DE59300495D1 - Circuit arrangement for generating an electrical voltage setpoint as a function of an electrical control voltage. - Google Patents
Circuit arrangement for generating an electrical voltage setpoint as a function of an electrical control voltage.Info
- Publication number
- DE59300495D1 DE59300495D1 DE59300495T DE59300495T DE59300495D1 DE 59300495 D1 DE59300495 D1 DE 59300495D1 DE 59300495 T DE59300495 T DE 59300495T DE 59300495 T DE59300495 T DE 59300495T DE 59300495 D1 DE59300495 D1 DE 59300495D1
- Authority
- DE
- Germany
- 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.)
- Expired - Fee Related
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)
- Oscillators With Electromechanical Resonators (AREA)
- Control Of Electrical Variables (AREA)
- Relay Circuits (AREA)
- Electrophonic Musical Instruments (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>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 (1)
Publication Number | Publication Date |
---|---|
DE59300495D1 true DE59300495D1 (en) | 1995-09-28 |
Family
ID=4201825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE59300495T Expired - Fee Related DE59300495D1 (en) | 1992-04-02 | 1993-03-24 | Circuit arrangement for generating an electrical voltage setpoint as a function of 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) |
Family Cites Families (3)
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 |
EP0350518B1 (en) * | 1988-07-12 | 1993-08-25 | Eppendorf-Netheler-Hinz Gmbh | Photometer |
US5038079A (en) * | 1989-12-11 | 1991-08-06 | North American Philips Corporation | Method for controlling fluorescent lamp dimmers and circuit for providing such control |
-
1992
- 1992-04-02 CH CH1073/92A patent/CH683462A5/en not_active IP Right Cessation
-
1993
- 1993-03-24 EP EP93104805A patent/EP0563765B1/en not_active Expired - Lifetime
- 1993-03-24 DE DE59300495T patent/DE59300495D1/en not_active Expired - Fee Related
- 1993-03-24 DK DK93104805.2T patent/DK0563765T3/en active
- 1993-03-24 AT AT93104805T patent/ATE126907T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0563765A3 (en) | 1993-12-08 |
ATE126907T1 (en) | 1995-09-15 |
DK0563765T3 (en) | 1995-12-27 |
CH683462A5 (en) | 1994-03-15 |
EP0563765A2 (en) | 1993-10-06 |
EP0563765B1 (en) | 1995-08-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |