connected with crystal oscillator frequency module and is received benchmark reference signal, the frequency synthesis chip still with passive ring filter circuit, voltage controlled oscillator, merit divide ware end to end to constitute phase locked loop, the merit divide the ware still in proper order with low pass filter the amplifier connects to form output circuit. The utility model provides a point generating circuit simple structure, operation frequently stably, because much more more its simple structure can make the interior integrated point that has of handheld radio comprehensive tester generating circuit frequently to generate multiple inside local oscillator signal, and then make comprehensive tester can realize the measurement of multiple functions simultaneously.
Description
Technical field
The utility model 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.
Utility model content
The purpose of this utility model is that stable point is generative circuit frequently for a kind of held radio comprehensive tester provides a kind of structure simple.
In order to realize above-mentioned utility model object, the utility model 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.
The point that the utility model provides frequently generative circuit is used in a radio general measuring instrument radio-frequency (RF) local oscillator circuit, and described radio-frequency (RF) local oscillator circuit comprises the some generative circuit frequently that power supply processing module, control module, wideband generation module, crystal oscillation fractional frequency module and the utility model provide; 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, the beneficial effects of the utility model: the point that the utility model provides 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:
Point generative circuit embodiment 1 structured flowchart frequently that Fig. 1 provides for the utility model.
Point generative circuit embodiment 2 structured flowchart frequently that Fig. 2 provides for the utility model.
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 utility model is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the utility model is only limitted to following embodiment, all technology realized based on the utility model content all belong to scope of the present utility model.
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.
The point that the utility model provides frequently generative circuit 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 the some generative circuit frequently that power supply processing module, control module, wideband generation module, crystal oscillation fractional frequency module and the utility model provide; 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 |
|---|---|---|---|
| CN201520901223.5U CN205070980U (en) | 2015-11-13 | 2015-11-13 | A point is generating circuit frequently that is used for radio general measuring instrument radio frequency local oscillator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520901223.5U CN205070980U (en) | 2015-11-13 | 2015-11-13 | A point is generating circuit frequently that is used for radio general measuring instrument radio frequency local oscillator circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205070980U true CN205070980U (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520901223.5U Active CN205070980U (en) | 2015-11-13 | 2015-11-13 | A point is generating circuit frequently that is used for radio general measuring instrument radio frequency local oscillator circuit |
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| CN (1) | CN205070980U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245226A (en) * | 2015-11-13 | 2016-01-13 | 成都前锋电子仪器有限责任公司 | Dot frequency generation circuit for radio-frequency local oscillation circuit of radio integrated measurement instrument |
-
2015
- 2015-11-13 CN CN201520901223.5U patent/CN205070980U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245226A (en) * | 2015-11-13 | 2016-01-13 | 成都前锋电子仪器有限责任公司 | Dot frequency generation circuit for radio-frequency local oscillation circuit of radio integrated measurement instrument |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |