Patents by Inventor William Todd Harrison
William Todd Harrison 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: 11901271Abstract: In some examples, a direct current (DC)-DC power converter package comprises a controller, a conductive member, and a first field effect transistor (FET) coupled to the controller and having a first source and a first drain, the first FET coupled to a first portion of the conductive member. The package also comprises a second FET coupled to the controller and having a second source and a second drain, the second FET coupled to a second portion of the conductive member, the first and second portions of the conductive member being non-overlapping in a horizontal plane. The first and second FETs are non-overlapping.Type: GrantFiled: December 30, 2022Date of Patent: February 13, 2024Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Yiqi Tang, Liang Wan, William Todd Harrison, Manu Joseph Prakuzhy, Rajen Manicon Murugan
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Publication number: 20230145761Abstract: In some examples, a direct current (DC)-DC power converter package comprises a controller, a conductive member, and a first field effect transistor (FET) coupled to the controller and having a first source and a first drain, the first FET coupled to a first portion of the conductive member. The package also comprises a second FET coupled to the controller and having a second source and a second drain, the second FET coupled to a second portion of the conductive member, the first and second portions of the conductive member being non-overlapping in a horizontal plane. The first and second FETs are non-overlapping.Type: ApplicationFiled: December 30, 2022Publication date: May 11, 2023Inventors: Yiqi TANG, Liang WAN, William Todd HARRISON, Manu Joseph PRAKUZHY, Rajen Manicon MURUGAN
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Patent number: 11545420Abstract: In some examples, a direct current (DC)-DC power converter package comprises a controller, a conductive member, and a first field effect transistor (FET) coupled to the controller and having a first source and a first drain, the first FET coupled to a first portion of the conductive member. The package also comprises a second FET coupled to the controller and having a second source and a second drain, the second FET coupled to a second portion of the conductive member, the first and second portions of the conductive member being non-overlapping in a horizontal plane. The first and second FETs are non-overlapping.Type: GrantFiled: February 11, 2020Date of Patent: January 3, 2023Assignee: Texas Instruments IncorporatedInventors: Yiqi Tang, Liang Wan, William Todd Harrison, Manu Joseph Prakuzhy, Rajen Manicon Murugan
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Publication number: 20200258825Abstract: In some examples, a direct current (DC)-DC power converter package comprises a controller, a conductive member, and a first field effect transistor (FET) coupled to the controller and having a first source and a first drain, the first FET coupled to a first portion of the conductive member. The package also comprises a second FET coupled to the controller and having a second source and a second drain, the second FET coupled to a second portion of the conductive member, the first and second portions of the conductive member being non-overlapping in a horizontal plane. The first and second FETs are non-overlapping.Type: ApplicationFiled: February 11, 2020Publication date: August 13, 2020Inventors: Yiqi TANG, Liang WAN, William Todd HARRISON, Manu Joseph PRAKUZHY, Rajen Manicon MURUGAN
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Patent number: 10439482Abstract: In an embodiment, an adaptive drive strength switching converter includes a driver and a control loop coupled to the driver. In an embodiment, the control loop includes a peak detector, a comparator coupled to an output of the peak detector, a counter coupled to an output of the comparator, and a digital-to-analog converter (DAC) coupled to an output of the comparator.Type: GrantFiled: September 22, 2017Date of Patent: October 8, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Shailendra Kumar Baranwal, William Todd Harrison, Yogesh Kumar Ramadass
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Publication number: 20190097517Abstract: In an embodiment, an adaptive drive strength switching converter includes a driver and a control loop coupled to the driver. In an embodiment, the control loop includes a peak detector, a comparator coupled to an output of the peak detector, a counter coupled to an output of the comparator, and a digital-to-analog converter (DAC) coupled to an output of the comparator.Type: ApplicationFiled: September 22, 2017Publication date: March 28, 2019Inventors: Shailendra Kumar BARANWAL, William Todd HARRISON, Yogesh Kumar RAMADASS
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Patent number: 8884598Abstract: A method of operating a DC/DC converter in a continuous-conduction mode (CCM) or in a discontinuous-conduction mode (DCM) to produce an output voltage, the DC/DC converter setting a pulse width modulation in CCM based on a COMP signal that varies as a function of the output voltage, the method including capturing the COMP signal utilizing a digital-to-analog converter at a transition between CCM and DCM, and varying a frequency of operation of the DC/DC converter in DCM based on the captured COMP signal.Type: GrantFiled: February 17, 2012Date of Patent: November 11, 2014Assignee: Texas Instruments IncorporatedInventor: William Todd Harrison
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Patent number: 8754699Abstract: A filter is implemented as cascaded stages, and in at least one stage all resistances are implemented as double-sampled switched-capacitor circuits. In a variation, at least one resistance is implemented as a double-sampled switched-capacitor T-network. In a variation, in an integrator stage, a resistance is implemented as a transconductance, and the cutoff frequency of the integrator stage scales with a switching frequency of a DC-DC voltage converter.Type: GrantFiled: November 3, 2011Date of Patent: June 17, 2014Assignee: Texas Instruments IncorporatedInventors: Gaurav Bawa, William Todd Harrison
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Publication number: 20130113550Abstract: A filter is implemented as cascaded stages, and in at least one stage all resistances are implemented as double-sampled switched-capacitor circuits. In a variation, at least one resistance is implemented as a double-sampled switched-capacitor T-network. In a variation, in an integrator stage, a resistance is implemented as a transconductance, and the cutoff frequency of the integrator stage scales with a switching frequency of a DC-DC voltage converter.Type: ApplicationFiled: November 3, 2011Publication date: May 9, 2013Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Gaurav Bawa, William Todd Harrison
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Publication number: 20120228696Abstract: A stacked die power converter package includes a lead frame including a die pad and a plurality of package pins, a first die including a first power transistor switch (first power transistor) attached to the die pad, and a first metal clip attached to one side of the first die. The first metal clip is coupled to at least one package pin. A second die including a second power transistor switch (second power transistor) is attached to another side on the first metal clip. A controller is provided by a controller die attached to a second metal clip on one side of the second die, a controller die attached to the second die, or the controller is integrated on the second die. The controller is coupled to both a first control node of the first power transistor and a second control node of the second power transistor.Type: ApplicationFiled: March 7, 2011Publication date: September 13, 2012Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: BRIAN ASHLEY CARPENTER, CHRISTOPHER J. SANZO, WILLIAM TODD HARRISON
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Publication number: 20120212203Abstract: A method of operating a DC/DC converter in a continuous-conduction mode (CCM) or in a discontinuous-conduction mode (DCM) to produce an output voltage, the DC/DC converter setting a pulse width modulation in CCM based on a COMP signal that varies as a function of the output voltage, the method including capturing the COMP signal utilizing a digital-to-analog converter at a transition between CCM and DCM, and varying a frequency of operation of the DC/DC converter in DCM based on the captured COMP signal.Type: ApplicationFiled: February 17, 2012Publication date: August 23, 2012Inventor: William Todd HARRISON
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Patent number: 7746045Abstract: A multi-phase power system including a plurality of Pulse Width Modulation (PWM) controllers is provided, including a first PWM controller and at least one second PWM controller. The first PWM controller is configured to generate at least one first output signal based on a first clock signal, and to insert at least one synchronizing pulse into the first clock signal, the synchronizing pulse having a predetermined characteristic differing from pulses of the first clock signal, and to provide the first clock signal including the synchronizing pulse to the second PWM controller. The second PWM controller is configured to generate at least one second output signal based on the first clock signal, and to synchronize the generation of the first and second output signals using the synchronizing pulse within the first clock signal, thereby maintaining a predetermined phase relationship between the first and second output signals.Type: GrantFiled: March 9, 2007Date of Patent: June 29, 2010Assignee: Texas Instruments IncorporatedInventors: William Todd Harrison, Xuening Li
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Patent number: 7705689Abstract: Synchronously stackable double-edge modulated pulse width modulation generators are disclosed. An example pulse width modulation generator includes a ramp generator to generate first and second ramp signals that interact to form a virtual ramp signal; and a comparator module coupled to the ramp generator configured to produce a pulse width modulated signal based on a comparison between the virtual ramp signal and an input signal.Type: GrantFiled: May 19, 2008Date of Patent: April 27, 2010Assignee: Texas Instruments IncorporatedInventors: William Todd Harrison, Xuening Li, Stefan Wlodzimierz Wiktor
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Publication number: 20090284322Abstract: Synchronously stackable double-edge modulated pulse width modulation generators are disclosed. An example pulse width modulation generator includes a ramp generator to generate first and second ramp signals that interact to form a virtual ramp signal; and a comparator module coupled to the ramp generator configured to produce a pulse width modulated signal based on a comparison between the virtual ramp signal and an input signal.Type: ApplicationFiled: May 19, 2008Publication date: November 19, 2009Inventors: William Todd Harrison, Xuening Li, Stefan Wlodzimierz Wiktor
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Publication number: 20080158922Abstract: A multi-phase power system including a plurality of Pulse Width Modulation (PWM) controllers is provided, including a first PWM controller and at least one second PWM controller. The first PWM controller is configured to generate at least one first output signal based on a first clock signal, and to insert at least one synchronizing pulse into the first clock signal, the synchronizing pulse having a predetermined characteristic differing from pulses of the first clock signal, and to provide the first clock signal including the synchronizing pulse to the second PWM controller. The second PWM controller is configured to generate at least one second output signal based on the first clock signal, and to synchronize the generation of the first and second output signals using the synchronizing pulse within the first clock signal, thereby maintaining a predetermined phase relationship between the first and second output signals.Type: ApplicationFiled: March 9, 2007Publication date: July 3, 2008Applicant: TEXAS INSTRUMENTS, INCORPORATEDInventors: William Todd Harrison, Xuening Li
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Publication number: 20080042634Abstract: A method and apparatus for use in a multi-phase power system. The power system is of the type having a plurality of Pulse Width Modulation (PWM) controllers including a first PWM controller and at least one second PWM controller. The first PWM controller generates at least one first PWM output signal based on a cyclic signal having a cyclically recurring parameter, and provides the cyclic signal including the cyclically recurring parameter to the second PWM controller. The second PWM controller generates at least one second PWM output signal based on the cyclic signal, and synchronizes the generation of the first and second output signals using the cyclically recurring parameter within the cyclic signal, thereby maintaining a predetermined phase relationship between the first and second output signals.Type: ApplicationFiled: April 2, 2007Publication date: February 21, 2008Applicant: TEXAS INSTRUMENTS, INCORPORATEDInventors: William Todd Harrison, Xuening Li, Stefan W. Wiktor, Larry Joe Wofford
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Patent number: 7332898Abstract: A method and apparatus for use in a multi-phase power system. The power system is of the type having a plurality of Pulse Width Modulation (PWM) controllers including a first PWM controller and at least one second PWM controller. The first PWM controller generates at least one first PWM output signal based on a cyclic signal having a cyclically recurring parameter, and provides the cyclic signal including the cyclically recurring parameter to the second PWM controller. The second PWM controller generates at least one second PWM output signal based on the cyclic signal, and synchronizes the generation of the first and second output signals using the cyclically recurring parameter within the cyclic signal, thereby maintaining a predetermined phase relationship between the first and second output signals.Type: GrantFiled: April 2, 2007Date of Patent: February 19, 2008Assignee: Texas Instruments IncorporatedInventors: William Todd Harrison, Xuening Li, Stefan W Wiktor, Larry Joe Wofford
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Patent number: 6791307Abstract: A current generator generates a non-linear output current whose temperature coefficient exhibits a prescribed non-linear-to-quasi-linear curvature when a control voltage range is restricted. This particular current characteristic enables a voltage reference employing the current generator for high-order curvature correction to produce an output voltage whose variation is extremely flat over its industry standard operational temperature range.Type: GrantFiled: October 4, 2002Date of Patent: September 14, 2004Assignee: Intersil Americas Inc.Inventor: William Todd Harrison
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Publication number: 20040066180Abstract: A current generator generates a non-linear output current whose temperature coefficient exhibits a prescribed non-linear-to-quasi-linear curvature when a control voltage range is restricted. This particular current characteristic enables a voltage reference employing the current generator for high-order curvature correction to produce an output voltage whose variation is extremely flat over its industry standard operational temperature range.Type: ApplicationFiled: October 4, 2002Publication date: April 8, 2004Applicant: Intersil Americas Inc.Inventor: William Todd Harrison
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Patent number: 6643145Abstract: A digital diode emulator (DDE) for a DC-DC converter increments a digital counter with a high frequency clock. For each inductor current cycle, the counter counts between turn-on and turn-off of the output switching circuit's lower switch. When the contents of the counter match a modification of a count latched from the previous inductor current cycle, a turn-off signal is supplied to the control logic. If the previous inductor current cycle's turn-off signal occurred late, the latched count is decremented by one bit. If the previous cycle's turn-off signal occurs early, the latched count is incremented by one bit. Over successive inductor current cycles, the digital diode emulator effectively ‘dithers’ the turn-off time of the switching circuit's lower switch about the zero-crossing point of the inductor current.Type: GrantFiled: July 26, 2002Date of Patent: November 4, 2003Assignee: Intersil Americas Inc.Inventor: William Todd Harrison