Patents by Inventor Paul Latham
Paul Latham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9438110Abstract: A system for controlling load current in a voltage converter includes a current normalization module that receives a first measurement corresponding to the load current, receives a second measurement corresponding to an inductor current, and matches a first gain of the first measurement corresponding to the load current to a second gain of the second measurement corresponding to the inductor current to generate a normalized load current. A feed-forward generation module receives the normalized load current from the current normalization module and generates a load current feed-forward (LCFF) signal based on the normalized load current. A duty cycle generation module generates a duty cycle used to control the voltage converter based on a commanded output voltage of the voltage converter and the LCFF signal.Type: GrantFiled: May 12, 2014Date of Patent: September 6, 2016Assignee: Maxim Integrated Products, Inc.Inventors: Mansur Kiadeh, Paul Latham
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Patent number: 8901899Abstract: An error determination module determines a voltage error based on an output voltage of a DC to DC converter, an estimated output voltage of the DC to DC converter, and a product of a predetermined delay value and a difference between a duty cycle and a target voltage. A capacitor current determination module determines a capacitor current based on the voltage error. A capacitor voltage determination module determines a capacitor voltage based on the voltage error. A duty cycle module sets the duty cycle for a sampling period based on the capacitor current and the capacitor voltage. A pulse width modulation (PWM) module controls a switching duty cycle of the DC to DC converter based on the duty cycle.Type: GrantFiled: September 12, 2011Date of Patent: December 2, 2014Assignee: Maxim Integrated Products, Inc.Inventors: Mansur Kiadeh, Paul Latham
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Publication number: 20140247032Abstract: A system for controlling load current in a voltage converter includes a current normalization module that receives a first measurement corresponding to the load current, receives a second measurement corresponding to an inductor current, and matches a first gain of the first measurement corresponding to the load current to a second gain of the second measurement corresponding to the inductor current to generate a normalized load current. A feed-forward generation module receives the normalized load current from the current normalization module and generates a load current feed-forward (LCFF) signal based on the normalized load current. A duty cycle generation module generates a duty cycle used to control the voltage converter based on a commanded output voltage of the voltage converter and the LCFF signal.Type: ApplicationFiled: May 12, 2014Publication date: September 4, 2014Applicant: Maxim Integrated Products, Inc.Inventors: Mansur Kiadeh, Paul Latham
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Patent number: 8751021Abstract: A system includes a power supply model component and a disturbance estimating component. The power supply model component receives an estimated disturbance. The disturbance estimating component provides said estimated disturbance from a difference between a sensed output of a power supply and an estimated output from said power supply model component.Type: GrantFiled: August 8, 2011Date of Patent: June 10, 2014Assignee: L & L Engineering, LLCInventors: Paul Latham, John C. Canfield
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Patent number: 8723499Abstract: A feed-forward control system for load current in a direct current (DC) to DC converter includes a current normalization module, a feed-forward generation module, and a duty cycle generation module. The current normalization module generates a normalized load current by matching a gain of a measured load current to a gain of an inductor current. The feed-forward generation module that generates a load current feed-forward (LCFF) signal based on the normalized load current. The duty cycle generation module generates a duty cycle for the DC to DC converter based on a commanded output voltage and the LCFF signal.Type: GrantFiled: February 24, 2011Date of Patent: May 13, 2014Assignee: Maxim Integrated Products, IncInventors: Mansur Kiadeh, Paul Latham
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Patent number: 8700184Abstract: A switching power supply includes a circuit that provides an output voltage, a switching component that switches the circuit between a first output voltage state and a second output voltage state, and a driver component that receives an input control signal and that drives the switching component to cause the circuit to switch between the first output voltage state and the second output voltage state. An adaptive plant estimator receives the output voltage from the circuit and an input to the switching power supply and provides a model of the switching power supply that reflects changes in an output voltage state of the switching power supply. A compensator design component receives the model and provides compensator parameters that reflect changes in the output voltage state of the switching power supply. An adaptive compensator receives the compensator parameters and provides the input control signal to the driver component.Type: GrantFiled: August 8, 2011Date of Patent: April 15, 2014Assignee: L&L Engineering, LLCInventors: Paul Latham, John C. Canfield
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Patent number: 8638242Abstract: Methods and systems for digital control utilizing oversampling.Type: GrantFiled: October 20, 2011Date of Patent: January 28, 2014Assignee: Maxim Integrated Products, Inc.Inventors: Paul Latham, Stewart Kenly
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Patent number: 8593117Abstract: A control system for a DC to DC converter includes a predicted state generator module, a voltage estimation module, an error module, and a pulse width modulation (PWM) module. During a prior sampling period, the predicted state generator module generates a predicted capacitor voltage and a predicted capacitor current for a current sampling period. The voltage estimation module generates an estimated value of an output voltage of the DC to DC converter during the current sampling period based on the predicted capacitor current, the predicted capacitor voltage, a delay value, and a duty cycle value for the prior sampling period. The error module generates a voltage error value based on difference between a measured value of the output voltage and the estimated value. The PWM module controls the duty cycle of the DC to DC converter based on the voltage error value.Type: GrantFiled: February 24, 2011Date of Patent: November 26, 2013Assignee: Maxin Integrated Products, Inc.Inventors: Mansur Kiadeh, Paul Latham
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Patent number: 8400130Abstract: A controller for switching power supplies includes a nonlinear controller component capable of providing a duty cycle to a pulse width modulator. The duty cycle corresponds to at least one predetermining switching power supply state variable. A nonlinear controller component receives as inputs at least one predetermined switching power supply state variable. A relationship between duty cycle and at least one predetermined switching power supply state variable is obtained by a predetermined method. The nonlinear controller component comprises memory for access by an application component. The memory includes a data structure stored in memory and a plurality of duty cycles. Each of the plurality of duty cycles has a corresponding at least one predetermined switching power supply state variable. Each duty cycle, when provided to the pulse width modulator of the switching power supply, provides a predetermined switching power supply output.Type: GrantFiled: January 4, 2011Date of Patent: March 19, 2013Assignee: Maxim Integrated Products, Inc.Inventors: Paul Latham, John C. Canfield
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Publication number: 20120217940Abstract: A control system for a DC to DC converter includes a predicted state generator module, a voltage estimation module, an error module, and a pulse width modulation (PWM) module. During a prior sampling period, the predicted state generator module generates a predicted capacitor voltage and a predicted capacitor current for a current sampling period. The voltage estimation module generates an estimated value of an output voltage of the DC to DC converter during the current sampling period based on the predicted capacitor current, the predicted capacitor voltage, a delay value, and a duty cycle value for the prior sampling period. The error module generates a voltage error value based on difference between a measured value of the output voltage and the estimated value. The PWM module controls the duty cycle of the DC to DC converter based on the voltage error value.Type: ApplicationFiled: February 24, 2011Publication date: August 30, 2012Applicant: Maxim Integrated Products, Inc.Inventors: Mansur Kiadeh, Paul Latham
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Publication number: 20120217945Abstract: A feed-forward control system for load current in a direct current (DC) to DC converter includes a current normalization module, a feed-forward generation module, and a duty cycle generation module. The current normalization module generates a normalized load current by matching a gain of a measured load current to a gain of an inductor current. The feed-forward generation module that generates a load current feed-forward (LCFF) signal based on the normalized load current. The duty cycle generation module generates a duty cycle for the DC to DC converter based on a commanded output voltage and the LCFF signal.Type: ApplicationFiled: February 24, 2011Publication date: August 30, 2012Applicant: Maxim Integrated Products, Inc.Inventors: Mansur Kiadeh, Paul Latham
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Publication number: 20120046932Abstract: A system includes a power supply model component and a disturbance estimating component. The power supply model component receives an estimated disturbance. The disturbance estimating component provides said estimated disturbance from a difference between a sensed output of a power supply and an estimated output from said power supply model component.Type: ApplicationFiled: August 8, 2011Publication date: February 23, 2012Applicant: L&L Engineering, LLCInventors: Paul Latham, John C. Canfield
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Publication number: 20120039376Abstract: Methods and systems for digital control utilizing oversampling.Type: ApplicationFiled: October 20, 2011Publication date: February 16, 2012Applicants: Maxim Integrated Products, Inc., L&L Engineering LLCInventors: Paul Latham, Stewart Kenly
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Publication number: 20120035779Abstract: A switching power supply includes a circuit that provides an output voltage, a switching component that switches the circuit between a first output voltage state and a second output voltage state, and a driver component that receives an input control signal and that drives the switching component to cause the circuit to switch between the first output voltage state and the second output voltage state. An adaptive plant estimator receives the output voltage from the circuit and an input to the switching power supply and provides a model of the switching power supply that reflects changes in an output voltage state of the switching power supply. A compensator design component receives the model and provides compensator parameters that reflect changes in the output voltage state of the switching power supply. An adaptive compensator receives the compensator parameters and provides the input control signal to the driver component.Type: ApplicationFiled: August 8, 2011Publication date: February 9, 2012Applicant: L&L Engineering, LLCInventors: Paul Latham, John C. Canfield
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Patent number: 8059018Abstract: Methods and systems for digital control utilizing oversampling.Type: GrantFiled: September 8, 2008Date of Patent: November 15, 2011Assignee: L&L Engineering, LLCInventors: Paul Latham, Stewart Kenly
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Patent number: 8014879Abstract: A digital controller includes a sampling component that samples an output signal from a system and an input signal to the system at a first sampling rate, which is at least equal to a predetermined operating rate. An input parameter obtaining component obtains a plurality of input parameters from the samples at the first sampling rate. A decimator component generates subsampled values for the plurality of input parameters at a second sampling rate, which is slower than the first sampling rate. An adaptive plant estimator component generates a model of the system based on the subsampled values. A compensator design component determines compensator parameters based on the model. The compensator parameters reflect changes in the system and are sampled at the second sampling rate. A feedback compensator adjusts the input signal to the system based on the compensator parameters.Type: GrantFiled: October 27, 2006Date of Patent: September 6, 2011Assignee: L&L Engineering, LLCInventors: Paul Latham, John C. Canfield
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Publication number: 20110193537Abstract: A controller for switching power supplies includes a nonlinear controller component capable of providing a duty cycle to a pulse width modulator. The duty cycle corresponds to at least one predetermining switching power supply state variable. A nonlinear controller component receives as inputs at least one predetermined switching power supply state variable. A relationship between duty cycle and at least one predetermined switching power supply state variable is obtained by a predetermined method. The nonlinear controller component comprises memory for access by an application component. The memory includes a data structure stored in memory and a plurality of duty cycles. Each of the plurality of duty cycles has a corresponding at least one predetermined switching power supply state variable. Each duty cycle, when provided to the pulse width modulator of the switching power supply, provides a predetermined switching power supply output.Type: ApplicationFiled: January 4, 2011Publication date: August 11, 2011Applicant: L&L Engineering LLCInventors: Paul Latham, John C. Canfield
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Patent number: 7884591Abstract: A nonlinear PWM controller for switching power supplies.Type: GrantFiled: January 13, 2010Date of Patent: February 8, 2011Assignee: L&L Engineering LLCInventors: Paul Latham, John C. Canfield
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Patent number: 7746048Abstract: A nonlinear PWM controller for switching power supplies.Type: GrantFiled: November 10, 2006Date of Patent: June 29, 2010Assignee: L&L Engineering, LLCInventors: Paul Latham, John C. Canfield
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Publication number: 20100109630Abstract: A nonlinear PWM controller for switching power suppliesType: ApplicationFiled: January 13, 2010Publication date: May 6, 2010Inventors: Paul Latham, John C. Canfield