DE102011052533B4 - Circuit arrangement for protecting memory contents - Google Patents
Circuit arrangement for protecting memory contents Download PDFInfo
- Publication number
- DE102011052533B4 DE102011052533B4 DE201110052533 DE102011052533A DE102011052533B4 DE 102011052533 B4 DE102011052533 B4 DE 102011052533B4 DE 201110052533 DE201110052533 DE 201110052533 DE 102011052533 A DE102011052533 A DE 102011052533A DE 102011052533 B4 DE102011052533 B4 DE 102011052533B4
- Authority
- DE
- Germany
- Prior art keywords
- battery
- voltage
- comparator
- buffer capacitor
- power switch
- 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.)
- Active
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/005—Circuit means for protection against loss of information of semiconductor storage devices
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
- G11C5/141—Battery and back-up supplies
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
- G11C5/143—Detection of memory cassette insertion or removal; Continuity checks of supply or ground lines; Detection of supply variations, interruptions or levels ; Switching between alternative supplies
Abstract
Batterieversorgte Elektronik enthaltend eine Batterie (6), die über Kontakte (K1, K2) verbunden ist mit einer keine weiteren Batterien aufweisende Schaltungsanordnung zur Spannungsversorgung eines flüchtigen Speichers und zum Schutz von Speicherinhalten des flüchtigen Speichers bei kurzzeitigen Unterbrechungen an mindestens einem der Kontakte (K1 oder K2), wobei die Schaltungsanordnung einen Stromschalter (2) aufweist, dessen Eingänge mit einem Komparator (3) über dessen Ausgänge, von denen zueinander inverse Schaltspannungen (Vs) und (Vsneg) geliefert werden, in Verbindung stehen, wobei der Komparator (3) eingangsseitig mit der zu überwachenden Batteriespannung (Vb) und mit einer Schwellspannung (Vsch), die von einer Konstantspannungsquelle (5) erzeugt wird, beschaltet ist und der Komparator (3), die Konstantspannungsquelle (5) und der Stromschalter (2) zur Betriebsspannungsversorgung mit einem Pufferkondensator (Cmem) beschaltet sind.Battery-powered electronics comprising a battery (6), which is connected via contacts (K1, K2) with a circuit having no further batteries for powering a volatile memory and protecting memory contents of the volatile memory in case of brief interruptions at least one of the contacts (K1 or K2) K2), the circuit arrangement having a current switch (2) whose inputs are connected to a comparator (3) via its outputs, from which inverse switching voltages (Vs) and (Vsneg) are supplied, the comparator (3) On the input side with the battery voltage to be monitored (Vb) and with a threshold voltage (Vsch), which is generated by a constant voltage source (5) is connected and the comparator (3), the constant voltage source (5) and the power switch (2) to the operating voltage supply a buffer capacitor (Cmem) are connected.
Description
Die Erfindung betrifft eine Schaltungsanordnung zum Schutz von Speicherinhalten bei kurzzeitigem Spannungsausfall, insbesondere von batterieversorgten Elektroniken.The invention relates to a circuit arrangement for protecting memory contents in the event of a momentary power failure, in particular of battery-powered electronics.
Moderne, batteriegestützte, miniaturisierte Sensoren sind oft mit einem Mikrocontroller zur Datenverarbeitung und einem RAM-Speicher zur Datenspeicherung ausgestattet. Diese kostengünstigen Sensoren werden direkt von der Batterie gespeist, arbeiten sehr stromarm und sind bestens für den Langzeiteinsatz geeignet. Infolge starker Schwing- und Stoßbelastung (z. B. Entfernungssensor am Gewehr) kann es beim Abheben der Batteriekontaktierung zu kurzzeitigen Spannungsausfällen kommen, die dann automatisch zum Datenverlust führen können. Bekannte Methoden, den möglichen Datenverlust zu vermeiden, sind Datenspeicherung mittels nichtflüchtiger Speicher und Spannungspufferung. Bei der Datenspeicherung auf nichtflüchtigen Speichern werden aktuelle Daten ständig zwischengespeichert, um diese nach einem Spannungsausfall wieder aufrufen zu können. Die ständige Zwischenspeicherung und die Interruptbehandlung kosten Zeit. Nichtflüchtige Speicher können aus Ladungsspeicherzellen (Flash) bestehen, die eine nur begrenzte Anzahl von Programmierzyklen (ca. 100 T) haben und sich deshalb für die ständige Zwischenspeicherung nicht eignen. Mit der
Die Erfindung soll nachstehend anhand eines Ausführungsbeispieles näher erläutert werden. Dabei zeigt The invention will be explained below with reference to an exemplary embodiment. It shows
Der elektronische Schalter
Die inverse Ansteuerung der Eingänge wird mit Hilfe des Komparators
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- elektronischer Schalterelectronic switch
- 22
- Stromschalterpower switch
- 33
- Komparatorcomparator
- 44
- Diodediode
- 55
- KonstantspannungsquelleConstant voltage source
- 66
- Batteriebattery
- TnTn
- NMOS-TransistorNMOS transistor
- Tptp
- PMOS-TransistorPMOS transistor
- K1K1
- KontaktContact
- K2K2
- KontaktContact
- CmemCmem
- Pufferkondensatorbuffer capacitor
- Rmemrmem
- elektrische Last des flüchtigen Speicherselectrical load of the volatile memory
- RkRk
- Widerstandresistance
- Zkzk
- ZenerdiodeZener diode
- Rere
- elektrischen Last der übrigen Elektronikelectrical load of the remaining electronics
- VbVb
- zu kontrollierenden Batteriespannungto be controlled battery voltage
- VbatVbat
- Batteriespannungbattery voltage
- VccVcc
- Betriebsspannungoperating voltage
- Vschsch
- Schwellspannungthreshold
- Vsvs
- Schaltspannungswitching voltage
- VsnegVsneg
- inverse Schaltspannunginverse switching voltage
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110052533 DE102011052533B4 (en) | 2011-08-09 | 2011-08-09 | Circuit arrangement for protecting memory contents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110052533 DE102011052533B4 (en) | 2011-08-09 | 2011-08-09 | Circuit arrangement for protecting memory contents |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102011052533A1 DE102011052533A1 (en) | 2013-02-14 |
DE102011052533B4 true DE102011052533B4 (en) | 2015-02-26 |
Family
ID=47595397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201110052533 Active DE102011052533B4 (en) | 2011-08-09 | 2011-08-09 | Circuit arrangement for protecting memory contents |
Country Status (1)
Country | Link |
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DE (1) | DE102011052533B4 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD276998A3 (en) * | 1986-12-19 | 1990-03-21 | Robotron Messelekt | CIRCUIT ARRANGEMENT FOR THE PROTECTION OF MEMORY CONTENTS IN MICRORECHNER UNITS IN THE EVENT OF VOLTAGE FAILURE |
DE68927941T2 (en) * | 1988-05-16 | 1997-08-14 | Fujitsu Ltd | Data protection system in a data processing system |
US5798961A (en) * | 1994-08-23 | 1998-08-25 | Emc Corporation | Non-volatile memory module |
US20030200382A1 (en) * | 2002-04-18 | 2003-10-23 | Wells Owen Newton | Methods and apparatus for backing up a memory device |
-
2011
- 2011-08-09 DE DE201110052533 patent/DE102011052533B4/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD276998A3 (en) * | 1986-12-19 | 1990-03-21 | Robotron Messelekt | CIRCUIT ARRANGEMENT FOR THE PROTECTION OF MEMORY CONTENTS IN MICRORECHNER UNITS IN THE EVENT OF VOLTAGE FAILURE |
DE68927941T2 (en) * | 1988-05-16 | 1997-08-14 | Fujitsu Ltd | Data protection system in a data processing system |
US5798961A (en) * | 1994-08-23 | 1998-08-25 | Emc Corporation | Non-volatile memory module |
US20030200382A1 (en) * | 2002-04-18 | 2003-10-23 | Wells Owen Newton | Methods and apparatus for backing up a memory device |
Also Published As
Publication number | Publication date |
---|---|
DE102011052533A1 (en) | 2013-02-14 |
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R020 | Patent grant now final | ||
R081 | Change of applicant/patentee |
Owner name: JENOPTIK OPTICAL SYSTEMS GMBH, DE Free format text: FORMER OWNER: ESW GMBH, 22880 WEDEL, DE Owner name: JENOPTIK ADVANCED SYSTEMS GMBH, DE Free format text: FORMER OWNER: ESW GMBH, 22880 WEDEL, DE |
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R082 | Change of representative |
Representative=s name: GLEIM PETRI OEHMKE PATENT- UND RECHTSANWALTSPA, DE Representative=s name: PATENTANWAELTE OEHMKE UND KOLLEGEN, DE |
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R081 | Change of applicant/patentee |
Owner name: JENOPTIK OPTICAL SYSTEMS GMBH, DE Free format text: FORMER OWNER: JENOPTIK ADVANCED SYSTEMS GMBH, 22880 WEDEL, DE |
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R082 | Change of representative |
Representative=s name: PATENTANWAELTE OEHMKE UND KOLLEGEN, DE Representative=s name: GLEIM PETRI OEHMKE PATENT- UND RECHTSANWALTSPA, DE |
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Representative=s name: GLEIM PETRI PATENT- UND RECHTSANWALTSPARTNERSC, DE Representative=s name: GLEIM PETRI OEHMKE PATENT- UND RECHTSANWALTSPA, DE |
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R082 | Change of representative |
Representative=s name: GLEIM PETRI PATENT- UND RECHTSANWALTSPARTNERSC, DE |