Lynn R Kern

US Patent:

6798578, Sep 28, 2004

Filed:

May 30, 2003

Appl. No.:

10/250051

Inventors:

Timothy R. Beystrum - Phoenix AZ
Michael J. Iosue - Phoenix AZ
Lynn Kern - Gilbert AZ

Assignee:

Litton Systems, Inc. - Los Angeles CA

International Classification:

G02B 2714

US Classification:

359630, 345 8, 345 9

Abstract:

A system (S) for combining multi-spectral images of a scene includes a first detector ( ) for transmitting a scene image in a first spectral band. A separate, second detector ( ) senses the scene in a second spectral band. The second detector ( ) has an image output that is representative of the scene. A transparent display ( ) mounted in the output viewing path ( ) of the first detector ( ) and displays a displayed image in the second spectral band. The image of the transparent display is aligned such that the image ( ) of the scene in the second spectral band combines with the image output ( ) in the first spectral band. The combined multi-spectral images ( ) are conveyed to an output ( ) for a user (U).

US Patent:

8054033, Nov 8, 2011

Filed:

Feb 26, 2009

Appl. No.:

12/393996

Inventors:

Lynn R. Kern - Tucson AZ, US
James P. McFarland - Tucson AZ, US

Assignee:

Standard Microsystems Corporation - Hauppauge NY

International Classification:

H02P 23/00

US Classification:

318811, 31840035, 31840005

Abstract:

A control method for a sensor-less, brushless, three-phase DC motor. A pulse-width modulation (PWM) duty cycle may be calculated. A voltage induced by rotation of a rotor may be sampled at a first expected zero crossing value to produce a first sampled voltage value. An average of a plurality of sampled voltage values, including voltage values sampled at a plurality of prior expected zero crossing values and the first sampled voltage value, may be calculated. The first sampled voltage value may be subtracted from the calculated average to produce a delta zero crossing error. The delta zero crossing error may be multiplied by a first constant representing electromechanical properties of the motor to produce a representation of an angular velocity. One or more time values may be generated based on the representation of the angular velocity. Operation of the motor may be controlled based on the one or more time values and the PWM duty cycle.

US Patent:

8237599, Aug 7, 2012

Filed:

Nov 30, 2009

Appl. No.:

12/627734

Inventors:

Joe A. Marrero - Tucson AZ, US
Lynn R. Kern - Tucson AZ, US
Scott C. McLeod - Oro Valley AZ, US

Assignee:

Standard Microsystems Corporation - Hauppauge NY

International Classification:

H03M 1/56

US Classification:

341169, 341116, 341122, 341155, 341170

Abstract:

System and method for digitizing analog voltage signals. A first voltage signal may be received at a comparator. A ramp signal may be received at the comparator. The ramp signal may be generated by a ramp generator. An output signal may be generated by the comparator. The output signal may indicate whether the analog voltage signal or the ramp signal is greater. The output signal may be conveyed to logic circuitry by the comparator. Control information may be conveyed by the logic circuitry to the ramp generator. The ramp generator may generate the ramp signal based on the control information. The logic circuitry may determine a digital representation of the first voltage signal based on the output signal from the comparator and the control information.

US Patent:

8241008, Aug 14, 2012

Filed:

Feb 26, 2009

Appl. No.:

12/393571

Inventors:

Chao-Ming Tsai - Tucson AZ, US
Lynn R. Kern - Tucson AZ, US

Assignee:

Standard Microsystems Corporation - Hauppauge NY

International Classification:

F04B 49/10
F04B 49/00

US Classification:

417 32, 417 22

Abstract:

A control circuit for controlling the rotational speed of a fan may include a memory element to store operating data corresponding to an operational profile of the fan defined by RPM (revolutions per minute) versus temperature, with the operating data comprising a respective temperature value and a respective RPM value for each respective operating point representing a change in slope of a function that corresponds to the operational profile of the fan. A processing unit may operate to receive a present temperature value, retrieve the operating data from the storage unit, and identify a pair of consecutive operating points such that the present temperature value is greater than a lower respective temperature value of the pair of consecutive operating points, and lower than a higher respective temperature value of the pair of consecutive operating points. The processing unit may calculate a desired RPM value corresponding to the present temperature value by performing linear interpolation between the pair of consecutive operating points, and output the desired RPM value to a closed-loop fan controller configured to control a rotational speed of the fan according at least to the desired RPM value.

US Patent:

8368334, Feb 5, 2013

Filed:

Nov 18, 2009

Appl. No.:

12/620726

Inventors:

Lynn R. Kern - Tucson AZ, US
Scott C. McLeod - Oro Valley AZ, US
Kenneth W. Gay - Tucson AZ, US

Assignee:

Standard Microsystems Corporation - Hauppauge NY

International Classification:

H02P 6/00

US Classification:

31840035, 31840032, 31840034, 318700

Abstract:

A control method for a brushless, three-phase DC motor. A voltage induced by rotation of a rotor may be sampled at a first expected zero crossing value to produce a first sampled voltage value. An average of a plurality of sampled voltage values, including voltage values sampled at a plurality of prior expected zero crossing values and the first sampled voltage value, may be calculated. The first sampled voltage value may be subtracted from the calculated average to produce a delta zero crossing error. A pulse-width modulation duty cycle may be adjusted based on the delta zero crossing error. The pulse-width modulation duty cycle may be used to control a rotational velocity of the rotor.

US Patent:

8378602, Feb 19, 2013

Filed:

Nov 18, 2009

Appl. No.:

12/620679

Inventors:

Lynn R. Kern - Tucson AZ, US

Assignee:

Standard Microsystems Corporation - Hauppauge NY

International Classification:

H02P 6/04

US Classification:

31840009, 31840001, 31840032, 318700

Abstract:

A system and method are presented for aligning a rotor in a motor. The motor may include the rotor and a plurality of pairs of electromagnets. One or more pairs of electromagnets may be excited at a first excitation level. The one or more pairs of electromagnets may be less than all of the plurality of pairs of electromagnets. The excitation of the one or more pairs of electromagnets may be increased to a second excitation level over a first period of time. The excitation of the one or more pairs of electromagnets may be decreased to a third excitation level over a second period of time. Exciting the one or more pairs of electromagnets, increasing the excitation, and decreasing the excitation may cause the rotor to stop in a known position.

US Patent:

8436564, May 7, 2013

Filed:

Sep 1, 2010

Appl. No.:

12/874187

Inventors:

Lynn R. Kern - Tucson AZ, US
Vadim Konradi - Austin TX, US

Assignee:

Standard Microsystems Corporation - Hauppauge NY

International Classification:

H02K 29/06

US Classification:

31840032, 31840001, 31840035, 31840036, 31840038, 318636

Abstract:

A control method for a sensor-less, brushless, three-phase DC motor. A pulse-width modulation (PWM) duty cycle may be calculated. A voltage induced by rotation of a rotor may be sampled at a first expected zero crossing value to produce a first sampled voltage value. An average of a plurality of sampled voltage values, including voltage values sampled at a plurality of prior expected zero crossing values and the first sampled voltage value, may be calculated. The first sampled voltage value may be subtracted from the calculated average to produce a delta zero crossing error (ZCE). The current value of an integral term corresponding to a rotational period may be updated according to the sign of the ZCE. The integral term may be updated periodically and multiple times during each rotational period. The ZCE may be subtracted from the integral term, and the resulting value may be used to generate one or more time values.

US Patent:

8487572, Jul 16, 2013

Filed:

Sep 28, 2011

Appl. No.:

13/246973

Inventors:

Lynn R. Kern - Tucson AZ, US
James P. McFarland - Tucson AZ, US

Assignee:

Standard Microsystems Corporation - Hauppauge NY

International Classification:

H02P 6/00

US Classification:

31840035, 318729, 318772

Abstract:

A control method for a brushless, three-phase DC motor. The motor may include a plurality of electromagnets and a rotor. A voltage induced by rotation of a rotor may be sampled at an expected zero crossing value to produce a first sampled voltage value. An average of a plurality of sampled voltage values, including voltage values sampled at a plurality of prior expected zero crossing values, may be calculated. A delta zero crossing error may be calculated. The delta zero crossing error may be calculated based on a difference between the first sampled voltage value and the calculated average. The plurality of electromagnets may be commutated. Commutation timing for the plurality of electromagnets may be determined based at least in part on the delta zero crossing error.