Patents by Inventor Alberto Marinas

Alberto Marinas 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).

  • Publication number: 20200363506
    Abstract: A time-of-flight (ToF) transmitter with self-stabilized optical output phase with minimal overhead is described, where the transmitter may either function as a slave in that the laser pulse phase and width can be controlled by the master ToF receiver, or it can function as a master where the laser control pulse is generated on the same chip or a companion chip. When the ToF transmitter functions as a slave and receives the laser pulse control signal, the techniques of this disclosure can transform the receive path and the pre-driver circuit into part of a delay locked loop (DLL).
    Type: Application
    Filed: May 13, 2019
    Publication date: November 19, 2020
    Inventors: Junhua Shen, Erik D. Barnes, Alberto Marinas, Daniel Peter Canniff, Siwen Liang
  • Publication number: 20200112277
    Abstract: The present disclosure provides a feedback control system and method for a bidirectional VCM. The system employs an analog core that is common to both the PWM and linear modes of operation. The analog core includes a feedback mechanism that determines the error in the current flowing through the motor. The feedback mechanism produces an error voltage that corresponds to the current error, and applies the voltage to a control driver. The control driver then controls the motor, based on the error voltage, in either a PWM or linear mode. By sharing a common core, the switching time between modes is improved. Furthermore, the output current error between modes is reduced.
    Type: Application
    Filed: October 7, 2019
    Publication date: April 9, 2020
    Applicant: Analog Devices Global Unlimited Company
    Inventors: Jesus Javier LOPEZ, Alberto MARINAS, Eduardo M. MARTINEZ, Santiago IRIARTE
  • Patent number: 10439539
    Abstract: The present disclosure provides a feedback control system and method for a bidirectional VCM. The system employs an analog core that is common to both the PWM and linear modes of operation. The analog core includes a feedback mechanism that determines the error in the current flowing through the motor. The feedback mechanism produces an error voltage that corresponds to the current error, and applies the voltage to a control driver. The control driver then controls the motor, based on the error voltage, in either a PWM or linear mode. By sharing a common core, the switching time between modes is improved. Furthermore, the output current error between modes is reduced.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: October 8, 2019
    Assignee: ANALOG DEVICES GLOBAL UNLIMITED COMPANY
    Inventors: Jesus Javier Lopez, Alberto Marinas, Eduardo M. Martinez, Santiago Iriarte
  • Publication number: 20160344327
    Abstract: The present disclosure provides a feedback control system and method for a bidirectional VCM. The system employs an analog core that is common to both the PWM and linear modes of operation. The analog core includes a feedback mechanism that determines the error in the current flowing through the motor. The feedback mechanism produces an error voltage that corresponds to the current error, and applies the voltage to a control driver. The control driver then controls the motor, based on the error voltage, in either a PWM or linear mode. By sharing a common core, the switching time between modes is improved. Furthermore, the output current error between modes is reduced.
    Type: Application
    Filed: April 21, 2016
    Publication date: November 24, 2016
    Applicant: ANALOG DEVICES GLOBAL
    Inventors: JESUS JAVIER LOPEZ, ALBERTO MARINAS, EDUARDO M. MARTINEZ, SANTIAGO IRIARTE
  • Patent number: 8928296
    Abstract: A low dropout voltage regulator (LDO) includes first and second amplifiers and a current mirror. The first amplifier includes a first input receiving a reference voltage and a second input receiving a voltage proportional to an output of the LDO. The current mirror includes an input current at a first end of the current mirror to an output current at a second end of the current mirror, the input current controlled by an output of the first amplifier and the output current being supplied to the output of the LDO. The second amplifier includes a first input coupled to the first end of the current mirror and a second input coupled to the second end of the current mirror.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: January 6, 2015
    Assignee: Analog Devices, Inc.
    Inventors: Santiago Iriarte, Alberto Marinas
  • Patent number: 8760216
    Abstract: A reference voltage generator circuit may include at least one MOS transistor and at least one bipolar transistor coupled together to provide an electrical path from an input reference potential to an output of the generator circuit. The electrical path may extend through a gate-to-source path of the MOS transistor and further through a base-to-emitter path of the bipolar transistor. The MOS transistor may be biased by a bias current that is proportional to T2·?(T), where T represents absolute temperature and ?(T) represents mobility of a MOS transistor in the bias current generator. Optionally, the reference voltage generator may include N MOS and M multiple bipolar transistors (N?1, M?1), and the output reference voltage may be N*VGS+M*VBE as compared to the input reference potential.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: June 24, 2014
    Assignee: Analog Devices, Inc.
    Inventors: Santiago Iriarte, Alberto Marinas, Colm Donovan, Eduardo Martinez
  • Patent number: 8604890
    Abstract: A method and a circuit for increasing a resolution of a digitally controlled oscillator include controlling the oscillator so that an output signal of the oscillator varies between semi-periods having a first frequency and semi-periods having a second frequency. The method and circuit further include applying the output signal of the oscillator as an input to a divider to obtain a divided signal. A frequency of at least one semi-period of the divided signal is a function of both an oscillator semi-period having the first frequency and an oscillator semi-period having the second frequency.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: December 10, 2013
    Assignee: Analog Devices, Inc.
    Inventors: Alberto Marinas, Jose Ibanez Climent, Roberto Munoz, Pedro Lopez Canova
  • Publication number: 20130050132
    Abstract: Techniques to control a capacitive touch screen that decrease processing time and increase noise rejection. The techniques may include injecting a plurality of excitation signals having unique spectral profiles onto conductors of the capacitive touch screen, sampling signals returned from the screen, and determining a location of touch. The techniques may further include injecting a plurality of excitation signals having unique spectral profiles onto adjacent or non-adjacent conductors of the capacitive touch screen. The techniques may further include injecting a plurality of excitation signals having unique spectral profiles onto conductors of the capacitive touch screen in unequal measures. The techniques may also include mapping frequency characteristics of noise present on the capacitive touch screen.
    Type: Application
    Filed: August 26, 2011
    Publication date: February 28, 2013
    Applicant: ANALOG DEVICES, INC.
    Inventors: Javier Calpe Maravilla, Alberto Marinas, Santiago Iriarte, Enrique Company Bosch, Miguel Chanca, Reza Alavi, Vladimir Friedman, John Cleary
  • Publication number: 20130027149
    Abstract: A method and a circuit for increasing a resolution of a digitally controlled oscillator include controlling the oscillator so that an output signal of the oscillator varies between semi-periods having a first frequency and semi-periods having a second frequency. The method and circuit further include applying the output signal of the oscillator as an input to a divider to obtain a divided signal. A frequency of at least one semi-period of the divided signal is a function of both an oscillator semi-period having the first frequency and an oscillator semi-period having the second frequency.
    Type: Application
    Filed: November 16, 2011
    Publication date: January 31, 2013
    Applicant: ANALOG DEVICES, INC.
    Inventors: Alberto Marinas, Jose Ibanez Climent, Roberto Munoz, Pedro Lopez Canovas
  • Patent number: 8330324
    Abstract: An apparatus, system and method for controlling drive patterns is disclosed. A digital engine for controlling drive patterns may include a profile controller to program characteristics of one or more drive patterns for one or more piezoelectric actuators. The digital engine may further include a register array to store profile information for the one or more drive patterns. Each drive pattern may comprise a plurality of pulses with each pulse having a slope. The digital engine may also include a digital pattern generator to generate the one or more drive patterns based upon the profile information stored in the register array. The digital engine may further include a slope shaping circuit to modify one or more signals based upon an input from the digital pattern generator.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: December 11, 2012
    Assignee: Analog Devices, Inc.
    Inventors: Gary Casey, Eoin Edward English, Christian Jimenez, Alberto Marinas
  • Patent number: 8330505
    Abstract: A detection circuit is coupled to an output terminal of a driver circuit. The detection circuit includes a comparator to compare a signal at the output terminal to a reference signal corresponding to a signal that would be generated if a capacitive load having a relatively high capacitance value were connected to the output terminal. Output of the comparator is sampled at a predetermined time after the driver circuit provides the drive signal. An error signal is generated when the sampled output indicates that the capacitive load having the relatively high capacitance value is actually connected to the output terminal.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: December 11, 2012
    Assignee: Analog Devices, Inc.
    Inventors: Santiago Iriarte, Alberto Marinas, Colm Donovan, Eduardo Martinez
  • Publication number: 20120249185
    Abstract: A detection circuit is coupled to an output terminal of a driver circuit. The detection circuit includes a comparator to compare a signal at the output terminal to a reference signal corresponding to a signal that would be generated if a capacitive load having a relatively high capacitance value were connected to the output terminal. Output of the comparator is sampled at a predetermined time after the driver circuit provides the drive signal. An error signal is generated when the sampled output indicates that the capacitive load having the relatively high capacitance value is actually connected to the output terminal.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 4, 2012
    Applicant: ANALOG DEVICES, INC.
    Inventors: Santiago Iriarte, Alberto Marinas, Colm Donovan, Eduardo Martinez
  • Publication number: 20120223688
    Abstract: A low dropout voltage regulator (LDO) includes first and second amplifiers and a current mirror. The first amplifier includes a first input receiving a reference voltage and a second input receiving a voltage proportional to an output of the LDO. The current mirror includes an input current at a first end of the current mirror to an output current at a second end of the current mirror, the input current controlled by an output of the first amplifier and the output current being supplied to the output of the LDO. The second amplifier includes a first input coupled to the first end of the current mirror and a second input coupled to the second end of the current mirror.
    Type: Application
    Filed: May 20, 2011
    Publication date: September 6, 2012
    Applicant: ANALOG DEVICES, INC.
    Inventors: Santiago IRIARTE, Alberto MARINAS
  • Patent number: 8212617
    Abstract: A system for a Class AB Amplifier output stage that includes a first push pull system connected to an output terminal including a first driving transistor coupled to the output terminal and a second push pull system connected to the output terminal including a second driving transistor coupled to the output terminal. The amplifier also includes a current mode amplifier where the current mode amplifier's output is coupled to the first driving transistor's gate. The amplifier further includes a pair of resistors, a first resistor coupled to a first input terminal of the current mode amplifier, a second resistor coupled to a second input terminal of the current mode amplifier and coupled to the second driving transistor.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: July 3, 2012
    Assignee: Analog Devices, Inc.
    Inventors: Alberto Marinas, Santiago Iriarte, Colm Donovan, Eduardo Martinez
  • Publication number: 20110163811
    Abstract: A system for a Class AB Amplifier output stage that includes a first push pull system connected to an output terminal including a first driving transistor coupled to the output terminal and a second push pull system connected to the output terminal including a second driving transistor coupled to the output terminal. The amplifier also includes a current mode amplifier where the current mode amplifier's output is coupled to the first driving transistor's gate. The amplifier further includes a pair of resistors, a first resistor coupled to a first input terminal of the current mode amplifier, a second resistor coupled to a second input terminal of the current mode amplifier and coupled to the second driving transistor.
    Type: Application
    Filed: January 5, 2010
    Publication date: July 7, 2011
    Applicant: ANALOG DEVICES, INC.
    Inventors: Alberto MARINAS, Santiago IRIARTE, Colm DONOVAN, Eduardo MARTINEZ
  • Publication number: 20100308902
    Abstract: A reference voltage generator circuit may include at least one MOS transistor and at least one bipolar transistor coupled together to provide an electrical path from an input reference potential to an output of the generator circuit. The electrical path may extend through a gate-to-source path of the MOS transistor and further through a base-to-emitter path of the bipolar transistor. The MOS transistor may be biased by a bias current that is proportional to T2·?(T), where T represents absolute temperature and ?(T) represents mobility of a MOS transistor in the bias current generator. Optionally, the reference voltage generator may include N MOS and M multiple bipolar transistors (N?1, M?1), and the output reference voltage may be N*VGS+M*VBE as compared to the input reference potential.
    Type: Application
    Filed: April 19, 2010
    Publication date: December 9, 2010
    Applicant: ANALOG DEVICES, INC.
    Inventors: Santiago IRIARTE, Alberto MARINAS, Colm DONOVAN, Eduardo MARTINEZ
  • Publication number: 20100309366
    Abstract: An apparatus, system and method for controlling drive patterns is disclosed. A digital engine for controlling drive patterns may include a profile controller to program characteristics of one or more drive patterns for one or more piezoelectric actuators. The digital engine may further include a register array to store profile information for the one or more drive patterns. Each drive pattern may comprise a plurality of pulses with each pulse having a slope. The digital engine may also include a digital pattern generator to generate the one or more drive patterns based upon the profile information stored in the register array. The digital engine may further include a slope shaping circuit to modify one or more signals based upon an input from the digital pattern generator.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 9, 2010
    Inventors: Gary Casey, Eoin Edward English, Christian Jimenez, Alberto Marinas