CN110176929A - A kind of binary channels local oscillator source module receiving system simultaneously for shortwave two-way - Google Patents
A kind of binary channels local oscillator source module receiving system simultaneously for shortwave two-way Download PDFInfo
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- CN110176929A CN110176929A CN201910539320.7A CN201910539320A CN110176929A CN 110176929 A CN110176929 A CN 110176929A CN 201910539320 A CN201910539320 A CN 201910539320A CN 110176929 A CN110176929 A CN 110176929A
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- local oscillator
- buffer circuit
- way
- shortwave
- receiving system
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- 230000003321 amplification Effects 0.000 claims abstract description 26
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 26
- 239000013078 crystal Substances 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
- H03L7/104—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using an additional signal from outside the loop for setting or controlling a parameter in the loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
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- Transmitters (AREA)
- Transceivers (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
The invention discloses a kind of binary channels local oscillator source modules for receiving system simultaneously for shortwave two-way, including High Accuracy Constant Temperature crystal oscillator, clock buffer circuit, DDS module, embedded controller, amplification/buffer circuit and frequency mixer；The output signal of the High Accuracy Constant Temperature crystal oscillator is input to DDS module as reference clock after clock buffer circuit；The DDS module, using reference clock signal quadruple as standard time clock, and generates two-way local oscillator output signal under the control of embedded controller；The two-way local oscillator output signal respectively exports after an amplification/buffer circuit respectively to two frequency mixers.The present invention realizes the binary channels local oscillator way of output of full duplex, adapts to shortwave two-way while receiving system, realizes that two-way short-wave signal receives demodulation simultaneously, especially suitable for the quick link setup device of broadband frequency sweep.
Description
Technical field
The present invention relates to frequency signal source domain, in particular to a kind of binary channels for receiving system simultaneously for shortwave two-way
Local oscillator source module.
Background technique
Direct digital synthesis technique (DDS) has the frequency error factor speed, high frequency resolution, lower phase being exceedingly fast
The advantages that position noise, these advantages are particularly suitable for the applied field that scan frequency communication etc. requires frequency quickly to change and capture
It closes.With the development of semiconductor technology, DDS technology be have been relatively mature, and a piece of DDS chip has not only been merely comprising phase
The cores such as accumulator, ROM look-up table, DA conversion, are equally integrated with phase lock circuitry, frequency multiplier circuit as clock and generate list
Member.
In the quick link setup device of broadband frequency sweep, needs two-way short-wave reception system to work at the same time, therefore need one kind can
The local oscillator source module of Bipath parent oscillation source signal is generated simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of binary channels local oscillator source modules for receiving system simultaneously for shortwave two-way, with full
Sufficient shortwave two-way receives the need of work of system simultaneously.
Realizing the technical solution of the object of the invention is: a kind of for shortwave two-way while to receive the binary channels local vibration source of system
Module, including High Accuracy Constant Temperature crystal oscillator, clock buffer circuit, DDS module, embedded controller, amplification/buffer circuit and mixing
Device；The output signal of the High Accuracy Constant Temperature crystal oscillator is input to DDS module as reference clock after clock buffer circuit；It is described
DDS module, using reference clock signal quadruple as standard time clock, and generates two-way local oscillator under the control of embedded controller
Output signal；The two-way local oscillator output signal respectively exports after an amplification/buffer circuit respectively to two frequency mixers.
The High Accuracy Constant Temperature crystal oscillator exports 110.592MHz signal；Control of the DDS module in embedded controller
It is lower using reference clock signal quadruple to 442.368MHz as standard time clock.
The DDS module is under the control of embedded controller by internal frequency multiplier circuit by reference clock signal quadruple
As standard time clock.
The frequency for the two-way local oscillator output signal that the DDS module generates is 72.055MHz~100.455MHz.
The DDS module is using the dedicated integrated DDS chip of AD99XX series, or is programmed and realized by FPGA device.
Amplification/the buffer circuit includes the fixed gain amplifier and LC bandpass filter of electrical connection.
The free transmission range of the LC bandpass filter is 70MHz~100.5MHz.
The High Accuracy Constant Temperature crystal oscillator, clock buffer circuit, DDS module, embedded controller and amplification/buffer circuit are equal
Individually power supply.Specifically: the High Accuracy Constant Temperature crystal oscillator, DDS module, embedded controller and amplification/buffer circuit are all made of
The isolation power supply of independent voltage stabilizing chip, and in PCB layout to High Accuracy Constant Temperature crystal oscillator, clock buffer circuit, DDS module,
Embedded controller and amplification/buffer circuit are isolated, and will digitally be separated with simulation.
Using above-mentioned technical proposal, the present invention has the following beneficial effects: (1) present invention realizes the double of full duplex
The channel local oscillator way of output adapts to shortwave two-way while receiving system, realizes that two-way short-wave signal receives demodulation simultaneously, especially
Suitable for the quick link setup device of broadband frequency sweep.
(2) DDS module of the invention is believed reference clock by internal frequency multiplier circuit under the control of embedded controller
Number quadruple simplifies circuit design, has key effect to complete machine Miniaturization Design as standard time clock.
(3) amplification of the invention/buffer circuit filter LC bandpass filter can filter out in the output signal of DDS module
Band spurious frequency signal and smooth amplitude.
(4) free transmission range of LC bandpass filter of the invention is 70MHz~100.5MHz, and the frequency for meeting local vibration source is defeated
It requires out.
(5) High Accuracy Constant Temperature crystal oscillator of the invention, DDS module, embedded controller and amplification/buffer circuit are all made of solely
Power supply is isolated in vertical voltage stabilizing chip, and to High Accuracy Constant Temperature crystal oscillator, clock buffer circuit, DDS module, embedding in PCB layout
Enter formula controller and amplification/buffer circuit is isolated, will digitally be separated with simulation, this design can be by DDS module
Internal interferes with each other the phase noise specifications for being preferably minimized, while improving local vibration source output signal.
Detailed description of the invention
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail, wherein
Fig. 1 is structural block diagram of the invention.
Fig. 2 is amplification/buffer circuit circuit connection diagram of the invention.
Fig. 3 is the circuit connection diagram of DDS module of the invention.
Fig. 4 is the circuit connection diagram of frequency mixer of the invention.
Fig. 5 is the circuit connection diagram of embedded controller of the invention.
Label in attached drawing are as follows:
High Accuracy Constant Temperature crystal oscillator 1, clock buffer circuit 2, DDS module 3, embedded controller 4, amplification/buffer circuit 5,
Frequency mixer 6.
Specific embodiment
(embodiment 1)
See that Fig. 1, the binary channels local oscillator source module of the present embodiment receive system, including high-accuracy and constant for shortwave two-way simultaneously
Warm crystal oscillator 1, clock buffer circuit 2, DDS module 3, embedded controller 4, amplification/buffer circuit 5 and frequency mixer 6.
High Accuracy Constant Temperature crystal oscillator 1 exports 110.592MHz signal and is input to after clock buffer circuit 2 as reference clock
DDS module 3.DDS module 3 is under the control of embedded controller 4 by internal frequency multiplier circuit by reference clock signal quadruple
To 442.368MHz as standard time clock, and generate the two-way local oscillator output signal that frequency is 72.055MHz~100.455MHz.
Two-way local oscillator output signal respectively after an amplification/buffer circuit 5, believe by the local oscillator as the full bilateral of short-wave receiver binary channels
It number is exported respectively to two frequency mixers 6.
DDS module 3, by reference clock signal quadruple, simplifies circuit design by internal frequency multiplier circuit, to whole
Machine Miniaturization Design has key effect.DDS module 3 in the present embodiment uses AD9958 chip, and the circuit of DDS module 3 connects
Map interlinking is as shown in Figure 3.DDS module 3 can also be programmed by FPGA device and be realized.
Amplification/buffer circuit 5 includes the fixed gain amplifier and LC bandpass filter of electrical connection.LC bandpass filter energy
Enough filter out the band spurious frequency signal in the output signal of DDS module 3 and smooth amplitude.The free transmission range of LC bandpass filter
For 70MHz~100.5MHz, meet the rate-adaptive pacemaker requirement of local vibration source.The circuit connection diagram of amplification/buffer circuit 5 such as Fig. 2 institute
Show.
Frequency mixer 6 in the present embodiment uses AD8342 frequency mixer, and circuit connection diagram is as shown in Figure 4.
Embedded controller 4 uses arm processor, and chip model LPC1768, circuit connection diagram is as shown in Figure 5.
The individually power supply of High Accuracy Constant Temperature crystal oscillator 1, DDS module 3, embedded controller 4 and amplification/buffer circuit 5, specifically
Are as follows: High Accuracy Constant Temperature crystal oscillator 1, DDS module 3, embedded controller 4 and amplification/buffer circuit 5 are all made of independent voltage stabilizing chip
Isolation power supply, and to High Accuracy Constant Temperature crystal oscillator 1, clock buffer circuit 2, DDS module 3, embedded controller in PCB layout
4 and amplification/buffer circuit 5 be isolated, will digitally with simulation separate.
The binary channels local oscillator source module of the present embodiment realizes the binary channels local oscillator way of output of full duplex, adapts to shortwave
Two-way receives system simultaneously, realizes that two-way short-wave signal receives demodulation simultaneously, especially suitable for the quick link setup device of broadband frequency sweep.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (9)
1. a kind of binary channels local oscillator source module for receiving system simultaneously for shortwave two-way, it is characterised in that: including high-accuracy and constant
Warm crystal oscillator (1), clock buffer circuit (2), DDS module (3), embedded controller (4), amplification/buffer circuit (5) and frequency mixer
(6)；The output signal of the High Accuracy Constant Temperature crystal oscillator (1) is input to DDS mould as reference clock after clock buffer circuit (2)
Block (3)；The DDS module (3) is under the control of embedded controller (4) using reference clock signal quadruple as when standard
Clock, and generate two-way local oscillator output signal；The two-way local oscillator output signal is respectively divided after an amplification/buffer circuit (5)
It Shu Chu not be to two frequency mixers (6).
2. a kind of binary channels local oscillator source module for receiving system simultaneously for shortwave two-way according to claim 1, special
Sign is: the High Accuracy Constant Temperature crystal oscillator (1) exports 110.592MHz signal；The DDS module (3) is in embedded controller
(4) using reference clock signal quadruple to 442.368MHz as standard time clock under control.
3. a kind of binary channels local oscillator source module for receiving system simultaneously for shortwave two-way according to claim 1, special
Sign is: the DDS module (3) passes through internal frequency multiplier circuit for reference clock signal under the control of embedded controller (4)
Quadruple is as standard time clock.
4. a kind of binary channels local oscillator source module for receiving system simultaneously for shortwave two-way according to claim 1, special
Sign is: the frequency for the two-way local oscillator output signal that the DDS module (3) generates is 72.055MHz~100.455MHz.
5. a kind of binary channels local oscillator source module for receiving system simultaneously for shortwave two-way according to claim 1, special
Sign is: the DDS module (3) is using the dedicated integrated DDS chip of AD99XX series, or is programmed and realized by FPGA device.
6. a kind of binary channels local oscillator source module for receiving system simultaneously for shortwave two-way according to claim 1, special
Sign is: the amplification/buffer circuit (5) includes the fixed gain amplifier and LC bandpass filter of electrical connection.
7. a kind of binary channels local oscillator source module for receiving system simultaneously for shortwave two-way according to claim 6, special
Sign is: the free transmission range of the LC bandpass filter is 70MHz~100.5MHz.
8. a kind of binary channels local oscillator source module for receiving system simultaneously for shortwave two-way according to claim 1, special
Sign is: the High Accuracy Constant Temperature crystal oscillator (1), DDS module (3), embedded controller (4) and amplification/buffer circuit (5) are single
Solely power supply.
9. a kind of binary channels local oscillator source module for receiving system simultaneously for shortwave two-way according to claim 8, special
Sign is: the High Accuracy Constant Temperature crystal oscillator (1), DDS module (3), embedded controller (4) and amplification/buffer circuit (5) are adopted
With independent voltage stabilizing chip be isolated power, and PCB layout on to High Accuracy Constant Temperature crystal oscillator (1), clock buffer circuit (2),
DDS module (3), embedded controller (4) and amplification/buffer circuit (5) are isolated, and will digitally be separated with simulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910539320.7A CN110176929A (en) | 2019-06-20 | 2019-06-20 | A kind of binary channels local oscillator source module receiving system simultaneously for shortwave two-way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910539320.7A CN110176929A (en) | 2019-06-20 | 2019-06-20 | A kind of binary channels local oscillator source module receiving system simultaneously for shortwave two-way |
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| Publication Number | Publication Date |
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| CN110176929A true CN110176929A (en) | 2019-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910539320.7A Pending CN110176929A (en) | 2019-06-20 | 2019-06-20 | A kind of binary channels local oscillator source module receiving system simultaneously for shortwave two-way |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201819A (en) * | 2011-03-07 | 2011-09-28 | 武汉理工大学 | Frequency synthesis source applied by DDS short-wave transmitter based on CPLD design |
| CN203135850U (en) * | 2013-02-06 | 2013-08-14 | 武汉理工大学 | DDS local oscillator source for raising reciprocal mixing index of short wave receiver |
| CN203301455U (en) * | 2013-06-04 | 2013-11-20 | 武汉理工大学 | DDS radio-frequency signal source of frequency stabilized signal source for ion storage |
-
2019
- 2019-06-20 CN CN201910539320.7A patent/CN110176929A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201819A (en) * | 2011-03-07 | 2011-09-28 | 武汉理工大学 | Frequency synthesis source applied by DDS short-wave transmitter based on CPLD design |
| CN203135850U (en) * | 2013-02-06 | 2013-08-14 | 武汉理工大学 | DDS local oscillator source for raising reciprocal mixing index of short wave receiver |
| CN203301455U (en) * | 2013-06-04 | 2013-11-20 | 武汉理工大学 | DDS radio-frequency signal source of frequency stabilized signal source for ion storage |
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