Patents by Inventor Aleksandr Gitsevich

Aleksandr Gitsevich has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6949887
    Abstract: An oscillator includes an amplifier having an input and an output, a feedback network connected between the input of the amplifier and the output of the amplifier, the feedback network being configured to provide suitable positive feedback from the output of the amplifier to the input of the amplifier to initiate and sustain an oscillating condition, and a tuning circuit connected to the input of the amplifier, wherein the tuning circuit is continuously variable and consists of solid state electrical components with no mechanically adjustable devices including a pair of diodes connected to each other at their respective cathodes with a control voltage connected at the junction of the diodes.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: September 27, 2005
    Assignee: Intel Corporation
    Inventors: Douglas A. Kirkpatrick, Aleksandr Gitsevich
  • Patent number: 6552620
    Abstract: An oscillator includes a solid state active device having an input and an output, a feedback circuit connected from the output of the active device to the input of the active device, the feedback circuit providing suitable positive feedback to initiate and sustain an oscillating condition at a fundamental frequency, and a waveform modifying circuit connected to the output of the active device, wherein the waveform modifying circuit is adapted to modify the waveform on the output in a manner which increases an efficiency of the oscillator. For example, the waveform modifying circuit comprises transmission lines and optionally components which provide a high impedance for odd harmonics of the fundamental frequency. The waveform modifying circuit may further include transmission lines and optionally components which provide a low impedance for even harmonics of the fundamental frequency.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: April 22, 2003
    Assignee: Fusion Lighting, Inc.
    Inventors: Aleksandr Gitsevich, Douglas A. Kirkpatrick, Donald A. MacLennan
  • Publication number: 20030001519
    Abstract: An integrated high brightness electrodeless lamp includes a lamp base defining two or more compartments housing components of the lamp, wherein at least one compartment provides an opening in the lamp base, a cover fitted to the lamp base, and an optics assembly positioned in the opening in the lamp base, wherein the lamp base, the cover, and the optics assembly provide an RF sealed system. The lamp components include an RF source providing RF energy for the lamp, an aperture bulb assembly including an electrodeless envelope containing a discharge forming fill which emits light when excited by RF energy, and an excitation structure for coupling RF energy from the RF source to the discharge forming fill. The optics assembly may be mounted in the opening in the lamp base with a twist lock mounting structure.
    Type: Application
    Filed: May 29, 2002
    Publication date: January 2, 2003
    Inventors: Douglas A. Kirkpatrick, Gary K. Bass, Jesse F. Copsey, Aleksandr Gitsevich, David Helsel, David W. Lawrence, Edward P. Rhyne, Stephen J. Sweeney, Peter Tsai
  • Publication number: 20020167282
    Abstract: An oscillator includes an amplifier having an input and an output, a feedback network connected between the input of the amplifier and the output of the amplifier, the feedback network being configured to provide suitable positive feedback from the output of the amplifier to the input of the amplifier to initiate and sustain an oscillating condition, and a tuning circuit connected to the input of the amplifier, wherein the tuning circuit is continuously variable and consists of solid state electrical components with no mechanically adjustable devices including a pair of diodes connected to each other at their respective cathodes with a control voltage connected at the junction of the diodes.
    Type: Application
    Filed: October 12, 2001
    Publication date: November 14, 2002
    Inventors: Douglas A. Kirkpatrick, Aleksandr Gitsevich
  • Publication number: 20020079845
    Abstract: An ultra bright, low wattage inductively coupled electrodeless aperture lamp is powered by a solid state RF source in the range of several tens to several hundreds of watts at various frequencies in the range of 400 to 900 MHz. Numerous novel lamp circuits and components are disclosed including a wedding ring shaped coil having one axial and one radial lead, a high accuracy capacitor stack, a high thermal conductivity aperture cup and various other aperture bulb configurations, a coaxial capacitor arrangement, and an integrated coil and capacitor assembly. Numerous novel RF circuits are also disclosed including a high power oscillator circuit with reduced complexity resonant pole configuration, parallel RF power FET transistors with soft gate switching, a continuously variable frequency tuning circuit, a six port directional coupler, an impedance switching RF source, and an RF source with controlled frequency-load characteristics.
    Type: Application
    Filed: February 6, 2001
    Publication date: June 27, 2002
    Inventors: Douglas A. Kirkpatrick, Gary K. Bass, Jesse F. Copsey, Lauren E. Dymond, William E. Garber, Aleksandr Gitsevich, William G. Grimm, Vincent H. Kwong, Izrail Levin, Donald A. MacLennan, Samuel A. Ola, James Proctor, Robert J. Roy, James E. Simpson, Paul E. Steiner, Peter Tsai, Brian P. Turner
  • Publication number: 20020050848
    Abstract: A voltage clamping circuit includes a PIN diode with a first end connected to a signal line, a capacitor connected between ground and a second end of the PIN diode; and a reference voltage applied to a junction of the PIN diode and the capacitor. Dual arrangements of the clamping circuit may be used to limit a voltage on the signal line within a desired range. The voltage clamping circuit is effective for protecting RF power transistors from overdrive conditions while operating at frequencies above 300 MHz and power levels in excess of 50 watts. The voltage clamping circuit has minimal adverse impact on circuit operation and efficiency. Specific examples include a power oscillator providing over 170 RF watts at above 700 MHz with the voltage clamping circuit providing protection from destructive feedback.
    Type: Application
    Filed: September 12, 2001
    Publication date: May 2, 2002
    Inventors: Aleksandr Gitsevich, Donald A. MacLennan
  • Publication number: 20020050865
    Abstract: An oscillator includes a solid state active device having an input and an output, a feedback circuit connected from the output of the active device to the input of the active device, the feedback circuit providing suitable positive feedback to initiate and sustain an oscillating condition at a fundamental frequency, and a waveform modifying circuit connected to the output of the active device, wherein the waveform modifying circuit is adapted to modify the waveform on the output in a manner which increases an efficiency of the oscillator. For example, the waveform modifying circuit comprises transmission lines and optionally components which provide a high impedance for odd harmonics of the fundamental frequency. The waveform modifying circuit may further include transmission lines and optionally components which provide a low impedance for even harmonics of the fundamental frequency.
    Type: Application
    Filed: September 12, 2001
    Publication date: May 2, 2002
    Inventors: Aleksandr Gitsevich, Douglas A. Kirkpatrick, Donald A. MacLennan
  • Patent number: 6313587
    Abstract: A high frequency inductively coupled electrodeless lamp includes an excitation coil with an effective electrical length which is less than one half wavelength of a driving frequency applied thereto, preferably much less. The driving frequency may be greater than 100 MHz and is preferably as high as 915 MHz. Preferably, the excitation coil is configured as a non-helical, semi-cylindrical conductive surface having less than one turn, in the general shape of a wedding ring. At high frequencies, the current in the coil forms two loops which are spaced apart and parallel to each other. Configured appropriately, the coil approximates a Helmholtz configuration. The lamp preferably utilizes an bulb encased in a reflective ceramic cup with a pre-formed aperture defined therethrough. The ceramic cup may include structural features to aid in alignment and I or a flanged face to aid in thermal management.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: November 6, 2001
    Assignee: Fusion Lighting, Inc.
    Inventors: Donald A. MacLennan, Lauren E. Dymond, Jr., Aleksandr Gitsevich, William G. Grimm, Kent Kipling, Douglas A. Kirkpatrick, Samuel A. Ola, James E. Simpson, William C. Trimble, Peter Tsai, Brian P. Turner
  • Patent number: 6310443
    Abstract: A jacketed lamp bulb envelope includes a ceramic cup having an open end and a partially closed end, the partially closed end defining an aperture, a lamp bulb positioned inside the ceramic cup abutting the aperture, and a reflective ceramic material at least partially covering a portion of the bulb not abutting the aperture. The reflective ceramic material may substantially fill an interior volume of the ceramic cup not occupied by the bulb. The ceramic cup may include a structural feature for aiding in alignment of the jacketed lamp bulb envelope in a lamp. The ceramic cup may include an external flange about a periphery thereof. One example of a jacketed lamp bulb envelope includes a ceramic cup having an open end and a closed end, a ceramic washer covering the open end of the ceramic cup, the washer defining an aperture therethrough, a lamp bulb positioned inside the ceramic cup abutting the aperture, and a reflective ceramic material filling an interior volume of the ceramic cup not occupied by the bulb.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: October 30, 2001
    Assignee: Fusion Lighting, Inc.
    Inventors: Donald A. MacLennan, Brian P. Turner, Aleksandr Gitsevich, Gary K. Bass, James T. Dolan, Kent Kipling, Douglas A. Kirkpatrick, Yongzhang Leng, Izrail Levin, Robert J. Roy, Bruce Shanks, Malcolm Smith, William C. Trimble, Peter Tsai
  • Patent number: 6225756
    Abstract: An oscillator includes an amplifier having an input and an output, and an impedance transformation network connected between the input of the amplifier and the output of the amplifier, wherein the impedance transformation network is configured to provide suitable positive feedback from the output of the amplifier to the input of the amplifier to initiate and sustain an oscillating condition, and wherein the impedance transformation network is configured to protect the input of the amplifier from a destructive feedback signal. One example of the oscillator is a single active element device capable of providing over 70 watts of power at over 70% efficiency. Various control circuits may be employed to match the driving frequency of the oscillator to a plurality of tuning states of the lamp.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: May 1, 2001
    Assignee: Fusion Lighting, Inc.
    Inventor: Aleksandr Gitsevich