SI22181A

SI22181A - Supply voltage control procedure

Info

Publication number: SI22181A
Application number: SI200500319A
Authority: SI
Inventors: Vinko Kunc; Maja Atanasijevic-Kunc; Andrej Vodopivec
Original assignee: Vinko Kunc; Maja Atanasijevic-Kunc; Andrej Vodopivec
Priority date: 2005-11-22
Filing date: 2005-11-22
Publication date: 2007-06-30

Abstract

According to the procedure for controlling the supply voltage U0 of the electronic circuit, the control element with adjustable resistivity, having the external supply voltage Ui attached to its input terminal, is controlled by the amplified difference between the reference voltage and part of the controlled supply voltage, where first the starting moment of operation of the control circuit and the supply electronic circuit are detected, while after that in the specified moment such a reference voltage level is applied that the controlled supply voltage U0 is equal to the highest acceptable voltage for supplying the electric circuit and that the electronic circuit is subjected to the maximum current consumption. Then the operating voltage drop (Ui - U0)w at the control element is measured in regular intervals while later the reference voltage is decreased every time by one level in each timeframe until the voltage drop (Ui-U0)w is smaller or equal to the selected most suitable value (Ui-U0)optim for the voltage drop. The voltage circuit being supplied with power is set to the state of standard current consumption, when the operating voltage drop (Ui- U0)w exceeds the selected most suitable value (Ui-U0)optim for the aforementioned voltage drop. According to an optional version, the voltage drop (Ui-U0)w is then measured continuously and its level drops due to an interrupt in the external supply voltage Ui beneath the selected lowest level (Ui-U0)min for the specified voltage drop, in this case involving a probably harmful voltage for the electronic circuit so a flag is set in the memory that after the first next start-up of the control circuit and the electronic circuit following the setting of the flag in the memory, the electronic circuit is supplied with a one by delta U0w lower level voltage drop. The suggested procedure for adjusting the controlled supply voltage enables its automatic adjustment to the highest possible value, while at the same time its quality regarding the reducing of the jamming level is provided.

Description

Postopek za reguliranje napajalne napetostiProcedure for regulating the supply voltage

Izum se nanaša na postopek za reguliranje napajalne napetosti elektronskega vezja, po katerem se regulacijski element s spremenljivo upornostjo, ki v regulacijskem vezju prevaja napajalni tok za elektronsko vezje in na katerega vhodni sponki je zunanja napajalna napetost Ui, krmili z ojačeno razliko med referenčno napetostjo in delom regulirane napajalne napetosti, pri čemer jez izumom predlagani postopek primeren za oskrbo priprav za obdelavo podatkov z električnim tokom.The invention relates to a method for regulating the supply voltage of an electronic circuit, according to which a variable-resistance control element, which in the control circuit translates the supply current for the electronic circuit and to which the input terminals are an external supply voltage Ui, is controlled by a reinforced difference between the reference voltage and partly controlled voltage supply, wherein the dam of the invention is a method suitable for supplying data processing devices with electrical current.

Izum je po mednarodni klasifikaciji patentov uvrščen v razred G 06F 01/26.The invention is classified in class G 06F 01/26 according to the International Patent Classification.

Ena osnovnih zahtev pri načrtovanju elektronskega vezja je zagotoviti odpornost na spreminjanje napajalne napetosti oziroma v njej prisotne motnje.One of the basic requirements when designing an electronic circuit is to provide resistance to changing supply voltage or interference.

Z reguliranjem napetosti za napajanje elektronskega vezja se po eni strani s čim nižjo razpoložljivo napetostjo želi doseči napetost, kije primerna za to elektronsko vezje, in se po drugi strani želi čim bolj znižati nivo motenj v omenjeni razpoložljivi napetosti. Obe težnji sta si nasprotni, saj se nivo motenj v razpoložljivi napetosti uspešneje zniža, čim večja je razlika med razpoložljivo napetostjo in napetostjo, s katero se napaja elektronsko vezje. Večji padec napetosti na regulacijskem vezju torej zagotavlja boljšo odpornost na motnje v razpoložljivi napetosti. Nasprotno pa zahteva po čim višji regulirani napajalni napetosti pri dani razpoložljivi napetosti pomeni manjši padec napetosti na regulacijskem vezju.By regulating the voltage to power the electronic circuit, on the one hand, with the lowest available voltage, it seeks to achieve a voltage that is suitable for that electronic circuit and, on the other, seeks to minimize the level of interference in said available voltage. The two tendencies are opposite, since the level of disturbance in the available voltage is reduced more successfully, the greater the difference between the available voltage and the voltage used to power the electronic circuit. A larger voltage drop on the control circuit therefore provides better resistance to disturbances in the available voltage. On the contrary, the requirement for the highest regulated supply voltage at a given available voltage means a smaller voltage drop on the control circuit.

Kadar so motnje v napajalni napetosti velike ali ima napajano elektronsko vezje nizko odpornost na motnje, je potrebno izboljšati kakovost napajalne napetosti v pogledu stabilnosti in nivoja motenj, s tem da se napajalna napetost regulira.When power supply interferences are large or the electronic circuit has a low resistance to interference, it is necessary to improve the quality of the supply voltage in terms of stability and fault level by regulating the supply voltage.

Uporabi se na primer znano regulacijsko vezje Γ, katerega izhodna regulirana napetost napaja elektronsko vezje 2 (sl. 1). Zunanja napajalna napetost na vhodu regulacijskega vezja Γ mora biti višja od regulirane napajalne napetosti in se ne sme spreminjati v širšem obsegu. Kot regulacijski element lis spremenljivo upornostjo se uporabi regulacijski tranzistor, ki prevaja napajalni tok za elektronsko vezje 2 in na katerega vhodni sponki je zunanja napajalna napetost. Njegova prevodnost se krmili z izhodno napetostjo ojačevalnika 12, ki ojači razliko med stalno referenčno napetostjo iz generatorja 13' in z napetostnim delilnikom 14 (premoščen je z blokirnim kondenzatoijem 15) določenim delom regulirane napajalne napetosti.For example, a known control circuit Γ whose output regulated voltage supplies the electronic circuit 2 (Fig. 1) is used. The external supply voltage at the input of the control circuit Γ must be higher than the regulated supply voltage and must not vary over a wider range. As a variable resistor lis variable element, a control transistor is used to conduct the supply current for the electronic circuit 2 and to which the input terminals have an external supply voltage. Its conductivity is controlled by the output voltage of the amplifier 12, which amplifies the difference between the constant reference voltage from the generator 13 'and the voltage divider 14 (bridged by the blocking condensate 15) of a certain portion of the regulated supply voltage.

Nadalje je poznano vezje za reguliranje napajalne napetosti (US 2003/0111987), s katerim se kljub majhnemu napetostnemu padcu na tem vezju izboljša odpornost na motnje v zunanji napajalni napetosti, s tem da se regulacijski element s spremenljivo upornostjo krmili z izhodno napetostjo odštevalnika, ki od zunanje napajalne napetosti odšteje izhodno napetost ojačevalnika napake, ki ojači razliko med stalno referenčno napetostjo in z napetostnim delilnikom določenim delom regulirane napajalne napetosti. Odziv na motnje v napajalni napetosti je hitrejši, saj se vsaj del krmilne napetosti pridobi mimo povratne zanke, ki ima omejeno hitrost zaradi potrebne stabilnosti. Vendar že pri zunanji napajalni napetosti, kije višja od predvidene, ni več mogoče doseči smiselnega kompromisa med padcem napetosti na regulacijskem vezju in njegovo odpornostjo na motnje. Opisano regulacijsko vezje torej ne deluje več optimalno, kadar se zunanja napajalna napetost med delovanjem lahko spremeni ali pa kadar naj isto regulacijsko vezje deluje v širšem razponu zunanje napajalne napetosti.Furthermore, a known voltage supply circuit is known (US 2003/0111987), which, despite a small voltage drop on this circuit, improves resistance to interferences in the external supply voltage by controlling the variable resistor by the output voltage of a timer that subtracts the output voltage of the fault amplifier from the external supply voltage, which amplifies the difference between the constant reference voltage and the voltage divider with a specified portion of the regulated supply voltage. The response to disturbances in the supply voltage is faster, since at least part of the control voltage is acquired past the feedback loop, which has a limited speed due to the required stability. However, even with an external supply voltage higher than predicted, a meaningful compromise can no longer be reached between the voltage drop on the control circuit and its resistance to interference. The described control circuit therefore no longer functions optimally when the external supply voltage may change during operation or when the same control circuit is expected to operate over a wider range of external supply voltage.

Kadar je treba napajati elektronsko vezje, ki deluje v širokem območju napajalne napetosti in pri dani zunanji napajalni napetosti potrebuje čim višjo regulirano napajalno napetost, da se na primer omogoči doseči čim večja izhodna moč, je za optimalno delovanje treba posebej nastaviti regulirano napajalno napetost pri vsaki večji spremembi zunanje napajalne napetosti. Optimalno delovanje se doseže, ko je regulirana napetost kar se da visoka, regulacijsko vezje pa pa pri tem deluje zadovoljivo.When it is necessary to power an electronic circuit that operates over a wide range of supply voltages and, at a given external supply voltage, requires a maximum regulated supply voltage, for example, to achieve maximum output power, the regulated supply voltage must be set separately for optimum performance. major change in external supply voltage. Optimal operation is achieved when the regulated voltage is as high as possible and the control circuit operates satisfactorily.

Izum rešuje tehnični problem, kako izvesti postopek za reguliranje napajalne napetosti, da bo pri vsaki razpoložljivi zunanji napajalni napetosti kakovostna regulirana napajalna napetost čim višja glede na pričakovane motnje v zunanji napajalni napetosti.The invention solves the technical problem of how to perform a process for regulating the supply voltage, so that for every available external supply voltage, the quality regulated supply voltage is as high as possible with respect to the expected disturbances in the external supply voltage.

Navedeni tehnični problem je rešen s postopkom po izumu za reguliranje napajalne napetosti, opredeljenim z značilnostmi iz označujočega dela prvega patentnega zahtevka, podzahtevki pa opredeljujejo variante osnovnega izvedbenega primera tega postopka.Said technical problem is solved by the method according to the invention for regulating the supply voltage, defined by the characteristics of the marking part of the first patent claim, and the sub-claims defining variants of the basic embodiment of this process.

Postopek po izumu za reguliranje napajalne napetosti omogoča samodejno nastavitev le-te na čim višjo vrednost, pri čemer pa je zagotovljena tudi njena kakovost v pogledu znižanja nivoja motenj.The process according to the invention for regulating the supply voltage allows it to be automatically set to the highest possible value, while also ensuring its quality in terms of reducing interference levels.

Izum bo v nadaljnjem podrobno obrazložen na osnovi opisa osnovnega in variantnih izvedbenih primerov ter pripadajočega načrta, ki prikazuje na sl. 2 regulacijsko vezje, s katerim se izvaja postopek po izumu za reguliranje napajalne napetosti in sl. 3 graf časovnega poteka naslednjih veličin po začetku delovanja regulacijskega vezja in napajanega elektronskega vezja s sl. 2, in sicer zunanje napajalne napetosti in regulirane napajalne napetosti (1. okno), padca napetosti na regulacijskem vezju (2. okno), ki izvaja postopek po izumu, in toka na izhodu regulacijskega vezja (3. okno), ki napaja elektronsko vezje.The invention will hereinafter be explained in detail based on the description of the basic and variant embodiments and the accompanying plan showing in FIG. 2 is a control circuit for carrying out the process of the invention for regulating the supply voltage and FIG. 3 is a graph of the time course of the following quantities after the control circuit and the powered electronic circuit have started operating in FIG. 2, namely the external supply voltages and the regulated supply voltages (1st window), the voltage drop on the control circuit (2nd window) performing the process of the invention, and the current at the output of the control circuit (3rd window) supplying the electronic circuit .

Postopek po izumu za reguliranje napajalne napetosti Uo se lahko izvaja z regulacijskim vezjem 1, katerega izhodna regulirana napetost Uo na njegovi izhodni sponki o napaja elektronsko vezje 2 s tokom Io (sl. 2). Regulacijski element 11, na katerega vhodni sponki i je zunanja napajalna napetost Ui, se krmili z izhodno napetostjo ojačevalnika 12, ki ojačuje razliko med referenčno napetostjo iz krmiljenega generatoija 13 spremenljive referenčne napetosti in z napetostnim delilnikom 14 (je premoščen z blokimim kondenzatorjem 15) nastavljenim delom regulirane napajalne napetosti Uo. Z merilnikom 16 izmerjeni padec napetosti na regulacijskem elementu 11 se vodi v krmilno vezje 17, ki po postopku po izumu za reguliranje napajalne napetosti Uo po eni strani nastavlja vrednost referenčne napetosti na izhodu generatoija 13 in po drugi strani postavlja elektronsko vezje 2 v stanje naj večje in v stanje normalne tokovne porabe.The process of the invention for regulating the supply voltage Uo can be performed with a control circuit 1 whose output regulated voltage Uo at its output terminal o supplies the electronic circuit 2 with the current Io (Fig. 2). The control element 11, to which the input terminals i is an external supply voltage Ui, is controlled by the output voltage of the amplifier 12, which amplifies the difference between the reference voltage from the variable-voltage controlled generator 13 and the voltage divider 14 (bridged with a block capacitor 15) partly regulated Uo supply voltage. With the meter 16, the measured voltage drop on the control element 11 is led to a control circuit 17 which, according to the method of the invention for regulating the supply voltage Uo, on the one hand, sets the value of the reference voltage at the output of the generator 13 and, on the other hand, places the electronic circuit 2 in the highest state and into a state of normal current consumption.

Po predlaganem postopku se v prvem koraku zazna trenutek tos začetka delovanja regulacijskega vezja in elektronskega vezja (1. okno na sl. 3). Trenutek tos začetka delovanja regulacijskega vezja in elektronskega vezja je tisti trenutek, v katerem razliki dveh druga za drugo izmerjenih vrednosti tako zunanje napajalne napetosti Ui kot regulirane napajalne napetosti Uo padeta pod izbrano vrednost, na primer v intervalu od 10 mV do 100 mV. Trenutek tos začetka delovanja pa je lahko opredeljen tudi s signalom za vzpostavitev stanja delovanja v napajanem elektronskem vezju 2.Following the proposed procedure, the moment of start of operation of the control circuit and the electronic circuit is detected in the first step (1st window in Fig. 3). The moment when the control circuit and the electronic circuit start to operate is the moment when the difference between the measured values of both the external supply voltage Ui and the regulated supply voltage Uo fall below the selected value, for example, in the interval from 10 mV to 100 mV. However, the moment of initiation may also be defined by the signal for the operation state in the powered electronic circuit 2.

V drugem koraku predlaganega postopka se v omenjenem trenutku tos začetka delovanja nastavi takšna vrednost referenčne napetosti, da bo regulirana napajalna napetost Uo enaka najvišji dovoljeni napetosti za napajanje elektronskega vezja 2 (2.In the second step of the proposed procedure, at this time, the starting voltage is set at such a point that the regulated supply voltage Uo is equal to the maximum permissible voltage for supplying the electronic circuit 2 (2.

okno na sl. 3). Obenem se napajano elektronsko vezje 2 postavi v stanje največje tokovne porabe (3. okno na sl. 3). Regulacijsko vezje 1 je tedaj polno obremenjeno. Postopek nastavitve se torej izvaja v najbolj zahtevnih pogojih delovanja.the window of FIG. 3). At the same time, the powered electronic circuit 2 is placed in the state of maximum current consumption (window 3 in Fig. 3). The control circuit 1 is then fully loaded. The setup process is therefore carried out under the most demanding operating conditions.

V nekaj nadaljnjih korakih se izmeri delovni padec (Ui-Uo)w napetosti na omenjenem regulacijskem elementu 11 v rednih časovnih intervalih po nekaj milisekund in se zatem referenčna napetost vsakič zniža za eno stopnjo. To pomeni, da se delovni napetostni padec (Ui-Uo)w v rednih časovnih intervalih po 0,1 milisekunde do nekaj milisekund povečuje v stopnjah AUow, katerih vrednosti so v intervalu od 20 mV do 300 io mV (2. okno na sl. 3). Takšni koraki se izvajajo, dokler je omenjeni delovni napetostni padec (Ui-Uo)w nižji od ali enak izbrani najprimernejši vrednosti (Ui-Uo)optim za omenjeni napetostni padec, ki bo opredeljena spodaj.In a few further steps, the operating drop (Ui-Uo) w of the voltage at said control element 11 is measured at regular intervals of a few milliseconds, and the reference voltage is then reduced by one step each time. This means that the operating voltage drop (Ui-Uo) w at regular intervals of 0.1 milliseconds to a few milliseconds increases in AUow rates, whose values are in the range of 20 mV to 300 io mV (2nd window in Fig. 3 ). Such steps are carried out as long as said operating voltage drop (Ui-Uo) w is less than or equal to the selected most suitable value (Ui-Uo) optim for said voltage drop, which will be defined below.

Potem ko je omenjeni delovni napetostni padec (Ui-Uo)w presegel izbrano naj15 primernejšo vrednost (Ui-Uo)optim za omenjeni napetostni padec, se v trenutku tnos izvede naslednji korak po predlaganem postopku, v katerem se napajano elektronsko vezje postavi v stanje normalne tokovne porabe. Izvedena nastavitev regulacijskega vezja 1 pa se shrani v pomnilniku.After the said operating voltage drop (Ui-Uo) w exceeds the selected most suitable (Ui-Uo) optim value for the said voltage drop, the next step is carried out in the next step according to the proposed procedure in which the powered electronic circuit is set to normal current consumption. The setting of control circuit 1 is stored in memory.

Regulirana napajalna napetost Uo je sedaj nastavljena po osnovnem izvedbenem primeru postopka po izumu.The regulated power supply Uo is now set according to the basic embodiment of the process of the invention.

Omenjeni delovni napetostni padec (Ui-Uo)w pa se odtlej po variantni izvedbi predlaganega postopka vseeno meri neprekinjeno. Če njegova vrednost zaradi motenj v zu25 nanji napajalni napetosti Ui pade pod izbrano najnižjo vrednost (Ui-Uo)min za omenjeni napetostni padec, se v primeru za elektronsko vezje 2 veijetno nevarne motnje bo opredeljena v nadaljevanju - kot naslednji korak predlaganega postopka postavi znamenje v pomnilniku. To znamenje opozarja, da naj se po prvem, postavitvi znamenja v pomnilniku sledečem začetku delovanja regulacijskega vezja 1 in elektronskega vezja 2 elektronsko vezje 2 izvede naslednji korak po predlaganem postopku: elektronsko vezje 2 naj se napaja pri za eno stopnjo AUow povečanem omenjenem delovnem napetostnem padcu (Ui-Uo)w.Said working voltage drop (Ui-Uo) w has, however, been measured continuously since the variant implementation of the proposed procedure. If its value due to the disturbance in zu25 on the supply voltage Ui falls below the selected minimum value (Ui-Uo) min for the said voltage drop, then in the case of electronic circuit 2 the potentially dangerous disturbance will be defined below - the next step of the proposed procedure is marked in memory. This sign points out that after the first marking in memory, the next step in the operation of the control circuit 1 and the electronic circuit 2, the electronic circuit 2 is to perform the following step according to the proposed procedure: the electronic circuit 2 should be powered at one step AUow increased by said operating voltage drop (Ui-Uo) w.

Po predlaganem postopku pa lahko po izvedeni postavitvi znamenja v pomnilniku regulacijsko vezje 1 in elektronsko vezje 2 začneta delovati pri za eno stopnjo AUow povečanem delovnem napetostnem padcu (Ui-Uo)w že, ko elektronsko vezje 2 prvič preide v stanje mirovanja ali pripravljenosti, na primer pri uporabi predlaganega postopka pri napajanju računalnika.According to the proposed method, after the marking has been made in memory, the control circuit 1 and the electronic circuit 2 can start operating at a one-step AUow increased operating voltage drop (Ui-Uo) w as soon as the electronic circuit 2 enters hibernation or standby mode, at an example of using the proposed procedure to power a computer.

Pri tem se kot omenjena najnižja vrednost (Ui-Uo)min za omenjeni napetostni padec izbere tista najnižja vrednost omenjenega delovnega napetostnega padca (Ui-Uo)w, ki še omogoča normalno delovanje regulacijskega vezja 1 (2. okno na sl. 3). S tem potrebnim najmanjšim padcem napetosti na regulacijskem vezju 1 se določi želj eni nivo zmanjšanja v zunanji napajalni napetosti Ui prisotnih motenj. Postopek po izumu torej dopušča, da se zunanja napajalna napetost Ui spreminja in tudi da se isto regulacijsko vezje 1 uporabi za različne zunanje napajalne napetosti Ui. Regulirana napajalna napetost Uo se zunanji napajalni napetosti Ui prilagodi tako, da se doseže kompromis med nasprotujočima si zahtevama, in sicer po čim višji regulirani napajalni napetosti Uo in željenem nivoju zmanjšanja v zunanji napajalni napetosti Ui prisotnih motenj. Najnižja vrednost (Ui-Uo)min za napetostni padec na regulacijskem vezju 1 se izbere v intervalu od 100 mV do 500 mV, v izvedbenem primeru s sl. 3 je enaka 120 mV, in se nastavi v konfiguracijskem registru krmilnega vezja 17. Uporabnik pa lahko nastavi višjo vrednost, če se mu glede na poznavanje značaja motenj v zunanji napajalni napetosti Ui to zdi primemo.Here, the lowest value (Ui-Uo) min for the voltage drop is chosen as the lowest value of the mentioned operating voltage drop (Ui-Uo) w, which still allows the control circuit 1 to function normally (2nd window in Fig. 3). This required minimum voltage drop on control circuit 1 determines the desired level of decrease in the external supply voltage Ui of the disturbances present. The process of the invention therefore permits the external supply voltage Ui to vary and also the same control circuit 1 to be used for different external supply voltages Ui. The regulated supply voltage Uo is adjusted to the external supply voltage Ui so as to reach a compromise between the conflicting requirements after the highest regulated supply voltage Uo and the desired level of reduction in the external supply voltage Ui of the disturbances present. The lowest value (Ui-Uo) min for voltage drop on control circuit 1 is selected in the interval from 100 mV to 500 mV, in the embodiment of FIG. 3 is equal to 120 mV, and is set in the configuration register of the control circuit 17. However, the user can set a higher value if, in the light of his knowledge of the nature of the disturbances in the external supply voltage Ui, this seems appropriate.

Kot omenjena najprimernejša vrednost (Ui-Uo)optim za omenjeni napetostni padec se izbere za predvideni nivo motenj v zunanji napajalni napetosti (Ui) povečana omenjena najnižja vrednost (Ui-Uo)min za omenjeni napetostni padec.As the aforementioned preferred value (Ui-Uo), the optimum for said voltage drop is selected for the predicted level of disturbance in the external supply voltage (Ui), the increased mentioned minimum value (Ui-Uo) min for said voltage drop.

Kot za elektronsko vezje 2 veijetno nevarna motnja se oceni motnja v zunanji napajalni napetosti Ui, ki ima eno izmed naslednjih dveh značilnosti:As for electronic circuit 2, a possibly dangerous disturbance, the disturbance in the external supply voltage Ui, which has one of the following two characteristics, is evaluated:

pod njenim vplivom delovni napetostni padec (Ui-Uo)w pade pod izbrano najnižjo vrednost (Ui-Uo)min za čas v trajanju polperiode v elektronsko vezje 2 vstopajočega signala z najvišjo frekvenco ali polperiode internih signalov elektronskega vezja z naj višjo frekvenco ;under its influence, the operating voltage drop (Ui-Uo) w falls below the selected minimum value (Ui-Uo) min for the duration of the half-period into the electronic circuit 2 of the highest frequency incoming signal or the half-cycle of the internal signals of the highest frequency;

druga za drugo se kratkotrajne motnje pojavljajo s frekvenco pod najvišjo frekvenco v elektronsko vezje 2 vstopajočega signala ali internih signalov elektronskega vezja.one after the other, short-term interferences occur at a frequency below the highest frequency in the electronic circuit 2 of the input signal or the internal signals of the electronic circuit.

Regulacijsko vezje 1 in elektronsko vezje 2 pa po postopku po izumu začneta zopet delovati pri za eno stopnjo AUow povečanem delovnem napetostnem padcu (Ui-Uo)w tudi po prvem začetku delovanja regulacijskega vezja in elektronskega vezja, potem ko je bil pred tem omenjeni delovni napetostni padec zaradi veijetno nevarnih motenj povečan za AUow, le takrat, če je v predhodnem delovanju tudi pri omenjenem povečanem delovnem napetostnem padcu vrednost le-tega zaradi motenj v zunanji napajalni napetosti Ui ponovno kdaj padla pod izbrano vzdrževalno vrednost (UiUo)m za omenjeni napetostni padec.The control circuit 1 and the electronic circuit 2, according to the method according to the invention, start operating again at a one-step AUow increased operating voltage drop (Ui-Uo) w even after the first start-up of the control circuit and the electronic circuit after the previously mentioned operating voltage a fall due to a potentially dangerous disturbance increased by AUow only if, in the previous operation, even with the aforementioned increased operating voltage drop, the value of it due to disturbances in the external supply voltage Ui ever again fell below the selected maintenance value (UiUo) m for the said voltage drop .

Pri tem se kot omenjena vzdrževalna vrednost (Ui-Uo)m za napetostni padec izbere za eno stopnjo AUow povečanja omenjenega delovnega napetostnega padca zvišana najnižja vrednost (Ui-Uo)min za omenjeni napetostni padec (2. okno na sl. 3). Vzdrževalna vrednost (Ui-Uo)m za omenjeni napetostni padec je približno 1,5-kratna najnižja vrednost (Ui-Uo)min za omenjeni napetostni padec. Izbere se v intervalu od 120 mV do 700 mV.In doing so, the minimum value (Ui-Uo) min for the mentioned voltage drop (2nd window in Fig. 3) is selected as one maintenance value (Ui-Uo) m for the voltage drop by one degree AUow of the increase of the said operating voltage drop. The maintenance value (Ui-Uo) m for said voltage drop is approximately 1.5 times the minimum value (Ui-Uo) min for said voltage drop. It is selected in the interval from 120 mV to 700 mV.

Claims

Patent claims

1. A method for regulating the supply voltage Uo of an electronic circuit, according to which a variable-resistance control element, which conducts a supply current for the electronic circuit in the control circuit, and to which the input terminal is an external supply voltage Ui, is controlled by a reinforced difference between the reference voltage and the part regulated supply voltages, characterized in that the moment of start of operation of the control circuit and the electronic circuit is detected in order to set a reference voltage value at said moment of operation that the regulated supply voltage Uo is equal to the maximum permissible voltage for supplying the electronic circuit, and is powered puts the electronic circuit in the state of maximum current consumption so that the operating drop (Ui-Uo) w of the voltage at said control element is measured at regular intervals and then the reference voltage is reduced by one stage each time as long as the said operating voltage drop (Ui-Uo) ) w lower than or equal to the selected prime higher value (Ui-Uo) optim for said voltage drop, and to place the powered electronic circuit in a state of normal current consumption when said operating voltage drop (Ui-Uo) w exceeds the selected most suitable value (Ui-Uo) optim for said voltage drop.

Method according to claim 1, characterized in that said operating voltage drop (Ui-Uo) w is measured continuously from the time of setting to normal current conditions and if its value falls below the selected minimum value (Ui due to a disturbance in the external supply voltage Ui) -Uo) min for the said voltage drop, in the case of an electronic circuit, a dangerous disturbance is likely to be made in memory, that after the first indication of the control circuit and the electronic circuit, the electronic circuit should be energized at one stage AUow increased to the said operating voltage drop (Ui-Uo) w.

Method according to claim 2, characterized in that the falling of said operating voltage drop (Ui-Uo) w below the selected minimum value (Ui-Uo) of min for said voltage drop at least for the duration of the half-period into the electronic circuit of the highest frequency input signal or the half frequency of the internal signals of the electronic circuit with the highest frequency is estimated as a dangerous disturbance for the electronic circuit.

A method according to claim 2 or 3, characterized in that the short-term interferences occurring at a frequency below the highest frequency in the electronic circuit of the input signal or internal signals of the electronic circuit are evaluated as likely to be dangerous interferences for the electronic circuit.

Method according to claim 3 or 4, characterized in that after the marking is made in memory, the control circuit and the electronic circuit start operating at a one-step AUow increased operating voltage drop (Ui-Uo) w when the electronic circuit first goes to sleep or standby.

Method according to claim 3 or 4, characterized in that, even after the first start-up of the control circuit and the electronic circuit, after the above-mentioned operating voltage drop (Ui-Uo) w has been increased by AUow due to probably dangerous disturbances the circuit and the electronic circuit start operating again at a single stage AUow increased operating voltage drop only if, in the previous operation, even with the mentioned increased operating voltage drop, the value of the circuit due to disturbance in the external supply voltage Ui ever again falls below the selected maintenance value (Ui -Uo) m for said voltage drop.

Method according to claim 1 or 6, characterized in that the moment of the start of operation of the control circuit and the electronic circuit is the moment in which the difference between the two alternately values of both the external supply voltage Ui and the regulated supply voltage Uo fall below the selected value v interval from 10 mV to 100 mV.

Method according to claim 7, characterized in that in the state of maximum current consumption, said operating voltage drop (Ui-Uo) w at regular intervals of 0.1 milliseconds to a few milliseconds increases in AUow values whose values are in the interval from 100 mV to 300 mV.

Method according to claim 8, characterized in that the lowest value of said operating voltage drop (Ui-Uo) w is selected as said minimum value (Ui-Uo) min for said voltage drop, which still allows the control circuit to function normally.

A method according to claim 9, characterized in that the lowest value (Ui-Uo) min for said voltage drop is selected in the range from 100 mV to 500 mV.

A method according to claim 9 or 10, characterized in that, as said preferred value (Ui-Uo), the optimum for said voltage drop is selected for the predicted level of disturbance in the external supply voltage (Ui), the increased said minimum value (Ui-Uo) min for said voltage drop.

A method according to claim 11, characterized in that, as said maintenance value (Ui-Uo) m for said voltage drop is selected by one degree AUow of increase of said operating voltage drop, the said lowest value (Ui-Uo) min is increased for said voltage drop.

Method according to claim 12, characterized in that the maintenance value (Ui-Uo) m for said voltage drop is about 1.5 times the minimum value (Ui-Uo) min for said voltage drop.

10. The method of claim 12, wherein the maintenance value (Ui-Uo) m for said voltage drop is selected in the range from 120 mV to 700 mV.