CN101483384A - Electric power processing circuit module, subscriber circuit system and voice control method - Google Patents
Electric power processing circuit module, subscriber circuit system and voice control method Download PDFInfo
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- CN101483384A CN101483384A CNA2009100774764A CN200910077476A CN101483384A CN 101483384 A CN101483384 A CN 101483384A CN A2009100774764 A CNA2009100774764 A CN A2009100774764A CN 200910077476 A CN200910077476 A CN 200910077476A CN 101483384 A CN101483384 A CN 101483384A
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Abstract
The present invention discloses an electric power processing circuit module, which comprises a main loop submodule and a control circuit submodule, which can purify rectify and decompress the input voltage, control and regulate voltage to supply load. The present invention also provides a subscriber circuit system including a central processing module, a speech control module, a code and decode module, a intelligent subscriber line interface circuit module and a electric power circuit module, wherein the electric power circuit module comprises the electrical source processing circuit module and converts power input in wide region through the electrical source processing circuit module into pressure of normal work in subscriber circuit system. The present invention is provided with high density of integration of subscriber circuit system, big capacity, wide use range, and is provided with detection function. The present invention also provides a speech control method, which downloads version to be performed and firmware program that controlled by speech through central processing module, the speech control module completes operations like call control and monitor to subscriber circuit, and can report operation result.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of power supply processing circuit module, subscriber line circuit system and sound control method.
Background technology
The main task of telephone exchange is continuing of conversing between the realization user, and stored-program control exchange comes down to adopt computer to carry out the switch of " stored program control ".In stored-program control exchange and access net system equipment, functions such as user's dislodging machine testing, conversation, caller identification all need can realize promptly usually said user's veneer by certain subscriber line circuit.Subscriber line circuit can realize being connected between various subscribers feeders and the telephone exchange; wherein; the encoding and decoding speech that subscriber line circuit adopted (CODEC) chip; finish 7 basic functions of analog line circuit with Subscriber Line Interface Circuit (SLIC); that is: feed (Batterry) function; overvoltage protection (Over Voltage Protection) function; ring (Ringing) function; monitor (Supervision) function; encoding and decoding (Codec) function; two/four lines mix conversion (Hybrid) function; test (Test) function, these 7 basic functions are used abbreviation (BORSCHT) representative of their first letter composition always.
Yet, early stage subscriber line circuit is subjected to the restriction of aspects such as user circuit suite slice integrated level and production technology, thereby cause on certain user's veneer area, can only realizing that 16 road or 32 tunnel subscriber line circuit designs, and then the integrated level that causes whole telecommunication network system is lower, equipment occupation space is bigger, even a series of problems such as can not meet consumers' demand.For example: some outdoor use household units, special, and high especially to the requirement of overall dimensions of design because of its installation site, but the integrated level of existing telecommunication network system does not reach such requirement yet.
At present, for satisfying the different telecommunications service demand of user, significantly increase though telecommunication network system is existing on scale and complexity, this just need position the various faults that occur in user's use and judge, and in time handles according to detected failure condition.Yet, in present access net system, existing subscriber line circuit does not also possess this respect function, need realize by means of the test circuit of external dedicated, so just increased the complexity and the cost of circuit design extraly, and therefore corresponding failure rate can increase also., to telecommunication network system, can in time locate and detect out of order reason, and the harm that fault is brought and influence dropping to minimumly, is crucial.
In addition, because existing design system is primarily aimed at specific environment for use and comes design circuit, cause the scope of application of circuit narrower, particularly make subscriber line circuit the scope of the power input voltage that can bear less, common operating voltage range-46V～-57V, can't be used in the higher occasion of some input voltage, therefore limit applying of Telecommunication network equipment.Yet, along with the continuous development and the growth of user market, the range of application of the circuit that will extend one's service, the normal condition of work of subscriber line circuit that improves.But existing subscriber line circuit can't satisfy such requirement.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of power supply processing circuit module, a kind of integrated level height that enlarges input voltage range, capacity is big, the scope of application is wide and have the subscriber line circuit system of measuring ability, and a kind of sound control method.
For achieving the above object, the invention discloses a kind of power supply processing circuit module, comprising: the major loop submodule, be used for to input voltage purify, rectification and step-down handle; The control circuit submodule is used to control and adjust the voltage of handling through the major loop submodule, with the voltage output supply load that obtains.
In the such scheme, described control circuit submodule comprises: the Voltage loop feedback unit, adopt the PNP triode that is operated in the linear amplification zone to realize the Voltage loop feedback; The pulse width modulation controlled unit is used for control output voltage, and the mode of employing proportional integral realizes the dicyclo pulse width modulation controlled of outer voltage current inner loop; Parameter set unit, the emitter resistance by setting described PNP triode and the ratio of collector resistance are adjusted the operation interval of power supply processing circuit module.Periphery, described pulse width modulation controlled unit is located in the soft starting circuit unit, the moment overvoltage that last surge when preventing to start and hot plug produce.
The present invention also discloses a kind of subscriber line circuit system, comprising: central processing module, carry out master control, management, maintenance and download firmware and program to the subscriber line circuit system; By speech control module the intrasystem circuit of subscriber line circuit is managed and dispatches; Speech control module is used for communicating by letter with central processing module, downloads voice control firmware program, control coding/decoding module, to realize subscriber line circuit function, test function; Coding/decoding module carries out analog/digital conversion, digital-to-analog conversion, filtering, two/four line conversion to audio signal; Afterwards, notify intelligent subscriber line interface circuit module; Intelligent subscriber line interface circuit module, feed function, over-voltage protecting function, ringer function, function for monitoring, codec functions, two/four lines of finishing subscriber line circuit with coding/decoding module jointly mix translation function and test function; The power circuit module is used for providing power supply to the subscriber line circuit system, and handles power supply.
Wherein, described power circuit module comprises the power supply processing circuit submodule, and this power supply processing circuit submodule further comprises: main loop unit, be used for to input voltage purify, rectification and step-down handle; Control circuit unit is used to control and adjust the voltage of handling through main loop unit, with the voltage output supply load that obtains.Described control circuit unit comprises: Voltage loop feedback subelement, adopt the PNP triode that is operated in the linear amplification zone to realize the Voltage loop feedback; The pulse width modulation controlled subelement is used for control output voltage, and the mode of employing proportional integral realizes the dicyclo pulse width modulation controlled of outer voltage current inner loop; Parameter is provided with subelement, and the emitter resistance by setting described PNP triode and the ratio of collector resistance are adjusted the operation interval of power supply processing circuit submodule.
In the such scheme, described speech control module adopts the 8M clock, by downloading voice-operated firmware program with communicating by letter of CPU module, reporting test result.Described coding/decoding module adopts 16 four-way intelligent subscriber line speech processing circuit chips.Described intelligent subscriber line interface circuit module adopts 32 binary channels intelligent subscriber line interface circuit chips, and and subscribers feeder between be provided with protective circuit, to prevent to damage inner coding/decoding module and intelligent subscriber line interface circuit module.
The invention provides a kind of voice control method, comprising: the subscriber line circuit system powers on, and the guiding central processing module is realized initialization; Central processing module is downloaded version and the voice-operated firmware program that will carry out; To the speech control module channeling conduct, this speech control module is finished the calling control of subscriber line circuit or monitoring or circuit self-test operation, and with operation result uploading.
As can be seen from the above technical solutions, power supply processing circuit module of the present invention is by adopting pulse-width modulation (PWM, Pulse Width Modulation) technology and current/voltage coupling technique, realize wide region power supply input conversion, enlarge the input range of supply voltage, guaranteed different electrical power input condition circuit operate as normal; And, have functions such as moment overvoltage that the surge of preventing, hot plug produce and voltage stabilizing.Traditional power module adopts the mode of linear photoconductor coupling apparatus and voltage comparator mostly, and the present invention adopts a kind of very simple mode, realize the Voltage loop feedback by a PNP triode that is operated in the linear amplification zone, not only circuit is simple but also solved the different problem of voltage sample reference point.The PWM control unit of power supply processing circuit module is coupled to resistance of the sampled signal of electric current serial connection and the electric capacity mode with proportional integral on the Voltage loop, form the dicyclo PWM control unit of an outer voltage current inner loop, improve the stability of power supply output, and improved the load capacity of power circuit.As seen, this power supply processing circuit has advantages such as circuit structure is simple, with low cost, area occupied is little, carrying load ability is strong, output voltage ripple is stable.
Adopt the subscriber line circuit system of above-mentioned power supply processing circuit module, can in the supply voltage input range of broad, work, can increase unit are user interface capacity, save equipment cost, improve the utilance of circuit and system, increase the equipment scope of application, strengthen product competitiveness.
Specifically, described subscriber line circuit system can realize Based Intelligent Control, its intellectuality is embodied in whole user's veneer and controls (VCP) module by programmable voice and realize all subscriber line circuit function and test functions by control intelligent subscriber line interface circuit (ISLIC) module and intelligent subscriber line speech processing circuit (ISLAC) module, has greatly improved the integrated level of subscriber line circuit system.Ringing-current and duplicate supply feed in this ISLIC module is supported; by the above-mentioned power supply processing circuit module line interface input voltage range that extends one's service; the feed scope of ISLIC module is reached+68V～-70V; can be used in far, user closely; and this ISLIC module periphery is provided with protective circuit, and subscriber line circuit is carried out overvoltage protection.Coding/decoding module adopts the ISLAC module, the DSP that includes is provided with parameter by computed in software and realizes different impedance parameter couplings and AC characteristic pointer, can innerly produce ringing-current, all AC characteristic parameter and DC characteristic parameter are able to programme fully, and have complete testing oneself and the line test ability.This shows that subscriber line circuit of the present invention system needn't just can position the various faults that occur in user's use and judge, and in time handle detected fault by means of the testing single-board of outside.
Wherein, described subscriber line circuit system height is integrated 16 ISLAC chips and 32 ISLIC chips have quantitatively increased at least one times, and user's way has been brought up to 64 the tunnel.The VCP module realizes up-downgoing millimicro (HW) line of 8M by 8M clock and 8K frame head, can provide maximum 128 time slots to satisfy the needs of 64 road subscriber's lines, and then realize control to ISLAC module and ISLIC module, wherein the more present 2M clock of 8M clock that adopted of VCP module is brought up to 4 times.In fact, for the subscriber line circuit of different ways, but its management circuit is essentially identical, therefore user's way is high more, cost per channel in the subscriber line circuit system is just low more, and the cost of adjusting whole telecommunication network system at last is also just low more, also just has competitiveness more.
In addition, described VCP module can and central authorities handle between (CPU) module and communicate, this CPU module can manage and dispatch whole subscriber's lines, and finishes and the communicating by letter of upper level control unit.
Description of drawings
Fig. 1 is the schematic diagram of power supply processing circuit module preferred embodiment of the present invention;
Fig. 2 is the structural representation of subscriber line circuit of the present invention system;
Fig. 3 is the schematic diagram of subscriber line circuit optimum system choosing embodiment of the present invention;
Fig. 4 is the workflow schematic diagram of VCP module of the present invention.
Embodiment
The invention provides a kind of power supply processing circuit module and a kind of subscriber line circuit system, core idea is: at first design a kind of power supply processing circuit module, to reach the purpose that extends one's service the line interface input voltage range, carries out voltage transitions and voltage stabilizing.Design a kind of subscriber line circuit system then, this subscriber line circuit system enlarges its working range by adopting described power supply processing circuit module, in this subscriber line circuit system, the VCP module communicates to finish download firmware, control subscriber line circuit, monitor user ' circuit and to report function such as test result by HBI interface and CPU module, and then realize all subscriber line circuit function and test functions, and this CPU module manages and dispatches whole subscriber's lines, and finishes and the communicating by letter of upper level control unit.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The situation of having relatively high expectations at some input voltage, the present invention proposes a kind of power supply processing circuit module of the interface input voltage range that is used to extend one's service, this power supply processing circuit module is by adopting the PWM control technology, with the input of the power supply of relative broad range be controlled at the subscriber line circuit system can the voltage range of operate as normal in, to enlarge the input range of supply voltage.Existing power module uses isolating transformer mostly, area occupied is big and cost is higher, and the power supply processing circuit module that the present invention proposes adopts a kind of mode of non-isolation, uses energy storage inductor to realize energy conversion, and circuit structure is simple, with low cost, area occupied is little.
This power supply processing circuit module mainly comprises major loop submodule and control circuit submodule, the major loop submodule to input voltage purify, processing such as rectification and step-down, the voltage that the control of control circuit submodule, adjustment are handled through the major loop submodule is with the voltage output supply load that obtains.
Described major loop submodule comprises Metal-oxide-semicondutor (MOS) pipe, energy storage inductor, fly-wheel diode and some filter capacitors etc., is a comparatively typical B UCK circuit.Described BUCK circuit is a kind of reduction voltage circuit, here, metal-oxide-semiconductor can be the N-channel MOS pipe, abbreviate the NMOS pipe as, the drain electrode of this NMOS pipe connects energy storage inductor, some filter capacitors and fly-wheel diode etc., grid connects described control circuit submodule, with control and regulate output voltage, and in time detects the operation conditions of load.When detecting the major loop overcurrent, turn-off metal-oxide-semiconductor with protective circuit.
Described control circuit submodule is a core with the PWM control unit, and this PWM control unit is adjusted output voltage to realize the conversion of wide region power supply input by adjusting duty ratio, and under the situation that guarantees the different electrical power input, subscriber's line can operate as normal.The electric current loop role is just turn-offed metal-oxide-semiconductor with protective circuit in the pwm chip in the past when detecting the major loop overcurrent, and output control is only fed back with the Voltage loop monocycle and realized.Here, the present invention introduces integral in the PWM control unit, and according to systematic error, proportion of utilization, integrating meter are calculated controlled quentity controlled variable systematic error is controlled, so that system does not have steady-state error after entering stable state, improves the load capacity of system.Specifically, this PWM control unit is coupled to resistance of the sampled signal of electric current serial connection and the electric capacity mode with proportional integral on the Voltage loop, form the dicyclo PWM control unit of an outer voltage current inner loop, with the stability of improving power supply output, the load capacity that improves power circuit.Wherein, described integral depends on the integration of time to the control of systematic error, and along with the increase of time, described integral also can increase thereupon.Like this, even if systematic error is very little, integral also can increase along with the increase of time, and then promotes the output increase of PWM control unit, further to reduce steady-state error, improves the load capacity of system.
Described control circuit submodule also comprises parameter set unit, and this parameter set unit is mainly adjusted the critical point voltage that open loop is switched to the closed loop state by the emitter resistance of setting PNP triode and the ratio of collector resistance.In parameter set unit, emitter resistance and collector resistance can be denoted as R respectively
eAnd R
c, according to output voltage V
Out, feedback voltage V
FB, collector current I
c, emitter current I
e, the relation between each physical quantity such as triode amplification coefficient B, collector current I during according to feedback equalization
cValue is calculated, and then passes through output voltage V
OutThe size of value obtains R
eWith R
cRatio.R
eWith R
cRatio more little, the critical point input voltage that open loop to closed loop state switches is low more; Otherwise open loop is high more to the critical point input voltage that the closed loop state switches.Specifically, when power circuit is in open loop situations, output voltage V
OutDepend on the maximum duty cycle d that power circuit can be realized, i.e. V
Out=V
In* d, V
InBe input voltage.And output voltage V
OutAlso there is such relationship expression: V
Out=I
b* R
b+ I
e* R
e+ V
EbSo, when ignoring base voltage I
b* R
bWith emitter base reversed bias voltage V
EbThe time, V then
Out=I
e* R
eAt this moment, if R
cConstant, R then
eWith R
cRatio more little be exactly R
eMore little; Again because I
c=I
e, if the I when reaching feedback equalization
cConstant then I
eAlso constant, output voltage V so
OutDiminish, and maximum duty cycle d is constant, then input voltage V
InAlso diminish.Therefore obtaining general account form is: when supposition reaches feedback equalization, and collector current I
cFor 1mA is constant, R then
cAlso constant, reduce R
eWith R
cRatio promptly reduce R
eValue, therefore cause V
OutReduce, then V
InAlso reduce, and this V
InIt is exactly the critical point input voltage value.
In communication equipment, often with the earth terminal of positive pole as entire equipment, with negative pole as input, so the power supply input mostly is negative voltage, but in order to describe the magnitude relationship of knowing voltage, negative voltage once need be described herein, because voltage is represented the electrical potential difference between the both positive and negative polarity, therefore the magnitude relationship of negative voltage has nothing to do with its " negative sign ", " negative sign " is not taken into account during comparative voltage numerical value big or small.The present invention can make power circuit be operated in two intervals by adjusting the parameter setting, promptly less than-57V with more than or equal to-57V.When input voltage during less than-57V, the Voltage loop feedback loop is invalid, and power circuit is operated in open loop situations, and the PWM control unit drives output with maximum duty cycle.When load current was 2A, output voltage only than the low 2V of input voltage or still less.When input voltage during greater than-57V, power circuit is operated in the closed loop feedback state, and output voltage is constant about-54V.The high energy of the input voltage of this power circuit reaches-more than the 72V, and the maximum 3A of load current.
Described control circuit submodule also comprises the soft starting circuit unit, and this soft starting circuit unit can be arranged on the periphery of PWM control unit, also can be integrated in PWM control unit inside.The effect of this soft starting circuit unit is to reduce starting current in whole starting process as much as possible, and making does not have rush of current when switching.Therefore this soft starting circuit unit can prevent surge, reach the moment overvoltage that hot plug produces, to avoid damaging subscriber line circuit.
As seen,, adjust duty ratio, thereby adjust output voltage, guarantee that subscriber's line can operate as normal under the different electrical power input condition to realize the conversion of wide region power supply input by the PWM control unit by monitoring and feedback to output voltage.And when input voltage is higher, has voltage stabilizing function.
With reference to Fig. 1, show a preferred embodiment of power supply processing circuit module of the present invention, control circuit submodule and major loop submodule are two chief components of present embodiment.Wherein the major loop submodule is a comparatively typical B UCK circuit, comprises N-channel MOS pipe, energy storage inductor L
1, fly-wheel diode and some filter capacitors etc., as shown in Figure 1, R
LBe output loading, L
1Be energy storage inductor.When metal-oxide-semiconductor is opened, the main circuit current load R that flows through
LWith energy storage inductor L
1, and to L
1Charging; When metal-oxide-semiconductor turn-offs, L
1By fly-wheel diode VD
1To load discharge.Therefore, can control output voltage by regulating duty ratio that metal-oxide-semiconductor opens, and PNP triode VT
1The feedback voltage signal V that the Voltage loop feedback circuit of forming produces
FBBe directly proportional V with output voltage
FBBe sent in the control circuit submodule and handle, and resistance R
iThe main circuit current sampled signal that end produces is also sent into the control circuit submodule, forms the dicyclo PWM control unit of an outer voltage current inner loop.Simultaneously, the pwm signal of this control circuit submodule generation can be controlled opening and turn-offing of metal-oxide-semiconductor.
The control circuit submodule is the core of power supply processing circuit module with the PWM control unit, and outer periphery can effectively prevent the moment overvoltage that hot plug produces in respect of the soft starting circuit unit.In order to simplify circuit diagram, so this soft starting circuit unit not shown in Figure 1.When system powered on, this soft starting circuit was opened power circuit by the charging process time-delay of electric capacity, can avoid the overvoltage of hot plug moment generation like this, and then avoid damaging circuit.
In parameter set unit, emitter resistance and collector resistance R for indicating among Fig. 1
eAnd R
c, according to follow-up V during Fig. 1 is described in detail
Out=I
b* R
b+ I
e* R
e+ V
Eb, V
FB=2.5v=I
c* R
c, I
c=B * I
b, I
c=I
eSeveral like this relations, collector current I during according to feedback equalization
cFor calculating about 1mA, triode amplification coefficient B can look into handbook and obtain a definite value in addition, according to wanting output voltage V
OutCan comprehensively obtain R
eWith R
cRatio relation.
When circuit was in open loop situations, output voltage depended on the maximum duty cycle d that circuit can be realized, i.e. V
Out=V
In* d is if ignore base voltage and emitter base reversed bias voltage, V in addition
Out=I
e* R
eIf, R
cConstant, R
eWith R
cRatio more little be R
eMore little, I when reaching feedback equalization
cThe constant then I of electric current
eAlso constant, output voltage V so
OutDiminish, then input voltage V
InAlso diminish collector current I when concrete account form reaches feedback equalization for supposition
cFor 1mA is constant, R then
cAlso constant, reduce R
eWith R
cRatio just reduce R
eValue then cause V
OutReduce, because the constant then V of maximum duty cycle
InAlso reduced this V
InIt is exactly the critical point input voltage value.
For a change, the PWM control unit of present embodiment adopts a PNP triode VT who is operated in the linear amplification zone
IRealize the Voltage loop feedback, and then realize the control to output voltage, this Voltage loop feedback system is very simple.As shown in Figure 1, present embodiment setting base current is I
b, base resistance is R
b, emitter current is I
e, emitter resistance is R
e, collector current is I
c, collector resistance is R
c, triode VT
1Emitter and base bias voltage are V
Eb, amplification coefficient is B, load is R
L, I
c=I
e, output voltage V
Out=I
b* R
b+ I
e* R
e+ V
Eb, feedback voltage signal V
FB=I
c* R
cAccording to PWM control unit builtin voltage comparator reference, require feedback voltage V
FBWhen feedback equalization, be operated in about 2.5V.So, because triode VT
1Be between the amplification region, satisfy condition again: I
c=B * I
b, consider the output of actual needs simultaneously and with reference to triode VT
1Amplification coefficient B, therefore can set base resistance R by parameter set unit
bBe about 475k Ω, emitter resistance R
eBe about 51k Ω, collector resistance R
cBe about 2.5k Ω, so then can satisfy feedback voltage V
FB=I
c* R
cThe needs of=2.5V.
And the mode of PWM control unit employing proportional integral realizes the dicyclo pulse width modulation controlled of outer voltage current inner loop, to finish the control to output voltage.The signal of electric current loop sampling is sent into the PWM control unit originally and is only shielded for turn-off metal-oxide-semiconductor when the major loop overcurrent, but resistance R of signal serial connection that present embodiment comes this current sample
1And capacitor C
1Mode (R with proportional integral
1, C
1) be coupled to voltage feedback signal V
FBOn, the dicyclo PWM control unit of an outer voltage current inner loop of formation.So, the mode by this proportional integral reduces steady-state error, and then improves the stability of circuit, and improves the load-carrying ability of output.In the present embodiment, work as resistance R
1Get 27k Ω, capacitor C
1When getting the 100pF left and right sides, effect is better.
As seen by above-mentioned, this power supply processing circuit module has advantages such as circuit structure is simple, with low cost, area occupied is little, carrying load ability is strong, output voltage ripple is stable.
With reference to Fig. 2, show the structure of subscriber line circuit of the present invention system, mainly comprise: CPU module 201, VCP module 202, coding/decoding module 203, intelligent subscriber line interface circuit (ISLIC) module 204 and power circuit module 205 specifically are described below:
Coding/decoding module 203, can adopt intelligent subscriber line speech processing circuit (ISLAC) module, realize analog/digital (A/D) conversion, digital-to-analog (D/A) conversion, filtering, two/four line conversion of audio signal, the digital signal processor that the ISLAC module includes (DSP), parameter is set to realize different impedance parameter couplings and AC characteristic pointer by computed in software, this ISLAC module can comprise 16 ISLAC chips; This coding/decoding module 203 is the 3.3V power supply, can innerly produce ringing-current, and all AC characteristic parameter and DC characteristic parameter is able to programme fully in the coding/decoding module 203, and has complete testing oneself and user line testing.In addition, the choosing of the high-speed synchronous serial line interface (SPI) of each coding/decoding module 203 chips and sheet all can be controlled by VCP module 202.
Intelligent subscriber line interface circuit (ISLIC) module 204 is with the coding/decoding module 203 collaborative BORSCHT functions of finishing subscriber line circuit; This ISLIC module is 3.3V power supply, ringing-current and duplicate supply feed in supporting, and ISLIC support+68V～-the feed scope of 70V, can be used in far, user closely.ISLIC module 204 of the present invention can comprise 32 ISLIC chips.In addition, ISLIC module 204 outsides also are provided with protective circuit, to realize the defencive function to subscriber line interface, prevent to damage inner coding/decoding module 203 and ISLIC module 204 etc.
It is emphasized that highly integrated ISLAC module and ISLIC module in the described subscriber line circuit system, increased at least one times than in the past on the subscriber line circuit usage quantity.And, the intellectuality of described subscriber line circuit system height, for example: whole subscriber line circuit system can be by a VCP module by 16 ISLAC chips of control and 32 ISLIC chips, realize all subscriber line circuit function and test functions, can realize management and scheduling by a CPU module, and finish and the communicating by letter of upper level control unit whole subscriber's lines.
With reference to Fig. 3, show a preferred embodiment of subscriber line circuit of the present invention system, present embodiment is converted to the voltage that subscriber line circuit can operate as normal by the power supply processing circuit in the power circuit module with the power supply input of wide region.As shown in Figure 3, arrowband time slot bus (PCM HW) interface connects master control borad by backboard, and the CPU module connects master control borad by Ethernet interface.Finish functions such as master control to the subscriber line circuit system, maintenance, version download by the CPU module, the VCP module is controlled the ISLAC module by the firmware program of VCP, make the ISLAC module finish work such as the A/D conversion of audio signal, D/A conversion, filtering, two/four line conversion, the ISLAC module is to the back notice ISLIC module of finishing dealing with of audio signal, finish the BORSCHT function of subscriber line circuit with the ISLIC module, and then finish functions such as calling out control, test.
In call control procedure, when the user's off-hook of certain road, ISLAC offers the VCP module with this information by serial communication interface, and the VCP module is issued this offhook message the CPU module of subscriber line circuit again, and then sends to master control borad by Ethernet interface.When master control borad receives this offhook message, then connect user place, this road voice channel time slot, this moment, this road user side can dial.In this road subscriber dialing and communication process, the VCP module does not participate in substantially.When the user's on-hook of this road, same VCP module sends to the CPU module with this on-hook message again, offers master control borad by Ethernet interface then, and master control borad is then closed user place, this road voice channel time slot.
In test process, the test command that the CPU module will need to test a certain road is issued the VCP module, the VCP module reads the various test parameters that need by serial communication interface and carries out calculation process from the ISLAC that controls this road user, after conversion, test result is offered the CPU module, to such an extent as to also can further send this test result to master control borad network management center as required.
In addition, finish defencive function, prevent to damage inner coding/decoding module and ISLIC module etc. subscriber line interface by being arranged on protective circuit on the subscribers feeder.
Present embodiment respectively formed specifically being described below of structure:
The CPU module comprises the Ethernet physical interface (PHY) of guiding (BOOT), internal memory and 10M/100M, the type of this internal memory can be Synchronous Dynamic Random Access Memory (SDRAM), this CPU module is finished master control to the subscriber line circuit system, maintenance, management and version and is downloaded, and for example: the HBI interface by the VCP module downloads to the firmware program of VCP module in the VCP module, by the firmware program interface that calls the VCP module VCP module carried out BOOT, Routine Management etc.
The VCP module can be on the basis of voice processor controls, to its operation such as programme, revise or more newly-increased functions, for example: the 2M clock of VCP module is upgraded to the 8M clock, and the VCP module is communicated to realize download firmware, control subscriber line circuit, monitor user ' circuit and to report function such as test result by HBI interface and CPU module.The VCP module realizes the up-downgoing HW line of 8M by adopting 8M clock and 8K frame head, carries out business information such as transferring voice, data, can provide 128 time slots to satisfy the needs of 64 road subscriber's lines at most.
Present embodiment can be finished the operations such as calling control, monitoring and circuit self-test to whole 64 tunnel subscriber line circuits, and test result is reported by signals such as communicating by letter between this VCP module and the ISLAC module, middle part choosings.For example: in calling procedure, the VCP module mainly is to detect off-hook and on-hook signal, and off-hook or on-hook message are sent to the CPU module, so by Ethernet interface to reporting to master control borad, connect or close relevant voice channel time slot by master control borad.In testing process, when the CPU module when the monitoring of a certain speech channel or test command are issued the VCP module, VCP module elder generation gating is controlled the chip selection signal of the ISLAC chip on this road, the relevant parameter that reads circuit by serial communication interface from the related register of this ISLAC chip row operation of going forward side by side is handled then, reaching monitoring or the circuit self-test function to this speech channel, the state of monitoring or test result also are upwards to be sent to master control borad, network management center even by the CPU module.
What the coding/decoding module of present embodiment adopted is the ISLAC module, this ISLAC module comprises 16 four-way ISLAC chips, realize A/D conversion, D/A conversion, filtering, two/four line conversion of audio signal, the DSP that includes is provided with parameter by computed in software and realizes different impedance parameter couplings and AC characteristic pointer.
The ISLIC module comprises 32 binary channels ISLIC chips, finishes the required basic function BORSCHT of 64 road subscriber line interfaces with the ISLAC module, can be used for far, user closely.This ISLIC module-external is provided with protective circuit; mainly be to go up at the subscribers feeder that is connected with this ISLIC module (being called for short the AB line) to increase semistor and diac (TVS); with overcurrent and the overvoltage protection of realization, and prevent interference such as static, surge to user interface.Usually select for use TVS as overvoltage protector, this protective circuit has the defencive function to subscriber line circuit, prevents to damage devices such as inner CODEC module and ISLIC module.
The power circuit module mainly is that needed various power supplys in the subscriber line circuit system are handled, this power circuit module comprises: power supply processing circuit submodule as shown in Figure 1, since in the communication equipment mostly based on-48V power-supply system, so in the present embodiment power supply of this subscriber line circuit be input as-48V about; The 3.3V power supply submodule that ISLAC chip and ISLIC chip are required; And 75V ringing current power source submodule.As shown in Figure 3, actual input voltage V
INCan-36V～-72V very on a large scale in, the power supply processing circuit submodule of present embodiment then can be converted into-power supply input about 48V.
Need to prove, present embodiment is by integrated ISLAC module and ISLIC module, greatly improve the integrated level of subscriber line circuit system, by the VCP module to the control of ISLAC module and ISLIC module and CPU module to the management and the scheduling of whole subscriber's line, realize the intellectuality of this subscriber line circuit system.
The present invention mainly is the VCP module to the core of monitoring of whole subscriber's lines and test, especially and CPU between communication aspects have very much progress.With reference to Fig. 4, show the flow process of VCP module method of work of the present invention, concrete steps comprise:
Step 401, subscriber line circuit system power on, and BOOT program designation CPU module realizes initialization;
Step 402, CPU module are downloaded the version that will carry out;
Wherein, the CPU module, is carried out in sdram memory from the master control borad download version by the 100 m ethernet physical interface.
Step 403, VCP module and CPU module communication, the firmware program of download VCP module;
The VCP module is passed through HBI interface and the CPU module communication on it, and the firmware program of VCP module is downloaded in the VCP module.
Step 404, the VCP module is carried out BOOT;
By the firmware program interface of CPU module invokes VCP module, and then VCP module BOOT got up.
Step 405, VCP module enter operating state.
The VCP module begins operate as normal, finishes calling control or operations such as monitoring or circuit self-test to whole 64 tunnel subscriber line circuits, and gives master control borad by the CPU module with operation result uploading.
In calling procedure, the VCP module mainly is to detect off-hook and on-hook signal, with message by CPU module, Ethernet interface to reporting to master control borad, connect or close relevant voice channel time slot by master control borad.When the CPU module when the monitoring of a certain speech channel or test command are issued the VCP module, VCP module elder generation gating is controlled the chip selection signal of the ISLAC chip on this road, the relevant parameter that reads circuit by serial communication interface from the related register of this ISLAC row operation of going forward side by side is handled then, reaching monitoring or the circuit self-test function to this speech channel, the state of monitoring or test result also are upwards to be sent to master control borad, network management center even by the CPU module.
Wherein, the VCP software kit that the present invention is special-purpose for described VCP module is provided with, to realize the functions such as control, monitoring, line test to subscriber line circuit, this has greatly alleviated the workload of software.This VCP software mainly comprises three parts: voice channel application programming interfaces (VP-API II), voice channel test function storehouse (VP-TL) and VCP firmware (VCP Firmware).
These voice channel application programming interfaces (VP-API II): VP-API II is the C program in machine code, and it is embedded in the user application, to realize the interface of user application and VCP module, finishes functions such as calling out control, line test;
This voice channel test function storehouse (VP-TL): VP-TL is the set of correlation functions such as line test, data type conversion, the C program in machine code of VP-TL is embedded in the user application, and VP-API II program realizes its corresponding function by calling these functions;
This VCP firmware (VCP Firmware): the VCP firmware is the core of VCP software, and this VCP firmware is downloaded in the VCP module before carrying out, and VP-API II and VP-TL are by the control of VCP firmware realization to the ISLAC module.
Need to prove, in the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields do not have the part that describes in detail among certain embodiment, can get final product referring to the associated description of other embodiment.
The above only is preferred embodiment of the present invention, just is used for description and interpretation the present invention, is not to be used to limit protection scope of the present invention.Within spirit of the present invention and claim protection range, to any modification of effect of the present invention, be equal to and replace and change, all fall into protection scope of the present invention.
Claims (10)
1, a kind of power supply processing circuit module is characterized in that, comprising:
The major loop submodule, be used for to input voltage purify, rectification and step-down handle;
The control circuit submodule is used to control and adjust the voltage of handling through the major loop submodule, with the voltage output supply load that obtains.
2, power supply processing circuit module according to claim 1 is characterized in that, described control circuit submodule comprises:
The Voltage loop feedback unit adopts the PNP triode that is operated in the linear amplification zone to realize the Voltage loop feedback;
The pulse width modulation controlled unit is used for control output voltage, and the mode of employing proportional integral realizes the dicyclo pulse width modulation controlled of outer voltage current inner loop;
Parameter set unit, the emitter resistance by setting described PNP triode and the ratio of collector resistance are adjusted the operation interval of power supply processing circuit module.
3, power supply processing circuit module according to claim 1 and 2 is characterized in that, described control circuit submodule also comprises:
Periphery, described pulse width modulation controlled unit is located in the soft starting circuit unit, the moment overvoltage that last surge when preventing to start and hot plug produce.
4, a kind of subscriber line circuit system is characterized in that, comprising:
Central processing module carries out master control, management, maintenance and download firmware and program to the subscriber line circuit system; By speech control module the intrasystem circuit of subscriber line circuit is managed and dispatches;
Speech control module is used for communicating by letter with central processing module, downloads voice control firmware program, control coding/decoding module, to realize subscriber line circuit function, test function;
Coding/decoding module carries out analog/digital conversion, digital-to-analog conversion, filtering, two/four line conversion to audio signal; Afterwards, notify intelligent subscriber line interface circuit module;
Intelligent subscriber line interface circuit module, feed function, over-voltage protecting function, ringer function, function for monitoring, codec functions, two/four lines of finishing subscriber line circuit with coding/decoding module jointly mix translation function and test function;
The power circuit module is used for providing power supply to the subscriber line circuit system, and handles power supply.
5, subscriber line circuit according to claim 4 system is characterized in that described power circuit module comprises the power supply processing circuit submodule, and this power supply processing circuit submodule further comprises:
Main loop unit, be used for to input voltage purify, rectification and step-down handle;
Control circuit unit is used to control and adjust the voltage of handling through main loop unit, with the voltage output supply load that obtains.
6, subscriber line circuit according to claim 5 system is characterized in that described control circuit unit comprises:
Voltage loop feedback subelement adopts the PNP triode that is operated in the linear amplification zone to realize the Voltage loop feedback;
The pulse width modulation controlled subelement is used for control output voltage, and the mode of employing proportional integral realizes the dicyclo pulse width modulation controlled of outer voltage current inner loop;
Parameter is provided with subelement, and the emitter resistance by setting described PNP triode and the ratio of collector resistance are adjusted the operation interval of power supply processing circuit submodule.
7, according to claim 4 or 5 or 6 described subscriber line circuit systems, it is characterized in that described speech control module adopts the 8M clock, by downloading voice-operated firmware program with communicating by letter of CPU module, reporting test result.
8, subscriber line circuit according to claim 7 system is characterized in that, described coding/decoding module adopts 16 four-way intelligent subscriber line speech processing circuit chips.
9, subscriber line circuit according to claim 8 system; it is characterized in that; described intelligent subscriber line interface circuit module adopts 32 binary channels intelligent subscriber line interface circuit chips; and and subscribers feeder between be provided with protective circuit, to prevent to damage inner coding/decoding module and intelligent subscriber line interface circuit module.
10, a kind of voice control method is characterized in that, comprising:
The subscriber line circuit system powers on, and the guiding central processing module is realized initialization;
Central processing module is downloaded version and the voice-operated firmware program that will carry out;
To the speech control module channeling conduct, this speech control module is finished the calling control of subscriber line circuit or monitoring or circuit self-test operation, and with operation result uploading.
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| CNA2009100774764A CN101483384A (en) | 2009-02-13 | 2009-02-13 | Electric power processing circuit module, subscriber circuit system and voice control method |
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| CNA2009100774764A CN101483384A (en) | 2009-02-13 | 2009-02-13 | Electric power processing circuit module, subscriber circuit system and voice control method |
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