EP0582263A1 - Regulated power supply for DC voltage - Google Patents

Regulated power supply for DC voltage Download PDF

Info

Publication number
EP0582263A1
EP0582263A1 EP93112380A EP93112380A EP0582263A1 EP 0582263 A1 EP0582263 A1 EP 0582263A1 EP 93112380 A EP93112380 A EP 93112380A EP 93112380 A EP93112380 A EP 93112380A EP 0582263 A1 EP0582263 A1 EP 0582263A1
Authority
EP
European Patent Office
Prior art keywords
voltage
capacitor
rectifier
power supply
output 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.)
Granted
Application number
EP93112380A
Other languages
German (de)
French (fr)
Other versions
EP0582263B1 (en
Inventor
Vinzenz Dr. Von Tscharner
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.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6464984&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0582263(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of EP0582263A1 publication Critical patent/EP0582263A1/en
Application granted granted Critical
Publication of EP0582263B1 publication Critical patent/EP0582263B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/577—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices for plural loads
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices

Definitions

  • the inventor has set itself the goal of creating a DC power supply unit whose circuitry is simple and efficient and which meets the sound requirements for an audio amplifier.
  • the device according to the invention for use in the audio field is provided with a power supply unit for direct voltage, which has a “transformer and rectifier” supplying the current for the power, and a separate second "transformer and rectifier” for generating a reference voltage with which the charging process can be limited or the output voltage of the power supply can be stabilized.
  • the rectifiers are necessarily assigned a first capacitor as the upper level of a cascade, which is charged by the first rectifier and is discharged in accordance with the difference between the reference voltage of the second rectifier and the output voltage.
  • a second capacitor as the lower part of the cascade, is charged from the first capacitor at most up to the reference voltage, for example via a field effect transistor.
  • the voltage across the first capacitor is significantly higher than the output voltage within the scope of the invention.
  • the maximum voltage is the first Rectifier between 2 and 3/2 times the output voltage.
  • the voltage on the second capacitor can be stabilized at any time by charging the first capacitor (cascade).
  • a "transformer and rectifier” G1 supplies the necessary voltage in the form of half-waves and the required current for a cascade power supply unit 10.
  • the power of the rectifier G1 is sufficient to charge a first capacitor C1 to the maximum charging voltage Umax even under full load, which is preferably between 2 to 2/3 times the output voltage Uout.
  • the capacitor C1 is thus charged as the upper level of the cascade.
  • the duration of the charging is extended due to the large voltage drop across capacitor C1 during a half-wave. Thanks to these conditions, the "transformer and rectifier” G1 is loaded longer, but less heavily. The current flows more homogeneously and the "transformer and rectifier” G1 can therefore be dimensioned smaller.
  • the capacitor C1 has a sufficient capacity so that when the maximum current Imax at the output of the power supply is drawn, the voltage at the capacitor C1 does not drop below a minimum value during the O-passage of the supply voltage. This minimum value is higher than the output voltage of the power supply unit 10.
  • the capacitance of the capacitor C1 should not be greater than absolutely necessary so that the voltage fluctuations on the capacitor C1 - which also depend essentially on a resistor R1 - are large at full load; due to these voltage fluctuations, the "transformer and rectifier" G1 is loaded longer and thus more homogeneously at full load. However, the voltage fluctuations must be within the tolerance limit of the selected capacitor type.
  • An independent reference voltage Uref is connected to the gate of transistor T. The voltage difference between the reference voltage applied to the gate and the voltage across the second capacitor C2 controls the current of the transistor T for recharging the second capacitor C2.
  • the opening of the transistor T is caused by the small voltage drop across the second capacitor C2 with respect to the reference voltage, but not by a feedback to the gate.
  • the current of the transistor T is derived as directly as possible from the "transformer and rectifier" G1 - except during the O-passage of the supply voltage, during which it is only taken from the first capacitor C1.
  • the voltage at the second capacitor C2 is stabilized in a voltage range which is sufficiently narrow for audio amplifier operation.
  • the independent reference voltage Uref is generated by a separate transformer and rectifier G2.
  • a stabilized power supply unit is preferably used, since the stability of the output voltage essentially depends on that of the reference voltage. Since the reference voltage at the gate of the transistor T is never heavily loaded, it does not change even under extreme loads (short circuit) at the output of the cascade power supply 10. Therefore, the output voltage returns to the setpoint immediately and without vibrations even after a short-term extreme load.
  • the resistor R1 mentioned above has two functions; firstly, it increases the voltage fluctuations on capacitor C1 and secondly, it limits the current through transistor T and prevents its destruction. Too much resistance also increases the power loss and should therefore be avoided. At any time, the possible charging current for the capacitor C2, which is limited by the resistor R1, must be greater than the maximum current required by the power supply 10.
  • the second capacitor or output capacitor C2 can be charged from the "transformer and rectifier" G1 and the capacitor C1 via the transistor T. Its capacity buffers short current peaks and high-frequency electricity requirements. This also compensates for the inertia of the control circuit, which can easily lead to phase shifts, at all frequencies. Capacities that are smaller - or equal - than - or else the same as - that of the first capacitor C1 have proven successful; the time (R1 * C1) should be between 0.5 and 5 milliseconds; this causes a high damping factor in audio amplifiers and a great spontaneity of the music.
  • the main advantage of the interaction in the cascade of the capacitors C1 and C2 and the transistor T or the FET is that the charge for the output current, in particular at full load, is largely derived directly from the transformer and not, as in conventional power supplies , is temporarily stored in the capacitors C1, C2; the capacitors C1, C2 are only heavily loaded for a short time, in particular during O-passage and rapid load changes, and have buffer properties.
  • the capacitors C1, C2 in the cascade power supply unit 10 are therefore also dimensioned much smaller than in conventional power supply units.
  • the start-up of the power supply 10 can be slowed down by a capacitor (not shown in the drawing) at the gate of the transistor T (for example to 0.05 to 1 sec). This protects the FET and at the same time increases the stability of the output voltage.
  • FIG. 2 shows a circuit with a second resistor R2 and a second transistor T2 and a section for a negative Uout, capacitors C'1, C'2 and resistors R'1, R'2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Amplifiers (AREA)

Abstract

A device (10) having a power supply unit for DC voltage in the audio field has a transformer, which supplies the current for the power, and a rectifier (G1) as well as a separate second transformer and rectifier (G2) for generating a reference voltage (Uref) by means of which the charging process can be limited and the output voltage (Uout) of the power supply unit (10) can be stabilised. <IMAGE>

Description

Der Erfinder hat sich das Ziel gesetzt, ein Gleichspannungs-Netzgerät zu schaffen, dessen Schaltung einfach und effizient ist und den klanglichen Anforderungen an einen Audio-Verstärker entspricht.The inventor has set itself the goal of creating a DC power supply unit whose circuitry is simple and efficient and which meets the sound requirements for an audio amplifier.

Zur Lösung dieser Aufgabe führt die Lehre nach dem unabhängigen Patentanspruch; die Unteransprüche geben zusätzliche Verbesserungen an.The teaching according to the independent claim leads to solving this problem; the subclaims indicate additional improvements.

Die erfindungsgemäße Vorrichtung zum Einsatz im Audiobereich ist mit einem Netzgerät für Gleichspannung versehen, das einen den Strom für die Leistung liefernden "Transformer und Gleichrichter" aufweist sowie einen gesonderten zweiten "Transformer und Gleichrichter" zur Generierung einer Referenzspannung, mit welcher der Ladevorgang begrenzbar bzw. die Ausgangsspannung des Netzgerätes stabilisierbar ist.The device according to the invention for use in the audio field is provided with a power supply unit for direct voltage, which has a "transformer and rectifier" supplying the current for the power, and a separate second "transformer and rectifier" for generating a reference voltage with which the charging process can be limited or the output voltage of the power supply can be stabilized.

Zudem ist notwendigerweise den Gleichrichtern ein erster Kondensator als oberes Niveau einer Kaskade zugeordnet, der vom ersten Gleichrichter geladen sowie entsprechend der Differenz der Referenzspannung des zweiten Gleichrichters zur Ausgangsspannung entladen wird.In addition, the rectifiers are necessarily assigned a first capacitor as the upper level of a cascade, which is charged by the first rectifier and is discharged in accordance with the difference between the reference voltage of the second rectifier and the output voltage.

Erfindungsgemäß wird vom ersten Kondensator aus ein zweiter Kondensator als unterer Teil der Kaskade höchstens bis zur Referenzspannung geladen, beispielsweise über einen Feldeffekt-Transistor.According to the invention, a second capacitor, as the lower part of the cascade, is charged from the first capacitor at most up to the reference voltage, for example via a field effect transistor.

Als wesentlich hat es sich erwiesen, daß im Rahmen der Erfindung die Spannung am ersten Kondensator signifikant höher ist als die Ausgangsspannung. Beispielsweise liegt bei einer bevorzugten Ausführung die maximale Spannung des ersten Gleichrichters zwischen den 2- und 3/2-fachen der Ausgangsspannung.It has proven to be essential that the voltage across the first capacitor is significantly higher than the output voltage within the scope of the invention. For example, in a preferred embodiment, the maximum voltage is the first Rectifier between 2 and 3/2 times the output voltage.

Erfindungsgemäß ist die Spannung am zweiten Kondensator jederzeit durch die Ladung des ersten Kondensators stabilisierbar (Kaskade).According to the invention, the voltage on the second capacitor can be stabilized at any time by charging the first capacitor (cascade).

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung, deren beide Figuren jeweils einen Schaltplan wiedergeben.Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing, the two figures of which each represent a circuit diagram.

Ein "Transformer und Gleichrichter" G1 liefert die notwendige Spannung in Form von Halbwellen und den erforderlichen Strom für ein Kaskaden-Netzgerät 10. Die Leistung des Gleichrichters G1 reicht aus, um auch bei voller Last einen ersten Kondensator C1 auf die maximale Ladespannung Umax aufzuladen, die vorzugsweise zwischen dem 2- bis 2/3-fachen der Ausgangsspannung Uout liegt. Damit wird der Kondensator C1 als oberes Niveau der Kaskade geladen. Bei großer Last wird die Dauer der Aufladung -- bedingt durch den großen Spannungsabfall am Kondensator C1 während einer Halbwelle -- verlängert. Dank dieser Gegebenheiten wird der "Transformer und Gleichrichter" G1 zwar länger belastet, jedoch weniger stark. Der Strom fließt homogener, und der "Transformer und Gleichrichter" G1 kann deshalb kleiner dimensioniert werden.A "transformer and rectifier" G1 supplies the necessary voltage in the form of half-waves and the required current for a cascade power supply unit 10. The power of the rectifier G1 is sufficient to charge a first capacitor C1 to the maximum charging voltage Umax even under full load, which is preferably between 2 to 2/3 times the output voltage Uout. The capacitor C1 is thus charged as the upper level of the cascade. When the load is high, the duration of the charging is extended due to the large voltage drop across capacitor C1 during a half-wave. Thanks to these conditions, the "transformer and rectifier" G1 is loaded longer, but less heavily. The current flows more homogeneously and the "transformer and rectifier" G1 can therefore be dimensioned smaller.

Der Kondensator C1 hat eine ausreichende Kapazität, um bei Entnahme des maximalen Stromes Imax am Ausgang des Netzgerätes die Spannung am Kondensator C1 während des O-Durchganges der Speisespannung nicht unter einen Minimalwert abfallen zu lassen. Dieser Minimalwert liegt höher als die Ausgangsspannung des Netzgerätes 10. Die Kapazität des Kondensators C1 soll nicht größer sein als unbedingt notwendig, damit die Spannungsschwankungen am Kondensator C1 -- die auch wesentlich von einem Widerstand R1 abhängen -- bei voller Last groß sind; durch diese Spannungsschwankungen wird bei voller Last der "Transformer und Gleichrichter" G1 länger und somit homogener belastet. Die Spannungsschwankungen müssen aber innerhalb der Toleranzgrenze des gewählten Kondensatortyps liegen.The capacitor C1 has a sufficient capacity so that when the maximum current Imax at the output of the power supply is drawn, the voltage at the capacitor C1 does not drop below a minimum value during the O-passage of the supply voltage. This minimum value is higher than the output voltage of the power supply unit 10. The capacitance of the capacitor C1 should not be greater than absolutely necessary so that the voltage fluctuations on the capacitor C1 - which also depend essentially on a resistor R1 - are large at full load; due to these voltage fluctuations, the "transformer and rectifier" G1 is loaded longer and thus more homogeneously at full load. However, the voltage fluctuations must be within the tolerance limit of the selected capacitor type.

Ein Transistor T (Kaskade), vorzugsweise ein Feldeffekt-Transistor FET, dessen Gate durch eine dünne Oxidschicht gegen den Stromkanal isoliert ist (MOS-FET = metal-oxid-silicon), kontrolliert die Ladung und damit die Spannung an einem zweiten Kondensator C2 (unterer Teil der Kaskade). Am Gate des Transistors T ist eine unabhängige Referenzspannung Uref angeschlossen. Die Spannungdifferenz zwischen der am Gate angelegten Referenzspannung und der Spannung am zweiten Kondensator C2 steuert den Strom des Transistors T für das Nachladen des zweiten Kondensators C2. Die Öffnung des Transistors T entsteht durch den kleinen Spannungsabfall am zweiten Kondensator C2 bezüglich der Referenzspannung, nicht aber durch eine Rückkoppelung zum Gate. Der Strom des Transistors T wird möglichst direkt aus dem "Transformer und Gleichrichter" G1 abgeleitet - ausgenommen während des O-Durchganges der Speisespannung, während dessen er einzig aus dem ersten Kondensator C1 entnommen wird. Im Rahmen der Empfindlichkeit des gewählten Transistors T, vorzugsweise des FET, wird die Spannung am zweiten Kondensator C2 in einem für den Audioverstärkerbetrieb ausreichend engen Spannungsbereich stabilisert.A transistor T (cascade), preferably a field effect transistor FET, the gate of which is insulated from the current channel by a thin oxide layer (MOS-FET = metal-oxide-silicon), controls the charge and thus the voltage across a second capacitor C2 ( lower part of the cascade). An independent reference voltage Uref is connected to the gate of transistor T. The voltage difference between the reference voltage applied to the gate and the voltage across the second capacitor C2 controls the current of the transistor T for recharging the second capacitor C2. The opening of the transistor T is caused by the small voltage drop across the second capacitor C2 with respect to the reference voltage, but not by a feedback to the gate. The current of the transistor T is derived as directly as possible from the "transformer and rectifier" G1 - except during the O-passage of the supply voltage, during which it is only taken from the first capacitor C1. In the context of the sensitivity of the selected transistor T, preferably the FET, the voltage at the second capacitor C2 is stabilized in a voltage range which is sufficiently narrow for audio amplifier operation.

Die unabhängige Referenzspannung Uref wird von einem gesonderten Transformer und Gleichrichter G2 generiert. Vorzugsweise wird ein stabilisiertes Netzgerät verwendet, da die Stabilität der Ausgangsspannung wesentlich von derjenigen der Referenzspannung abhängt. Da die Referenzspannung am Gate des Transistors T nie stark belastet wird, ändert sie sich auch bei extremen Lasten (Kurzschluß) am Ausgang des KaskadenNetzgerätes 10 nicht. Daher kehrt die Ausgangsspannung auch nach kurzfrist extremer Last sofort und ohne Schwingungen zum Sollwert zurück.The independent reference voltage Uref is generated by a separate transformer and rectifier G2. A stabilized power supply unit is preferably used, since the stability of the output voltage essentially depends on that of the reference voltage. Since the reference voltage at the gate of the transistor T is never heavily loaded, it does not change even under extreme loads (short circuit) at the output of the cascade power supply 10. Therefore, the output voltage returns to the setpoint immediately and without vibrations even after a short-term extreme load.

Der oben erwähnte Widerstand R1 hat zwei Aufgaben; erstens vergrößert er die Spannungsschwankungen am Kondensator C1 und zweitens limitiert er den Strom durch den Transistor T und verhindert dessen Zerstörung. Ein zu großer Widerstand vergrößert auch die Verlustleistung und ist deshalb zu vermeiden. Jederzeit muß der mögliche Ladestrom für den Kondensator C2, der durch den Widerstand R1 begrenzt ist, größer sein als der maximale Strom, der vom Netzteil 10 verlangt wird.The resistor R1 mentioned above has two functions; firstly, it increases the voltage fluctuations on capacitor C1 and secondly, it limits the current through transistor T and prevents its destruction. Too much resistance also increases the power loss and should therefore be avoided. At any time, the possible charging current for the capacitor C2, which is limited by the resistor R1, must be greater than the maximum current required by the power supply 10.

Der zweite Kondensator oder Ausgangs-Kondensator C2 ist aus dem "Transformer und Gleichrichter" G1 und dem Kondensor C1 über den Transistor T ladbar. Seine Kapazität puffert kurze Stromspitzen sowie hochfrequenten Strombedarf ab. Damit wird auch die Trägheit der Regelschaltung, die leicht zu Phasenverschiebungen führen kann, bei allen Frequenzen aufgefangen. Bewährt haben sich Kapazitäten, die kleiner -- oder gleich --sind als -- oder aber gleich wie -- die des ersten Kondensators C1, die Zeit (R1*C1) sollte zwischen 0,5 und 5 Millisekunden liegen; dies bewirkt einen hohen Dämpungsfaktor in Audio-Verstärkern und eine große Spontaneität der Musik.The second capacitor or output capacitor C2 can be charged from the "transformer and rectifier" G1 and the capacitor C1 via the transistor T. Its capacity buffers short current peaks and high-frequency electricity requirements. This also compensates for the inertia of the control circuit, which can easily lead to phase shifts, at all frequencies. Capacities that are smaller - or equal - than - or else the same as - that of the first capacitor C1 have proven successful; the time (R1 * C1) should be between 0.5 and 5 milliseconds; this causes a high damping factor in audio amplifiers and a great spontaneity of the music.

Der wesentliche Vorteil des Zusammenspiels in der Kaskade der Kondensatoren C1 und C2 und des Transistors T bzw. des FET liegt darin, daß die Ladung für den Ausgangsstrom, insbesondere bei voller Last, weitgehend direkt vom Transformer her abgeleitet wird und nicht, wie in herkömmlichen Netzgeräten, in den Kondensatoren C1,C2 zwischengespeichert wird; die Kondensatoren C1,C2 werden nur kurzzeitig, inbesondere beim O-Durchgang und bei schnellen Laständerungen, stark belastet und haben Puffereigenschaften. Daher sind die Kondensatoren C1,C2 im Kaskaden-Netzgerät 10 auch viel kleiner dimensioniert als in herkömmlichen Netzgeräten.The main advantage of the interaction in the cascade of the capacitors C1 and C2 and the transistor T or the FET is that the charge for the output current, in particular at full load, is largely derived directly from the transformer and not, as in conventional power supplies , is temporarily stored in the capacitors C1, C2; the capacitors C1, C2 are only heavily loaded for a short time, in particular during O-passage and rapid load changes, and have buffer properties. The capacitors C1, C2 in the cascade power supply unit 10 are therefore also dimensioned much smaller than in conventional power supply units.

Das Aufstarten des Netzgerätes 10 kann durch einen in der Zeichnung nicht dargestellten Kondensator am Gate des Transistors T verlangsamt werden (z. B. auf 0,05 bis 1 sec). Damit werden die FET geschützt, und gleichzeitig wird die Stabilität der Ausgangsspannung erhöht.The start-up of the power supply 10 can be slowed down by a capacitor (not shown in the drawing) at the gate of the transistor T (for example to 0.05 to 1 sec). This protects the FET and at the same time increases the stability of the output voltage.

Mit der vorstehend beschriebenen Art der Stabilisierung bzw. Siebung kann bei 10 A Belastung eine Stabilität erhalten werden, die besser als +- 0,1 Volt auf 20 Volt Ausgangsspannung ist.With the type of stabilization or screening described above, a stability can be obtained at 10 A load, which is better than + - 0.1 volts to 20 volts output voltage.

Das erfindungsgemäße Ausführungsbeispiel der Fig. 2 zeigt eine Schaltung mit einem zweiten Widerstand R2 und einem zweiten Transistor T2 sowie einen Abschnitt für eine negative Uout, Kondensatoren C'1, C'2 und Widerständen R'1, R'2.2 shows a circuit with a second resistor R2 and a second transistor T2 and a section for a negative Uout, capacitors C'1, C'2 and resistors R'1, R'2.

Claims (9)

Vorrichtung (10) mit einem Netzgerät für Gleichspannung im Audiobereich, das einen den Strom für die Leistung liefernden Transformer und Gleichrichter (G1) aufweist sowie einen gesonderten zweiten Transformer und Gleichrichter (G2) zur Generierung einer Referenzspannung (Uref), mit welcher der Ladevorgang begrenzbar bzw. die Ausgangsspannung (Uout) des Netzgerätes (10) stabilisierbar ist.Device (10) with a power supply unit for DC voltage in the audio range, which has a transformer and rectifier (G1) supplying the current for the power, and a separate second transformer and rectifier (G2) for generating a reference voltage (Uref) with which the charging process can be limited or the output voltage (Uout) of the power supply (10) can be stabilized. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß den Gleichrichtern (G1, G2) ein erster Kondensator (C1) als oberes Niveau einer Kaskade zugeordnet und dieser vom ersten Gleichrichter (G1) ladbar sowie entsprechend der Differenz der Ausgangsspannung (Uout) zur Referenzspannung (Uref) des zweiten Gleichrichters (G2) entladbar ist.Device according to Claim 1, characterized in that the rectifiers (G1, G2) are assigned a first capacitor (C1) as the upper level of a cascade and can be charged by the first rectifier (G1) and according to the difference between the output voltage (Uout) and the reference voltage (Uref ) of the second rectifier (G2) can be discharged. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß vom ersten Kondensator (C1) aus ein zweiter Kondensator (C2) als unterer Teil der Kaskade höchstens bis zur Referenzspannung (Uref) ladbar ist.Device according to Claim 1 or 2, characterized in that a second capacitor (C2) as the lower part of the cascade can be charged from the first capacitor (C1) at most up to the reference voltage (Uref). Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der zweite Kondensator (C2) über einen Feldeffekt-Transistor (T) ladbar ist.Device according to Claim 3, characterized in that the second capacitor (C2) can be charged via a field effect transistor (T). Vorrichtung nach wenigstens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Ausgangsspannung (Uout) in jedem Frequenzbereich stabilisiert ist.Device according to at least one of claims 1 to 4, characterized in that the output voltage (Uout) is stabilized in every frequency range. Vorrichtung nach wenigstens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Spannung am zweiten Kondensator (C2) durch die Ladung des ersten Kondensators (C1) stabilisierbar ist.Device according to at least one of claims 1 to 5, characterized in that the voltage on the second capacitor (C2) can be stabilized by charging the first capacitor (C1). Vorrichtung nach einem der Ansprüche 1 bis 6, gekennzeichnet durch eine gegenüber der Ausgangsspannung (Uout) signifikant höhere Spannung am ersten Kondensator (C1).Device according to one of claims 1 to 6, characterized by a voltage at the first capacitor (C1) which is significantly higher than the output voltage (Uout). Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Spannung (Umax) des ersten Gleichrichters (G1) zwischen 2 und 2/3 mal der Ausgangsspannung (Uout) liegt.Device according to one of claims 1 to 7, characterized in that the voltage (Umax) of the first rectifier (G1) is between 2 and 2/3 times the output voltage (Uout). Vorrichtung nach einem der Ansprüche 1 bis 8, gekennzeichnet durch einen dem Gate des Transistors (t) zugeordneten Kondensator zum Verlangsamen des Aufstarters des Netzgerätes (10).Device according to one of claims 1 to 8, characterized by a capacitor assigned to the gate of the transistor (t) for slowing down the starter of the power supply (10).
EP93112380A 1992-08-06 1993-08-03 Regulated power supply for DC voltage Revoked EP0582263B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4226022 1992-08-06
DE4226022 1992-08-06

Publications (2)

Publication Number Publication Date
EP0582263A1 true EP0582263A1 (en) 1994-02-09
EP0582263B1 EP0582263B1 (en) 1996-06-05

Family

ID=6464984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93112380A Revoked EP0582263B1 (en) 1992-08-06 1993-08-03 Regulated power supply for DC voltage

Country Status (2)

Country Link
EP (1) EP0582263B1 (en)
DE (1) DE59302801D1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270158B (en) * 1961-04-19 1968-06-12 Fritz Hellige & Co G M B H Fab Circuit for stabilizing a supply voltage with protection against inrush current peaks
US3581187A (en) * 1969-06-23 1971-05-25 Metrodynamics Corp Regulated dc power supply
EP0399598A2 (en) * 1989-05-22 1990-11-28 Koninklijke Philips Electronics N.V. A.C. to D.C. converter
EP0462483A2 (en) * 1990-06-20 1991-12-27 Loewe Opta Gmbh Power supply circuit for a low-frequency amplifier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270158B (en) * 1961-04-19 1968-06-12 Fritz Hellige & Co G M B H Fab Circuit for stabilizing a supply voltage with protection against inrush current peaks
US3581187A (en) * 1969-06-23 1971-05-25 Metrodynamics Corp Regulated dc power supply
EP0399598A2 (en) * 1989-05-22 1990-11-28 Koninklijke Philips Electronics N.V. A.C. to D.C. converter
EP0462483A2 (en) * 1990-06-20 1991-12-27 Loewe Opta Gmbh Power supply circuit for a low-frequency amplifier

Also Published As

Publication number Publication date
EP0582263B1 (en) 1996-06-05
DE59302801D1 (en) 1996-07-11

Similar Documents

Publication Publication Date Title
DE69423488T2 (en) VOLTAGE REGULATOR
DE60028030T2 (en) Highly efficient electronic circuit for generating and regulating a supply voltage
DE3117009C2 (en)
DE3111776C2 (en) Stereo amplifier system
DE19882350B4 (en) DC-to-DC converter with set point control of output voltage - modifies set point of output voltage in response to transient or sudden load increase by amount related to magnitude of transient
DE19647329A1 (en) Integrated power factor correction circuit for step=up converter
DE10050496A1 (en) Direct voltage converter has switches connecting electrodes of charge pump capacitors not connected to output to intermediate stage outputs and/or to input voltage to maximize efficiency
DE3634979A1 (en) ARRANGEMENT FOR INCREASING THE OUTPUT PERFORMANCE OF A LOW VOLTAGE AMPLIFIER, IN PARTICULAR FOR CAR RADIOS
DE19818465C2 (en) Circuit arrangement for a charge pump and voltage regulator circuit with such a circuit arrangement
DE3932776A1 (en) POWER SUPPLY DEVICE WITH VOLTAGE CONTROL AND CURRENT LIMITATION
EP1249925A2 (en) DC/DC-converter
DE2617444A1 (en) STABILIZED POWER SUPPLY
DE69824751T2 (en) REGULATOR
DE2305291A1 (en) SIGNAL CONTROL CIRCUIT
DE4130576C1 (en)
DE3230467A1 (en) ELECTRONIC CIRCUIT WITH VARIABLE IMPEDANCE
EP0582263A1 (en) Regulated power supply for DC voltage
DE4021385A1 (en) Generation circuitry for two DC voltage supplies - has switched transformer with two output circuits having diodes and capacitors
DE4235048A1 (en) Mains connection unit for supplying DC voltage to audio equipment
DE102005005872A1 (en) Clocked power supply
EP1532726B1 (en) Switching controller
DE4007953C2 (en) DC-DC converter with switched capacitors
DE69508063T2 (en) Constant voltage drop voltage regulator
DE3213506C1 (en) Circuit arrangement with a differential amplifier
DE19623828A1 (en) Circuit arrangement for voltage reversal

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

RBV Designated contracting states (corrected)

Designated state(s): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19940805

17Q First examination report despatched

Effective date: 19940905

18D Application deemed to be withdrawn

Effective date: 19950316

D18D Application deemed to be withdrawn (deleted)
GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19960605

Ref country code: FR

Effective date: 19960605

REF Corresponds to:

Ref document number: 59302801

Country of ref document: DE

Date of ref document: 19960711

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960802

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960831

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960831

EN Fr: translation not filed
PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26 Opposition filed

Opponent name: INTERESSENGEMEINSCHAFT FUER RUNDFUNKSCHUTZRECHTE G

Effective date: 19970305

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970801

Year of fee payment: 5

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19971023

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980803

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980803

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990601

RDAH Patent revoked

Free format text: ORIGINAL CODE: EPIDOS REVO

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 20000108