DE3016244A1 - Peak voltage storage circuit - has switch control forming, in conjunction with storage capacitor, differential component for voltage applied to capacitor - Google Patents

Peak voltage storage circuit - has switch control forming, in conjunction with storage capacitor, differential component for voltage applied to capacitor

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Publication number
DE3016244A1
DE3016244A1 DE19803016244 DE3016244A DE3016244A1 DE 3016244 A1 DE3016244 A1 DE 3016244A1 DE 19803016244 DE19803016244 DE 19803016244 DE 3016244 A DE3016244 A DE 3016244A DE 3016244 A1 DE3016244 A1 DE 3016244A1
Authority
DE
Germany
Prior art keywords
voltage
capacitor
switch
storage
peak voltage
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Withdrawn
Application number
DE19803016244
Other languages
German (de)
Inventor
Manfred Dipl.-Ing. 3180 Wolfsburg Knoke
Armin 3300 Braunschweig Stiller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Priority to DE19803016244 priority Critical patent/DE3016244A1/en
Publication of DE3016244A1 publication Critical patent/DE3016244A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C27/00—Electric analogue stores, e.g. for storing instantaneous values
    • G11C27/02—Sample-and-hold arrangements
    • G11C27/024—Sample-and-hold arrangements using a capacitive memory element
    • G11C27/026—Sample-and-hold arrangements using a capacitive memory element associated with an amplifier
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

Equipment is provided to prevent an undesired discharge of the storage capacitor when the voltage applied to it falls. A switch (4) with a control circuit is provided in front of the capacitor (1). The control circuit forms, in conjunction with the capacitor (1), a differential component for the applied voltage. The circuit places the switch in the off position when the differential result is negative. The ohmic resistance of the differential component is formed by the contact resistance (6) of the switch (4). The latter (4) is controlled via a comparator (5) fed by the voltage at the storage via a voltage divider (7, 8). This arrangement is effective within a wide temp. range.

Description

Spitzenspannungsspeicher Peak voltage storage

Die. Erfindung betrifft .einen Spitzenspannungsspeicher gemäß dem Oberbegriff des Patentanspruchs 1.The. The invention relates to .ein peak voltage storage device according to the Preamble of claim 1.

Als Einrichtung zur Verhütung einer unerwunschten#Entladung der Kapazität des Speichers ist es bekannt, eine Diode vor der Kapazität anzuordnen. Nachteilig sind dabei Jedoch der Leckstrom der bekannten Dioden, Exemplarstreuungen sowie der Temperaturgang. Diese Nachteile machen Dioden zu diesem Zweck nicht.As a means of preventing undesired # discharge of capacitance of the memory, it is known to arrange a diode in front of the capacitance. Disadvantageous However, the leakage current of the known diodes, specimen variations and the Temperature response. These disadvantages do not make diodes for this purpose.

verwendbar beispielsweise bei Spitzenspannungsspeichern, die die von einem Hitzdrahtluftmassenmesser im Saugrohr einer Brennkraftmaschine abgegebene Spitzenspannung speichern sollen, die als Meßgröße für den Lastzustand der Brennkraftmaschine einer Zünd- und/oder Einspritzvorrichtung zugeführt wird.can be used, for example, for peak voltage storage devices that are used by a hot wire air mass meter in the intake manifold of an internal combustion engine To store peak voltage, which is used as a measured variable for the load condition of the internal combustion engine is fed to an ignition and / or injection device.

~Der. Erfindung liegt demgemäß.die Aufgabe zugrunde, einen Spitzenspannungsspei# -cher gemäß dem Oberbegriff des Patentanspruchs 1 so auszubilden, daß in einem großen Temperaturbereich unabhängig von Exemplarstreuungen.der verwendeten Bauteile unerwünschte Entladungen der Speicherkapazität mit Sicherheit vermieden sind.~ The. Accordingly, the invention is based on the object of providing a peak voltage storage device. -cher according to the preamble of claim 1 so that in a large Temperature range independent of sample variations. Of the components used undesirable Discharges of the storage capacity are definitely avoided.

Die erfindungsgemäße Lösung dieser Aufgabe ist gekennzeichnet durch die Merkmale des Kennzeichens des Patentanspruchs 1.The inventive solution to this problem is characterized by the features of the characterizing part of claim 1.

Durch Einsatz eines Schalters anstelle der bekannten Diode werden die Nachteile der bekannten Lösungalso mit minimalem Aufwand an elektronischen bzw. schaltungstechnischen Bauteilen vermieden.By using a switch instead of the well-known diode the disadvantages of the known solution with minimal expenditure on electronic resp. circuit components avoided.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous refinements and developments of the invention are Subject of the subclaims.

Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Figur erläutert, die ein Schaltungsschema für den erfindungsgemäßen Spitzenspannungsspeicher wiedergibt.In the following an embodiment of the invention is based on the Figure explains a circuit diagram for the peak voltage memory according to the invention reproduces.

Als wesentlichen Bestandteil enthält der Spitzenspannungsspeicher den Speicherkondensator 1, der zwischen den niederohmigen Eingang 2 und den hochohmigen Ausgang 3 des Speichers geschaltet ist. Solange die Spannung am Eingang 2 größer ist als diejenige am Ausgang 3 und damit am Kondensator 1, wird dieser aufgeladen. Sobald aber die Spannung am Eingang 2, also die an den Spitzenspannungsspeicher angelegte Spannung, niedriger wird, erfolgt eine Entladung des Kondensators 1, die verständlicherweise das Meßergebnis verfälscht.The peak voltage memory is an essential component the storage capacitor 1, which is between the low-resistance input 2 and the high-resistance Output 3 of the memory is switched. As long as the voltage at input 2 is greater is than that at output 3 and thus at capacitor 1, this is charged. But as soon as the voltage at input 2, i.e. the one at the peak voltage store applied voltage, becomes lower, a discharge of the capacitor 1 takes place, the understandably falsifies the measurement result.

Um eine derartige unerwünschte Entladung des Spitzenspannungsspeichers zu verhindern, ist zwischen den Eingang 2 und den Speicherkondensator 1 der Schalter 4 geschaltet, der über den Komparator 5 so angesteuert wird, daß bei einem Absinken der Spannung am Eingang 2 gegenüber der Spannung am Kondensator 1 der Schalter öffnet, dagegen sonst eine Aufladung über den Schalter 4 möglich ist.To such an undesired discharge of the peak voltage storage To prevent this, the switch is between input 2 and storage capacitor 1 4 switched, which is controlled via the comparator 5 so that when there is a drop the voltage at input 2 compared to the voltage at capacitor 1 the switch opens, on the other hand, charging via switch 4 is otherwise possible.

Hierzu erfaßt der Komparator 5 sowohl die dem Spitzenspannungsspeicher zugeführte Spannung am Eingang 2 als auch die Spannung am Kondensator 1, wobei der Kondensator 1 zusammen mit dem Innenwiderstand 6 des Schalters 4 ein Differenziationsglied bildet. Die Teile 1, 6 und 5 bilden also eine Ansteuerschaltung für den Schalter 4, die letztlich ein Differenzierglied für die an den Spitzenspannungsspeicher angelegte Spannung darstellt und den Schalter bei negativem Differenziationsergebnis, also bei absinkender Spannung am Eingang 2, aufsteuert.For this purpose, the comparator 5 records both the peak voltage memory supplied voltage at input 2 as well as the voltage at capacitor 1, the Capacitor 1 together with the internal resistance 6 of the switch 4 is a differentiating element forms. Parts 1, 6 and 5 thus form a control circuit for the switch 4, which is ultimately a differentiator for the voltage applied to the peak voltage store Represents voltage and the switch in the event of a negative differentiation result, i.e. opens when the voltage at input 2 drops.

Um eindeutige Verhältnisse bei Spannungsgleichheit am Eingang 2 und am Kondensator 1 zu schaffen, wird dem Komparator 5 die Eingangsspannung nicht direkt, sondern über den die Widerstände 7 und 8 enthaltenden Spannungsteiler zugeführt, so daß bei Spannungsgleichheit am Eingang und am Kondensator die am positiven Eingang des Komparators 5 anliegende Spannung etwas negativer ist als die Spannung am Minuseingang. Demgemäß erfolgt bereits jetzt ein Öffnen des Schalters 4.In order to ensure clear conditions when the voltage at input 2 and To create at the capacitor 1, the comparator 5 does not receive the input voltage directly, but supplied via the voltage divider containing the resistors 7 and 8, so that if the voltage at the input and the capacitor is the same, the voltage at the positive input of the Comparator 5 applied voltage is slightly more negative than the voltage at the minus input. Accordingly, the switch 4 is already opened.

Zum Entladen des Spitzenspannungsspeichers dient der Transistorschalter 9, der nach Abgreifen der im Kondensator 1 gespeicherten Spitzenspannung betätigt wird.The transistor switch is used to discharge the peak voltage store 9, which is actuated after the peak voltage stored in the capacitor 1 has been tapped will.

Claims (3)

Patentansprüche Spitzenspannungsspeicher mit Speicherkapazität miteiner Speicherkapazität und einer Einrichtung zur Verhütung einer unerwünschten Entladung der Kapazität bei Absinken der an den Speicher angelegten Spannung, dadurch gekennzeichnet, daß die Einrichtung einen vor der Kapazität (1) liegenden Schalter (4) mit einer Ansteuerschaltung enthält, die zusammen mit der Kapazität (1) ein Differenzierglied für die angelegte Spannung bildet und den Schalter (4> bei negativem Differenziationsergebnis aufsteuert. Claims peak voltage storage with storage capacity with one Storage capacity and a device for preventing undesired discharge the capacity when the voltage applied to the storage device drops, characterized in that that the device has a switch (4) located in front of the capacitance (1) with a Control circuit contains which, together with the capacitance (1), a differentiating element for the applied voltage and the switch (4> if the differentiation result is negative opens up. 2. Spitzenspannungsspeicher nach Anspruch 1, dadurch gekennzeichnet, daß der ohmsche Widerstand des Differenzierglieds durch den Übergangswiderstand (6) des Schalters (4) gebildet ist. 2. Peak voltage storage device according to claim 1, characterized in that that the ohmic resistance of the differentiating element through the contact resistance (6) of the switch (4) is formed. 3. Spitzenspannungsspeicher nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Schalter (4) über einen Komparator (5) angesteuert wird, der über einen Spannungsteiler (7,8) mit der an den Speicher angelegten Spannung gespeist wird. 3. peak voltage storage device according to claim 1 or 2, characterized in that that the switch (4) is controlled via a comparator (5) which has a Voltage divider (7,8) is fed with the voltage applied to the memory.
DE19803016244 1980-04-26 1980-04-26 Peak voltage storage circuit - has switch control forming, in conjunction with storage capacitor, differential component for voltage applied to capacitor Withdrawn DE3016244A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803016244 DE3016244A1 (en) 1980-04-26 1980-04-26 Peak voltage storage circuit - has switch control forming, in conjunction with storage capacitor, differential component for voltage applied to capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803016244 DE3016244A1 (en) 1980-04-26 1980-04-26 Peak voltage storage circuit - has switch control forming, in conjunction with storage capacitor, differential component for voltage applied to capacitor

Publications (1)

Publication Number Publication Date
DE3016244A1 true DE3016244A1 (en) 1981-10-29

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DE19803016244 Withdrawn DE3016244A1 (en) 1980-04-26 1980-04-26 Peak voltage storage circuit - has switch control forming, in conjunction with storage capacitor, differential component for voltage applied to capacitor

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DE (1) DE3016244A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2566915A1 (en) * 1984-06-29 1986-01-03 Saphymo Stel DETECTOR OF THE CRETE VALUE OF A PERIODIC SIGNAL
DE3723579C1 (en) * 1987-07-16 1989-02-16 Sgs Halbleiterbauelemente Gmbh Longitudinal voltage regulator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2566915A1 (en) * 1984-06-29 1986-01-03 Saphymo Stel DETECTOR OF THE CRETE VALUE OF A PERIODIC SIGNAL
EP0170554A1 (en) * 1984-06-29 1986-02-05 Saphymo-Stel Periodic-signal peak-value detector
DE3723579C1 (en) * 1987-07-16 1989-02-16 Sgs Halbleiterbauelemente Gmbh Longitudinal voltage regulator

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: VOLKSWAGEN AG, 3180 WOLFSBURG, DE

8141 Disposal/no request for examination