CN108494500A - One kind being based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits - Google Patents
One kind being based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits Download PDFInfo
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- CN108494500A CN108494500A CN201810166754.2A CN201810166754A CN108494500A CN 108494500 A CN108494500 A CN 108494500A CN 201810166754 A CN201810166754 A CN 201810166754A CN 108494500 A CN108494500 A CN 108494500A
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 70
- 230000003287 optical effect Effects 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 28
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 9
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 101100495835 Oryza sativa subsp. japonica Cht1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/042—Special circuits, e.g. comparators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
Abstract
The invention discloses one kind being based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits.Advantages of the present invention：Power module is powered to transceiver and SEP optical modules, SEP optical modules receive optical signal and are converted into electric signal output to stabilizing circuit, stabilizing circuit is output to transceiver after being filtered denoising to electric signal, improve the stability for the electric signal that transceiver receives, transceiver work is set more to stablize, extend the working efficiency for improving transceiver, extends the service life of transceiver.
Description
Technical field
It is more particularly to a kind of based on E1 interface 1+1 protection types PCM synthesis the present invention relates to field of signal transmissions
Multiplexer circuit.
Background technology
The 30 tunnel pulse-code modulation PCM abbreviation E1 in Europe, rate is 2.048Mbit/s.It is marked using the E1 in Europe in China
It is accurate.Its length of a time division multiple frame of E1 T=125us, that is, 125 microsecond of sampling period is divided into 32 equal time slots, time slot altogether
Number be CH-CH31.Wherein time slot CH0 as frame synchronization use, time slot CH16 be used for transmit signaling, be left CH1-CH15 and
Totally 30 time slots are used as 30 speech channels to CH17-CH31.Each time slot transmits 8bit, therefore public 256bit.Transmission 8000 per second
A frame, therefore the data transfer rate of PCM group E1 successively is exactly 2.048Mbit/s.
The defect that there are stability is low for the optical receiving circuit of existing PCM comprehensive multiplexings device circuit, anti-interference ability is weak.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide it is a kind of possess stability it is high light-receiving electricity
Road based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits.
To achieve the above object, the present invention provides following technical solutions：One kind is comprehensive based on E1 interface 1+1 protection types PCM
Multiplexer circuit is closed, includes：Power module, transceiver, stabilizing circuit and SEP optical modules, the power module respectively with receipts
Hair device is connected with SEP optical modules and is powered to transceiver and SEP optical modules, and the stabilizing circuit is connected on transceiver and SEP light
Between module, for being exported after converting optical signals into electric signal, the stabilizing circuit is used for SEP light the SEP optical modules
It is output to transceiver after the electric signal filtering and noise reduction of module output.
As a further improvement on the present invention, the transceiver includes transponder chip 2U2 and its peripheral circuit, described
SEP optical modules include receiver chip U1 and its peripheral circuit, and the stabilizing circuit includes resistance 2R5, resistance 2R6, electricity
Hinder 2R7, resistance 2R8, resistance 2R10, resistance 2R11, resistance 2R12, resistance 2R13, resistance 2R14, resistance 2R20, resistance 2R21,
Resistance 2R22, resistance 2R23, resistance 2R24, resistance 2R26, resistance 2R37, inductance 2L5, inductance 2L6, capacitance 2C5, capacitance 2C6,
Capacitance 2C15, capacitance 2C16, capacitance 2C19, capacitance 2C20, electrolytic capacitor 2EC2, electrolytic capacitor 2EC4, the receiver chip
U1 includes with GND feet, MOD_DEF0 feet, MOD_DEF1 feet, MOD_DEF2 feet, TX_FAULT feet, TX_DISABLE feet, TD+
Foot, TD- feet, VCCT feet, RATE_SEL feet, LOS feet, RD+ feet, RD- feet and VCCR feet, the GND feet ground connection, the MOD_
DEF0 feet, MOD_DEF1 feet, MOD_DEF2 feet and TX_FAULT feet are separately connected resistance 2R13, resistance 2R12, resistance 2R11, electricity
VCC3.3, the TX_DISABLE feet ground connection are connected after resistance 2R10, the TD+ feet are connected to transceiver core after connecting resistance 2R5
Electricity is connected after being connected to transponder chip 2U2, the TD+ feet connection capacitance 2C15 after piece 2U2, the TD- feet connection resistance 2R6
It is connected to transponder chip 2U2 after resistance 2R23, transceiver is connected to after connection resistance 2R24 after the TD- feet connection capacitance 2C16
Chip 2U2 is connected with the tie point coupling of resistance 2R22, the capacitance 2C15 and resistance 2R22 between the TD+ feet and TD- feet
It is followed by with resistance 2R7 short circuits after thering is the tie point of resistance 2R7, the capacitance 2C16 and resistance 2R22 to be coupled with resistance 2R8
The tie point of 3.3VAT1, the capacitance 2C15 and resistance 2R7 are connected with resistance 2R20, the company of the capacitance 2C16 and resistance 2R8
Contact is connected with after resistance 2R21 and is grounded after 2R20 short circuits, and the tie point of the capacitance 2C15 and resistance 2R23 is connected with resistance
The tie point of capacitance 2C16 and resistance 2R24 are connected to after 2R26, the VCCT feet are connected with inductance 2L5 and are followed by VCC3.3, described
VCCT feet are grounded after being connected with electrolytic capacitor 2EC2 parallel with one another and capacitance 2C6, the tie point of the inductance 2L5 and VCC3.3
It is grounded after being connected with capacitance 2C5, the RATE_SEL feet connection resistance 2R37 is followed by VCC3.3, and the LOS feet connect resistance
2R14 is followed by VCC3.3, and the RD+ feet and RD- feet are connected to chip 2U2, and the VCCR feet are connected with inductance 2L6 and are followed by
VCC3.3, the VCCR feet are grounded after being connected with electrolytic capacitor 2EC4 parallel with one another and capacitance 2C20, the inductance 2L6 with
It is grounded after being connected with capacitance 2C19 between VCC3.3.
As a further improvement on the present invention, the power module includes voltage stabilizing chip 6U1 and voltage stabilizing chip 6U2, institute
Stating voltage stabilizing chip 6U1, there is Vin feet, Vout feet and ADJ feet, the voltage stabilizing chip 6U2 to have Vin feet, GND feet, EN feet, BYP
Foot and Vout feet, the Vin feet of the voltage stabilizing chip 6U1 are grounded after being connected with capacitance 6C2 parallel with one another and electrolytic capacitor 6EC2,
The Vin feet of the voltage stabilizing chip 6U1 meet VCC5V, and the ADJ feet of the voltage stabilizing chip 6U1 are grounded, the voltage stabilizing chip 6U1's
Vout feet are grounded after being connected with electrolytic capacitor 6EC5 parallel with one another and capacitance 6C1, the Vout feet output of the voltage stabilizing chip 6U1
The Vin feet and EN feet of VCC3.3, the voltage stabilizing chip 6U2 meet VCC3.3, and the Vin feet of the voltage stabilizing chip 6U2 are connected with mutually
It is grounded after capacitance 6C9 and electrolytic capacitor 6EC3 in parallel, the GND feet ground connection of the voltage stabilizing chip 6U2, the voltage stabilizing chip 6U2
Vout feet be connected with capacitance 6C11 parallel with one another and electrolytic capacitor 6EC4 after be grounded, the Vout feet of the voltage stabilizing chip 6U2
The BYP feet of output 2.5V, the voltage stabilizing chip 6U2 are grounded after being connected with capacitance 6C10.
As a further improvement on the present invention, the VCC5V is grounded after being connected with diode 6DV1.
As a further improvement on the present invention, further include having electrostatic protection module and Ethernet switching chip 4U2, it is described quiet
Electric protection module includes electrostatic protection chip 4U3, the electrostatic protection chip 4U3 be connected to Ethernet switching chip 4U2 with
Between power module.
As a further improvement on the present invention, further include having indicating lamp module, the indicating lamp module includes three groups of rows
Type light emitting diode, short circuit is followed by VCC3.3, row's type after row's type light emitting diode anode is separately connected divider resistance
Main control chip is connected after light emitting diode cathode connection driving chip 3U4 and driving chip 3U5.
As a further improvement on the present invention, the main control chip is connected with toggle switch after being connected with driving chip 9U1.
Beneficial effects of the present invention, power module are powered to transceiver and SEP optical modules, and SEP optical modules receive optical signal
And electric signal output is converted into stabilizing circuit, stabilizing circuit is filtered after denoising electric signal and is output to transceiver, improves
The stability for the electric signal that transceiver receives makes transceiver work more stablize, extends the working efficiency for improving transceiver, extends
The service life of transceiver.
Description of the drawings
Fig. 1 is the flow diagram of the present invention；
Fig. 2 is the circuit diagram of transponder chip 2U2；
Fig. 3 is the circuit diagram of optical receiving circuit in Fig. 1；
Fig. 4 is the circuit diagram of regulator circuit in Fig. 1；
Fig. 5 is the circuit diagram of electrostatic discharge protective circuit；
Fig. 6 is the circuit diagram of Ethernet switching chip 4U2；
Fig. 7 is the circuit diagram of three groups of row's type light emitting diodes；
Fig. 8 is the circuit diagram of driving chip 3U4 and driving chip 3U5；
Fig. 9 is the circuit diagram of driving chip 9U1 and toggle switch；
Figure 10 is the circuit diagram of main control chip.
Specific implementation mode
The present invention is described in further detail below in conjunction with the embodiment given by attached drawing.
Referring to Fig.1, shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, one kind of the present embodiment is based on E1 interfaces
1+1 protection type PCM comprehensive multiplexing device circuits include：Power module 1, transceiver 2, stabilizing circuit 3 and SEP optical modules 4, institute
It states power module 4 to connect with transceiver 2 and SEP optical modules 4 and power to transceiver 2 and SEP optical modules 4 respectively, the stabilization
Circuit 3 is connected between transceiver 2 and SEP optical modules 4, and the SEP optical modules 4 are defeated after electric signal for converting optical signals into
Go out, the stabilizing circuit 3 is used to that transceiver 2 will to be output to after electric signal filtering and noise reduction that SEP optical modules 4 export.
Through the above technical solutions, power module 1 is powered to transceiver 2 and SEP optical modules 4, SEP optical modules 4 receive light
Signal is simultaneously converted into electric signal output to stabilizing circuit 3, and stabilizing circuit 3 is output to transceiver after being filtered denoising to electric signal
2, the stability for the electric signal that transceiver 2 receives is improved, so that the work of transceiver 2 is more stablized, extends the work for improving transceiver 2
Efficiency extends the service life of transceiver 2.
As a kind of improved specific implementation mode, the transceiver 2 includes transponder chip 2U2 and its periphery electricity
Road, the SEP optical modules 4 include receiver chip U1 and its peripheral circuit, and the stabilizing circuit 3 includes resistance 2R5, electricity
Hinder 2R6, resistance 2R7, resistance 2R8, resistance 2R10, resistance 2R11, resistance 2R12, resistance 2R13, resistance 2R14, resistance 2R20,
Resistance 2R21, resistance 2R22, resistance 2R23, resistance 2R24, resistance 2R26, resistance 2R37, inductance 2L5, inductance 2L6, capacitance
2C5, capacitance 2C6, capacitance 2C15, capacitance 2C16, capacitance 2C19, capacitance 2C20, electrolytic capacitor 2EC2, electrolytic capacitor 2EC4, institute
It includes with GND feet, MOD_DEF0 feet, MOD_DEF1 feet, MOD_DEF2 feet, TX_FAULT feet, TX_ to state receiver chip U1
DISABLE feet, TD+ feet, TD- feet, VCCT feet, RATE_SEL feet, LOS feet, RD+ feet, RD- feet and VCCR feet, the GND feet connect
Ground, the MOD_DEF0 feet, MOD_DEF1 feet, MOD_DEF2 feet and TX_FAULT feet be separately connected resistance 2R13, resistance 2R12,
VCC3.3, the TX_DISABLE feet ground connection are connected after resistance 2R11, resistance 2R10, the TD+ feet connect after connecting resistance 2R5
To transponder chip 2U2, it is connected to transponder chip 2U2 after the TD- feet connection resistance 2R6, the TD+ feet connect capacitance
It is connected after 2C15 after being connected to transponder chip 2U2, the TD- feet connection capacitance 2C16 after resistance 2R23 after connection resistance 2R24
It is connected to transponder chip 2U2, resistance 2R22, the capacitance 2C15 and resistance 2R22 are connected between the TD+ feet and TD- feet
Tie point be coupled with the tie point of resistance 2R7, the capacitance 2C16 and resistance 2R22 and be coupled with after resistance 2R8 and resistance 2R7
The tie point that short circuit is followed by 3.3VAT1, the capacitance 2C15 and resistance 2R7 is connected with resistance 2R20, the capacitance 2C16 and electricity
The tie point of resistance 2R8 is connected with after resistance 2R21 and is grounded after 2R20 short circuits, the tie point of the capacitance 2C15 and resistance 2R23
It is connected with the tie point that capacitance 2C16 and resistance 2R24 are connected to after resistance 2R26, the VCCT feet are connected with inductance 2L5 and are followed by
VCC3.3, the VCCT feet are grounded after being connected with electrolytic capacitor 2EC2 parallel with one another and capacitance 2C6, the inductance 2L5 with
The tie point of VCC3.3 is grounded after being connected with capacitance 2C5, and the RATE_SEL feet connection resistance 2R37 is followed by VCC3.3, described
LOS feet connection resistance 2R14 is followed by VCC3.3, and the RD+ feet and RD- feet are connected to chip 2U2, and the VCCR feet are connected with
Inductance 2L6 is followed by VCC3.3, and the VCCR feet are grounded after being connected with electrolytic capacitor 2EC4 parallel with one another and capacitance 2C20, described
It is grounded after being connected with capacitance 2C19 between inductance 2L6 and VCC3.3.
Through the above technical solutions, resistance 2R11 forms RC low-pass filter circuits with distribution capacity, data letter is effectively filtered out
High-frequency harmonic in number；Resistance 2R12 forms RC low-pass filter circuits with distribution capacity, effectively filters out the high frequency in clock signal
Harmonic wave, setting resistance 2R10 and 2R13 limit the electric current between transponder chip 2U2 and receiver chip U1, improve the steady of circuit
It is qualitative.Setting inductance 2L5, capacitance 2C5, capacitance 2C6 and electrolytic capacitor 2EC2, which are filtered, realizes power supply VCC3.3 and receiver
Chip U1 sends the decoupling between pin, improves circuit stability.Inductance 2L6, capacitance 2C19, capacitance 2C20 and electrolysis electricity are set
Hold 2EC4 and be filtered the decoupling realized between power supply VCC3.3 and receiver chip U1 reception pins, improves circuit stability.
Resistance 2R5,2R6,2R37 and 2R14 are set and carry out current limliting, avoids receiver chip U1 by impulse circuit impact failure, extension connects
Receive the service life of device chip U1.TD+ and TD- is that signal sends pin, setting capacitance 2C15, capacitance 2C16, resistance 2R23 and
Resistance 2R24 carries out current limliting and filtering further increases the stabilization that receiver chip U1 is sent to transponder chip 2U2 electric signals
Property, setting resistance 2R26, resistance 2R22, resistance 2R7, resistance 2R8, resistance 2R20 and resistance 2R21 carry out current limliting, improve circuit
Stability and anti-interference ability.
As a kind of improved specific implementation mode, the power module 4 includes voltage stabilizing chip 6U1 and voltage stabilizing chip
There is Vin feet, Vout feet and ADJ feet, the voltage stabilizing chip 6U2 to have Vin feet, GND feet, EN by 6U2, the voltage stabilizing chip 6U1
The Vin feet of foot, BYP feet and Vout feet, the voltage stabilizing chip 6U1 are connected with capacitance 6C2 parallel with one another and electrolytic capacitor 6EC2
After be grounded, the Vin feet of the voltage stabilizing chip 6U1 connect VCC5V, the ADJ feet ground connection of the voltage stabilizing chip 6U1, the voltage stabilizing chip
The Vout feet of 6U1 are grounded after being connected with electrolytic capacitor 6EC5 parallel with one another and capacitance 6C1, the Vout of the voltage stabilizing chip 6U1
Foot exports VCC3.3, and the Vin feet and EN feet of the voltage stabilizing chip 6U2 connect VCC3.3, the Vin feet connection of the voltage stabilizing chip 6U2
It is grounded after having capacitance 6C9 parallel with one another and electrolytic capacitor 6EC3, the GND feet ground connection of the voltage stabilizing chip 6U2, the voltage stabilizing core
The Vout feet of piece 6U2 are grounded after being connected with capacitance 6C11 parallel with one another and electrolytic capacitor 6EC4, the voltage stabilizing chip 6U2's
The BYP feet of the output of Vout feet 2.5V, the voltage stabilizing chip 6U2 are grounded after being connected with capacitance 6C10.
Through the above technical solutions, exporting 3.3V, the control source 6U2 of 3.3V after the control source voltage stabilizing chip 6U1 of 5V
After export 2.5V, electrolytic capacitor 6EC2 parallel with one another and capacitance 6C2 is set between VCC5V and the Vin feet of voltage stabilizing chip 6U1
Ground connection improves the stability of input voltage afterwards, extends the service life of voltage stabilizing chip 6U1, connects in the Vout feet of voltage stabilizing chip 6U1
It is grounded after being connected to electrolytic capacitor 6EC5 parallel with one another and capacitance 6C1, the voltage of output is filtered, output voltage is improved
Stability protects late-class circuit, after the Vin feet of voltage stabilizing chip 6U2 connect electrolytic capacitor 6EC3 parallel with one another and capacitance 6C9
Ground connection, the voltage to inputting voltage stabilizing chip 6U2 are filtered, and improve the stability of input, and extend voltage stabilizing chip 6U2 uses the longevity
Life, is grounded after the Vout feet of voltage stabilizing chip 6U2 connect capacitance 6C11 parallel with one another and electrolytic capacitor 6EC4, filters out output electricity
Burr in pressure further increases the stability of output, protects late-class circuit.
As a kind of improved specific implementation mode, the VCC5V is grounded after being connected with diode 6DV1.
Through the above technical solutions, the diode 6DV1 is Transient Suppression Diode, can be SMBJ6.5A, when two poles
When the two poles of the earth of pipe 6DV1 receive reversed transient state high energy impact events, it is with the speed of 10 minus 12 power second-time by the height of two interpolars
Impedance becomes Low ESR, absorbs up to tens million of surge powers, makes the voltage clamping of two interpolars in a predetermined value, after protection
Precision components in continuous electronic circuit, from the damage of various surge pulses.
Further include having electrostatic protection module 5 and Ethernet switching chip 4U2 as a kind of improved specific implementation mode,
The electrostatic protection module 5 includes electrostatic protection chip 4U3, and the electrostatic protection chip 4U3 is connected to Ethernet exchanging core
Between piece 4U2 and power module 1.
Through the above technical solutions, when the momentary voltage pulse that power module 1 occurs, electrostatic protection chip is first passed through
Ethernet switching chip 4U2 is arrived after 4U3 again, avoid momentary voltage pulse damage Ethernet switching chip 4U2, further increase with
The too stability of net exchange chip 4U2 extends the service life of Ethernet switching chip 4U2, improves user experience.
Further include having indicating lamp module 8, the indicating lamp module 8 includes as a kind of improved specific implementation mode
Three groups of row's type light emitting diodes, short circuit is followed by VCC3.3 after row's type light emitting diode anode is separately connected divider resistance, institute
Main control chip 1 is connected after the row of stating type light emitting diode cathode connection driving chip 3U4 and driving chip 3U5.
Through the above technical solutions, three groups of row's type light emitting diodes of setting, and three groups of row's type light emitting diodes have red
And green, it indicates the working condition of entire circuit, observes and overhaul convenient for user, row's type light emitting diode is multiple compared to installing
Diode is more convenient, and more succinct, with shell matching degree higher, shell more easy to install.By add driving chip 3U4 and
As the connection between three groups of row's type light emitting diodes and main control chip 1, reduce the pin of main control chip 1 makes driving chip 3U5
With quantity, it is more easy to extend new function.
As a kind of improved specific implementation mode, the main control chip 1 is connected with dial-up after being connected with driving chip 9U1
Switch 9.
Through the above technical solutions, setting toggle switch 9, input signal is to main control chip 1, toggle switch 8 when stirring
Position, can input 256 kinds of different instructions and be controlled and adjusted to main control chip 1, meet the need of most instruction numbers
It asks, toggle switch 9 is small, and stability is strong, and service life is long.And toggle switch 9 is easy for installation, and installation effectiveness is high.Pass through
Driving chip 9U1 is added as the connection between toggle switch 9 and main control chip 1, the pin for reducing main control chip 1 uses number
Amount, is more easy to extend new function.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (7)
1. one kind being based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits, which is characterized in that include：Power module (1),
Transceiver (2), stabilizing circuit (3) and SEP optical modules (4), the power module (4) respectively with transceiver (2) and SEP optical modules
(4) it connects and powers to transceiver (2) and SEP optical modules (4), the stabilizing circuit (3) is connected on transceiver (2) and SEP light
Between module (4), the SEP optical modules (4) for being exported after converting optical signals into electric signal, use by the stabilizing circuit (3)
Transceiver (2) is output to after the electric signal filtering and noise reduction for exporting SEP optical modules (4).
2. according to claim 1 be based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits, it is characterised in that：It is described
Transceiver (2) includes transponder chip 2U2 and its peripheral circuit, the SEP optical modules (4) include receiver chip U1 and
Its peripheral circuit, the stabilizing circuit (3) include resistance 2R5, resistance 2R6, resistance 2R7, resistance 2R8, resistance 2R10, resistance
2R11, resistance 2R12, resistance 2R13, resistance 2R14, resistance 2R20, resistance 2R21, resistance 2R22, resistance 2R23, resistance 2R24,
Resistance 2R26, resistance 2R37, inductance 2L5, inductance 2L6, capacitance 2C5, capacitance 2C6, capacitance 2C15, capacitance 2C16, capacitance 2C19,
Capacitance 2C20, electrolytic capacitor 2EC2, electrolytic capacitor 2EC4, the receiver chip U1 include with GND feet, MOD_DEF0 feet,
MOD_DEF1 feet, MOD_DEF2 feet, TX_FAULT feet, TX_DISABLE feet, TD+ feet, TD- feet, VCCT feet, RATE_SEL feet,
LOS feet, RD+ feet, RD- feet and VCCR feet, the GND feet ground connection, the MOD_DEF0 feet, MOD_DEF1 feet, MOD_DEF2 feet
It is separately connected after resistance 2R13, resistance 2R12, resistance 2R11, resistance 2R10 with TX_FAULT feet and connects VCC3.3, the TX_
DISABLE feet are grounded, and transponder chip 2U2, the TD- feet connection resistance 2R6 are connected to after the TD+ feet connection resistance 2R5
After be connected to transponder chip 2U2, be connected to transponder chip after connection resistance 2R23 after the TD+ feet connection capacitance 2C15
After 2U2, the TD- feet connection capacitance 2C16 transponder chip 2U2, the TD+ feet and TD- feet are connected to after connection resistance 2R24
Between be connected with resistance 2R22, the capacitance 2C15 and resistance 2R22 tie point be coupled with resistance 2R7, the capacitance 2C16 with
The tie point of resistance 2R22 is coupled with after resistance 2R8 and is followed by 3.3VAT1, the capacitance 2C15 and resistance 2R7 with resistance 2R7 short circuits
Tie point be connected with resistance 2R20, the capacitance 2C16 and resistance 2R8 tie point be connected with it is short with 2R20 after resistance 2R21
It is grounded after connecing, the tie point of the capacitance 2C15 and resistance 2R23 is connected to capacitance 2C16 and resistance after being connected with resistance 2R26
The tie point of 2R24, the VCCT feet are connected with inductance 2L5 and are followed by VCC3.3, and the VCCT feet are connected with electrolysis parallel with one another
It is grounded after capacitance 2EC2 and capacitance 2C6, the tie point of the inductance 2L5 and VCC3.3 is grounded after being connected with capacitance 2C5, described
RATE_SEL feet connection resistance 2R37 is followed by VCC3.3, and the LOS feet connection resistance 2R14 is followed by VCC3.3, the RD+ feet and
RD- feet are connected to chip 2U2, and the VCCR feet are connected with inductance 2L6 and are followed by VCC3.3, and the VCCR feet are connected with mutually simultaneously
It is grounded after the electrolytic capacitor 2EC4 and capacitance 2C20 of connection, is grounded after being connected with capacitance 2C19 between the inductance 2L6 and VCC3.3.
3. according to claim 2 be based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits, it is characterised in that：It is described
Power module (4) includes voltage stabilizing chip 6U1 and voltage stabilizing chip 6U2, the voltage stabilizing chip 6U1 have Vin feet, Vout feet and
ADJ feet, the voltage stabilizing chip 6U2 have Vin feet, GND feet, EN feet, BYP feet and Vout feet, the Vin of the voltage stabilizing chip 6U1
Foot is grounded after being connected with capacitance 6C2 parallel with one another and electrolytic capacitor 6EC2, and the Vin feet of the voltage stabilizing chip 6U1 meet VCC5V,
The ADJ feet of the voltage stabilizing chip 6U1 are grounded, and the Vout feet of the voltage stabilizing chip 6U1 are connected with electrolytic capacitor parallel with one another
It is grounded after 6EC5 and capacitance 6C1, the Vout feet of the voltage stabilizing chip 6U1 export VCC3.3, the Vin feet of the voltage stabilizing chip 6U2
VCC3.3 is met with EN feet, after the Vin feet of the voltage stabilizing chip 6U2 are connected with capacitance 6C9 parallel with one another and electrolytic capacitor 6EC3
Ground connection, the GND feet ground connection of the voltage stabilizing chip 6U2, the Vout feet of the voltage stabilizing chip 6U2 are connected with capacitance parallel with one another
It is grounded after 6C11 and electrolytic capacitor 6EC4, the Vout feet of the voltage stabilizing chip 6U2 export 2.5V, the BYP of the voltage stabilizing chip 6U2
Foot is grounded after being connected with capacitance 6C10.
4. according to claim 3 be based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits, it is characterised in that：It is described
VCC5V is grounded after being connected with diode 6DV1.
5. according to claim 4 be based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits, it is characterised in that：Also wrap
Electrostatic protection module (5) and Ethernet switching chip 4U2 are included, the electrostatic protection module (5) includes electrostatic protection chip
4U3, the electrostatic protection chip 4U3 are connected between Ethernet switching chip 4U2 and power module (1).
6. according to claim 5 be based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits, it is characterised in that：Also wrap
Indicating lamp module (8) is included, the indicating lamp module (8) includes three groups of row's type light emitting diodes, row's type light-emitting diodes
Short circuit is followed by VCC3.3, row's type light emitting diode cathode connection driving chip 3U4 after pipe anode is separately connected divider resistance
With connection main control chip (1) after driving chip 3U5.
7. according to claim 6 be based on E1 interface 1+1 protection type PCM comprehensive multiplexing device circuits, it is characterised in that：It is described
Main control chip (1) is connected with toggle switch (9) after being connected with driving chip 9U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108494500B (en) | 2021-01-08 |
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