Vladimir M Dvorkin, 723923 Woodcreek Ln, San Jose, CA 95117

6381471, Apr 30, 2002

Jun 30, 1999

09/343910

Vladimir A. Dvorkin - Castro Valley CA, 94552

H04M 100

455552, 455553, 455272, 343702

A dual band radio telephone with separate dual band, dual feed point transmit and receive antennas. The dual band radio telephone has two transceivers. Two feed points of the dual band, dual feed point receive antenna are coupled to respective receive branches of the two transceivers. Two feed points of the dual band, dual feed point transmit antenna are coupled to respective transmit branches of the two transceivers. Additionally, image reject band pass filters are coupled between the feed points of the dual band, dual feed point receive antenna and the respective receive branches. When the dual band, dual feed point transmit and receive antennas are spaced apart closely, the transmit branches comprise transmit filters coupled between transmit power amplifiers and the two feed points of the dual band transmit antenna.

6473600, Oct 29, 2002

Dec 13, 1999

09/459627

Vladimir A. Dvorkin - Castro Valley CA

Koninklijke Philips Electronics N.V.

H04B 102

455129, 455 91, 455101, 455127

A transmission portion of a front end for a portable communication device, in accordance with the present invention, includes a first transmission antenna coupled to a first output of a branching device for transmitting signals having a power below a threshold value. A power amplifier is coupled to a second output of the branching device. The power amplifier provides amplification to signals to be transmitted. A second transmission antenna is connected to an output of the power amplifier such that the power amplifier is switched off for transmission signals having a power below the threshold value and switched on to amplify transmission signals above the threshold value.

7103070, Sep 5, 2006

Dec 6, 2000

09/730679

Nabil Khalifa - Le Mans, FR
Serge Geslin - Le Mans, FR
Vladimir Dvorkin - Castro Valley CA, US

Koninklijke Philips Electronic, N.V. - Eindhoven

H04J 3/06

370503, 375140, 375150

This transmission system comprises a station of a first type and a plurality of stations of a second type which include a transmitting part having a transmit timing controller for transmitting data at a transmit timing and a receiving part having synchronizing circuits for synchronization with data transmitted from the station of the first type. When the stations of the second type are moving, their transmit timing is modified to facilitate the synchronization of the reception of the station by solely being based on the receive timing at these stations of the second type.

2013004, Feb 21, 2013

Dec 9, 2011

13/315654

Vladimir DVORKIN - Castro Valley CA, US

G01S 13/50

342 28

A system for producing an output signal representing movement of an object's surface has a continuous wave (CW) signal source for producing an CW signal directed at the object's surface. The CW signal is produced at a first frequency. A receiving element receives a signal reflected from the object's surface when the CW signal hits this surface. A down-converting frequency mixer converts the received signal into a signal of a second frequency lower than the first frequency. The frequency mixer is configured to produce an output signal representing an amplitude-modulated (AM) component of the received signal and having a parameter representing movement of the object's surface.

6249686, Jun 19, 2001

Dec 22, 1998

9/218547

Vladimir Dvorkin - Castro Valley CA
Michael G. Wong - Newark CA

Philips Electronics N.A. Corp. - New York NY

H04B 140

455552

An RF integrated circuit includes an improved control circuit for switching between at least two modes of operation, depending upon a characteristic of a signal received by the integrated circuit, the RF integrated circuit including a first input for receiving a first RF signal, when the integrated circuit is in a first mode; a second input for receiving a second input signal when the integrated circuit is in a second mode; and a detector on the integrated circuit couples to the first and second inputs for detecting the presence of the first and second RF signals, and producing an output signal at a logic port of the detector, depending on the state of the first and second RF signals; and a controller on the integrated circuit connected to the detector for switching the integrated circuit between the first mode and the second mode in response to the output signal without the need for the application of an external control signal to the integrated circuit.