CN205070990U - A crystal oscillator frequency dividing circuit that is used for radio general measuring instrument radio frequency local oscillator circuit - Google Patents
A crystal oscillator frequency dividing circuit that is used for radio general measuring instrument radio frequency local oscillator circuit Download PDFInfo
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- CN205070990U CN205070990U CN201520901495.5U CN201520901495U CN205070990U CN 205070990 U CN205070990 U CN 205070990U CN 201520901495 U CN201520901495 U CN 201520901495U CN 205070990 U CN205070990 U CN 205070990U
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- circuit
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- frequency
- measuring instrument
- general measuring
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Abstract
The utility model discloses a crystal oscillator frequency dividing circuit that is used for radio general measuring instrument radio frequency local oscillator circuit, including the harmonious voltage module of DAC, crystal oscillator and the clock snubber circuit who connects gradually, the harmonious voltage module of DAC is used for providing the power for crystal oscillator, crystal oscillator is used for producing benchmark reference signal, clock snubber circuit is used for being local oscillator production circuit, general measuring instrument radio frequency module first detector and general measuring instrument signal processing module respectively according to received benchmark reference signal provides mirror looks reference signal. This circuit can provide multiple local oscillator signal for handheld radio comprehensive tester radio frequency local oscillator circuit to 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 crystal oscillation fractional frequency circuit for radio general measuring instrument radio-frequency (RF) local oscillator circuit.
Background technology
Adopt single test at communicator field test instrument at present, an instrument is only measured a few functions, and can not realize the measurement of several functions, therefore its radio-frequency (RF) local oscillator circuit adopted also can only realize a kind of output of frequency mostly.
Utility model content
The purpose of this utility model is for a kind of held radio comprehensive tester provides the radio circuit of multiple inner local oscillation signal, thus makes comprehensive tester can realize the measurement of several functions simultaneously.
In order to realize above-mentioned utility model object, the utility model provides following technical scheme:
For a crystal oscillation fractional frequency circuit for radio general measuring instrument radio-frequency (RF) local oscillator circuit, comprise the DAC tuning voltage module, crystal oscillator and the clock buffer circuit that connect successively; Described DAC tuning voltage module is used for providing power supply for crystal oscillator, and described crystal oscillator is for generation of reference signal; Described clock buffer circuit is used for being respectively local oscillator generation circuit, general measuring instrument radio-frequency module frequency mixer and general measuring instrument signal processing module according to the reference signal received provides phase demodulation reference signal.
Further, described crystal oscillator produces 80MHz reference signal.
Further, described crystal oscillation fractional frequency circuit comprises two and the clock buffer circuit connect, described two and the clock buffer circuit connect is respectively 4 road local oscillation circuits, general measuring instrument radio-frequency module frequency mixer and general measuring instrument signal processing module provides phase demodulation reference signal.
Further, the every road of described clock buffer circuit exports and is provided with a low-pass filter circuit.
Further, a reverse swing door circuit is provided with between described crystal oscillator and described clock buffer circuit.
The crystal oscillation fractional frequency 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 crystal oscillation fractional frequency circuit that provides of synthesis module, wideband generation module and the utility model; Frequently synthesis module, 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 synthesis module is for the synthesis of point-frequency signal and export; Described wideband generation module is for generating broadband signal and exporting.
Further, described synthesis module frequently comprises 1520MHz spot-frequency local oscillation output circuit and 1600MHz spot-frequency local oscillation output circuit.
Further, described wideband generation module comprises 1691MHz-2991MHz wideband local oscillator output circuit and 1690.7MHz-2990.7MHz wideband local oscillator output circuit.
Compared with prior art, the beneficial effects of the utility model: for held radio comprehensive tester radio-frequency (RF) local oscillator circuit provides multiple local oscillation signal, thus make comprehensive tester simultaneously can realize the measurement of several functions.
Accompanying drawing illustrates:
Fig. 1 is crystal oscillation fractional frequency electrical block diagram in the utility model embodiment.
Fig. 2 is DAC tuning voltage module circuit diagram.
Fig. 3 is crystal oscillator and clock buffer circuit circuit diagram.
Fig. 4 is low-pass filter circuit circuit diagram.
Fig. 5 is radio-frequency (RF) local oscillator circuit integrity structured flowchart.
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 Figures 1 to 4, the present embodiment provides a kind of crystal oscillation fractional frequency circuit for radio general measuring instrument radio-frequency (RF) local oscillator circuit, comprise connect successively DAC tuning voltage module 1, crystal oscillator 2 and two clock buffer circuit 3 connect; Described DAC tuning voltage module 1 is for providing power supply for crystal oscillator 2, and described crystal oscillator 2 is for generation of reference signal; Described clock buffer circuit 3 provides phase demodulation reference signal for being respectively 4 road local oscillator generation circuits, general measuring instrument radio-frequency module frequency mixer and general measuring instrument signal processing module according to the reference signal received; Wherein, as shown in Figure 3, output port a1, the output port a2 of shown clock buffer circuit, output port a3, output port a4 are that 4 road local oscillator generation circuits export phase demodulation reference signals; Output port c is that general measuring instrument radio-frequency module (rf board) frequency mixer exports local oscillation signal; Output port b provides reference signal for general measuring instrument signal processing module.
Further, described crystal oscillator 2 produces 80MHz reference signal.
Further, the every road of described clock buffer circuit 3 exports and is provided with a low-pass filter circuit as shown in Figure 4.
Further, a reverse swing door circuit N15 is provided with between described crystal oscillator 2 and described clock buffer circuit 3.
The crystal oscillation fractional frequency circuit that the utility model provides is used in radio general measuring instrument radio-frequency (RF) local oscillator circuit as shown in Figure 5, and described radio-frequency (RF) local oscillator circuit comprises power supply processing module, control module, the point frequently crystal oscillation fractional frequency circuit that provides of synthesis module, wideband generation module and the utility model; Frequently synthesis module, 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 synthesis module is for the synthesis of point-frequency signal and export; Described wideband generation module is for generating broadband signal and exporting.
Further, described synthesis module frequently comprises 1520MHz spot-frequency local oscillation output circuit and 1600MHz spot-frequency local oscillation output circuit.
Further, described wideband generation module comprises 1691MHz-2991MHz wideband local oscillator output circuit and 1690.7MHz-2990.7MHz wideband local oscillator output circuit.
Claims (5)
1. for a crystal oscillation fractional frequency circuit for radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, comprise the DAC tuning voltage module, crystal oscillator and the clock buffer circuit that connect successively; Described DAC tuning voltage module is used for providing power supply for crystal oscillator, and described crystal oscillator is for generation of reference signal; Described clock buffer circuit is used for being respectively local oscillator generation circuit, general measuring instrument radio-frequency module frequency mixer and general measuring instrument signal processing module according to the reference signal received provides phase demodulation reference signal.
2. as claimed in claim 1 for the crystal oscillation fractional frequency circuit of radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, described crystal oscillator produces 80MHz reference signal.
3. as claimed in claim 1 for the crystal oscillation fractional frequency circuit of radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, described crystal oscillation fractional frequency circuit comprises two and the clock buffer circuit connect, described two and the clock buffer circuit connect is respectively 4 road local oscillation circuits, general measuring instrument radio-frequency module frequency mixer and general measuring instrument signal processing module provides phase demodulation reference signal.
4. as claimed in claim 3 for the crystal oscillation fractional frequency circuit of radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, the every road of described clock buffer circuit exports and is provided with a low-pass filter circuit.
5., as claimed in claim 1 for the crystal oscillation fractional frequency circuit of radio general measuring instrument radio-frequency (RF) local oscillator circuit, it is characterized in that, between described crystal oscillator and described clock buffer circuit, be provided with a reverse swing door circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520901495.5U CN205070990U (en) | 2015-11-13 | 2015-11-13 | A crystal oscillator frequency dividing 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 |
|---|---|---|---|
| CN201520901495.5U CN205070990U (en) | 2015-11-13 | 2015-11-13 | A crystal oscillator frequency dividing circuit that is used for radio general measuring instrument radio frequency local oscillator circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205070990U true CN205070990U (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520901495.5U Expired - Fee Related CN205070990U (en) | 2015-11-13 | 2015-11-13 | A crystal oscillator frequency dividing circuit that is used for radio general measuring instrument radio frequency local oscillator circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205070990U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306091A (en) * | 2015-11-13 | 2016-02-03 | 成都前锋电子仪器有限责任公司 | Crystal oscillation frequency dividing circuit for radio comprehensive measurement instrument radio-frequency local oscillation circuit |
-
2015
- 2015-11-13 CN CN201520901495.5U patent/CN205070990U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306091A (en) * | 2015-11-13 | 2016-02-03 | 成都前锋电子仪器有限责任公司 | Crystal oscillation frequency dividing circuit for radio comprehensive measurement instrument radio-frequency local oscillation circuit |
| CN105306091B (en) * | 2015-11-13 | 2018-11-09 | 成都前锋电子仪器有限责任公司 | Crystal oscillation fractional frequency 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 |
Granted publication date: 20160302 Termination date: 20191113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |