Resumes
Resumes
Timothy Herklots Phones & Addresses
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1230 N Winchester Blvd, Santa Clara, CA 95050 (408) 246-1575
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10265 Blaney Ave, Cupertino, CA 95014
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2120 Briarwood Dr, San Jose, CA 95125
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2863 Canyon Creek Ct, Gilbert, AZ 85233
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2963 E Canyon Creek Ct, Gilbert, AZ 85295
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Saratoga, CA
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Maricopa, AZ
Publications
Us Patents
Color Correcting Device Driver
View pageUS Patent:
8575863, Nov 5, 2013
Filed:
Nov 8, 2011
Appl. No.:
13/291943
Inventors:
Charles Cai - San Jose CA, US
Jeff Kotowski - Nevada City CA, US
Timothy James Herklots - Cupertino CA, US
Jeff Kotowski - Nevada City CA, US
Timothy James Herklots - Cupertino CA, US
Assignee:
Atmel Corporation - San Jose CA
International Classification:
G05F 1/00
H05B 37/02
H05B 39/04
H05B 41/36
H05B 37/02
H05B 39/04
H05B 41/36
US Classification:
315307, 315247, 315224, 315185 S, 315312
Abstract:
A color correcting device driver is configured to vary the equivalent current into light emitting elements (e. g. , LEDs) with the frequency of the AC input current (e. g. , 120 Hz). In implementations that include a fly-back controller with a power factor correction (PFC) controller on the primary side, the color correcting device driver performs the method of: 1) turning on the loads (e. g. , white and CA strings of LEDs); 2) determining if the voltage supplied to the loads has dropped by a first threshold amount; 3) turning off the loads; and 4) determining if the voltage supplied to loads has recovered by a second threshold amount (or waiting for a fixed amount of time). The method is repeated. In implementations that do not include a PFC controller on the primary side, the color correcting device driver can create a pulse width modulated (PWM) signal.
Self-Power For Device Driver
View pageUS Patent:
8604699, Dec 10, 2013
Filed:
Dec 7, 2011
Appl. No.:
13/314069
Inventors:
Jeff Kotowski - Nevada City CA, US
Timothy James Herklots - Cupertino CA, US
Charles Cai - San Jose CA, US
Timothy James Herklots - Cupertino CA, US
Charles Cai - San Jose CA, US
Assignee:
Atmel Corporation - San Jose CA
International Classification:
H05B 37/02
US Classification:
315122, 315297, 315307, 315193
Abstract:
The disclosed implementations utilize the voltage drop inherent in the device string to power a device control IC. In some implementations, current is drawn from the bottom of the device string and applied to a voltage supply pin of the device control IC. In some implementations, current is drawn from some other location in the device string (e. g. , near the bottom or midpoint of the device string) using a switch. In some implementations, current is drawn from near the bottom and the bottom of the device string at different times, such that less current is drawn from the bottom of the device string as the duty cycle of the device string increases and more current is drawn from near the bottom of the device string as the duty cycle of the device string increases.
Multiple Function Switching Regulator For Use In Mobile Electronic Devices
View pageUS Patent:
20090174366, Jul 9, 2009
Filed:
Jan 9, 2008
Appl. No.:
11/971795
Inventors:
Baher A. Ahmad - Gilbert AZ, US
Timothy J. Herklots - Tempe AZ, US
Jan Krellner - Chandler AZ, US
Timothy J. Herklots - Tempe AZ, US
Jan Krellner - Chandler AZ, US
Assignee:
FREESCALE SEMICONDUCTOR, INC. - Austin TX
International Classification:
H02J 7/04
H02J 7/00
H02J 7/00
US Classification:
320114
Abstract:
Multiple Function Switching Regulator for Use in Mobile Electronic Devices A mobile electronic device operable to employ a rechargeable battery as a power source includes a peripheral port suitable for connecting an external device to the mobile electronic device and a power management device operable in a first mode as a battery charger to recharge the battery from an external power source and further operable in a second mode as a boost converter to power the external device from battery supplied power where the boost converter and the battery charger are provided by a single switching-converter.
Smart Monitoring Of Light Emitting Diode Strings
View pageUS Patent:
20110156600, Jun 30, 2011
Filed:
Dec 29, 2009
Appl. No.:
12/648610
Inventors:
Hendrik Santo - San Jose CA, US
Dilip S - Saratoga CA, US
Timothy James Herklots - Gilbert AZ, US
Kien Vi - Palo Alto CA, US
Ronald William Young - Los Altos CA, US
Matthew D. Schindler - San Jose CA, US
Dilip S - Saratoga CA, US
Timothy James Herklots - Gilbert AZ, US
Kien Vi - Palo Alto CA, US
Ronald William Young - Los Altos CA, US
Matthew D. Schindler - San Jose CA, US
Assignee:
MSILICA INC - Santa Clara CA
International Classification:
H05B 37/00
G01R 31/00
G01R 31/00
US Classification:
315185 R, 324414
Abstract:
System(s) and method(s) are provide to efficiently assess performance of a set of light emitting diode (LED) strings in an illumination system. A multiplexer component collects input signal from the one or more LED strings via a first set of one or more monitoring pins, processes the collected input signal, and extracts at least one output signal. The at least one output signal is conveyed to a demultiplexer component through a second set of one or more monitoring pins, wherein the number of elements in the second set of monitoring pins is equal to or smaller than the number of monitoring pins in the first set. The collected input signal is processed in accordance with at least one mode of operation of the multiplexer component, the mode of operation autonomously configured by the demultiplexer component. The multiplexer component can autonomously generate intelligence on operating status of the set of LED strings.
System And Method For Operating A One-Wire Protocol Slave In A Two-Wire Protocol Bus Environment
View pageUS Patent:
20130019039, Jan 17, 2013
Filed:
Jun 8, 2012
Appl. No.:
13/492277
Inventors:
Timothy James HERKLOTS - Cupertino CA, US
Assignee:
INTERSIL AMERICAS LLC - Milpitas CA
International Classification:
G06F 13/42
US Classification:
710105
Abstract:
A method for transmitting data on a data line of a two-wire bus wherein the bus includes a data line and a clock line includes the step of pulling the data line of the two-wire bus low to define a start condition. Next, a first group of fixed data bits enabling a slave device to determine a clock signal for an address portion of a transmission of data are transmitted between a master device and the slave device. An address of the slave device is transmitted from the master device in a second group of data bits. A third group of fixed data bits enabling the slave device to determine the clock signal for a data portion of the transmission of data between the master device and the slave device are transmitted from the master device to the slave device.
Multi-Channel Driver Equalizer
View pageUS Patent:
20130099697, Apr 25, 2013
Filed:
Oct 25, 2011
Appl. No.:
13/281366
Inventors:
Sean S. Chen - Sunnyvale CA, US
Jeff Kotowski - Nevada City CA, US
Timothy James Herklots - Cupertino CA, US
Jeff Kotowski - Nevada City CA, US
Timothy James Herklots - Cupertino CA, US
Assignee:
ATMEL CORPORATION - San Jose CA
International Classification:
H05B 37/02
US Classification:
315294
Abstract:
The disclosed multi-channel driver equalizer circuit matches currents in multiple strings of illumination devices at low current levels by using an analog equalizer to sequentially couple the output of a reference amplifier in series with each current source amplifier in a current limit loop of the driver equalizer circuit to correct the offsets of the current source amplifiers, resulting in the matching of string currents on average.
Circuit For Driving Light Emitting Elements
View pageUS Patent:
20130134889, May 30, 2013
Filed:
Nov 30, 2011
Appl. No.:
13/308190
Inventors:
Sean S. Chen - Sunnyvale CA, US
Jeff Kotowski - Nevada City CA, US
Timothy James Herklots - Cupertino CA, US
Jeff Kotowski - Nevada City CA, US
Timothy James Herklots - Cupertino CA, US
Assignee:
ATMEL CORPORATION - San Jose CA
International Classification:
H05B 37/00
US Classification:
315193
Abstract:
In one novel aspect, driving a string of light emitting elements, such as LEDs, includes applying a drive signal to circuitry that regulates a voltage appearing at a source of a transistor whose drain is coupled to one end of the string of light emitting elements and whose source is coupled to ground through a resistive element. Sequencing of the drive signal and a voltage supply signal for the light emitting elements is controlled such that the voltage supply signal is not increased above a predetermined allowable voltage for the transistor until the transistor is turned on, and such that the supply voltage is not decreased below the allowable voltage for the transistor until the transistor is turned off.
Color Correcting Device Driver
View pageUS Patent:
20140055047, Feb 27, 2014
Filed:
Nov 4, 2013
Appl. No.:
14/071281
Inventors:
Jeff Kotowski - San Jose CA, US
Timothy James Herklots - Cupertino CA, US
Timothy James Herklots - Cupertino CA, US
Assignee:
Atmel Corporation - San Jose CA
International Classification:
H05B 33/08
US Classification:
315186
Abstract:
A color correcting device driver is configured to vary the equivalent current into light emitting elements (e.g., LEDs) with the frequency of the AC input current (e.g., 120 Hz). In implementations that include a fly-back controller with a power factor correction (PFC) controller on the primary side, the color correcting device driver performs the method of: 1) turning on the loads (e.g., white and CA strings of LEDs); 2) determining if the voltage supplied to the loads has dropped by a first threshold amount; 3) turning off the loads; and 4) determining if the voltage supplied to loads has recovered by a second threshold amount (or waiting for a fixed amount of time). The method is repeated. In implementations that do not include a PFC controller on the primary side, the color correcting device driver can create a pulse width modulated (PWM) signal.