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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Konopka; John G.
Address:
Barrington, IL
No. of patents:
38
Patents:












Patent Number Title Of Patent Date Issued
6100652 Ballast with starting circuit for high-intensity discharge lamps August 8, 2000
A ballast (10) for powering a discharge lamp (20) comprises an output circuit (300) and a lamp starting circuit (400). The output circuit (300) includes a resonant inductor (310), a resonant capacitor (312), and a direct current (DC) blocking capacitor (314). Lamp starting circuit (400)
5998930 Electronic ballast with two-step boost converter and method December 7, 1999
An electronic ballast (10) for fluorescent lamps includes a rectifier circuit (100), a boost converter (200), and an inverter (500). The boost converter (200) includes a boost control circuit (400) and a shifting circuit (300). The shifting circuit (300) provides filament preheating by
5994847 Electronic ballast with lamp current valley-fill power factor correction November 30, 1999
An electronic ballast (10) for powering at least one gas discharge lamp (30) includes a rectifier circuit (100), a line blocking rectifier (220), a bulk capacitor (240), an inverter (300), an output circuit (400), and a charging circuit (500). Charging circuit (500) is coupled between th
5982109 Electronic ballast with fault-protected series resonant output circuit November 9, 1999
An electronic ballast (100) for powering at least one gas discharge lamp (10) comprises an inverter (200) and an output circuit (300). Output circuit (300) comprises a resonant inductor (310), a resonant capacitor (330), a DC blocking capacitor (360), a first rectifier (350), and a s
5969481 Power supply and electronic ballast with high efficiency voltage converter October 19, 1999
An electronic power supply (10) comprising a rectifier circuit (100) and a voltage converter circuit (200). Voltage converter circuit (200) comprises a first inductor (220), a second inductor (230), an electronic switch (240), a control circuit (300), a first rectifier (250), a second
5872430 Single switch electronic ballast with low in-rush current February 16, 1999
An electronic ballast (200) includes a rectifier circuit (20), a clamp inductor (44), an electronic switch (62), a control circuit (60) for driving the electronic switch (62), an energy storage capacitor (34), a first diode (38), a second diode (50), a clamping capacitor (58), and an
5869937 High efficiency electronic ballast February 9, 1999
An electronic ballast (100) for powering at least one gas discharge lamp (10) comprises an inverter (300), an output circuit (400), and a switching circuit (500). Output circuit (400) includes a resonant inductor (440) and a resonant capacitor (460). Switching circuit (500) is coupled be
5834924 In-rush current reduction circuit for boost converters and electronic ballasts November 10, 1998
An electronic power supply circuit (50) that includes a rectifying circuit (14), a boost converter (16), an in-rush current reduction circuit (52), and a bulk capacitor (18). The in-rush current reduction circuit (52) includes an in-rush current limiting resistor (54) and a bypass capaci
5770925 Electronic ballast with inverter protection and relamping circuits June 23, 1998
An electronic ballast (10) for powering at least one gas discharge lamp (20) comprising an AC-to-DC converter (100), an inverter (200), an output circuit (300), a relamping circuit (400), and an inverter protection circuit (500). Protection circuit (500) shuts down the inverter (200) in
5767631 Power supply and electronic ballast with low-cost inverter bootstrap power source June 16, 1998
A power supply (10) for powering a load (500) includes an inverter (100), a series resonant output circuit (200), and a bootstrap power source (300) for supplying operating power to an inverter driver circuit (110). The bootstrap power source (300) is coupled in series with the load (500
5729098 Power supply and electronic ballast with a novel boost converter control circuit March 17, 1998
An electronic power supply (10) includes a boost converter (100) and an inverter (600). The inverter (600) includes a first inverter node (602) having a periodically varying voltage, and a second inverter node (604) having a voltage with a peak value that is proportional to the dc output
5694006 Single switch ballast with integrated power factor correction December 2, 1997
An electronic ballast (200) includes a rectifier circuit (20), an energy storage inductor (38), a power switch (58), a control circuit (50) for driving the power switch (58), a clamp diode (46), a voltage clamping capacitor (54), a bulk capacitor (34), and an output circuit (70) for
5691691 Power-line communication system using pulse transmission on the AC line November 25, 1997
A power-line communication system (10) for use with a conventional AC source (12) having a hot wire (14) and a neutral wire (16). The communication system (10) includes a pulse transmitter (16) and at least one receiver (18) connected downstream from the pulse transmitter (16). The p
5608292 Single transistor ballast with filament preheating March 4, 1997
A ballast circuit for driving a gas discharge having a source of pulsating and rectified AC (20), an energy storage circuit (30), a switch (40) that can have one end connected to an energy storage inductor and an opposite end that can be connected to circuit common; a control circuit (50
5586016 Circuit for quickly energizing electronic ballast December 17, 1996
An electronic ballast having a boot strap capacitor 22 that becomes initially charged at a first rate and a high voltage storage capacitor 23 that becomes charged at a second, faster rate, wherein the boot strap capacitor 22, becoming initially fully charged initiates operation of a
5574336 Flourescent lamp circuit employing a reset transistor coupled to a start-up circuit that in turn November 12, 1996
A circuit for powering a fluorescent lamp has a direct current power supply (10). An inverter (12) is coupled to the direct current power supply (10) and provides a lamp current to the fluorescent lamp load (14). The inverter(12) is connected to an inverter control circuit (18). A pr
5528147 Apparatus for detecting gas discharge lamp faults June 18, 1996
A capacitor (16) coupled in series with series coupled gas discharge lamps (11 and 12) will effectively block direct current from flowing through the capacitor (16). A detector circuit including a high impedance resistor (17) and transistor (18) provide an alternate path for a small dire
5528111 Ballast circuit for powering gas discharge lamp June 18, 1996
A ballast for providing a dimmable fluorescent lamp (42) has a potentiometer (46) connected to AC power source (10). The potentiometer (46) is connected to a dimming circuit (44). In response to changes in the resistance of the potentiometer (46), dimming circuit (44) causes the duty
5475285 Lamp circuit limited to a booster in which the power output decreases with increasing frequency December 12, 1995
A power supply circuit (100) for use in driving fluorescent lamps (102, 104, 106) has a current mode control voltage boost IC (144) which produces a boosted voltage and has a power control input (pin 3) and a frequency control input (pin 4). The lamps are driven by a self oscillating inv
5453665 Single transistor electronic ballast September 26, 1995
An electronic ballast 10 includes a single transistor 16 that supports both power factor correction and inverter functionality. To assist in controlling voltages across this transistor 16 during all phases of operation, two dual function diodes 21 and 19 are provided.
5434477 Circuit for powering a fluorescent lamp having a transistor common to both inverter and the boos July 18, 1995
A circuit with a transistor common to both the inverter and the boost converter powers a gas discharge lamp. In a half-bridge inverter, a boost inductor is coupled between the rectifier and the junction between two switching circuits.
5399944 Ballast circuit for driving gas discharge March 21, 1995
A circuit for powering gas discharge lamps includes a power factor correction inductor coupled to a source of rectified, pulsating AC power. An energy storage circuit is connected to the power factor correction inductor, and a switch is coupled to a junction between the power factor
5374875 High-power factor circuit for energizing gas discharge lamps December 20, 1994
A circuit for powering a gas discharge lamp from a source of a first frequency AC power has a a first rectifier for converting the first frequency AC power into a first DC power, a capacitor and driver for converting the DC power to a second frequency AC power. A second rectifier is
5373218 Toggle brightening circuit for powering gas discharge lamps and method for operating gas dischar December 13, 1994
A circuit (100) for powering fluorescent lamps (102, 104 & 106) includes a switch (50) having "open" and "closed" positions. When power is initially applied to the circuit, the lamps are powered at full power to enable them to "strike". After a short period, the power is reduced to the l
5194781 Control circuit March 16, 1993
A control circuit (C) for controlling fluorescent lamps (102, 104 & 106) from a switch (S) having "open" and "closed" positions. The circuit senses whether the switch is (i) open, (ii) closed within less than approximately 0.5 seconds of last being opened, or (iii) closed for the first t
5191263 Ballast circuit utilizing a boost to heat lamp filaments and to strike the lamps March 2, 1993
A driver circuit for one or more gas discharge lamps (102, 104, 106) includes: a self-oscillating, series-resonant oscillator (196, 198, 178, 180) for producing a constant-frequency, high-frequency output voltage for application to the lamps; an inductive voltage boost IC (144) for causi
5148087 Circuit for driving a gas discharge lamp load September 15, 1992
A circuit for driving one or more gas discharge lamps (102, 104, 106) from a nominal-level voltage supply includes: a voltage boost IC (144); a self-oscillating, series-resonant oscillator (196, 198, 178, 180) for producing a high-frequency output voltage for application to the lamps via
5144195 Circuit for driving at least one gas discharge lamp September 1, 1992
A driving circuit for one or more gas discharge lamps (102, 104, 106) having heatable filaments (102A&B, 104A&B, 106A&B) includes: a self-oscillating, series-resonant oscillator (196, 198, 178, 180) for producing a high-frequency output voltage for application to the lamps via an out
4967335 Saturable transformer regulator for flyback power supply October 30, 1990
A flyback type power supply has a nominal 12 volt secondary winding that is connected to a rectifier through the primary winding of a saturable transformer. The secondary winding of the saturable transformer is connected in series with the DC load current supplied by the rectifier. A
4937731 Power supply with automatic input voltage doubling June 26, 1990
An automatic input switching circuit for a power supply includes a transformer with two primary windings, normally connected in series and connectible in parallel by relay contacts for operation in a doubler mode. The secondary winding supplies a rectifier for developing a DC output
4916569 Short circuit protection for switch mode power supply April 10, 1990
A protection circuit for a switched mode power supply has a reference voltage applied through a resistor to a first input terminal of a comparator. The second input terminal of the comparator is supplied with an indicating voltage that is a function of the magnitude of input current
4906938 Power circuit locater March 6, 1990
A circuit locater includes a passive signal device adapted to be plugged into a power outlet to draw a large amplitude current pulse of very short duration (identification signal) from the power source supplying the outlet. A receiver has a pickup coil that senses the magnetic field
4885522 Constant current source and battery charger December 5, 1989
A constant current battery charger includes a bucking regulator comprising a power switch transistor, a diode, an inductor and a voltage sensitive switch with adjustable delay for controlling the power switch transistor. The hysteresis or delay is obtained with a Schmitt trigger and the
4862013 Constant current source and battery charger August 29, 1989
A constant current battery charger includes a bucking regulator comprising a power switch transistor, a diode, an inductor and a voltage sensitive switch with adjustable delay for controlling the power switch transistor. The hysteresis or delay is obtained with a Schmitt trigger and the
4856078 DC fan speed control August 8, 1989
A simple pulse width modulator speed control for a brushless DC "pancake" type fan motor utilizes a type 555 timer for driving a transistor switch, connected in series between the DC voltage supply and the fan motor, at about a 10 Hz rate. The duty cycle of the pulsed output of the timer
4829259 Constant current source and battery charger May 9, 1989
A constant current battery charger includes a bucking regulator comprising a power switch transistor, a diode, an inductor and a voltage sensitive switch with adjustable delay for controlling the power switch transistor. The hysteresis or delay is obtained with a Schmitt trigger and the
4805083 Low cost automatic voltage doubler switch February 14, 1989
An automatic voltage doubler switch includes a triac for converting a rectifier arrangement from a direct to a doubler mode of operation. Drive current for the triac is supplied by a resistor and capacitor circuit connected across one of the rectifiers in the bridge network. A self-b
4783729 Automatic voltage doubler switch November 8, 1988
An automatic voltage doubler switch includes a Triac having a gate electrode that is driven by a relaxation oscillator that includes a Diac switch. A capacitor, charged from a voltage that is indicative of the AC line voltage, triggers the Triac through the Diac switch to complete a










 
 
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