Kirk T Su from Colorado Springs, CO, age 57

Us Patents

Providing Power To Powered Device Having Multiple Power Supply Inputs
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US Patent:

8581438, Nov 12, 2013
Filed:

Apr 13, 2010
Appl. No.:

12/759270
Inventors:

Jeffrey Lynn Heath - Santa Barbara CA, US
John Arthur Stineman - Carpinteria CA, US
Ryan Charles Huff - Santa Barbara CA, US
Kirk Tzukai Su - Santa Barbara CA, US
Assignee:

Linear Technology Corporation - Milpitas CA
International Classification:

H02J 1/10
US Classification:

307 43, 307 1, 307 2
Abstract:

A system for providing power to a load, having first and second power supply inputs respectively responsive to first and second input signals from first and second power supply sources to supply power to the load. For example, the first power supply input may be configured for supplying the load with power received from a communication link, such as an Ethernet link, and the second power supply input may be configured for supplying the load with power from an auxiliary power source. A power converter is provided to produce an output signal for supplying power to the load in response to the second input signal. The power converter is controlled to produce the output signal in accordance with a value of the first input signal.

Utilization Of Power Delivered To Powered Device During Detection And Classification Mode
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US Patent:

20060164098, Jul 27, 2006
Filed:

Jan 5, 2006
Appl. No.:

11/325319
Inventors:

Kirk Su - Santa Barbara CA, US
International Classification:

G01R 31/11
US Classification:

324534000
Abstract:

A powered device for receiving power from a power supply device over a communication link has operation support circuitry responsive to power provided by the power supply device in a detection or classification mode to enable the power supply device to operate in the detection or classification mode, and auxiliary circuitry configured for being powered by at least a portion of the power supplied in the detection or classification mode.

Adjusting Current Limit Thresholds Based On Power Requirement Of Powered Device In System For Providing Power Over Communication Link
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US Patent:

20060164769, Jul 27, 2006
Filed:

Oct 19, 2005
Appl. No.:

11/252567
Inventors:

Clayton Stanford - Summerland CA, US
Jeffrey Heath - Santa Barbara CA, US
Kirk Su - Santa Barbara CA, US
Harry Kleeburg - Goleta CA, US
International Classification:

H02H 3/26
G05F 1/10
H02H 9/02
H04L 12/28
US Classification:

361087000, 323234000, 361093100, 370395530
Abstract:

Novel system and methodology for adjusting a current limit threshold in a Power over Ethernet (PoE) system in accordance with requirements of a Powered Device (PD). A system for supplying power to a PD over a communications link has a requirement determining circuit for determining a PD's requirement, and a control circuit for setting a parameter restricting an output signal of the PSE in accordance with the determined PD's requirement. The control circuit may set a current limit threshold of the PSE and/or the PD in accordance with the determined PD's requirement, such as a power requirement.

Adjusting Current Limit Thresholds Based On Output Voltage Of Power Supply Device In System For Providing Power Over Communication Link
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US Patent:

20060164773, Jul 27, 2006
Filed:

Oct 19, 2005
Appl. No.:

11/252547
Inventors:

Clayton Stanford - Summerland CA, US
Jeffrey Heath - Santa Barbara CA, US
Kirk Su - Santa Barbara CA, US
Harry Kleeburg - Goleta CA, US
International Classification:

H02H 3/08
US Classification:

361093100
Abstract:

A power supply system for providing power over a communication link has current limit circuitry for restricting an output current of the system based on a current limit threshold, and threshold circuitry for setting the current limit threshold in accordance with an output parameter of the system. In particular, the threshold circuitry may control the current limit threshold in accordance with an output voltage of the system so as to achieve a substantially constant output power of the system.

System And Method For Supporting Operations Of Advanced Power Over Ethernet System
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US Patent:

20060212724, Sep 21, 2006
Filed:

Mar 15, 2005
Appl. No.:

11/079487
Inventors:

David Dwelley - Santa Barbara CA, US
Jeffrey Heath - Santa Barbara CA, US
John Stineman - Carpinteria CA, US
Jacob Herbold - Santa Barbara CA, US
Kirk Su - Santa Barbara CA, US
Clayton Stanford - Summerland CA, US
Harry Kleeburg - Goleta CA, US
Nevzat Kestelli - Goleta CA, US
International Classification:

G06F 1/00
US Classification:

713300000
Abstract:

A Power over Ethernet (PoE) system having a Power Sourcing Equipment (PSE) and a Powered Device (PD) configured for interacting over four pairs of wire provided for supplying power from the PSE to the PD. The PSE and the PD are configured to perform separate PD classification procedures over first and second 2-pair sets to support PoE operations that are not defined by the IEEE 802.3af standard.

Providing Power To Powered Device Having Multiple Power Supply Inputs
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US Patent:

20120303981, Nov 29, 2012
Filed:

Aug 6, 2012
Appl. No.:

13/567788
Inventors:

Jeffrey Lynn HEATH - Santa Barbara CA, US
John Arthur Stineman - Carpinteria CA, US
Ryan Charles Huff - Santa Barbara CA, US
Kirk Tzukai Su - Santa Barbara CA, US
International Classification:

G06F 1/26
US Classification:

713300
Abstract:

A system for providing power to a load, having first and second power supply inputs respectively responsive to first and second input signals from first and second power supply sources to supply power to the load. For example, the first power supply input may be configured for supplying the load with power received from a communication link, such as an Ethernet link, and the second power supply input may be configured for supplying the load with power from an auxiliary power source. A power converter is provided to produce an output signal for supplying power to the load in response to the second input signal. The power converter is controlled to produce the output signal in accordance with a value of the first input signal.

Active Bridge Rectification
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US Patent:

20130215657, Aug 22, 2013
Filed:

Feb 16, 2012
Appl. No.:

13/398046
Inventors:

Jeffrey Lynn Heath - Santa Barbara CA, US
Kirk Su - Santa Barbara CA, US
John Stineman - Carpinteria CA, US
International Classification:

H02M 7/217
US Classification:

363127
Abstract:

Technique for controlling a circuit that converts an AC input voltage into a DC output voltage using transistors arranged in first and second transistor pairs. Each transistor of the first pair is controlled in accordance with polarity of the AC input voltage. Each transistor of the second pair is controlled based on a difference between the AC input voltage and the DC output voltage.

Highly Configurable Capacitive Transducer Interface Circuit
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US Patent:

6731121, May 4, 2004
Filed:

Aug 19, 2002
Appl. No.:

10/110889
Inventors:

Ying Hsu - Huntington Beach CA
Christ Saunders - Laguna Niguel CA
Kirk Su - Irvine CA
Assignee:

Microsensors Corp. - Costa Mesa CA
International Classification:

G01R 2726
US Classification:

324678
Abstract:

A transducer interface circuit ( ) for use with a capacitive sensor ( ). The interface circuit ( ), provided on application specific IC, includes numerous trims and adjustments that permit it to operate with a differential, balanced-pair sensors ( A) or a singled-ended sensor ( ). In particular, the circuit ( ) provides a capacitive adjustment section ( ) and a capacitive trans-impedance amplifier section ( ) that are configured with capacitor adjustment controls ( ) and gain adjustment controls ( ) that, along with other controls, are provided as control registers. The capacitive trans-impedance amplifier section ( ) periodically reverses the voltages across the sensor ( ), and the capacitive adjustment section ( ), after blanking a feedback capacitance (CF) that is used to integrate excess charge caused by a difference in capacitance. A low pass filter section provides bandwidth adjustment without requiring any external components. An output buffer section ( ) includes further trim controls for gain and offset, is also governed by an offset selection bit SOFF that adjusts the output range to be optimally suited for the balanced-pair sensors ( A) or a singled-ended sensor ( B).