CN205356304U - Local oscillator module is advanced in low phase noise small step based on multiple ring phase locking - Google Patents
Local oscillator module is advanced in low phase noise small step based on multiple ring phase locking Download PDFInfo
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- CN205356304U CN205356304U CN201521079537.8U CN201521079537U CN205356304U CN 205356304 U CN205356304 U CN 205356304U CN 201521079537 U CN201521079537 U CN 201521079537U CN 205356304 U CN205356304 U CN 205356304U
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Abstract
The utility model relates to a microwave communication signal source synthesis technology field, concretely relates to local oscillator module is advanced in low phase noise small step based on multiple ring phase locking. The utility model aims to solve the technical problem that a local oscillator module is advanced in low phase noise small step based on multiple ring phase locking is provided, including single -chip control circuit, reference clock circuit, output loop, reference loop, mixing phase lock circuitry and enlarged output circuit. The output of single -chip control circuit and reference clock circuit all connects the input of output loop and reference loop, refers to the output termination of loop the current feedback input of loop is exported to the input of mixing phase lock circuitry, the output termination of mixing phase lock circuitry, and the input of termination mixing phase lock circuitry is exported to the feedback of output loop, and the output termination of output loop amplifies output circuit's input, and enlarged output circuit's output does the output of local oscillator module is advanced in the superior low phase noise small step of polydispersity ability.
Description
Technical field
This utility model relates to microwave communication signals source synthesis technical field, is specifically related to a kind of based on the little stepping local oscillator module of multi-ring phase-locked Low phase noise.
Background technology
Local oscillator module Main Function is to provide local oscillation signal for converter, and owing to stepping and the phase noise of local oscillation signal will directly influence the final output signal of converter, therefore the local oscillator module of a high-quality is particularly important for the performance indications exporting signal.
High-quality local oscillation signal for realizing the little stepping of Low phase noise mainly adopts DDS technology at present, but while using DDS to realize high-quality local oscillation signal, DDS but cannot be avoided to synthesize the associated stray that can not filter brought while little stairstep signal.And mostly general multi-ring Phase Lock Technique is to use the local oscillation signal of a big stepping of Low phase noise to reduce the phase demodulation frequency exporting loop, thus improving the phase noise of output loop, but while realizing little stepping, inherently premised on the index of making an uproar mutually losing output signal, so use multi-ring phase-locked time, find equilibrium point particularly important realizing little stepping and Low phase noise.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of based on the little stepping local oscillator module of multi-ring phase-locked Low phase noise, this local oscillator module uses multi-ring phase-locked Frequency Synthesis Technique Controlled, finding, in multi-ring Phase locking frequency synthesis pattern, the equilibrium point realizing little stepping and Low phase noise, the local oscillation signal finally to realize a high-quality exports.
The technical solution of the utility model is:
A kind of based on the little stepping local oscillator module of multi-ring phase-locked Low phase noise, including single chip machine controlling circuit, reference clock circuit, output loop, reference loop, mixing phase lock circuitry and amplification output circuit.The outfan of single chip machine controlling circuit and reference clock circuit all connects output loop and the input with reference to loop, input with reference to the output described mixing phase lock circuitry of termination of loop, the feedback input end on the output termination output ring road of mixing phase lock circuitry, the feedback output end of output loop connects the input of mixing phase lock circuitry, the input of the output termination amplification output circuit of output loop, the outfan of amplification output circuit is the outfan of the little stepping local oscillator module of described Low phase noise.
Concrete, output ring route the first phase-locked loop chip, the first loop filter, the first voltage-controlled oscillator (VCO) and the second power splitter composition.The input of the first phase-locked loop chip connects single chip machine controlling circuit and the outfan of reference clock circuit, the input of output termination first loop filter of the first phase-locked loop chip, the input of output termination first voltage-controlled oscillator (VCO) of the first loop filter, the input of output termination second power splitter of the first voltage-controlled oscillator (VCO), the outfan of the second power splitter connects mixing phase lock circuitry and amplification output circuit respectively.
Concrete, reference rings route the second phase-locked loop chip, the second loop filter, the second voltage-controlled oscillator (VCO), the 3rd power splitter and the 3rd amplifier composition.The input of the second phase-locked loop chip connects single chip machine controlling circuit and the outfan of reference clock circuit, the input of output termination second loop filter of the second phase-locked loop chip, the input of output termination second voltage-controlled oscillator (VCO) of the second loop filter, the input of output termination the 3rd power splitter of the second voltage-controlled oscillator (VCO), the outfan of the 3rd power splitter connects the input of mixing phase lock circuitry and the 3rd amplifier respectively, the feedback reception end of output termination second phase-locked loop chip of the 3rd amplifier.
Concrete, mixing phase lock circuitry is made up of frequency mixer, the 4th amplifier and the first wave filter.The input termination output ring road of frequency mixer and the outfan with reference to loop, the input of output termination the 4th amplifier of frequency mixer, the input of output termination first wave filter of the 4th amplifier, the feedback input end on the output termination output ring road of the first wave filter.
Concrete, amplification output circuit is made up of the 5th amplifier, the second wave filter and the first isolator.The outfan on the input termination output ring road of the 5th amplifier, the input of output termination second wave filter of the 5th amplifier, the input of output termination first isolator of the second wave filter, the outfan of the first isolator is the outfan of the little stepping local oscillator module of described Low phase noise.
The beneficial effects of the utility model: local oscillator module of the present utility model utilizes multi-ring phase-locked Frequency Synthesis Technique Controlled frequency synthesis source, multi-ring Phase locking frequency synthesis pattern finds the equilibrium point realizing little stepping and Low phase noise, finally achieve the local oscillation signal output of high-quality, the bandwidth of its local oscillation signal output is up to 1G, stepping is 1M, dissipates assorted 80dBc.Although this utility model utilizes multi-ring phase-locked Frequency Synthesis Technique Controlled to achieve the optimization to performance of making an uproar mutually, but for realizing the collaborative frequency conversion of two loops (output loop and with reference to loop), complexity abnormal in programme-control and loaded down with trivial details.This utility model adopts output loop and is all the mode of dynamic loop with reference to loop, and wherein, output loop is little stepping small band width, is big stepping experiment output bandwidth with reference to loop, with reference to the big stepping of loopB c Little bandwidth equal to output loopD S .This utility model can realize little stepping and the big bandwidth with reference to loop of output loop simultaneously, can use DDS during prioritization scheme is that output loop is for referencial use to realize less stepping, allocate the frequency multiplication number of times of two loops, the phase of output signal noise that can more be optimized after equilibrium simultaneously.
Accompanying drawing explanation
Fig. 1 is composition schematic diagram of the present utility model.
Fig. 2 is output loop schematic diagram of the present utility model.
Fig. 3 is of the present utility model with reference to loop schematic diagram.
Fig. 4 is mixing phase lock circuitry schematic diagram of the present utility model.
Fig. 5 is amplification output circuit schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As it is shown in figure 1, the local oscillator module of embodiment includes single chip machine controlling circuit, reference clock circuit, output loop, reference loop, mixing phase lock circuitry and amplification output circuit.The outfan of single chip machine controlling circuit and reference clock circuit all connects output loop and the input with reference to loop, input with reference to the output described mixing phase lock circuitry of termination of loop, the feedback input end on the output termination output ring road of mixing phase lock circuitry, the feedback output end of output loop connects the input of mixing phase lock circuitry, the input of the output termination amplification output circuit of output loop, the outfan of amplification output circuit is the outfan of the little stepping local oscillator module of described Low phase noise.
Reference clock circuit in the present embodiment is made up of crystal oscillator, the first amplifier and the first power splitter three part.The input of output termination first amplifier of crystal oscillator, the input of output termination first power splitter of the first amplifier, two outfans of the first power splitter connect output loop and respectively with reference to loop.
As in figure 2 it is shown, the output ring in embodiment route the first phase-locked loop chip, the first loop filter, the first voltage-controlled oscillator (VCO) and the second power splitter composition.The input of the first phase-locked loop chip connects single chip machine controlling circuit and the outfan of reference clock circuit, the input of output termination first loop filter of the first phase-locked loop chip, the input of output termination first voltage-controlled oscillator (VCO) of the first loop filter, the input of output termination second power splitter of the first voltage-controlled oscillator (VCO), the outfan of the second power splitter connects mixing phase lock circuitry and amplification output circuit respectively.
As it is shown on figure 3, the reference rings in embodiment route the second phase-locked loop chip, the second loop filter, the second voltage-controlled oscillator (VCO), the 3rd power splitter and the 3rd amplifier composition.The input of the second phase-locked loop chip connects single chip machine controlling circuit and the outfan of reference clock circuit, the input of output termination second loop filter of the second phase-locked loop chip, the input of output termination second voltage-controlled oscillator (VCO) of the second loop filter, the input of output termination the 3rd power splitter of the second voltage-controlled oscillator (VCO), the outfan of the 3rd power splitter connects the input of mixing phase lock circuitry and the 3rd amplifier respectively, the feedback reception end of output termination second phase-locked loop chip of the 3rd amplifier.
As shown in Figure 4, the mixing phase lock circuitry in embodiment is made up of frequency mixer, the 4th amplifier and the first wave filter.The input termination output ring road of frequency mixer and the outfan with reference to loop, the input of output termination the 4th amplifier of frequency mixer, the input of output termination first wave filter of the 4th amplifier, the feedback input end on the output termination output ring road of the first wave filter.
As it is shown in figure 5, the amplification output circuit in embodiment is made up of the 5th amplifier, the second wave filter and the first isolator.The outfan on the input termination output ring road of the 5th amplifier, the input of output termination second wave filter of the 5th amplifier, the input of output termination first isolator of the second wave filter, the outfan of the first isolator is the outfan of the little stepping local oscillator module of described Low phase noise.
The work process of embodiment is as follows:
Reference clock circuit output two-way 10MHz reference signal, two-way 10MHz signal is respectively connected to reference to loop and output loop.With reference to loop under the control of single chip machine controlling circuit, realizing 7900～8900MHz by the excitation of 10MHz signal and export with the 20M signal being stepping, this 7900～8900MHz signal accesses mixing phase lock circuitry.Output loop, under the control of single chip machine controlling circuit, realizes the output of 8500～9500MHz signal by the excitation of 10MHz signal, and this 8500～9500MHz signal divides two-way by power splitter merit, is respectively connected to amplification output circuit and mixing phase lock circuitry.The output signal of reference the loop accessed with output loop is mixed by mixing phase lock circuitry, generates 600～620MHz signal and returns to and export loop and carry out 1M stepping phase demodulation, and output ring road completes to stablize phase-locked the most finally.And export another road 8500～9500MHz signal that loop merit divides and access amplification output circuit again and be amplified, the most finally single chip machine controlling circuit control lower can realize the spurious performance little stairstep signal of superior Low phase noise.
The above embodiment is only preferred embodiment of the present utility model, and is not the exhaustive of the feasible enforcement of this utility model.For persons skilled in the art, any apparent change under the premise without departing substantially from this utility model principle and spirit, it is done, all should be contemplated as falling with within claims of the present utility model.
Claims (5)
1. one kind based on the little stepping local oscillator module of multi-ring phase-locked Low phase noise, it is characterised in that it include single chip machine controlling circuit, reference clock circuit, output loop, with reference to loop, mixing phase lock circuitry and amplification output circuit；The outfan of described single chip machine controlling circuit and reference clock circuit all connects output loop and the input with reference to loop, the described output with reference to loop terminates the input of described mixing phase lock circuitry, the feedback input end on the output termination output ring road of described mixing phase lock circuitry, the feedback output end of described output loop connects the input of mixing phase lock circuitry, the input of the output termination amplification output circuit of described output loop, the outfan of described amplification output circuit is the outfan of the little stepping local oscillator module of described Low phase noise.
2. according to claim 1 a kind of based on the little stepping local oscillator module of multi-ring phase-locked Low phase noise, it is characterised in that described output ring route the first phase-locked loop chip, the first loop filter, the first voltage-controlled oscillator (VCO) and the second power splitter composition；The input of described first phase-locked loop chip connects single chip machine controlling circuit and the outfan of reference clock circuit, the input of output termination first loop filter of described first phase-locked loop chip, the input of output termination first voltage-controlled oscillator (VCO) of described first loop filter, the input of output termination second power splitter of described first voltage-controlled oscillator (VCO), the outfan of described second power splitter connects mixing phase lock circuitry and amplification output circuit respectively.
3. according to claim 1 a kind of based on the little stepping local oscillator module of multi-ring phase-locked Low phase noise, it is characterised in that described reference rings route the second phase-locked loop chip, the second loop filter, the second voltage-controlled oscillator (VCO), the 3rd power splitter and the 3rd amplifier composition；The input of described second phase-locked loop chip connects single chip machine controlling circuit and the outfan of reference clock circuit, the input of output termination second loop filter of described second phase-locked loop chip, the input of output termination second voltage-controlled oscillator (VCO) of described second loop filter, the input of output termination the 3rd power splitter of described second voltage-controlled oscillator (VCO), the outfan of described 3rd power splitter connects the input of mixing phase lock circuitry and the 3rd amplifier respectively, the feedback reception end of output termination second phase-locked loop chip of described 3rd amplifier.
4. according to claim 1 a kind of based on the little stepping local oscillator module of multi-ring phase-locked Low phase noise, it is characterised in that described mixing phase lock circuitry is made up of frequency mixer, the 4th amplifier and the first wave filter；The input termination output ring road of described frequency mixer and the outfan with reference to loop, the input of output termination the 4th amplifier of described frequency mixer, the input of output termination first wave filter of described 4th amplifier, the feedback input end on the output termination output ring road of described first wave filter.
5. according to claim 1 a kind of based on the little stepping local oscillator module of multi-ring phase-locked Low phase noise, it is characterised in that described amplification output circuit is made up of the 5th amplifier, the second wave filter and the first isolator；The outfan on the input termination output ring road of described 5th amplifier, the input of output termination second wave filter of described 5th amplifier, the input of output termination first isolator of described second wave filter, the outfan of described first isolator is the outfan of the little stepping local oscillator module of described Low phase noise.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521079537.8U CN205356304U (en) | 2015-12-23 | 2015-12-23 | Local oscillator module is advanced in low phase noise small step based on multiple ring phase locking |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521079537.8U CN205356304U (en) | 2015-12-23 | 2015-12-23 | Local oscillator module is advanced in low phase noise small step based on multiple ring phase locking |
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| CN205356304U true CN205356304U (en) | 2016-06-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109508477A (en) * | 2018-10-09 | 2019-03-22 | 南京沁智电子科技有限公司 | It mutually makes an uproar under a kind of vibration environment and deteriorates low clock distribution block |
-
2015
- 2015-12-23 CN CN201521079537.8U patent/CN205356304U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109508477A (en) * | 2018-10-09 | 2019-03-22 | 南京沁智电子科技有限公司 | It mutually makes an uproar under a kind of vibration environment and deteriorates low clock distribution block |
| CN109508477B (en) * | 2018-10-09 | 2023-08-18 | 南京沁智电子科技有限公司 | Clock distribution module with low phase noise degradation in vibration environment |
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