Ronald M Crews

US Patent:

7643322, Jan 5, 2010

Filed:

Apr 25, 2007

Appl. No.:

11/740217

Inventors:

Craig Steven Varga - Chandler AZ, US
Ronald Milton Crews - Mesa AZ, US

Assignee:

National Semiconductor Corporation - Santa Clara CA

International Classification:

H02M 5/42

US Classification:

363 97, 307 66

Abstract:

A circuit for improving the regulation of a current or voltage output using a constant-on-time regulator. The circuit uses a dual sense loop design. One sense loop is used to adjust a reference signal or a sense signal. A second sense loop compares the adjusted reference signal to a sense signal or compares the adjusted sense signal to a reference signal. Accordingly, the use of dual sense loops may maintain more accurate output regulation while enabling an increased dynamic response to changes in output voltage or current.

US Patent:

51711737, Dec 15, 1992

Filed:

Jul 24, 1990

Appl. No.:

7/558156

Inventors:

William A. Henderson - Starkville MS
Ronald M. Crews - Tempe AZ

Assignee:

Zebco Corporation - Tulsa OK

International Classification:

B60L 1520

US Classification:

440 7

Abstract:

A servo controlled trolling motor steering system provides improved speed and steering control. The system includes apparatus for mounting the motor on a boat for rotation about an axis to effect steering of the boat. A foot pedal includes a base and a foot pad pivotally mounted to the base, the foot pad being pivotal by a user to command a desired steering direction. A membrane potentiometer senses rotational position of the motor to develop an electrical signal representative of the rotational position, the signal comprising a steering feedback signal. A second membrane potentiometer senses pivotal position of the foot pad relative to the base to develop an electrical signal representative of the pivotal position, the signal comprising a steering command signal. A steering control is mounted to the mounting apparatus for steering the trolling motor, including a servo driven gear set for rotating the trolling motor and an electrical control responsive to the steering command signal and the steering feedback signal for actuating the servo to rotate the trolling motor to steer the boat.