Kenneth H Webb

US Patent:

6775159, Aug 10, 2004

Filed:

Feb 21, 2002

Appl. No.:

10/080026

Inventors:

Kenneth F. Webb - Cedar Rapids IA
Jian Sun - Cedar Rapids IA

Assignee:

Rockwell Scientific Company, LLC. - Thousand Oaks CA

International Classification:

H02M 542

US Classification:

363 89

Abstract:

A converter circuit includes a magnetic core, a primary winding, a secondary winding, a main rectification circuit, and an auxiliary rectification circuit. The primary winding and the secondary winding are wound around the magnetic core. The main rectification circuit and the auxiliary rectification circuit are both connected to the secondary winding and produce output voltages having different magnitudes. The auxiliary voltage powers the control and drive circuits for both the primary switches and the synchronous rectifiers used for the main rectification circuit.

US Patent:

52010716, Apr 6, 1993

Filed:

Sep 26, 1990

Appl. No.:

7/589305

Inventors:

Kenneth F. Webb - Cedar Rapids IA

Assignee:

Rockwell International Corporation - Seal Beach CA

International Classification:

H04B 706

US Classification:

455101

Abstract:

The average RF power output of an independent sideband diversity radio transmitter, modulated by a multiple tone data signal, is increased while the RF output peak envelope voltage is held constant. For diversity operation the same information, as a combination of the data tones, is applied to both the upper and lower sideband channels of the RF translator. Adding predetermined phase shifts between the upper and lower sideband audio tone pairs results in a reduced peak envelope voltage at the composite RF output. The final RF amplifier gain can then be increased resulting in a higher average RF power output.