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).

  • Patent number: 9438110
    Abstract: 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: Grant
    Filed: May 12, 2014
    Date of Patent: September 6, 2016
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Mansur Kiadeh, Paul Latham
  • Patent number: 8901899
    Abstract: 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: Grant
    Filed: September 12, 2011
    Date of Patent: December 2, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Mansur Kiadeh, Paul Latham
  • Publication number: 20140247032
    Abstract: 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: Application
    Filed: May 12, 2014
    Publication date: September 4, 2014
    Applicant: Maxim Integrated Products, Inc.
    Inventors: Mansur Kiadeh, Paul Latham
  • Patent number: 8751021
    Abstract: 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: Grant
    Filed: August 8, 2011
    Date of Patent: June 10, 2014
    Assignee: L & L Engineering, LLC
    Inventors: Paul Latham, John C. Canfield
  • Patent number: 8723499
    Abstract: 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: Grant
    Filed: February 24, 2011
    Date of Patent: May 13, 2014
    Assignee: Maxim Integrated Products, Inc
    Inventors: Mansur Kiadeh, Paul Latham
  • Patent number: 8700184
    Abstract: 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: Grant
    Filed: August 8, 2011
    Date of Patent: April 15, 2014
    Assignee: L&L Engineering, LLC
    Inventors: Paul Latham, John C. Canfield
  • Patent number: 8638242
    Abstract: Methods and systems for digital control utilizing oversampling.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: January 28, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Paul Latham, Stewart Kenly
  • Patent number: 8593117
    Abstract: 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: Grant
    Filed: February 24, 2011
    Date of Patent: November 26, 2013
    Assignee: Maxin Integrated Products, Inc.
    Inventors: Mansur Kiadeh, Paul Latham
  • Patent number: 8400130
    Abstract: 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: Grant
    Filed: January 4, 2011
    Date of Patent: March 19, 2013
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Paul Latham, John C. Canfield
  • Publication number: 20120217940
    Abstract: 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: Application
    Filed: February 24, 2011
    Publication date: August 30, 2012
    Applicant: Maxim Integrated Products, Inc.
    Inventors: Mansur Kiadeh, Paul Latham
  • Publication number: 20120217945
    Abstract: 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: Application
    Filed: February 24, 2011
    Publication date: August 30, 2012
    Applicant: Maxim Integrated Products, Inc.
    Inventors: Mansur Kiadeh, Paul Latham
  • Publication number: 20120046932
    Abstract: 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: Application
    Filed: August 8, 2011
    Publication date: February 23, 2012
    Applicant: L&L Engineering, LLC
    Inventors: Paul Latham, John C. Canfield
  • Publication number: 20120039376
    Abstract: Methods and systems for digital control utilizing oversampling.
    Type: Application
    Filed: October 20, 2011
    Publication date: February 16, 2012
    Applicants: Maxim Integrated Products, Inc., L&L Engineering LLC
    Inventors: Paul Latham, Stewart Kenly
  • Publication number: 20120035779
    Abstract: 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: Application
    Filed: August 8, 2011
    Publication date: February 9, 2012
    Applicant: L&L Engineering, LLC
    Inventors: Paul Latham, John C. Canfield
  • Patent number: 8059018
    Abstract: Methods and systems for digital control utilizing oversampling.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: November 15, 2011
    Assignee: L&L Engineering, LLC
    Inventors: Paul Latham, Stewart Kenly
  • Patent number: 8014879
    Abstract: 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: Grant
    Filed: October 27, 2006
    Date of Patent: September 6, 2011
    Assignee: L&L Engineering, LLC
    Inventors: Paul Latham, John C. Canfield
  • Publication number: 20110193537
    Abstract: 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: Application
    Filed: January 4, 2011
    Publication date: August 11, 2011
    Applicant: L&L Engineering LLC
    Inventors: Paul Latham, John C. Canfield
  • Patent number: 7884591
    Abstract: A nonlinear PWM controller for switching power supplies.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: February 8, 2011
    Assignee: L&L Engineering LLC
    Inventors: Paul Latham, John C. Canfield
  • Patent number: 7746048
    Abstract: A nonlinear PWM controller for switching power supplies.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: June 29, 2010
    Assignee: L&L Engineering, LLC
    Inventors: Paul Latham, John C. Canfield
  • Publication number: 20100109630
    Abstract: A nonlinear PWM controller for switching power supplies
    Type: Application
    Filed: January 13, 2010
    Publication date: May 6, 2010
    Inventors: Paul Latham, John C. Canfield