EP2368159A1 - Digital control device for a parallel pmos transistor board - Google Patents
Digital control device for a parallel pmos transistor boardInfo
- Publication number
- EP2368159A1 EP2368159A1 EP09801235A EP09801235A EP2368159A1 EP 2368159 A1 EP2368159 A1 EP 2368159A1 EP 09801235 A EP09801235 A EP 09801235A EP 09801235 A EP09801235 A EP 09801235A EP 2368159 A1 EP2368159 A1 EP 2368159A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- data
- control
- voltage
- error data
- digital
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0008—Arrangements for reducing power consumption
- H03K19/0016—Arrangements for reducing power consumption by using a control or a clock signal, e.g. in order to apply power supply
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/12—Modifications for increasing the maximum permissible switched current
- H03K17/122—Modifications for increasing the maximum permissible switched current in field-effect transistor switches
Definitions
- the invention relates to controlling voltages for low power circuits.
- the medium of electronic circuits and related components is an area that has grown particularly strongly.
- IPs parts
- SoC System on Chip
- NoC Network on Chip
- a solution for the voltage control of these circuits is the use of numerically controlled numerically controlled PMOS transistor arrays.
- the resistance of the array varies, and the voltage supplied to the device downstream with it.
- thermometers The logic of control of these tables have until now remained rudimentary, mainly with ramp methods with linear slope, commonly called thermometers.
- the invention improves the situation.
- the invention proposes a digital control device for an array of PMOS transistors in parallel comprising: - a working memory for digitally storing error data between a target voltage and a target voltage, and control data, these data being each provided with a time marker, a digital order filter chosen to calculate a set increment data from error data in the working memory selected according to data input error, and arranged to store in the working memory said input error data with a corresponding time stamp, a control computer, arranged to calculate new control data, from the incrementation data of command and control data in the working memory chosen according to the input error data, and to store the new command data in the working memory.
- FIG. 1 represents a general diagram of a NoC controlled by a control device according to the invention
- FIG. 2 represents a modular view of the control device of FIG. 1;
- FIG. 3 represents an embodiment of an element of the device of FIG. 2.
- FIG. 4 represents an embodiment of another element of the device of FIG. 2.
- FIG. 1 shows a NoC 2 which is voltage controlled by a PMOS board 4 and a voltage source 6.
- the PMOS board 4 is digitally controlled by a control device 8.
- the NoC 2 is represented by its extrinsic electrical characteristics, i.e., it is considered a load with a capacitance 10, a resistor 12, and a current leakage 14 (represented by a leakage current generator ).
- the ideal voltage source 6 provides a voltage Vh which is supplied at an input 16 of the PMOS board 4 and an input 18 of the controller 8.
- the PMOS 4 has an output 20 which is connected to an input 22 of the device 8, and which supplies the NoC 2 described above.
- the PMOS board 4 comprises a set of n PMOS transistors arranged in parallel. Each transistor has a resistor Ri, and is individually controlled by an input 24 of the PMOS board 4 which receives an output 26 of the control device 8.
- the voltages received at the inputs 18 and 22 of the device 8 generate a digital control on the output 26 of this device, and this command makes it possible to individually control each of the transistors of the PMOS board 4, so that the voltage Vh received at input 16 is controlled by the activated transistors.
- the device 8 coupled to Table 4 can control the NoC 2 in voltage between a high voltage Vhi and a low voltage VIo.
- the set of PMOS transistors have the same resistance
- the Joule power dissipated by an element is equal to RI 2 .
- the invention overcomes this through the control device 8, which reduces the energy dissipated in several ways.
- FIG. 2 represents a modular view of the control device 8 which explains the principle of operation thereof.
- the control device 8 comprises analog-to-digital converters 30 and 32, a subtracter 34, a digital filter 36, and a control computer 38.
- the converter 30 receives the input 18 of the device 8 to convert the voltage V re f target numerically.
- the target voltage V ref is received as input from a higher level outer loop of NoC management.
- the converter 32 receives the input 22 of the device 8 to convert the output voltage V c of the PMOS board 4 (i.e., the control voltage of the NoC 2) numerically.
- the outputs of converters 30 and 32 are connected to subtractor 34, so that it outputs the difference Q ⁇ between these two voltages.
- the difference is the error, i.e., the voltage jump that is required to bring the control voltage to its target value.
- the index k indicates that this value is taken for the kth sample (or no time).
- the digital filter 36 receives as input the difference e k, the voltage V c in digital form (hereinafter denoted V Ck ), and an intensity information ⁇ IM from an input 40 of the device 8 which will be described with the figure 3.
- ⁇ I M is a user-specified constant, and describes a maximum bound on the intensity jumps each time the PMOS chart is refreshed.
- the digital filter 36 calculates an increment step which corresponds to the number of transistors to be activated or deactivated to compensate for the digital voltage error e k .
- This incremental jump of the command is then transmitted to the control computer 38 which converts it into digital control to control the PMOS board 4.
- FIG. 3 represents a particular embodiment of the digital filter 36.
- the digital filter comprises a retarder 42, a multiplier 44, a retarder 46, a subtractor 48, a multiplier 50, a subtractor 52, and a limiter 54.
- the self-timer 42 receives the input 34 of the digital filter 36.
- the function of the self-timer 42 is to output the error from the time step preceding the received input. In this case, the self-timer 42 therefore returns the error e k-1 .
- the error e ⁇ is transmitted to the retarder 46, to the multiplier 44, and to the subtractor 48.
- the retarder 46 functions as the retarder 42, so that at the output of the retarder 46, the error e k-2 is obtained.
- the error e k-2 . is then transmitted to the subtractor 48, which outputs the difference of the errors e k-1 . and e k-2 . This difference is sent to the multiplier 50.
- the multiplier 44 and the multiplier 50 return their input multiplied by a fixed coefficient.
- the outputs of the multipliers 44 and 50 are connected to the subtracter 52, so that the latter returns the difference between the multiple of the error e k-1 . and the multiple of the difference between the errors e k-1 . and e k-2 ..
- the filtering part itself is therefore performed by the retarder 42, the multiplier 44, the retarder 46, the subtractor 48, the multiplier 50, and the subtracter 52.
- the values of the coefficients of the multipliers 44 and 50 are respectively chosen according to the NoC 2 data and the data of the PMOS 4 table, according to the following formulas (3) and (5) of Appendix A.
- U k1 is the number of transistors in the PMOS transistors array that are activated at the low voltage level
- - Ro is the characteristic resistance of the resistors of the PMOS transistors array
- - RJ is the dynamic resistance of the NoC at the low voltage level
- - b is the inverse of the time constant R 0 C
- - ⁇ i is the inverse of the time constant RiC
- the limiter 54 further improves the performance of the digital filter 36.
- the result that the resulting exception at the output of the subtractor 52 may have a high value.
- the limiter 54 is used to control these losses by limiting the value that can take ⁇ u k , to limit the corresponding intensity jump.
- the limiter 54 receives Vk input and ⁇ IM.
- ⁇ IM represents the maximum intensity jump accepted for the digital filter 36 in order to limit the energy losses.
- ⁇ IM is fixed and equal to (Vhi-Vlo) / 2Ro. This makes it possible to obtain a fairly continuous current with reduced energy losses.
- a bounded transistor incrementation value ⁇ u k (b) is obtained.
- the control computer 38 will take this incrementation value and transform it into a command itself.
- FIG. 4 represents an embodiment of the control computer 38.
- the control computer 38 comprises a rounder 56, an adder 58, a retarder 62 and a limiter 60.
- the rounder 56 receives the output of the digital filter 36. Indeed, the bounded increment value that comes out is not necessarily complete, or we will activate or deactivate an integer number of transistors.
- the rounder 56 functions as a conventional integer value function, rounding up to the larger integer if the decimal part is greater than or equal to 0.5 and rounding up to the lower integer otherwise.
- the output of the rounder 56 is connected to the adder 58, which also receives the output of the retarder 62.
- the retarder 62 sends the adder 58 the control of the previous time step.
- the value obtained for U k may exceed the number of transistors in the PMOS 4 array.
- the value U k is therefore sent into the limiter 60 at the output of the adder 58.
- the limiter 60 limits the absolute value of U k so that it does not exceed the total number of transistors. array of PMOS transistors.
- the command U k is transmitted on the output 26 to the input 24 of the table of PMOS 2.
- each element that uses data stored or stored can have a memory space of its own.
- a set of memories can be shared between several elements.
- a memory can be provided for each group of elements.
- a single memory may be shared by all the elements of the device 8.
- the digital filter can be of order greater than 2, and with different constants
- the limiters can limit differently the different signals according to whether they are positive or negative, and not only limit the absolute value of these signals; - the rounder may be omitted in some cases;
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Power Sources (AREA)
- Dc-Dc Converters (AREA)
- Control Of Voltage And Current In General (AREA)
- Semiconductor Integrated Circuits (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0807342A FR2940474B1 (en) | 2008-12-22 | 2008-12-22 | DIGITAL CONTROL DEVICE FOR A TABLE OF PARALLEL PMOS TRANSISTORS |
PCT/FR2009/001442 WO2010072913A1 (en) | 2008-12-22 | 2009-12-17 | Digital control device for a parallel pmos transistor board |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2368159A1 true EP2368159A1 (en) | 2011-09-28 |
Family
ID=40846940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09801235A Withdrawn EP2368159A1 (en) | 2008-12-22 | 2009-12-17 | Digital control device for a parallel pmos transistor board |
Country Status (6)
Country | Link |
---|---|
US (1) | US9264041B2 (en) |
EP (1) | EP2368159A1 (en) |
JP (1) | JP5661047B2 (en) |
CN (1) | CN102292678B (en) |
FR (1) | FR2940474B1 (en) |
WO (1) | WO2010072913A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2615752A1 (en) * | 1976-04-10 | 1977-10-27 | Licentia Gmbh | Voltage or current stabilisation circuit - passes actual value to A:D converter and obtains nominal value from reference generator for matching in digital adder |
TW299529B (en) * | 1991-11-27 | 1997-03-01 | Philips Nv | |
US5614801A (en) * | 1995-07-10 | 1997-03-25 | Allen-Bradley Company, Inc. | Apparatus for effectively handling a saturation condition in a digital compensator |
US5969514A (en) * | 1997-11-24 | 1999-10-19 | National Semiconductor Corporation | Digital feedback power supply |
US7023190B2 (en) * | 2003-02-10 | 2006-04-04 | Power-One, Inc. | ADC transfer function providing improved dynamic regulation in a switched mode power supply |
US7122990B2 (en) * | 2003-09-15 | 2006-10-17 | Princeton Technology Corporation | Digital servo motor controller IC design for preventing the power feedback effect during manual adjusting the servo motor |
-
2008
- 2008-12-22 FR FR0807342A patent/FR2940474B1/en not_active Expired - Fee Related
-
2009
- 2009-12-17 EP EP09801235A patent/EP2368159A1/en not_active Withdrawn
- 2009-12-17 WO PCT/FR2009/001442 patent/WO2010072913A1/en active Application Filing
- 2009-12-17 US US13/141,466 patent/US9264041B2/en not_active Expired - Fee Related
- 2009-12-17 JP JP2011541535A patent/JP5661047B2/en not_active Expired - Fee Related
- 2009-12-17 CN CN200980155270.7A patent/CN102292678B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2010072913A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2940474B1 (en) | 2011-03-18 |
CN102292678B (en) | 2014-11-12 |
JP5661047B2 (en) | 2015-01-28 |
US20110295441A1 (en) | 2011-12-01 |
WO2010072913A1 (en) | 2010-07-01 |
US9264041B2 (en) | 2016-02-16 |
JP2012513628A (en) | 2012-06-14 |
CN102292678A (en) | 2011-12-21 |
FR2940474A1 (en) | 2010-06-25 |
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Inventor name: CANUDAS DE WIT, CARLOS Inventor name: ALBEA SANCHEZ, CAROLINA |
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