Robert S Stengel, 76110 Half Moon Cir E-3 UNIT 110TH, Hypoluxo, FL 33462

6356149, Mar 12, 2002

Apr 10, 2000

09/546618

Robert E. Stengel - Pompano Beach FL
Wang-Chang Albert Gu - Scottsdale AZ

Motorola, Inc. - Schaumburg IL

H03F 368

330107, 330124 R, 333139

A tunable inductor circuit and phase tuning circuit utilizing a tunable inductor circuit for dynamically controlling signal phase delay in RF/Microwave Circuits and related applications. The tunable inductor includes an inductor and a voltage variable capacitor connected to each other. The tunable inductor and voltage variable capacitor can be connected to each other in parallel or in series. The phase tuning circuit includes at least one tunable inductor circuit and at least one voltage variable capacitor coupled to the at least one tunable inductor circuit, wherein the at least one tunable inductor circuit and the voltage variable capacitor are responsive to control signals to alter a tuning characteristic of the phase tuning circuit.

6373901, Apr 16, 2002

Apr 4, 1996

08/627537

Robert J. ODea - Ft. Lauderdale FL
Robert E. Stengel - Pompano Beach FL

Motorola, Inc. - Schaumburg IL

H04L 2503

375296, 375308, 332103, 332123, 332159

A modulated signal, having a varying magnitude signal envelope, is conditioned, such as to facilitate amplification ( ). Minimum values are determined values for portions of the signal envelope ( ), and a window expansion function applied to scale each portion of the signal envelope having a minimum value below a particular threshold, such that each scaled portion has a new minimum value of at least the particular threshold ( ).

6539344, Mar 25, 2003

Apr 21, 2000

09/553814

Robert E. Stengel - Pompano Beach FL
David E. Bockelman - Weston FL

Motorola, Inc. - Schaumburg IL

G06F 760

703 2, 703 14, 702 57, 716 4, 324612, 324638

A parameter extraction technique for an electrical structure is based on a definition of network parameters that isolates pure mode responses of the electrical structure, and that makes mode conversion responses of the electrical structure negligible. A set of network parameters is obtained that represents pure mode responses for the electrical structure ( ). These network parameters are processed to obtain model parameters that characterize each pure mode response ( ). Preferably, the mode specific parameters to combined to obtain mode independent parameters, such as coupling factor, propagation constant, and characteristic impedance values ( ).

6542270, Apr 1, 2003

Dec 8, 2000

09/733717

Matthew R. Perkins - Sunrise FL
Robert E. Stengel - Pompano Beach FL
Vernon A. Allen - Sunrise CA

Motorola, Inc. - Schaumburg IL

H04B 1000

359154, 359181, 359136

An interference-robust coded-modulation scheme for optical communications and a method for modulating illumination for optical communications include optical signal transmitters connected to signal multipliers. The signal to be transmitted is multiplied by a pseudo-random noise code and transmitted within the transmitter emissions. A receiver converts the received modulated light and correlates the received signal. An estimate of the signal to be transmitted is made by multiplying the received signal by the noise code and correlating such multiplication over the length of the code. A threshold switch outputs the correlation result to a bit estimator approximately when a deterministic peak of the output signal exceeds a threshold.

6556080, Apr 29, 2003

Dec 13, 2001

10/017985

Robert E. Stengel - Pompano Beach FL
Scott A. Olson - Davie FL

Motorola, Inc. - Schaumburg IL

H03F 100

330151, 330306

A feedforward amplifier and notch filter ( ) according to the present invention uses a direct coupling of an amplifier stage ( ) with the amplifiers load (R ). The main amplifier ( ) is coupled through a transmission line ( ) to the load. This direct coupled amplifier stage ( ) is driven by an signal that induces a very low impedance in parallel with the load at the receive frequency, but appears as an open circuit at the desired frequencies so that the desired signal from the main amplifier is virtually unaffected while output components at the receive frequency are cancelled.

6650185, Nov 18, 2003

Apr 26, 2002

10/133829

Robert Stengel - Pompano Beach FL
Scott Olson - Davie FL

Motorola, Inc - Schaumburg IL

H03F 360

330286, 330295

A frequency selective differential amplifier ( ) consistent with certain embodiments of the invention has a plurality of N amplifier stages ( through ) that collectively drive load ( ). The plurality of N amplifier stages ( ) have input nodes and output nodes. A plurality of N-1 output phase shift circuits ( ) connect the output nodes of the plurality of amplifier stages in a manner that causes output signals from the plurality of output nodes to add together for delivery to the load ( ), the plurality of output phase shift circuits ( ) have a plurality of phase shifts of (f)={(f) ; (f) ;. . . ; (f) }. A plurality of N-1 input phase shift circuits ( through ) are coupled to the plurality of input nodes and provide input signals thereto. The plurality of input phase shift circuits ( ) have a plurality of phase shifts of (f)={ (f) ; (f) ;. . . ; (f) }. To achieve the frequency selectivity of the current invention, (f) is not equal to (f), so that output signals from the plurality of N amplifier stages ( ) are added with a frequency dependent phase relationship.

6667659, Dec 23, 2003

Feb 28, 2002

10/085544

Robert Stengel - Pompano Beach FL
Bruce Thompson - Boca Raton FL

Motorola, Inc. - Schaumburg IL

H03F 360

330286, 330295

A distributed amplifier arrangement ( ) is provided in which a plurality of input signals (S (t),. . . S (t)) are separately controlled by a drive generator circuit ( ) to produce modulation of a virtual load impedance at each amplifier stage. This permits each stage ( ) of the distributed amplifier ( ) to operate at maximum efficiency by permitting the stage to produce an output voltage that approaches the supply voltage. As the output power is reduced, efficiency is maintained by systematically reducing the number of stages contributing to the output to the load.

6674329, Jan 6, 2004

Jun 27, 2002

10/184504

Robert Stengel - Pompano Beach FL
Nicholas Giovanni Cafaro - Coconut Creek FL

Motorola, Inc. - Schaumburg IL

H03F 360

330286, 330295, 330306

A distributed amplifier consistent with certain embodiments of the present invention has a plurality of amplifier sections through N ( ) with each amplifier section having an input and an output. A plurality of N input transmission line sections are connected in series, with inputs of the through N amplifier sections interconnected at their inputs along the series of input transmission line sections. A plurality of N output transmission line sections are also connected in series, with outputs of the through N amplifier sections interconnected at their outputs along the series of input transmission line sections. A load ( ) can be driven by an output at the Nth amplifier section ( ). A high-pass filter ( ) connects a dummy load ( ) to the output of the first amplifier section ( ). The input and output transmission line sections can, for example, be lumped element T sections and the high-pass filter can be made of a lumped element half section. To achieve the desired stability enhancement, the high pass filter section has a cutoff frequency equal to or greater than the cutoff frequency of the output transmission line sections.