Patents by Inventor Giuseppe Maiocchi

Giuseppe Maiocchi 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: 20190245521
    Abstract: A method includes receiving an input digital signal and applying the input digital signal to digital filter processing with a corner frequency to produce a filtered output digital signal. The digital filter processing includes a set of multiplication operations using a set of filter multiplication coefficients. The set of multiplication operations is performed by alternately using a first set of approximate multiplication coefficients and a second set of approximate multiplication coefficients different from the first set of approximate multiplication coefficients. The approximate multiplication coefficients in the first set of approximate multiplication coefficients and the second set of approximate multiplication coefficients approximate multiplication coefficients in the set of filter multiplication coefficients as a function of negative power-of-two values. The alternating of multiplication operations results in digital filter processing with average corner frequency approximating the corner frequency.
    Type: Application
    Filed: January 7, 2019
    Publication date: August 8, 2019
    Inventors: Giuseppe Maiocchi, Ezio Galbiati, Michele Boscolo Berto
  • Patent number: 9947350
    Abstract: A driver device coupled to a winding of an electro-mechanical actuator includes: a power stage driving the winding in a discontinuous mode by alternating conduction on-phases to off-phases, and a sensor circuit sensing a voltage across the winding in an off-phase, wherein, during such an off-phase the voltage across the winding includes a residual voltage which decays to zero. The power stage drives the winding from an on-phase to an off-phase by applying to the winding a reverse current pulse to invert the direction of flow of the current through the winding and produce an oscillation of the residual voltage, whereby the residual voltage includes a zero-crossing point after the current through the winding is exhausted. The sensor circuit senses the voltage across the winding at this zero-crossing point, whereby the voltage sensed across the winding at the zero-crossing point is indicative of the back electromotive force of the winding.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: April 17, 2018
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Michele Boscolo Berto, Ezio Galbiati, Giuseppe Maiocchi
  • Patent number: 9780703
    Abstract: A power supply may include power generation circuits, each configured to drive a respective winding of a multiphase motor; converter circuits, each configured to generate a digital driving signal for a respective power generation circuit, and a memory configured to store a plurality of fast recirculation compensation values corresponding to combinations of the digital driving signals that would otherwise result in a fast recirculation condition. The power supply may also include a controller coupled to the memory and configured to determine when a given combination of the digital driving signals would otherwise result in a fast recirculation condition, and based upon the determination, substitute at least one corresponding fast recirculation compensation value for the given combination of the digital driving signals.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: October 3, 2017
    Assignee: STMicroelectronics S.r.l.
    Inventor: Giuseppe Maiocchi
  • Patent number: 9780770
    Abstract: A control unit is for a bridge circuit. The control unit may include a signal generator configured to generate first and second periodic drive signals for the bridge circuit, and determine a switch-on duration of the first and second periodic drive signals based upon a first digital data value having a first resolution. The control unit may include a controller configured to receive a second digital data value having a second resolution. The second resolution may be greater than the first resolution. The controller may be configured to generate the first digital data value so that, over periods of the first and second periodic drive signals, the first digital data value corresponds to an average of the second digital data value.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: October 3, 2017
    Assignee: STMicroelectronics S.r.l.
    Inventors: Matteo Scorrano, Giuseppe Maiocchi
  • Publication number: 20170063364
    Abstract: A control unit is for a bridge circuit. The control unit may include a signal generator configured to generate first and second periodic drive signals for the bridge circuit, and determine a switch-on duration of the first and second periodic drive signals based upon a first digital data value having a first resolution. The control unit may include a controller configured to receive a second digital data value having a second resolution. The second resolution may be greater than the first resolution. The controller may be configured to generate the first digital data value so that, over periods of the first and second periodic drive signals, the first digital data value corresponds to an average of the second digital data value.
    Type: Application
    Filed: May 25, 2016
    Publication date: March 2, 2017
    Inventors: Matteo SCORRANO, Giuseppe Maiocchi
  • Publication number: 20170047871
    Abstract: A power supply may include power generation circuits, each configured to drive a respective winding of a multiphase motor; converter circuits, each configured to generate a digital driving signal for a respective power generation circuit, and a memory configured to store a plurality of fast recirculation compensation values corresponding to combinations of the digital driving signals that would otherwise result in a fast recirculation condition. The power supply may also include a controller coupled to the memory and configured to determine when a given combination of the digital driving signals would otherwise result in a fast recirculation condition, and based upon the determination, substitute at least one corresponding fast recirculation compensation value for the given combination of the digital driving signals.
    Type: Application
    Filed: August 12, 2015
    Publication date: February 16, 2017
    Inventor: Giuseppe MAIOCCHI
  • Patent number: 9385639
    Abstract: A switching controller of a poly-phase electric motor may generate, in a fully digital manner, a replica of the phase current and/or of the phase (star) voltage of one or more windings of the motor. The switching controller may use digital signals already available for driving the motor to reconstruct a replica of the phase current or the phase voltage, and thereby avoid the need for dedicated analog components for phase current or phase voltage determination.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: July 5, 2016
    Assignee: STMICROELECTRONICS S.R.L.
    Inventor: Giuseppe Maiocchi
  • Patent number: 9294030
    Abstract: A method of PWM regulating a motor through a half-bridge drive stage includes sampling the motor current to obtain sampled values during driving intervals or during current decay intervals, and comparing a last sampled value with a current threshold. The motor is coupled in a slow decay electrical path for the duration of a current decay interval if the last sampled value does not exceed the current threshold. Otherwise the motor is coupled in a fast decay electrical path for a portion of the duration of the current decay interval, and is coupled in the slow decay electrical path for a remaining part of the duration of the same current decay interval.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: March 22, 2016
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Paolo Pascale, Federico Magni, Ezio Galbiati, Giuseppe Maiocchi, Michele Berto Boscolo
  • Publication number: 20140354201
    Abstract: A switching controller of a poly-phase electric motor may generate, in a fully digital manner, a replica of the phase current and/or of the phase (star) voltage of one or more windings of the motor. The switching controller may use digital signals already available for driving the motor to reconstruct a replica of the phase current or the phase voltage, and thereby avoid the need for dedicated analog components for phase current or phase voltage determination.
    Type: Application
    Filed: May 22, 2014
    Publication date: December 4, 2014
    Applicant: STMicroelectronics S.r.l.
    Inventor: Giuseppe MAIOCCHI
  • Publication number: 20140217949
    Abstract: A method of PWM regulating a motor through a half-bridge drive stage includes sampling the motor current to obtain sampled values during driving intervals or during current decay intervals, and comparing a last sampled value with a current threshold. The motor is coupled in a slow decay electrical path for the duration of a current decay interval if the last sampled value does not exceed the current threshold. Otherwise the motor is coupled in a fast decay electrical path for a portion of the duration of the current decay interval, and is coupled in the slow decay electrical path for a remaining part of the duration of the same current decay interval.
    Type: Application
    Filed: January 30, 2014
    Publication date: August 7, 2014
    Applicant: STMicroelectronics S.r.I.
    Inventors: Paolo PASCALE, Federico Magni, Ezio Galbiati, Giuseppe Maiocchi, Michele Berto Boscolo
  • Patent number: 8659250
    Abstract: A management apparatus is described of a rotating motor and a load during power loss; the apparatus comprises a first switching circuit coupled with the rotating motor and a controller of said first switching circuit. The controller is configured to drive the first switching circuit so as to convert a back-electromotive force voltage developed in the rotating motor into a power supply voltage for the load. The first switching circuit is driven in accordance with a first duty cycle. The apparatus comprises a second switching circuit coupled with the load and driven in accordance with a second duty cycle. The controller is configured to vary said first and said second duty cycles to keep the power supply voltage for the load above or equal to a threshold voltage.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: February 25, 2014
    Assignee: STMicroelectronics S.r.l.
    Inventors: Giuseppe Maiocchi, Ezio Galbiati
  • Publication number: 20120161678
    Abstract: A management apparatus is described of a rotating motor and a load during power loss; the apparatus comprises a first switching circuit coupled with the rotating motor and a controller of said first switching circuit. The controller is configured to drive the first switching circuit so as to convert a back-electromotive force voltage developed in the rotating motor into a power supply voltage for the load. The first switching circuit is driven in accordance with a first duty cycle. The apparatus comprises a second switching circuit coupled with the load and driven in accordance with a second duty cycle. The controller is configured to vary said first and said second duty cycles to keep the power supply voltage for the load above or equal to a threshold voltage.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 28, 2012
    Applicant: STMicroelectronics S.r.l.
    Inventors: Giuseppe Maiocchi, Ezio Galbiati
  • Patent number: 8044619
    Abstract: A method of preventing concurrent or quasi-concurrent commutations of a pair of phase shift modulation (PSM) drive signals of an output bridge stage driving an electrical load includes establishing a threshold level of a programmed current level to be transmitted though the electrical load. The method also includes, if the programmed current level is lower than the threshold level, enhancing a time offset between commutation edges of the pair of PSM drive signals by a minimum time.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: October 25, 2011
    Assignee: STMicroelectronics S.R.L.
    Inventors: Giuseppe Maiocchi, Ezio Galbiati, Michele Boscolo Berto
  • Patent number: 8018364
    Abstract: A control apparatus for a supply device of a load, the supply device is of switching type and connected between a supply voltage and a reference voltage, the apparatus including a sigma-delta device having an input terminal at which is present a first digital signal and adapted to provide a pulse-density modulation signal at the output terminal; the sigma-delta device including a feedback circuit capable of sending to the input terminal of the sigma-delta device a second digital signal whose value depends on the value of the output signal, and the apparatus including a device capable of digitalizing the supply voltage and of providing a further digital signal. The feedback circuit includes a terminal capable of receiving the further digital signal, and the sigma-delta device having a gain such that the output digital signal is proportional to the inverse of the further digital signal.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: September 13, 2011
    Assignee: STMicroelectronics S.r.L.
    Inventor: Giuseppe Maiocchi
  • Publication number: 20100156687
    Abstract: A control apparatus for a supply device of a load, the supply device is of switching type and connected between a supply voltage and a reference voltage, the apparatus including a sigma-delta device having an input terminal at which is present a first digital signal and adapted to provide a pulse-density modulation signal at the output terminal; the sigma-delta device including a feedback circuit capable of sending to the input terminal of the sigma-delta device a second digital signal whose value depends on the value of the output signal, and the apparatus including a device capable of digitalizing the supply voltage and of providing a further digital signal. The feedback circuit includes a terminal capable of receiving the further digital signal, and the sigma-delta device having a gain such that the output digital signal is proportional to the inverse of the further digital signal.
    Type: Application
    Filed: December 23, 2009
    Publication date: June 24, 2010
    Applicant: STMicroelectronics S.r.l.
    Inventor: Giuseppe Maiocchi
  • Patent number: 7332886
    Abstract: An integrated control and power driving system moves a read/write head carrying arm over the surface of a disk. The integrated control and power driving system is applicable to a spindle motor, a mass storage disk drive and a voice-coil motor, for example, and includes a first chip and a second chip. The first chip integrates the output power stages driving the motors, and has an interface for outputting feedback signals representing functioning conditions of the voice-coil motor and of the spindle motor, and for receiving digital control signals of the output power stages. The second chip integrates logic drive and control circuitries of the power stages and an interface for receiving the feedback signals output by the first chip, and for transmitting to the first chip the digital control signals.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: February 19, 2008
    Assignee: STMicroelectronics S.r.l.
    Inventors: Giuseppe Maiocchi, Michele Boscolo, Roberto Bardelli
  • Publication number: 20070296362
    Abstract: A method of preventing concurrent or quasi-concurrent commutations of a pair of phase shift modulation (PSM) drive signals of an output bridge stage driving an electrical load includes establishing a threshold level of a programmed current level to be transmitted though the electrical load. The method also includes, if the programmed current level is lower than the threshold level, enhancing a time offset between commutation edges of the pair of PSM drive signals by a minimum time.
    Type: Application
    Filed: June 8, 2007
    Publication date: December 27, 2007
    Applicant: STMicroelectronics S.r.l.
    Inventors: Giuseppe Maiocchi, Ezio Galbiati, Michele Boscolo Berto
  • Patent number: 7215094
    Abstract: A method for sensing a back electromotive force induced in a winding of a voice coil electro-mechanical actuator controlled in a discontinuous mode by alternating conduction phases to off-phases includes sensing voltage at terminals of the winding during an off-phase The winding is driven during a conduction phase immediately preceding the off-phase to invert, during a final portion of the conduction phase before entering an off-phase, a direction of flow of the current through the winding.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: May 8, 2007
    Assignee: STMicroelectronics S.r.l.
    Inventors: Giuseppe Maiocchi, Ezio Galbiati, Michele Boscolo
  • Publication number: 20070031130
    Abstract: An integrated control and power driving system moves a read/write head carrying arm over the surface of a disk. The integrated control and power driving system is applicable to a spindle motor, a mass storage disk drive and a voice-coil motor, for example, and includes a first chip and a second chip. The first chip integrates the output power stages driving the motors, and has an interface for outputting feedback signals representing functioning conditions of the voice-coil motor and of the spindle motor, and for receiving digital control signals of the output power stages.
    Type: Application
    Filed: August 4, 2006
    Publication date: February 8, 2007
    Applicant: STMicroelectronics S.r.l.
    Inventors: Giuseppe Maiocchi, Michele Boscolo, Roberto Bardelli
  • Patent number: RE42113
    Abstract: An integrated control and power driving system moves a read/write head carrying arm over the surface of a disk. The integrated control and power driving system is applicable to a spindle motor, a mass storage disk drive and a voice-coil motor, for example, and includes a first chip and a second chip. The first chip integrates the output power stages driving the motors, and has an interface for outputting feedback signals representing functioning conditions of the voice-coil motor and of the spindle motor, and for receiving digital control signals of the output power stages. The second chip integrates logic drive and control circuitries of the power stages and an interface for receiving the feedback signals output by the first chip, and for transmitting to the first chip the digital control signals.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: February 8, 2011
    Assignee: STMicroelectronics S.r.l.
    Inventors: Giuseppe Maiocchi, Michele Boscolo, Roberto Bardelli