CN106533403A - High-performance isolation, distribution and amplification equipment - Google Patents
High-performance isolation, distribution and amplification equipment Download PDFInfo
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- CN106533403A CN106533403A CN201610945171.0A CN201610945171A CN106533403A CN 106533403 A CN106533403 A CN 106533403A CN 201610945171 A CN201610945171 A CN 201610945171A CN 106533403 A CN106533403 A CN 106533403A
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- jing
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
- H03K6/02—Amplifying pulses
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Abstract
The invention discloses high-performance isolation, distribution and amplification equipment. The equipment comprises a mother board, and a power module, a standard frequency module, a master control module, a front panel and a rear panel which are connected to each other on the mother board, wherein the rear panel is connected to a radio frequency input signal; four ways of signals are output by a power divider in the master control module; the four ways of signals are respectively connected to the standard frequency module; after input buffer and amplification shaping and shot following drive, the four ways of signals are output to the rear panel; the front panel is taken as a display module and adopts a matrix light emitting diode display mode; each light emitting diode is corresponding to a corresponding standard input-output interface. The equipment provided by the invention has high reference frequency signal accuracy and high frequency stability; the equipment can be applied to the related fields of time frequency, such as 3G communication network, state grid corporation of China, railway traffic and national defense and military industry, and the equipment provides various types of multi-port reference clocks for a time frequency system.
Description
Technical field
The present invention relates to a kind of high-performance isolation distribution multiplying arrangement, belongs to time-frequency field of wireless communications.
Background technology
In Modern Communication System, atomic clock is needed for system and accuracy height, the high reference frequency of frequency stability are provided
Signal.As the technology of Field of Time and Frequency develops, the user equipment of reference frequency also becomes increasingly complicated, by original single device
To multi-user installation transition.Whole system needs unified time and frequency to guarantee that respective system is normally run, and meets itself and leads to
The needs of communication service.Due to being limited by load capacity, atomic clock cannot be directly used to multiple cascade devices.Therefore, to atom
Frequency marking output makes a distinction amplification, while realizing the accuracy of frequency marking, the height of degree of stability keeps, harmonic wave, effective suppression of noise
System.
The content of the invention
It is an object of the invention to provide a kind of high-performance isolation distribution multiplying arrangement.
The present invention is adopted the technical scheme that：A kind of high-performance isolation distribution multiplying arrangement, which includes motherboard, and difference
Be arranged on motherboard realize interconnecting power module, mark frequency module, main control module, front panel and rear board, it is described behind
Plate connects radio-frequency input signals, and the power splitter in Jing main control modules exports 4 road signals, and 4 road signals are respectively connected to mark frequency module, and Jing is defeated
Enter buffering, amplify shaping, penetrate with exporting after driving to rear board, the front panel adopts two pole of matrix luminescent as display module
Pipe display mode, each corresponding mark frequency input/output interface of light emitting diode correspondence.
The motherboard is using four layers of printed board design, the wiring of holding wire internal layer, ground wire top layer wiring, while motherboard adopts nothing
Source connector distributed arrangement, adopts board to board connector, motherboard to adopt the straight spring hole scokets of J18, mould between motherboard and each module
Block adopts the curved formula pin plugs of J18.
The equipment plate meets radio-frequency input signals, frequency 10MHz, -20～10dBm of amplitude, in Jing main control modules
Power splitter exports 4 road signals, and 4 road signals are respectively connected to mark frequency module, exports Jing input buffering, amplification shaping, after penetrating with driving
To rear board, output signal amounts to 6 tunnels, is 2 road 10MHz signals respectively, 2 road 5MHz signals, 2 road 1MHz signals, output signal
Amplitude 13dBm ± 1dB.Wherein, the allocative decision of the 10M signals：After atomic clock signal 10M Hz signal input buffers, Jing is put
Deliver to greatly six not gate Schmidt's reversers of 74HC14, after shaping Jing after 2N2222A isolation buffers Jing 10MHz low pass filters,
After filtering higher hamonic wave, single board radio connector is delivered to；The allocative decision of the 5M signals：Atomic clock signal 10M Hz signals are defeated
74HC390 decade frequency divider two divided-frequencies are delivered in Jing amplifications after entering buffering, export Jing 2N2222A isolation buffers after the square wave of 5MHz
Jing 5MHz low pass filters after device, after filtering higher hamonic wave, deliver to single board radio connector；The allocative decision of the 1M signals：
Ten frequency dividing of 74HC390 decade frequency dividers is delivered in Jing amplifications after atomic clock signal 10M Hz signal input buffers, exports 1MHz's
After square wave Jing after 2N2222A isolation buffers Jing 1MHz low pass filters, after filtering higher hamonic wave, deliver to single board radio and patch
Part.
The 2N2222 audions are buffered-display driver pipes, select Motorola low noise amplification pipes, and radiating adopts metal
TO18 is encapsulated；Wave filter adopts low insertion loss, high out-of-side rejection mode filter to filter high-frequency harmonic and high-end clutter letter
Number.
The radio-frequency input signals detects input signal, input signal >=-20dBm using AD8307AR logarithmics amplifier
When, OUT (pin4) output voltage 1.2V send comparator Jing after capacitor filtering, and comparison voltage low level represents normal, otherwise different
Often.Output signal adopts multiplication of voltage diode detection mode, and output signal Jing weak coupling mode is connected to diode, after signal rectification
Comparator is delivered in filtering, and comparison voltage low level represents normal, otherwise extremely.
The power module is powered using civil power and DC source two ways；When civil power and DC source are powered simultaneously,
Civil power is preferentially powered, and when mains failure, automatically switches to DC source and powers, and when city power recovery powers, connects civil power again
Path, it is ensured that uninterrupted power supply.
The power module includes relay K1, relay K2, front panel switch S1, transformator T1, the relay K1
Input connects 24V DC sources, the secondary side winding of relay K2 input connection transformer T1, the primary side winding of transformator T1
Connection 220V civil powers, the normally opened contact of relay K1 connect the back contact of relay K2；It is first turned on front panel switch S1, S1
Closure, if AC and DC is all powered, K1, K2 all adhesives, the dynamic circuit connector of K1, K2 connect and electrically connect, and direct current 24V Jing K1 normally opened contacts are sent to
It is hanging after the back contact of K2, it is impossible to power supply to the device, and the normally opened contact of alternating voltage Jing T1 and K2 send bridge heap VD3, exports+
24V；When AC dump, K2 quits work because of unpowered voltage, and K2 back contacts are connected, K1 still adhesives, now+24V
Path be K1 normally opened contacts, the back contact of K2, VD3, when restoring electricity, K2 switches to normally opened contact, equipment again for exchange
Recover alternate current operation.
The power supply of the mark frequency module adopts secondary isolation mode, power module output+24V power supplys, Jing DC-DC blood pressure lowering cores
Electromagnetic interface filter is delivered to after piece, suppresses high-frequency noise, then the high Ripple Suppression LDO chips output low ripple power supply 5V voltage letters of Jing
Number.
The invention has the beneficial effects as follows：The reference frequency signal accuracy that the present invention is provided is high, and frequency stability is high；Can answer
For temporal frequency association area (such as 3G communication networks, national grid, railway traffic and defence and military etc.), it is that the time frequency system is carried
For polymorphic type, multiport reference clock.
Description of the drawings
Fig. 1 is the composition frame chart of the present invention.
Fig. 2 is the signal diagram of the present invention.
Fig. 3 is mark frequency module interface chip CAT9555 block diagrams.
Fig. 4 is the entire block diagram for marking frequency module.
Fig. 5 is 74HC390 logic charts.
Fig. 6 is circuit for checking input signals block diagram.
Fig. 7 is output signal detection circuit block diagram.
Fig. 8 is warning circuit block diagram.
Fig. 9 is power supply AC and DC conversion and control theory diagram.
Figure 10 is mark frequency module power supply processing circuit.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, this high-performance isolation distribution multiplying arrangement adopts 4U chassis designs, mainly by power module, mark frequency
Unit totally 6 are constituted for module, main control module, front panel, rear board and motherboard.
1) mark frequency module
Mark frequency module is input into all the way, multiple different frequency outputs, is completed frequency expansion, input/output signal detection, is strengthened
Signal carrying load ability.
2) main control module
Using advanced integrated circuit STM32F103RC, with multichannel Peripheral Interface (I2C, SPI, UART) and I/O connect
Mouthful, complete to mark the monitoring of frequency module, and shown by front panel.
3) power module
With AC and DC input function, AC and DC can be higher than direct current supply with seamless switching, Alternating Current Power Supply priority, adopt
With the natural type of cooling, the reliability of equipment is improved.
4) front panel
Using matrix light emitting diode display mode, each light emitting diode correspondence corresponding mark frequency input and output connects
Mouthful.Ship type switch is installed on front panel, control device on and off switch.
5) rear board
Including two class interfaces.One is the input interface of power supply, using XCE type locking nut welding plate formula connectors.Two is mark
The input/output interface of frequency, using BNC radio frequency connectors.
6) motherboard
Motherboard is the interconnection and interflow platform of modules, using passive connector distributed arrangement, between motherboard and module
Using board to board connector (motherboard adopts the straight spring hole scokets of J18, module to adopt the curved formula pin plugs of J18), this connected mode prevents
Device interior low frequency cable connects, and increases equipment dependability and reduces the MTTR.
High-performance isolation distribution multiplying arrangement modules signal diagram, is shown in Fig. 2
1) radiofrequency signal
Equipment plate connects radio-frequency input signals, frequency 10MHz, -20～10dBm of amplitude, the work(in Jing main control modules point
Device exports 4 road signals, PSC-4-1+ (0.1～200MHz of frequency range, the insertion of power splitter model Mini-Circuit company
Loss 0.5dB, isolation 30dBc, amplitude imbalance degree 0.2dB, 6 ° of amplitude imbalance degree), 4 road signals are respectively connected to mark frequency mould
Block, exports to rear board Jing input buffering, amplification shaping, after penetrating with driving.
2) bus signals
Fig. 1 is mark frequency module interface chip CAT9555 block diagrams.Mark frequency module adopts I with main control module2C interface, interface core
Piece is CAT9555 (0～400kbps of message transmission rate, running voltage 2.3V～5.5V).Mark frequency module input/output signal
After detection relatively, become digital data transmission to interface chip, on motherboard, transmit I2C signal.It is achieved in that advantage is：
a)、I2C buses at most can so mark frequency module extension convenient with 16 slaves；
B) it is analogue signal, to mark frequency module rectified signal, if transmitting in motherboard, is easily disturbed by digital signal；
C), veneer mark frequency module detection signal quantity many (1 tunnel is input into, the output of 6 tunnels), if transmitting in motherboard, signal amplitude
Penetrate big, wiring is complicated, the designed lines are succinct, signal radiation is little.
Main control module and display module are transmitted using asynchronous serial port UART, level TTL, baud rate 38400bps.Show mould
Block adopts dichromatic LED LED display modes, normal LED to show green, and abnormal show is red.
The entire block diagram of mark frequency module is shown in Fig. 4.
Input signal is the output from main control module power splitter, connects input port, signal frequency by radio-frequency cable
10MHz, amplitude can receive wide scope -20～10dBm signals, and output signal amounts to 6 tunnels, be 2 road 10MHz signals respectively, 2 tunnels
5MHz signals, 2 road 1MHz signals, amplitude output signal 13dBm ± 1dB.
The allocative decision of 10M signals：After atomic clock signal 10M Hz signal input buffers, Jing amplifies that to deliver to 74H,C14 six non-
Door Schmidt's reverser, after shaping Jing after 2N2222A isolation buffers Jing 10MHz low pass filters, after filtering higher hamonic wave, send
To single board radio connector.
The allocative decision of 5M signals：After atomic clock signal 10M Hz signal input buffers, Jing amplifies and delivers to 7,4HC,390 ten and enter
Frequency divider two divided-frequency processed, export 5MHz square wave after Jing after 2N2222A isolation buffers Jing 5MHz low pass filters, filter high order
After harmonic wave, single board radio connector is delivered to.
The allocative decision of 1M signals：After atomic clock signal 10M Hz signal input buffers, Jing amplifies and delivers to 7,4HC,390 ten and enter
Frequency divider processed ten is divided, export 1MHz square wave after Jing after 2N2222A isolation buffers Jing 1MHz low pass filters, filter high order
After harmonic wave, single board radio connector is delivered to.
The module design is with advantages below：
1 low cost；
2 autgmentabilities are strong；
3 isolations are high；
4 additional phase noises are little；
As shown in figure 5,74HC390 configures different patterns, two divided-frequency and ten frequency dividings are realized.
Two divided-frequency connects：NMR=0, signal input nCP0, signal output nQ0 Jing after two divided-frequency module；
Ten frequency dividing connections：NMR=0, signal input nCP0, two divided-frequency module output nQ0 are connected to nCP1, the frequency dividing moulds of Jing five
Block, signal output nQ2.
2N2222 audions are buffered-display driver pipes, select Motorola low noise amplification pipes, and consider that radiating adopts metal
TO18 is encapsulated.
Wave filter adopts low insertion loss, high out-of-side rejection mode filter to filter high-frequency harmonic and high-end noise signal,
Index is shown in Table 1：
1 Filter specification of table
Input/output fault alarm design：
Such as Fig. 6, Fig. 7, using different detecting ways, input signal detection scope is relatively wide, using right for input, output signal
Number amplifier detecting way, logarithmic detector can provide one with direct current of its input power level in log-linear proportionate relationship
Output voltage.Within its measurement dynamic range, these cymoscopes have good accuracy and the linearity.Amplitude output signal ratio
Higher and constant, using multiplication of voltage diode detection mode, diode detection mode circuit is simple, takes PCB space little.
Input detects input signal using AD8307AR logarithmics amplifier, during input signal >=-20dBm, OUT outputs
Voltage 1.2V, send comparator, comparison voltage low level to represent normal, otherwise extremely Jing after capacitor filtering.Outfan adopts multiplication of voltage
Diode detection mode, output signal Jing weak coupling mode are connected to diode, and signal rectification post filtering is delivered to comparator, compared
Voltage low level represents normal, otherwise extremely.
As Fig. 8, the mark frequency module upper left corner place a dichromatic LED, the I/O signal of input and output detection circuit is carried out
Logical "or", after arbitrary signal detects amplitude offset normal range, not only corresponding I/O port is high level, and veneer is double-colored
Diode shows red alarm, and this design facilitates debugging single board.
Power circuit is designed：
Fig. 2 is power supply AC and DC conversion and control theory diagram.High-performance isolation distribution multiplying arrangement adopts civil power and direct current
Power supply two ways is powered.When civil power and DC source are powered simultaneously, civil power is preferentially powered, and when mains failure, automatically switches
Power to DC source, when city power recovery powers, connect city's electric pathway again, it is ensured that uninterrupted power supply.Mains input voltage
During 220V ± 15%, system worked well.External D.C. regulated power supply voltage be 24V, minus earth.
In Fig. 9, K1, K2 are relay, and S1 is front panel switch, and T1 is transformator.On and off switch on panel is opened, S1 is closed
Close.If AC and DC is all powered, K1, K2 all adhesives.The dynamic circuit connector of K1, K2 connects and electrically connects.Direct current 24V (+) Jing F1, VD1, K1 dynamic circuit connectors
Contact is sent to after the back contact of K2 hanging, it is impossible to power supply to the device.And the normally opened contact of alternating voltage Jing F2, T1 and K2 send bridge
Heap VD3, output+24V.When AC dump, K2 quits work because of unpowered voltage, and K2 back contacts are connected, and K1 still inhales
Close, now the path of+24V is F1, VD1, K1 normally opened contact, the back contact of K2, VD3.When exchange restores electricity, K2 is cut again
Normally opened contact is shifted to, equipment recovers alternate current operation.
Fig. 3 is mark frequency module power supply processing circuit.Mark frequency module adopts secondary isolation mode, and output+24V is electric for power module
Source, Jing motherboards are transmitted to mark frequency module.+ 24V power supplys deliver to electromagnetic interface filter Jing after DC-DC blood pressure lowering chips
(NFM41PC155B1E3), suppress high-frequency noise, then the high Ripple Suppression LDO chips (LT1764A) of Jing export low ripple
(10mVpp) power supply 5V voltage signals.DC-DC voltage stabilizing main purposes are selected to be to improve the work efficiency of veneer, LDO mainly considers height
PSRR (PSRR), can effectively reduce ripple and noise.
Input buffering, distribution are amplified and power supply of the output driving per stage circuit needs LC filter circuits, and this filtering can have
Effect prevents radiofrequency signal from carrying out crosstalk by power supply signal.
Shielding and filter design：
Whole module is combined with a metal lower shell and upper cover plate, reduces space radiation to greatest extent.Each road distribution is put
Shielded with structural member cavity between big circuit, contribute to Lu Yulu isolations and input and output reverse isolation degree.It is each for connecting
The motherboard of module is using four layers of printed board design, the wiring of holding wire internal layer, the wiring of ground wire top layer, the bag ground shielding processing of holding wire
Mode can be greatly reduced interference.
The rational deployment of component, power supply signal filtering are abundant, and radiofrequency signal adopts filter with low insertion loss, high rejects trap to protect
Card circuit indices.
The basic principles, principal features and advantages of the present invention have been shown and described above.One of ordinary skill in the art
It should be appreciated that the mode such as above-described embodiment protection domain that the invention is not limited in any way, all employing equivalents is obtained
The technical scheme for obtaining, falls within protection scope of the present invention.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (10)
1. a kind of high-performance isolation distributes multiplying arrangement, it is characterised in that：Including motherboard, and it is separately positioned on realization on motherboard
The power module of interconnection and interflow, mark frequency module, main control module, front panel and rear board, the rear board connect radio-frequency input signals,
Power splitter in Jing main control modules exports 4 road signals, and 4 road signals are respectively connected to mark frequency module, Jing input bufferings, amplify shaping,
Penetrate with exporting after driving to rear board, the front panel adopts matrix light emitting diode display mode as display module, each
Individual light emitting diode correspondence is corresponding to mark frequency input/output interface.
2. a kind of high-performance isolation according to claim 1 distributes multiplying arrangement, it is characterised in that：The motherboard adopts four
Layer printed board design, the wiring of holding wire internal layer, the wiring of ground wire top layer, while motherboard adopts passive connector distributed arrangement, it is female
Board to board connector, motherboard is adopted to adopt the straight spring hole scokets of J18, module to adopt the curved formula pin plugs of J18 between plate and each module.
3. a kind of high-performance isolation according to claim 1 distributes multiplying arrangement, it is characterised in that：The equipment plate
Radio-frequency input signals is connect, frequency 10MHz, -20～10dBm of amplitude, the power splitter in Jing main control modules export 4 road signals, 4 roads letter
Number be respectively connected to mark frequency module, Jing input buffering, amplify shaping, penetrate with driving after export to rear board, module output signal is common
6 tunnels are counted, is 2 road 10MHz signals respectively, 2 road 5MHz signals, 2 road 1MHz signals, amplitude output signal 13dBm ± 1dB.
4. a kind of high-performance isolation according to claim 3 distributes multiplying arrangement, it is characterised in that：
The allocative decision of the 10M signals：After atomic clock signal 10M Hz signal input buffers, Jing amplifies that to deliver to 74H,C14 six non-
Door Schmidt's reverser, after shaping Jing after 2N2222A isolation buffers Jing 10MHz low pass filters, after filtering higher hamonic wave, send
To single board radio connector；
The allocative decision of the 5M signals：After atomic clock signal 10M Hz signal input buffers, Jing amplifies and delivers to 7,4HC,390 ten and enter
Frequency divider two divided-frequency processed, export 5MHz square wave after Jing after 2N2222A isolation buffers Jing 5MHz low pass filters, filter high order
After harmonic wave, single board radio connector is delivered to；
The allocative decision of the 1M signals：After atomic clock signal 10M Hz signal input buffers, Jing amplifies and delivers to 7,4HC,390 ten and enter
Frequency divider processed ten is divided, export 1MHz square wave after Jing after 2N2222A isolation buffers Jing 1MHz low pass filters, filter high order
After harmonic wave, single board radio connector is delivered to.
5. a kind of high-performance isolation according to claim 4 distributes multiplying arrangement, it is characterised in that：Tri- poles of the 2N2222
Pipe is buffered-display driver pipe, selects Motorola low noise amplification pipes, and radiates using metal TO18 encapsulation；Wave filter adopts undershoot
Enter loss, high out-of-side rejection mode filter filters high-frequency harmonic and high-end noise signal.
6. a kind of high-performance isolation according to claim 1 distributes multiplying arrangement, it is characterised in that：The radio frequency input letter
Number using AD8307AR logarithmics amplifier detect input signal, during input signal >=-20dBm, OUT (pin4) output voltage
1.2V, send comparator, comparison voltage low level to represent normal, otherwise extremely Jing after capacitor filtering.
7. a kind of high-performance isolation according to claim 1 distributes multiplying arrangement, it is characterised in that：Output signal is using again
Pressure diode detection mode, output signal Jing weak coupling mode are connected to diode, and signal rectification post filtering delivers to comparator, than
Represent normal compared with voltage low level, otherwise extremely.
8. a kind of high-performance isolation according to claim 1 distributes multiplying arrangement, it is characterised in that：The power module is adopted
Powered with civil power and DC source two ways；When civil power and DC source are powered simultaneously, civil power is preferentially powered, and works as mains failure
When, automatically switch to DC source and power, when city power recovery powers, connect city's electric pathway again, it is ensured that uninterrupted power supply.
9. a kind of high-performance isolation according to claim 8 distributes multiplying arrangement, it is characterised in that：The power module bag
Relay K1, relay K2, front panel switch S1, transformator T1 are included, the relay K1 inputs connect 24V DC sources,
The secondary side winding of relay K2 input connection transformer T1, the primary side winding connection 220V civil powers of transformator T1, relay K1
Normally opened contact connect relay K2 back contact；Front panel switch S1 is first turned on, S1 is closed, if AC and DC is all powered,
K1, K2 all adhesives, the dynamic circuit connector of K1, K2 connect and electrically connect, and direct current 24V is hanging Jing after K1 normally opened contacts are sent to the back contact of K2, no
Energy power supply to the device, and the normally opened contact of alternating voltage Jing T1 and K2 send bridge heap VD3, output+24V；When AC dump, K2 because
Unpowered voltage and quit work, K2 back contacts connect, K1 still adhesives, now the path of+24V be K1 normally opened contacts, K2
Back contact, VD3, when restoring electricity, K2 switches to normally opened contact again for exchange, and equipment recovers alternate current operation.
10. a kind of high-performance isolation according to claim 8 distributes multiplying arrangement, it is characterised in that：The mark frequency module
Power supply adopt secondary isolation mode, power module output+24V power supplys, deliver to electromagnetic interface filter Jing after DC-DC blood pressure lowering chips, press down
High-frequency noise processed, then the high Ripple Suppression LDO chips of Jing export low ripple power supply 5V voltage signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610945171.0A CN106533403A (en) | 2016-10-26 | 2016-10-26 | High-performance isolation, distribution and amplification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610945171.0A CN106533403A (en) | 2016-10-26 | 2016-10-26 | High-performance isolation, distribution and amplification equipment |
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| Publication Number | Publication Date |
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| CN106533403A true CN106533403A (en) | 2017-03-22 |
Family
ID=58292355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610945171.0A Pending CN106533403A (en) | 2016-10-26 | 2016-10-26 | High-performance isolation, distribution and amplification equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113949457A (en) * | 2021-09-23 | 2022-01-18 | 中航光电科技股份有限公司 | Miniaturized multichannel high-isolation radio frequency optical transmission system |
| CN116667796A (en) * | 2023-07-28 | 2023-08-29 | 成都世源频控技术股份有限公司 | Power division amplifying circuit and method for improving anti-interference of reference clock signal |
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| CN116667796A (en) * | 2023-07-28 | 2023-08-29 | 成都世源频控技术股份有限公司 | Power division amplifying circuit and method for improving anti-interference of reference clock signal |
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Application publication date: 20170322 |