CN105912085A - Peripheral circuit for on-chip system - Google Patents
Peripheral circuit for on-chip system Download PDFInfo
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- CN105912085A CN105912085A CN201610209979.2A CN201610209979A CN105912085A CN 105912085 A CN105912085 A CN 105912085A CN 201610209979 A CN201610209979 A CN 201610209979A CN 105912085 A CN105912085 A CN 105912085A
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- electronic circuit
- voltage
- circuit
- power supply
- resistance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The invention discloses a peripheral circuit for an on-chip system, which can solve the problem of over-temperature of a chip, low safety, low reliability, and short service life during large power consumption of an SOC. The peripheral circuit is characterized in that: an input end of an energy-saving sub-circuit is connected to an I/O port for outputting a pulse width modulation signal in the on-chip system; an output end of the energy-saving sub-circuit is connected to an input end of a feedback voltage division sub-circuit, wherein the energy-saving sub-circuit is used for processing the pulse width modulation signal output by the on-chip system to obtain a first voltage and sends the first voltage to the feedback voltage division sub-circuit; the feedback voltage division sub-circuit generates a feedback voltage according to the first voltage and the output voltage of a voltage output end of a power supply sub-circuit; the power supply sub-circuit is used for adjusting the output voltage of the power supply sub-circuit and inputting the adjusted output voltage to a power supply voltage input end of the on-chip system. The peripheral circuit decreases the heat of the chip, improves the safety and the reliability, and prolongs the service life.
Description
Technical field
The present invention relates to circuit design field, particularly relate to the peripheral circuit of a kind of SOC(system on a chip).
Background technology
Along with the development of chip design and manufacturing technology, SOC(system on a chip) (the System on one single chip
Chip, SOC) integrated level more and more higher, from strength to strength, incident problem is SOC to function
Power consumption the most increasing.The power consumption conference of SOC causes the chip at its place superheating phenomenon occur, so can
Reduce reliability and the safety of chip, also can shorten the service life of chip.
In order to solve the excessive heat dissipation problem caused of the power consumption of SOC in prior art, take to increase fin
Thickness, area, the area of printed wiring board and the method for the number of plies, but can not from change SOC power consumption
Aspect solves how to drop thermal center energy, the reliability improving chip, the problem that extends chip service life.
Summary of the invention
It is an object of the invention to provide the peripheral circuit of a kind of SOC(system on a chip), with solve SOC power consumption excessive time,
The problem that chip overheating, safety and reliability are low and service life is short.
It is an object of the invention to be achieved through the following technical solutions:
A kind of peripheral circuit of SOC(system on a chip), including: energy-conservation electronic circuit, feedback dividing potential drop electronic circuit and power supply
Electronic circuit；Wherein,
For the I/O of output pulse width modulated signal in the input of described energy-conservation electronic circuit and SOC(system on a chip)
Mouth connects, and the outfan of described energy-conservation electronic circuit is connected with the input of described feedback dividing potential drop electronic circuit,
Described energy-conservation electronic circuit processes for the pulse width modulating signal exporting described SOC(system on a chip),
To the first voltage for characterizing the change of described pulse width modulating signal, and by described first voltage transmission
To described feedback dividing potential drop electronic circuit；
The outfan of described feedback dividing potential drop electronic circuit is connected with the input of described power supply electronic circuit, described
Feedback dividing potential drop electronic circuit is used for the defeated of the voltage output end according to described first voltage and described power supply electronic circuit
Go out voltage, generate feedback voltage；
The voltage output end of described power supply electronic circuit is connected with the supply voltage input of described SOC(system on a chip)
Connecing, described power supply electronic circuit is for according to described feedback voltage, adjusting the output electricity of described power supply electronic circuit
Pressure, and the output voltage after adjusting is input to the supply voltage input of described SOC(system on a chip).
Optionally, described energy-conservation electronic circuit includes: rectification module and current limliting module；
Described rectification module, for described pulse width modulating signal, carries out rectification process, is formed straight
Stream voltage, and export described DC voltage to current limliting module, wherein, described pulse width modulating signal table
Show the output pulse signal of SOC(system on a chip)；
Described current limliting module, for the DC voltage exporting described rectification module, carries out current limliting voltage division processing,
Form the first voltage, and by described first voltage transmission to feedback dividing potential drop electronic circuit.
Optionally, described rectification module includes:
The RC rectification circuit that at least one resistance and at least one electric capacity are formed.
Optionally, described current limliting module includes: the resistance branch that at least one resistance is formed.
Optionally, when the resistance that described current limliting module includes is at least two, described at least two resistance uses
Series system connects.
Optionally, described feedback dividing potential drop electronic circuit includes: the first resistance, the second resistance and the first electric capacity；
Wherein, one end of described first resistance is connected with the outfan of described power supply electronic circuit, and described first
The other end of resistance by node respectively with one end of described second resistance, the outfan of described energy-conservation electronic circuit
And the input of described power supply electronic circuit is connected；
The other end of described second resistance is connected to the ground and connects；
One end of described first electric capacity is connected with the outfan of described power supply electronic circuit, described first electric capacity
The other end by described node respectively with one end of described second resistance, described energy-conservation electronic circuit outfan with
And the input of described power supply electronic circuit is connected.
Optionally, the output voltage of described power supply electronic circuit is:
Wherein, VOUTFor the output voltage of described power supply electronic circuit, VFBFor described feedback voltage.
The peripheral circuit of a kind of SOC(system on a chip) that the embodiment of the present invention provides, for dynamically adjusting SOC(system on a chip)
The energy-conservation electronic circuit of supply voltage and SOC(system on a chip) are used for the I/O mouth of output pulse width modulated signal even
Connecing, export the first voltage, the outfan of energy-conservation electronic circuit is connected with the input of feedback dividing potential drop electronic circuit；
Feedback dividing potential drop electronic circuit, according to the first voltage and the output voltage of described power supply electronic circuit, exports feedback voltage,
The outfan of feedback dividing potential drop electronic circuit is connected with the input of power supply electronic circuit；The voltage of power supply electronic circuit is defeated
Go out end to be connected with the supply voltage input of SOC(system on a chip), according to the feedback voltage received, adjust power supply
The output voltage of electronic circuit, the supply voltage that the described output voltage after adjustment is input to described SOC(system on a chip) is defeated
Enter end.Reduce the temperature of chip, improve safety and reliability, extend service life.
Accompanying drawing explanation
The schematic diagram of the peripheral circuit of a kind of SOC(system on a chip) that Fig. 1 provides for the embodiment of the present invention；
Energy-conservation electronic circuit, feedback in the peripheral circuit of a kind of SOC(system on a chip) that Fig. 2 provides for the embodiment of the present invention
Dividing potential drop electronic circuit and power supply electronic circuit schematic diagram；
A kind of pulse width modulating signal oscillogram that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical scheme providing the embodiment of the present invention is described in detail.
Embodiments provide the peripheral circuit of a kind of SOC(system on a chip), as it is shown in figure 1, be used for as sheet
System 400 is powered, including: energy-conservation electronic circuit 100, feedback dividing potential drop electronic circuit 200 and power supply electronic circuit
300；
Wherein, the input of described energy-conservation electronic circuit and SOC(system on a chip) are used for output pulse width modulated signal
I/O mouth connect, and the input phase of the outfan of described energy-conservation electronic circuit and described feedback dividing potential drop electronic circuit
Connecting, described energy-conservation electronic circuit is at the pulse width modulating signal exporting described SOC(system on a chip)
Reason, obtains the first voltage for characterizing the change of described pulse width modulating signal, and by described first electricity
Pressure transmission is to described feedback dividing potential drop electronic circuit；
The outfan of described feedback dividing potential drop electronic circuit is connected with the input of described power supply electronic circuit, described
Feedback dividing potential drop electronic circuit is used for the defeated of the voltage output end according to described first voltage and described power supply electronic circuit
Go out voltage, generate feedback voltage；
The voltage output end of described power supply electronic circuit is connected with the supply voltage input of described SOC(system on a chip)
Connecing, described power supply electronic circuit is for according to described feedback voltage, adjusting the output electricity of described power supply electronic circuit
Pressure, and the output voltage after adjusting is input to the supply voltage input of described SOC(system on a chip).
In the peripheral circuit of a kind of SOC(system on a chip) that the embodiment of the present invention provides, energy-conservation electronic circuit and SOC(system on a chip)
I/O mouth for output pulse width modulated signal connects, and the outfan of described energy-conservation electronic circuit is with described
The input of feedback dividing potential drop electronic circuit is connected, and described energy-conservation electronic circuit is for exporting described SOC(system on a chip)
Pulse width modulating signal processes, and exports the first voltage to described feedback dividing potential drop electronic circuit, described feedback
Dividing potential drop electronic circuit, according to the first voltage and the output voltage of described power supply electronic circuit, exports feedback voltage, feedback
The outfan of dividing potential drop electronic circuit is connected with the input of power supply electronic circuit；The voltage output end of power supply electronic circuit
It is connected with the supply voltage input of SOC(system on a chip), according to the feedback voltage received, adjusts power supply electricity
The output voltage on road, the described output voltage after adjustment is input to the supply voltage input of described SOC(system on a chip)
End.Reduce the temperature of chip, improve safety and reliability, extend service life.
In the embodiment of the present invention, described energy-conservation electronic circuit includes: rectification module and current limliting module；
Described rectification module, for described pulse width modulating signal, carries out rectification process, forms direct current
Voltage, and export described DC voltage to current limliting module, wherein, described pulse width modulating signal represents sheet
Upper system output pulse signal, wherein, described rectification module is by least one resistance and at least one electric capacity shape
The RC rectification circuit become；
Described current limliting module, for the DC voltage exporting described rectification module, carries out current limliting voltage division processing,
Form the first voltage, and by described first voltage transmission to feedback dividing potential drop electronic circuit, wherein, described current limliting mould
Block includes: the resistance branch that at least one resistance is formed；If the resistance that described current limliting module includes is at least two
Time individual, described at least two resistance is adopted and is connected serially.
Below by a specific embodiment, the peripheral circuit to a kind of SOC(system on a chip) in the embodiment of the present invention
Realization is described in detail, as shown in Figure 2.
Pulse width modulation (Pulse Width Modulation, the PWM) signal of SOC(system on a chip) output, even
Being connected to the rectification circuit of resistance R62 and electric capacity C78 composition, carry out rectification, form DC voltage, this is straight
The current-limiting circuit that stream voltage is composed in series through resistance R65, R64 and R63, carries out current limliting dividing potential drop, is formed
First voltage, wherein, electric capacity C78 ground connection, the waveform of pwm signal is as shown in Figure 3；
Power supply electronic circuit SW pin output supply voltage, through inductance L11 input to by resistance R61,
R68, R69 and the feedback dividing potential drop electronic circuit of electric capacity C73 composition, form feedback electricity with described first voltage
Pressure VFB；Wherein, inductance L11 is energy-storage travelling wave tube, plays the supply voltage of stabilized power source electronic circuit output
Effect；Resistance R61, R68, R69 play the effect of dividing potential drop, and electric capacity C73 plays the effect of filtering.
When the operational mode change of SOC(system on a chip), the dutycycle of pwm signal of its output and/or amplitude with
Change.Dutycycle and/or the amplitude of the pwm signal received due to rectification circuit there occurs change, because of
The DC voltage of this rectification module output changes therewith；The DC voltage received due to current-limiting circuit there occurs
Change, therefore the first voltage of current-limiting circuit output changes；Owing to feeding back what dividing potential drop electronic circuit received
First voltage there occurs change, and therefore the feedback voltage of feedback dividing potential drop electronic circuit output there occurs change.
Wherein, feedback voltage VFBIt is multiplied by again equal to resistance R68 and R69 sum and flows through resistance R68 and R69
Electric current.
Described feedback voltage VFBInput the V to power supply electronic circuitFBPin, power supply electronic circuit by described instead
Feedthrough voltage calculates the output voltage of SW pin, and this output voltage is that SOC(system on a chip) is powered.
In the embodiment of the present invention, described feedback dividing potential drop electronic circuit includes: the first resistance, the second resistance and first
Electric capacity；Wherein, one end of described first resistance is connected with the outfan of described power supply electronic circuit, and described
The other end of one resistance by node respectively with one end of described second resistance, the output of described energy-conservation electronic circuit
The input of end and described power supply electronic circuit is connected；The other end of described second resistance is connected to the ground and connects；
One end of described first electric capacity is connected with the outfan of described power supply electronic circuit, another of described first electric capacity
Hold by described node respectively with one end of described second resistance, the outfan of described energy-conservation electronic circuit and institute
The input stating power supply electronic circuit is connected；The quantity of described second resistance is not construed as limiting by the present invention.
The output voltage of described power supply electronic circuit is:
Wherein, VOUTFor the output voltage of described power supply electronic circuit, VFBFor described feedback voltage.
Illustrating, the structure of described feedback dividing potential drop electronic circuit, as in figure 2 it is shown, include: resistance R61 is
It is described first electric capacity that described first resistance, R68 with R69 connect as described second resistance, electric capacity C73,
One end of described resistance R61 is connected with the outfan of described power supply electronic circuit, described resistance R61
The other end by node A respectively with one end of described resistance R68, the outfan of described energy-conservation electronic circuit
And the input of described power supply electronic circuit is connected；One end of described R69 is connected to the ground and connects；Described electric capacity
One end of C73 is connected with the outfan of described power supply electronic circuit, and the other end of described electric capacity C73 passes through institute
State node with one end of described resistance R68, the outfan of described energy-conservation electronic circuit and described power supply respectively
The input of circuit is connected.
Wherein, the output voltage of power supply electronic circuit determines according to equation below:
Wherein, VOUTFor the output voltage of power supply electronic circuit, VFBFor feedback voltage.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter
Calculation machine program product.Therefore, the present invention can use complete hardware embodiment, complete software implementation or knot
The form of the embodiment in terms of conjunction software and hardware.And, the present invention can use and wherein wrap one or more
Computer-usable storage medium containing computer usable program code (include but not limited to disk memory,
CD-ROM, optical memory etc.) form of the upper computer program implemented.
The present invention is with reference to method, equipment (system) and computer program product according to embodiments of the present invention
The flow chart of product and/or block diagram describe.It should be understood that can by computer program instructions flowchart and
/ or block diagram in each flow process and/or flow process in square frame and flow chart and/or block diagram and/
Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embedding
The processor of formula datatron or other programmable data processing device is to produce a machine so that by calculating
The instruction that the processor of machine or other programmable data processing device performs produces for realizing at flow chart one
The device of the function specified in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or the process of other programmable datas can be guided to set
In the standby computer-readable memory worked in a specific way so that be stored in this computer-readable memory
Instruction produce and include the manufacture of command device, this command device realizes in one flow process or multiple of flow chart
The function specified in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes
Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices
Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one
The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (7)
1. the peripheral circuit of a SOC(system on a chip), it is characterised in that including: energy-conservation electronic circuit, feedback point
Pressure electronic circuit and power supply electronic circuit；Wherein,
For the I/O of output pulse width modulated signal in the input of described energy-conservation electronic circuit and SOC(system on a chip)
Mouth connects, and the outfan of described energy-conservation electronic circuit is connected with the input of described feedback dividing potential drop electronic circuit,
Described energy-conservation electronic circuit processes for the pulse width modulating signal exporting described SOC(system on a chip),
To the first voltage for characterizing the change of described pulse width modulating signal, and by described first voltage transmission
To described feedback dividing potential drop electronic circuit；
The outfan of described feedback dividing potential drop electronic circuit is connected with the input of described power supply electronic circuit, described
Feedback dividing potential drop electronic circuit is used for the defeated of the voltage output end according to described first voltage and described power supply electronic circuit
Go out voltage, generate feedback voltage；
The voltage output end of described power supply electronic circuit is connected with the supply voltage input of described SOC(system on a chip)
Connecing, described power supply electronic circuit is for according to described feedback voltage, adjusting the output electricity of described power supply electronic circuit
Pressure, and the output voltage after adjusting is input to the supply voltage input of described SOC(system on a chip).
Circuit the most according to claim 1, it is characterised in that described energy-conservation electronic circuit includes: whole
Flow module and current limliting module；
Described rectification module, for described pulse width modulating signal, carries out rectification process, is formed straight
Stream voltage, and export described DC voltage to current limliting module, wherein, described pulse width modulating signal table
Show the output pulse signal of SOC(system on a chip)；
Described current limliting module, for the DC voltage exporting described rectification module, is carried out at current limliting dividing potential drop
Reason, forms the first voltage, and by described first voltage transmission to feedback dividing potential drop electronic circuit.
Circuit the most according to claim 1, it is characterised in that described rectification module includes:
The RC rectification circuit that at least one resistance and at least one electric capacity are formed.
Circuit the most according to claim 1, it is characterised in that described current limliting module includes: at least
The resistance branch that one resistance is formed.
Circuit the most according to claim 4, it is characterised in that the resistance that described current limliting module includes
During at least two, described at least two resistance is adopted and is connected serially.
6. according to the circuit according to any one of Claims 1 to 5, it is characterised in that described feedback dividing potential drop
Electronic circuit includes: the first resistance, the second resistance and the first electric capacity；
Wherein, one end of described first resistance is connected with the outfan of described power supply electronic circuit, and described first
The other end of resistance by node respectively with one end of described second resistance, the outfan of described energy-conservation electronic circuit
And the input of described power supply electronic circuit is connected；
The other end of described second resistance is connected to the ground and connects；
One end of described first electric capacity is connected with the outfan of described power supply electronic circuit, described first electric capacity
The other end by described node respectively with one end of described second resistance, described energy-conservation electronic circuit outfan with
And the input of described power supply electronic circuit is connected.
Circuit the most according to claim 6, it is characterised in that the output electricity of described power supply electronic circuit
Pressure is:
Wherein, VOUTFor the output voltage of described power supply electronic circuit, VFBFor described feedback voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610209979.2A CN105912085A (en) | 2016-04-06 | 2016-04-06 | Peripheral circuit for on-chip system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610209979.2A CN105912085A (en) | 2016-04-06 | 2016-04-06 | Peripheral circuit for on-chip system |
Publications (1)
| Publication Number | Publication Date |
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| CN105912085A true CN105912085A (en) | 2016-08-31 |
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ID=56744624
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610209979.2A Pending CN105912085A (en) | 2016-04-06 | 2016-04-06 | Peripheral circuit for on-chip system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080067987A1 (en) * | 2006-09-15 | 2008-03-20 | Chun-Chin Tung | Variable voltage regulating device |
| CN203689430U (en) * | 2013-10-25 | 2014-07-02 | 南通同洲电子有限责任公司 | Control circuit capable of dynamically regulating power supply voltage of kernel of CPU (central processing unit) |
| CN204129648U (en) * | 2014-09-02 | 2015-01-28 | 珠海迈科智能科技股份有限公司 | A kind of voltage regulator circuit |
-
2016
- 2016-04-06 CN CN201610209979.2A patent/CN105912085A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080067987A1 (en) * | 2006-09-15 | 2008-03-20 | Chun-Chin Tung | Variable voltage regulating device |
| CN203689430U (en) * | 2013-10-25 | 2014-07-02 | 南通同洲电子有限责任公司 | Control circuit capable of dynamically regulating power supply voltage of kernel of CPU (central processing unit) |
| CN204129648U (en) * | 2014-09-02 | 2015-01-28 | 珠海迈科智能科技股份有限公司 | A kind of voltage regulator circuit |
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