CN205105195U - A wide band generating circuit that is used for radio general measuring instrument radio frequency local oscillator circuit - Google Patents
A wide band generating circuit that is used for radio general measuring instrument radio frequency local oscillator circuit Download PDFInfo
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- CN205105195U CN205105195U CN201520910152.5U CN201520910152U CN205105195U CN 205105195 U CN205105195 U CN 205105195U CN 201520910152 U CN201520910152 U CN 201520910152U CN 205105195 U CN205105195 U CN 205105195U
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Abstract
The utility model discloses a wide band generating circuit that is used for radio general measuring instrument radio frequency local oscillator circuit, including frequency synthesis chip, passive ring filter circuit, low pass filter, amplifier and pi type attenuation network and high pass filter circuit, 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 filter circuit constitutes the phase -locked loop circuit, and simultaneously, the frequency synthesis chip still in proper order with low pass filter the amplifier and wide band local oscillator signal is exported to pi type attenuation network and high -pass filter circuit connection. The utility model provides a wide band generating circuit simple structure, operation are stably, because much more more its simple structure can make the interior integrated wide band generating circuit who has of handheld radio comprehensive tester 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 wideband generative circuit for radio general measuring instrument radio-frequency (RF) local oscillator circuit
Background technology
Wideband generative circuit is for the important component part in radio communication device field test instrument, but existing wideband generative circuit exists circuit complexity mostly, the problem of fluctuation of service.
Utility model content
The purpose of this utility model is for a kind of held radio comprehensive tester provides a kind of structure simple, stable wideband generative circuit.
In order to realize above-mentioned utility model object, the utility model provides following technical scheme:
For a wideband generative circuit for radio general measuring instrument radio-frequency (RF) local oscillator circuit, comprise frequency synthesis chip, passive ring filter circuit, low pass filter, amplifier and π type attenuation network and high-pass filtering circuit; Wherein, described frequency synthesis chip and crystal oscillation fractional frequency model calling also receive reference signal, and described frequency synthesis chip also forms phase-locked loop circuit with described passive ring filter circuit; Meanwhile, described frequency synthesis chip is also connected with described low pass filter, described amplifier and described π type attenuation network and high-pass filtering circuit and exports wideband local oscillation signal successively.
Further, described passive ring filter circuit comprises the first resistance, the second 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 3rd resistance simultaneously; The other end ground connection of described first electric capacity; The other end of described 3rd resistance is by the second capacity earth; The other end of described first resistance is connected with one end of described second resistance, and the other end of described second 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 4th electric capacity of one end ground connection is also provided with between described first resistance and the second resistance.
Further, described π type attenuation network and high-pass filtering circuit comprise the 5th electric capacity, the 6th electric capacity and the 7th electric capacity that are connected in series successively, the free end of wherein said 5th electric capacity is the input of described π type attenuation network and high-pass filtering circuit, and the free end of described 7th electric capacity is the output of described π type attenuation network and high-pass filtering circuit; The first inductance of one end ground connection is provided with between described 5th electric capacity and the 6th electric capacity; The second inductance of one end ground connection is provided with between described 6th electric capacity and the 7th electric capacity.
The wideband generative circuit that the utility model provides 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, the point frequently wideband generative circuit that provides of generation module, crystal oscillation fractional frequency module and the utility model; Described crystal oscillation fractional frequency circuit is connected with described power supply processing module, control module, wideband generative circuit, some frequency generation module 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 wideband generative circuit is for the synthesis of point-frequency signal and export; Described generation module is frequently for generating broadband signal and exporting.
Compared with prior art, the beneficial effects of the utility model: the wideband generative circuit structure that the utility model provides is simple, stable; Due to its simple structure, can make in held radio comprehensive tester, to be integrated with more wideband generative circuit, thus generate multiple inner local oscillation signal, and then make comprehensive tester can realize the measurement of several functions simultaneously.
Accompanying drawing illustrates:
The wideband generative circuit structured flowchart that Fig. 1 provides for the utility model.
Fig. 2 is wideband generative circuit medium frequency synthesis chip and peripheral circuit circuit diagram thereof.
Fig. 3 is passive ring filter circuit circuit diagram.
Fig. 4 is low pass filter and amplifier circuit figure.
Fig. 5 is π type attenuation network and high-pass filtering circuit circuit diagram.
Fig. 6 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 to 5, the present embodiment provides a kind of (1691 ~ 2991) MHz for radio general measuring instrument radio-frequency (RF) local oscillator circuit or (1690.7 ~ 2990.7) MHz wideband generative circuit, comprise frequency synthesis chip 1 (concrete employing HMC830 chip, D1 in Fig. 2), passive ring filter circuit 2, low pass filter 3, amplifier 4 and π type attenuation network and high-pass filtering circuit 5; Wherein, described frequency synthesis chip 1 is with crystal oscillation fractional frequency model calling and receive 80MHz reference signal, and described frequency synthesis chip 1 also forms phase-locked loop circuit with described passive ring filter circuit 2; Meanwhile, described frequency synthesis chip 1 is also connected with described low pass filter 3, described amplifier 4 and described π type attenuation network and high-pass filtering circuit 5 successively and exports (1691 ~ 2991) MHz or (1690.7 ~ 2990.7) MHz wideband local oscillation signal.
Further, described passive ring filter circuit 2 comprises the first resistance R72, the second resistance R74, one end b1 of described first resistance R70 is the input of described passive ring filter circuit 2, and described input b1 is also connected with one end of the first electric capacity C101, one end of the 3rd resistance R72 simultaneously; The other end ground connection of described first electric capacity C101; The other end of described 3rd resistance R72 is by the second electric capacity C102 ground connection; The other end of described first resistance R70 is connected with one end of described second resistance R74, the other end c1 of described second resistance R74 is the output of described passive ring filter circuit 2, described output c2 is also connected with one end of the 3rd electric capacity C11, the other end ground connection of described 3rd electric capacity C11; The 4th electric capacity C39 of one end ground connection is also provided with between described first resistance R70 and the second resistance R74.
Further, as shown in Figure 5, described π type attenuation network and high-pass filtering circuit 5 comprise the 5th electric capacity C172, the 6th electric capacity C170 and the 7th electric capacity C168 that are connected in series successively, the free end d1 of wherein said 5th electric capacity C172 is the input of described π type attenuation network and high-pass filtering circuit 5, and the free end of described 7th electric capacity c168 is the output of described π type attenuation network and high-pass filtering circuit 5; The first inductance L 19 of one end ground connection is provided with between described 5th electric capacity C172 and the 6th electric capacity C170; The second inductance L 18 of one end ground connection is provided with between described 6th electric capacity C170 and the 7th electric capacity C168.
A1 port in Fig. 2, b1 port are the output circuit of described frequency synthesis chip 1, and wherein in b1 and Fig. 3, b1 port connects, and the c1 port in Fig. 3 is connected with the c1 port in Fig. 2; A1 port in Fig. 2 is connected with the a1 port in Fig. 4; D1 port in Fig. 4 is connected with the d1 port in Fig. 5.
The wideband generative circuit that the utility model provides is used in a radio general measuring instrument radio-frequency (RF) local oscillator circuit as shown in Figure 6, and described radio-frequency (RF) local oscillator circuit comprises power supply processing module, control module, the point frequently wideband generative circuit that provides of generation module, crystal oscillation fractional frequency module and the utility model; Described crystal oscillation fractional frequency circuit is connected with described power supply processing module, control module, wideband generative circuit, some frequency generation module 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 wideband generative circuit is for the synthesis of point-frequency signal and export; Described generation module is frequently for generating broadband signal and exporting.
Claims (3)
1. for a wideband generative circuit for radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, comprise frequency synthesis chip, passive ring filter circuit, low pass filter, amplifier and π type attenuation network and high-pass filtering circuit; Wherein, described frequency synthesis chip and crystal oscillation fractional frequency model calling also receive reference signal, and described frequency synthesis chip also forms phase-locked loop circuit with described passive ring filter circuit; Meanwhile, described frequency synthesis chip is also connected with described low pass filter, described amplifier and described π type attenuation network and high-pass filtering circuit and exports wideband local oscillation signal successively.
2. as claimed in claim 1 for the wideband generative circuit 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, the second 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 3rd resistance simultaneously; The other end ground connection of described first electric capacity; The other end of described 3rd resistance is by the second capacity earth; The other end of described first resistance is connected with one end of described second resistance, and the other end of described second 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 4th electric capacity of one end ground connection is also provided with between described first resistance and the second resistance.
3. as claimed in claim 1 for the wideband generative circuit of radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, described π type attenuation network and high-pass filtering circuit comprise the 5th electric capacity, the 6th electric capacity and the 7th electric capacity that are connected in series successively, the free end of wherein said 5th electric capacity is the input of described π type attenuation network and high-pass filtering circuit, and the free end of described 7th electric capacity is the output of described π type attenuation network and high-pass filtering circuit; The first inductance of one end ground connection is provided with between described 5th electric capacity and the 6th electric capacity; The second inductance of one end ground connection is provided with between described 6th electric capacity and the 7th electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520910152.5U CN205105195U (en) | 2015-11-13 | 2015-11-13 | A wide band generating circuit that is used for radio general measuring instrument radio frequency local oscillator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520910152.5U CN205105195U (en) | 2015-11-13 | 2015-11-13 | A wide band generating circuit that is used for radio general measuring instrument radio frequency local oscillator circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205105195U true CN205105195U (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520910152.5U Expired - Fee Related CN205105195U (en) | 2015-11-13 | 2015-11-13 | A wide band generating circuit that is used for radio general measuring instrument radio frequency local oscillator circuit |
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| CN (1) | CN205105195U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262485B (en) * | 2015-11-13 | 2018-05-04 | 成都前锋电子仪器有限责任公司 | A kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit |
-
2015
- 2015-11-13 CN CN201520910152.5U patent/CN205105195U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262485B (en) * | 2015-11-13 | 2018-05-04 | 成都前锋电子仪器有限责任公司 | A kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160323 Termination date: 20191113 |