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Pawel M Gradzki

from Bethesda, MD
Age ~65
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Also known as:
Pawel M Gradzka, Pawel I
Phone and address:
8400 River Rock Ter, Bethesda, MD 20817
(301) 320-3641
Connected to:
Michael A Gradzki, 41Stephen K Graebe, 74Christopher H Graebener, 39David B Graebel, 33Jean T Graebener, 70Kevin J Graebel, 43William P Graebel, 92Dianne T Graeber, 77Gladys Graeber, 42Loena E Graeber, 47

Pawel Gradzki Phones & Addresses

  • 8400 River Rock Ter, Bethesda, MD 20817 (301) 320-3641
  • 8153 Inverness Ridge Rd, Potomac, MD 20854 (301) 299-1657
  • 10953 Deborah Ct, Potomac, MD 20854 (301) 299-1657
  • Lebanon, NJ
  • 85 Viscount Dr, Milford, CT 06460 (203) 877-7564

Work

Position: Construction and Extraction Occupations

Education

Degree: Associate degree or higher

Resumes

Resumes

Pawel Gradzki Photo 1

Pawel Gradzki

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Pawel Gradzki Photo 2

Principal Engineer At Texas Instruments

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Position:
Principal Engineer at Texas Instruments
Location:
Washington D.C. Metro Area
Industry:
Semiconductors
Work:
Texas Instruments
Principal Engineer

Business Records

Name / Title
Company / Classification
Phones & Addresses
Pawel Gradzki
Gradzki Holdings, LLC
Holding Company
8400 Riv Rock Ter, Bethesda, MD 20817
(301) 320-3641

Publications

Us Patents

Driving Scheme For Bipolar Transistors

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US Patent:
6377087, Apr 23, 2002
Filed:
Jun 17, 1996
Appl. No.:
08/664627
Inventors:
Pawel M. Gradzki - Milford CT
Assignee:
U.S. Philips Corporation - New York NY
International Classification:
G11C 800
US Classification:
327110, 327112
Abstract:
A driving circuit for bipolar transistors having a control voltage device for producing a control voltage associated with each transistor. A tertiary winding, serving as the base winding for the bipolar transistors, supplies current to the base of each bipolar transistor based on the associated control voltage. Separate feedback circuits associated with each transistor carry a feedback signal reflecting the minority carrier charge stored in the associated transistor. The control voltage associated with each transistor varies based on the associated feedback signal.

Discharge Lamp Dc Ballast Employing Only Passive Components

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US Patent:
6504314, Jan 7, 2003
Filed:
Nov 10, 1997
Appl. No.:
08/967680
Inventors:
Pawel M. Gradzki - Potomac MD
Ulrich Böke - Geilenkirchen, DE
Hubert Raets - Landgraaf, NL
Johannes A. A. Wijntjes - Waalre, NL
Assignee:
Koninklijke Philips Electronics N.V. - Eindhoven
International Classification:
H05B 3702
US Classification:
315224, 315209 R
Abstract:
A circuit arrangement for supplying a lamp with a DC lamp current and comprising only passive components and equipped with mains input terminals for connection to the poles of an AC supply voltage source. A rectifying apparatus has two input terminals coupled to the mains input terminals and two output terminals for generating a DC voltage from the low frequency AC supply voltage. A ballast capacitor is coupled between the mains input terminals and the output terminals of the rectifying apparatus. A load circuit is coupled to the output terminals of the rectifying apparatus and has terminals for connection to the lamp. The load circuit includes a series arrangement of only passive components which connect the output terminals of the rectifying apparatus and comprise an inductor and the terminals for connection to the lamp. The circuit arrangement is simple and inexpensive and is very suitable for operating a discharge lamp and for incorporation into a compact lamp.

Ballast Dimmer With Passive Power Feedback Control

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US Patent:
59177179, Jun 29, 1999
Filed:
Jul 31, 1997
Appl. No.:
8/903567
Inventors:
Paulus P. B. Arts - Eindhoven, NL
Everaard M. J. Aendekerk - Eindhoven, NL
Machiel A. M. Hendrix - Eindhoven, NL
Pawel M. Gradzki - Milford CT
Jerzy Janczak - Woodhaven NY
Assignee:
U.S. Philips Corporation - New York NY
International Classification:
H02J 300
H02M 545
G05F 100
US Classification:
363 34
Abstract:
A circuit arrangement for the high-frequency operation of a discharge lamp comprises a first rectifying circuit (D1-D4) for generating a DC voltage across a first capacitor (C1) from a low-frequency supply voltage. A DC/AC converter (IV) for generating a high-frequency AC voltage at a frequency f from the DC voltage is coupled to a load branch (B) provided with coupling means (T3, T4) for coupling the discharge lamp (Li) to the load branch. The load branch connects a junction point N1 of the DC/AC converter to a junction point N2 between the first rectifying circuit and the first capacitor. A second rectifying circuit for converting a high-frequency voltage generated by the DC/AC converter into a DC voltage is coupled to the first capacitor and to a junction point N3 in the load branch. A control circuit controls the power consumed by the discharge lamp through variation of the frequency f. The coupling means are connected between the junction point N2 and the junction point N3 in the load branch.

Switched-Mode Power Supply Having A Circuit Arrangement For Turning The Switching Device When A Voltage On The Switching Device Is At A Minimum

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US Patent:
59868970, Nov 16, 1999
Filed:
Jun 29, 1998
Appl. No.:
9/107188
Inventors:
Navid Majid - Mohegan Lake NY
Pawel M. Gradzki - Potomac MD
Assignee:
Philips Electronics North America Corporation - New York NY
International Classification:
H02M 3335
US Classification:
363 21
Abstract:
A circuit arrangement for use in a controller circuit of a switched mode power supply for turning on a power device in the switched-mode power supply when a voltage across the power device is at a minimum. The circuit arrangement includes circuitry for detecting when a change in the voltage across the power device is substantially zero, and for detecting when the voltage across the power device is less than a predetermined level. When these two criteria are met, the circuit arrangement generates a turn-on signal for the power device.

Circuit Arrangement For Operating A Discharge Lamp Including Real Power Sensing Using A Single Quadrant Multiplier

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US Patent:
59694823, Oct 19, 1999
Filed:
Nov 30, 1998
Appl. No.:
9/201046
Inventors:
Pawel M. Gradzki - Potomac MD
Assignee:
Philips Electronics North America Corporation - New York NY
International Classification:
G05F 100
US Classification:
315224
Abstract:
A circuit arrangement for supplying a controlled substantially constant level of electrical power to a discharge lamp in a load circuit includes a feedback loop responsive to a comparison or difference between a power measure signal corresponding to electrical power consumed by the lamp and a reference signal corresponding to a desired consumed power. The power measure signal is formed by a power measure signal forming circuit which includes a one quadrant multiplier which receives at a pair of inputs respective lamp voltage and lamp current measure signals output from a sample and hold device arranged for sampling both a signal indicative of instantaneous lamp voltage and a signal indicative of instantaneous lamp current. The sampling is done at instants at which a signal which is indicative of the derivative of the lamp voltage passes through zero in a predetermined direction. The latter signal constitutes the current through a capacitor which is coupled at one end to a voltage that is indicative of the instantaneous lamp voltage and at the other end to a voltage clamp.

High Efficiency Dimmable Cold Cathode Fluorescent Lamp Ballast

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US Patent:
6011360, Jan 4, 2000
Filed:
Sep 18, 1997
Appl. No.:
8/932986
Inventors:
Pawel M. Gradzki - Milford CT
Ihor T. Wacyk - Briarcliff Manor NY
Assignee:
Philips Electronics North America Corporation - New York NY
International Classification:
H05B 3700
US Classification:
315244
Abstract:
A ballast including an inverter and a circuit having a resonant frequency coupled to the output of the inverter. In one embodiment of the invention, the only discrete type of element substantially affecting the resonant frequency is substantially inductive in electrical character. In this embodiment of the invention, there is also no discrete ballasting element in series with the lamp load. The reduction in discrete elements reduces both power consumption and costs associated with the ballast.

Triac Dimmable Compact Fluorescent Lamp With Low Power Factor

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US Patent:
6011357, Jan 4, 2000
Filed:
Apr 10, 1997
Appl. No.:
8/833888
Inventors:
Pawel M. Gradzki - Milford CT
Jerzy Janczak - Woodhaven NY
Assignee:
Philips Electronics North America Corporation - New York NY
International Classification:
H05B 3702
US Classification:
315224
Abstract:
A triac dimmable compact fluorescent lamp having a low power factor. A power feedback circuit coupled between the input and output stages of the lamp ballast creates sufficient current demand to sustain triac conduction at low dim levels. The power fed back from the output stage to the input stage, which includes a voltage doubler, reflects the voltage across the lamp.

Dimmable Compact Fluorescent Lamp

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US Patent:
60436115, Mar 28, 2000
Filed:
Apr 10, 1997
Appl. No.:
8/833866
Inventors:
Pawel M. Gradzki - Milford CT
Jerzy Janczak - Woodhaven NY
Assignee:
Philips Electronics North America Corporation - New York NY
International Classification:
H05B 3702
H05B 41392
US Classification:
315194
Abstract:
A compact flourescent lamp in which the level of illumination is controlled by a triac dimmer. Premature turn off of the triac dimmer is avoided through the serial combination of at least one resistor and at least one capacitor forming a snubber placed across the output of the electromagnetic interference filter of the compact flourescent lamp ballast. The snubber dampens oscillations generated within the compact flourescent lamp whereby sufficient power is drawn by the compact flourescent lamp to sustain conduction of the triac dimmer throughout the dimming range of the latter.
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Pawel M Gradzki from Bethesda, MD, age ~65 Get Report