David G Swanson

US Patent:

7072778, Jul 4, 2006

Filed:

Jun 17, 2004

Appl. No.:

10/870252

Inventors:

David F. Swanson - Novi MI, US

Assignee:

STMicroelectronics, Inc. - Carrollton TX

International Classification:

G01R 25/00

US Classification:

702 57, 702 65

Abstract:

A method for determining a rotor position in a DC motor having a plurality of windings, including a rotor winding and a plurality of stator windings begins with producing a changing current flow in a pulsed winding to induce a response signal in other windings of the motor. The pulsed winding may be the rotor winding or selected ones of the stator windings. If the pulsed winding is the rotor winding, response signals induced in at least two of the stator windings are analyzed compute the rotor position. If the pulsed winding is the stator winding, response signals induced from pulsing at least two stator windings are sensed in the rotor winding and analyzed compute the rotor position. A system for computing a rotor position may include comparators for comparing induced response signals in stator windings.

US Patent:

57813906, Jul 14, 1998

Filed:

Dec 21, 1996

Appl. No.:

8/771644

Inventors:

Joseph Notaro - Northville MI
David Frank Swanson - Howell MI

Assignee:

SGS-Thomson Microelectronics, Inc. - Carrollton TX

International Classification:

H02H 318

US Classification:

361 84

Abstract:

An electrical power protection integrated circuit provides protection against reverse battery and overvoltage conditions that is particularly of value in automotive applications in which reverse battery and overvoltage conditions are commonplace. The electrical power protection integrated circuit device contains a reverse battery condition protection element, supplied either directly or indirectly from a battery power source, that protects against a reverse battery condition of the battery power source and an overvoltage protection element coupled to the reverse battery condition protection device that protects against an overvoltage condition of the battery power source and produces a protected power output that is isolated from both battery overvoltage and reverse battery voltage conditions. Additionally, the integrated circuit device can further produce an auxiliary protected power output that is isolated from reverse battery voltage conditions.

US Patent:

20140145666, May 29, 2014

Filed:

Oct 25, 2013

Appl. No.:

14/063163

Inventors:

- Coppell TX, US
David F. Swanson - Belleville MI, US

Assignee:

STMICROELECTRONICS, INC. - Coppell TX

International Classification:

H02P 7/00

US Classification:

318504

Abstract:

An integrated circuit is configured for controlling automobile door lock motors. The circuit includes half-bridge driver circuits, with each half-bridge driver circuit having an output node configured to be coupled to a door lock motor. A control circuit is configured to control driver operation of the half-bridge driver circuits. A current regulator circuit senses current sourced by or sunk by at least one of the half-bridge circuits. The control circuit responds to the current regulator circuit and the sensed current by controlling the driver operation to provide for a regulated current to be sourced by or sunk by said half-bridge circuit. The control circuit further controls the half-bridge driver circuits to enter a tri-state mode in order to support the making of BEMF measurements on the motor.