EP0563765A3 - Circuit for producing an electrical voltage reference value depending on an electrical control voltage - Google Patents

Circuit for producing an electrical voltage reference value depending on an electrical control voltage Download PDF

Info

Publication number
EP0563765A3
EP0563765A3 EP19930104805 EP93104805A EP0563765A3 EP 0563765 A3 EP0563765 A3 EP 0563765A3 EP 19930104805 EP19930104805 EP 19930104805 EP 93104805 A EP93104805 A EP 93104805A EP 0563765 A3 EP0563765 A3 EP 0563765A3
Authority
EP
European Patent Office
Prior art keywords
voltage
input
comparator
capacitor
output
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
EP19930104805
Other languages
German (de)
Other versions
EP0563765B1 (en
EP0563765A2 (en
Inventor
Fredy Kamber
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.)
STARKSTROM-ELEKTRONIK AG
STARKSTROM ELEKTRONIK AG
Original Assignee
STARKSTROM-ELEKTRONIK AG
STARKSTROM ELEKTRONIK 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 STARKSTROM-ELEKTRONIK AG, STARKSTROM ELEKTRONIK AG filed Critical STARKSTROM-ELEKTRONIK AG
Publication of EP0563765A2 publication Critical patent/EP0563765A2/en
Publication of EP0563765A3 publication Critical patent/EP0563765A3/en
Application granted granted Critical
Publication of EP0563765B1 publication Critical patent/EP0563765B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G05F1/462—Regulating voltage or current wherein the variable actually regulated by the final control device is dc as a function of the requirements of the load, e.g. delay, temperature, specific voltage/current characteristic
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/041—Controlling the light-intensity of the source
    • H05B39/042—Controlling the light-intensity of the source by measuring the incident light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Details Of Television Scanning (AREA)
  • Relay Circuits (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Control Of Electrical Variables (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

An RC section (12, 13) connected between feed lines (+, 0) is connected to the first input of a comparator (9). The second input of the comparator (9) is connected to a fixed voltage divider (10, 11). The output of the comparator (9) is connected to the first input via another resistor (16). The capacitor (13) of the RC section is charged up via the resistor (12) of the RC section until the voltage at the first input reaches the fixed voltage at the second input. The output of the comparator (9) then discharges the capacitor (13) via the further resistor (16) whereupon the capacitor (13) is charged up again. The periodic exponential capacitor voltage is supplied to the first input of a further comparator (7), at the second input of which the adjustable control voltage is present. When the voltages are equal, a voltage change occurs at the output of the comparator (7) which is transferred to a switching transistor (23) via an optocoupler (19). The signal present at its output and smoothed forms a voltage reference value which quasi-logarithmically depends on the settings of the control voltage and can be used, for example, for controlling the brightness of low-voltage gas discharge lamps. <IMAGE>
EP93104805A 1992-04-02 1993-03-24 Circuit for producing an electrical voltage reference value depending on an electrical control voltage Expired - Lifetime EP0563765B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1073/92 1992-04-02
CH1073/92A CH683462A5 (en) 1992-04-02 1992-04-02 A circuit arrangement for generating an electric voltage command value in dependence on an electrical control voltage.

Publications (3)

Publication Number Publication Date
EP0563765A2 EP0563765A2 (en) 1993-10-06
EP0563765A3 true EP0563765A3 (en) 1993-12-08
EP0563765B1 EP0563765B1 (en) 1995-08-23

Family

ID=4201825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104805A Expired - Lifetime EP0563765B1 (en) 1992-04-02 1993-03-24 Circuit for producing an electrical voltage reference value depending on an electrical control voltage

Country Status (5)

Country Link
EP (1) EP0563765B1 (en)
AT (1) ATE126907T1 (en)
CH (1) CH683462A5 (en)
DE (1) DE59300495D1 (en)
DK (1) DK0563765T3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3458801A (en) * 1967-06-01 1969-07-29 Itek Corp High voltage operational amplifier for use as an electronically controllable power supply regulator
EP0350518A1 (en) * 1988-07-12 1990-01-17 Eppendorf-Netheler-Hinz Gmbh Photometer
EP0432845A2 (en) * 1989-12-11 1991-06-19 Koninklijke Philips Electronics N.V. Method for controlling fluorescent lamp dimmers and circuit for providing such control

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3458801A (en) * 1967-06-01 1969-07-29 Itek Corp High voltage operational amplifier for use as an electronically controllable power supply regulator
EP0350518A1 (en) * 1988-07-12 1990-01-17 Eppendorf-Netheler-Hinz Gmbh Photometer
EP0432845A2 (en) * 1989-12-11 1991-06-19 Koninklijke Philips Electronics N.V. Method for controlling fluorescent lamp dimmers and circuit for providing such control

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"EXPONENTIAL DIMMING CHARACTERISTIC FOR LAMPS.", RESEARCH DISCLOSURE., MASON PUBLICATIONS, HAMPSHIRE., GB, no. 325., 1 May 1991 (1991-05-01), GB, pages 295., XP000229641, ISSN: 0374-4353 *
IBM TECHNICAL DISCLOSURE BULLETIN. Bd. 25, Nr. 11A, April 1983, NEW YORK US Seiten 5796 - 5797 D. BALLATORE 'CONSTANT VOLTAGE-RESISTIVE FEEDER FOR TELEPHONE LINE INTERFACE CIRCUITS.' *

Also Published As

Publication number Publication date
DK0563765T3 (en) 1995-12-27
EP0563765B1 (en) 1995-08-23
ATE126907T1 (en) 1995-09-15
DE59300495D1 (en) 1995-09-28
EP0563765A2 (en) 1993-10-06
CH683462A5 (en) 1994-03-15

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