Scott C Olson

US Patent:

6556080, Apr 29, 2003

Filed:

Dec 13, 2001

Appl. No.:

10/017985

Inventors:

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

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H03F 100

US Classification:

330151, 330306

Abstract:

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.

US Patent:

6573792, Jun 3, 2003

Filed:

Dec 13, 2001

Appl. No.:

10/017984

Inventors:

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

Assignee:

Motorola, INC - Schaumburg IL

International Classification:

H03F 100

US Classification:

330151, 330 53, 330149

Abstract:

A feedforward amplifier ( ) 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 a signal that induces a very low impedance in parallel with the load to the error signal, but appears as an open circuit to the desired signal so that the desired signal from the main amplifier is substantially unaffected.

US Patent:

6650185, Nov 18, 2003

Filed:

Apr 26, 2002

Appl. No.:

10/133829

Inventors:

Robert Stengel - Pompano Beach FL
Scott Olson - Davie FL

Assignee:

Motorola, Inc - Schaumburg IL

International Classification:

H03F 360

US Classification:

330286, 330295

Abstract:

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.

US Patent:

6768378, Jul 27, 2004

Filed:

Dec 13, 2001

Appl. No.:

10/017986

Inventors:

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

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H03F 360

US Classification:

330 54, 330286

Abstract:

A radio frequency power amplifier circuit according to certain embodiments of the present invention uses a distributed radio frequency amplifier having a plurality of stages each with an input. The distributed radio frequency amplifier drives an output load, such as an antenna. A drive signal synthesizer , having a plurality of outputs, drives the plurality of inputs to the distributed amplifier. Changes in load impedance are measured, e. g. , using a directional coupler , and the measurement is used to change a drive signal produced by the drive signal synthesizer to compensate for the change in load impedance.

US Patent:

7102429, Sep 5, 2006

Filed:

Jun 28, 2002

Appl. No.:

10/184742

Inventors:

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

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H03G 3/20

US Classification:

330136, 330 10, 330302

Abstract:

A high efficiency amplifier arrangement consistent with certain embodiments of the invention has an amplifier () that receives an input signal and amplifies the input signal to produce an output signal that drives a load (). A variable impedance transformer () is disposed between the amplifier () and the load () to presents a varying load impedance to the output of the amplifier (). A control mechanism, such as a programmed processor (), controls the variable impedance transformer () with a control signal so that the load impedance seen by the amplifier () varies in accordance with an envelope of the input signal. The control signal varies the load impedance in a manner that keeps the output of the amplifier () near a peak value. The arrangement may further include a circuit for controlling a DC input bias () of the amplifier () to keep the amplifier () operating within a predetermined class of operation throughout a range of input signals. The control signal may be calculated, looked up in a lookup table () or derived from an envelope detector ().

US Patent:

7319870, Jan 15, 2008

Filed:

Dec 20, 2001

Appl. No.:

10/029107

Inventors:

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

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 7/20
G06Q 40/00

US Classification:

4554321, 705 1, 455 305, 455434, 370480, 370485

Abstract:

A method is provided for configuring a subscriber unit for operation in a wireless communications system. Information on available wireless services is advertised through well known, and publicly accessible, broadcast media, for the benefit of potential subscribers. A potential subscriber uses a subscriber unit to access the broadcast media and obtain a set of available wireless services (). The subscriber unit supplies a particular criteria related to one or more of the available wireless services to a brokering agent, and receives from the brokering agent a list of service providers meeting the criteria (). The subscriber unit then establishes a subscription relationship with a selected service provider, and self-configures to operate in a mode that supports interaction with the service provider ().

US Patent:

58923950, Apr 6, 1999

Filed:

May 2, 1997

Appl. No.:

8/850541

Inventors:

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

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H03F 368

US Classification:

330124R

Abstract:

An apparatus (100) uses power recovery from a combining circuit (125) to improve efficiency. A power combiner (125) generates multiple output signals (127, 133) from a combination of input signals (113, 114). One of the output signals from the power combiner is coupled to a power recovery circuit (135), and energy is recovered and preferably stored for later use.

US Patent:

55415547, Jul 30, 1996

Filed:

Mar 6, 1995

Appl. No.:

8/399019

Inventors:

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

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H03F 368
H03F 324

US Classification:

330 51

Abstract:

An amplifier (100) has first and second operation modes. The amplifier (100) includes an amplifier input portion (110) and an amplification gain stage. The amplification stage has two gain paths (120, 140) coupled in parallel to the amplifier input portion (110). At least one of the gain paths (120) has an amplification component (121) that in part forms a switch to select between the first and second operation modes.