MATTHEW HARRIS
Social Work at Manning Dr, Chapel Hill, NC
License number
North Carolina 4431
Category
Social Work
Type
Clinical Neuropsychologist
Address
Address
2
101 Manning Dr, Chapel Hill, NC 27514
726 Edinborough Dr, Durham, NC 27703
726 Edinborough Dr, Durham, NC 27703
Phone
(831) 334-1007
Professional information
Matthew Harris
Location:
Durham, North Carolina
Industry:
Marketing and Advertising
Thermally Compensated Current Sensing Of Intrinsic Power Converter Elements
US Patent:
6833690, Dec 21, 2004
Filed:
Mar 23, 2004
Appl. No.:
10/806605
Inventors:
Michael M. Walters - Apex NC
Matthew B. Harris - Durham NC
Bogdan M. Duduman - Raleigh NC
Matthew B. Harris - Durham NC
Bogdan M. Duduman - Raleigh NC
Assignee:
Intersil Americas Inc. - Milpitas CA
International Classification:
G05F 1573
US Classification:
323277, 323275
Abstract:
A DC-to-DC converter includes one or more power switches, a pulse width modulation circuit for generating control pulses for the power switches, and an output inductor connected to the power switches. A thermally compensated current sensor is connected to an intrinsic current sensing element exhibiting a temperature-based parameter non-linearity. The thermally compensated current sensor has a temperature coefficient that substantially matches a temperature coefficient of an intrinsic power converter element used to measure current flow, thus linearizing the current measurement. Also, a current feedback loop circuit cooperates with the pulse width modulation circuit to control the power switches responsive to the thermally compensated current sensor.
Thermally Compensated Current Sensing Of Intrinsic Power Converter Elements
US Patent:
6812677, Nov 2, 2004
Filed:
Aug 15, 2002
Appl. No.:
10/219555
Inventors:
Michael M. Walters - Apex NC
Matthew B. Harris - Durham NC
Bogdan M. Duduman - Raleigh NC
Matthew B. Harris - Durham NC
Bogdan M. Duduman - Raleigh NC
Assignee:
Intersil Americas Inc. - Milpitas CA
International Classification:
G05F 1573
US Classification:
323277, 323275
Abstract:
A DC-to-DC converter includes one or more power switches, a pulse width modulation circuit for generating control pulses for the power switches, and an output inductor connected to the power switches. A thermally compensated current sensor is connected to an intrinsic current sensing element exhibiting a temperature-based parameter non-linearity. The thermally compensated current sensor has a temperature coefficient that substantially matches a temperature coefficient of an intrinsic power converter element used to measure current flow, thus linearizing the current measurement. Also, a current feedback loop circuit cooperates with the pulse width modulation circuit to control the power switches responsive to the thermally compensated current sensor.
Dc-To-Dc Converter With Fast Override Feedback Control And Associated Methods
US Patent:
6696825, Feb 24, 2004
Filed:
Mar 18, 2002
Appl. No.:
10/100439
Inventors:
Matthew Burdet Harris - Durham NC
Robert Haynes Isham - Flemington NJ
Robert Haynes Isham - Flemington NJ
Assignee:
Intersil Americas Inc. - Milpitas CA
International Classification:
G05F 140
US Classification:
323282, 323285
Abstract:
A DC-to-DC converter includes a pulse width modulation (PWM) circuit cooperating with at least one power switch for supplying power from a source to a load over a range between a lower limit and an upper limit to thereby control an output voltage for the load. The converter may also include a primary feedback control loop cooperating with the PWM circuit for supplying power to the load between the lower and upper limits based upon the output voltage during normal load transient conditions. The converter may also include at least one override feedback control loop cooperating with the PWM circuit for overriding the primary feedback control loop and supplying power to the load at one of the lower and upper limits based upon the output voltage during a corresponding relatively fast load transient condition. Accordingly, relatively fast load transients can be followed by the converter.
Thermal Compensation Method And Device For Circuits With Temperature-Dependent Current Sensing Elements
US Patent:
6687105, Feb 3, 2004
Filed:
Aug 15, 2002
Appl. No.:
10/219556
Inventors:
Bogdan M. Duduman - Raleigh NC
Matthew B. Harris - Durham NC
Robert H. Isham - Flemington NJ
Matthew B. Harris - Durham NC
Robert H. Isham - Flemington NJ
Assignee:
Intersil Americas Inc. - Milpitas CA
International Classification:
H02H 700
US Classification:
361 939, 361 18
Abstract:
The integrated control circuit is for an electronic circuit, such as a DC-to-DC converter, using current sense information developed across an intrinsic circuit element of the electronic circuit. The integrated control circuit includes a temperature sensor to sense a temperature rise induced by the intrinsic circuit element of the electronic circuit. The temperature error signal and a feedback signal from the intrinsic circuit element of the converter are combined to provide a temperature-corrected feedback signal to a control unit for the converter.
Thermally Compensated Current Sensing Of Intrinsic Power Converter Elements
US Patent:
6870352, Mar 22, 2005
Filed:
Jun 2, 2004
Appl. No.:
10/858586
Inventors:
Michael M. Walters - Apex NC, US
Matthew B. Harris - Durham NC, US
Bogdan M. Duduman - Raleigh NC, US
Matthew B. Harris - Durham NC, US
Bogdan M. Duduman - Raleigh NC, US
Assignee:
Intersil Americas Inc. - Milpitas CA
International Classification:
G05F001/573, G05F001/565
US Classification:
323277, 323275
Abstract:
A DC-to-DC converter includes one or more power switches, a pulse width modulation circuit for generating control pulses for the power switches, and an output inductor connected to the power switches. A thermally compensated current sensor is connected to an intrinsic current sensing element exhibiting a temperature-based parameter non-linearity. The thermally compensated current sensor has a temperature coefficient that substantially matches a temperature coefficient of an intrinsic power converter element used to measure current flow, thus linearizing the current measurement. Also, a current feedback loop circuit cooperates with the pulse width modulation circuit to control the power switches responsive to the thermally compensated current sensor.
Switching Regulator With Balanced Control Configuration With Filtering And Referencing To Eliminate Compensation
US Patent:
8344717, Jan 1, 2013
Filed:
Jan 31, 2012
Appl. No.:
13/362015
Inventors:
Rhys S. A. Philbrick - Cary NC, US
Matthew B. Harris - Durham NC, US
Steven P. Laur - Raleigh NC, US
Matthew B. Harris - Durham NC, US
Steven P. Laur - Raleigh NC, US
Assignee:
Intersil Americas Inc. - Milpitas CA
International Classification:
G05F 1/565, G05F 1/575
US Classification:
323286, 323282, 323285
Abstract:
A switching regulator and controller and an electronic device using same are disclosed in which the controller includes a sense circuit, an error amplifier circuit, a filter and reference circuit, and a comparator circuit. The switching regulator includes a pulse switch circuit coupled to an output inductor for developing an output voltage. The sense circuit provides a sense signal indicative of current through the output inductor. The error amplifier circuit develops an error signal indicative of error of the output voltage. The filter and reference circuit high pass filters the sense signal to provide a filtered sense signal and which balances the filtered sense signal and the error signal at a common DC level. The comparator circuit develops a pulse control signal using the error signal and the filtered sense signal, where the pulse control signal is for controlling switching of the pulse switch circuit.
Multiphase Dc-Dc Converter With Reduced Ripple
US Patent:
7084613, Aug 1, 2006
Filed:
Feb 26, 2004
Appl. No.:
10/787518
Inventors:
Matthew B. Harris - Durham NC, US
James W. Leith - Seattle WA, US
Brandon D. Day - Seattle WA, US
James W. Leith - Seattle WA, US
Brandon D. Day - Seattle WA, US
Assignee:
Intersil Americas Inc. - Milpitas CA
International Classification:
G05F 1/59
US Classification:
323272, 323299, 363 41, 363 65
Abstract:
A PWM system that minimizes output ripple of a multiphase DC-DC converter which converts N input voltages including at least one dissimilar input voltage. The PWM system includes PWM waveform logic that generates N PWM signals including a PWM signal for each of the N input voltages, and PWM control logic that optimizes relative phases of the N PWM signals based on voltage levels of the N input voltages. Various circuits and/or methods are contemplated for optimizing phase, including, for example, centering pulses for each PWM cycle, distributing pulses based on predetermined optimal phase angles, determining input voltage levels and selecting predetermined optimal phase angles, generating phase signals employing predetermined phase angles, measuring input voltages and calculating optimal phase angles, and using PLL logic or the like to measure and equalize off-times between PWM pulses.
Clocked Cascading Current-Mode Regulator With High Noise Immunity And Arbitrary Phase Count
US Patent:
7002325, Feb 21, 2006
Filed:
Dec 29, 2003
Appl. No.:
10/747833
Inventors:
Matthew B. Harris - Durham NC, US
Michael M. Walters - Apex NC, US
Michael M. Walters - Apex NC, US
Assignee:
Intersil Americas Inc. - Milpitas CA
International Classification:
G05F 1/40
US Classification:
323272
Abstract:
A clocked cascadable power regulator including synchronization logic and PWM control logic. The synchronization logic receives a clock signal and asserts a digital output signal synchronized with the clock signal in response to assertion of a digital input signal. The PWM control logic controls a PWM cycle in response to the digital input signal and in response to an output control condition. The regulator may be used alone or cascaded with other similar regulators for implementing a multiphase power converter with multiple channels. The clocked cascadable regulator uses digital signals to communicate between channels. Digital signals are not prone to the same kind of signal degradation or noise susceptibility as analog signals. In the cascaded configuration, there is one clock common to all channels which ensures that the phase separation between the channels is symmetrical to within the jitter tolerance of the common clock.
Cascadable Current-Mode Regulator
US Patent:
7061215, Jun 13, 2006
Filed:
Dec 18, 2003
Appl. No.:
10/739757
Inventors:
Matthew B. Harris - Durham NC, US
Assignee:
Intersil Americas Inc. - Milpitas CA
International Classification:
G05F 1/40
US Classification:
323268, 323271
Abstract:
A cascadable power regulator including a programmable delay unit and PWM control logic. The programmable delay unit initiates a delay period in response to a digital input signal and asserts a digital output signal upon expiration of the delay period. The PWM control logic controls a PWM cycle in response to the digital input signal and in response to an output control condition. The cascadable regulator uses digital signals to communicate between channels. Digital signals are not prone to the same kind of signal degradation or noise susceptibility as analog signals. Thus, the number of phases is not limited, the physical separation between the regulators is not limited, and the switching frequency is not as limited. There is no clock signal from a separate controller so that the controller is a relatively simple, low-cost device. Since there is no clock, a unique self-oscillating system is achieved using the cascadable regulator.