Patents by Inventor Theodore Ernest YU

Theodore Ernest YU 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).

  • Circuit and method to reduce fundamental and modulation spurs with spread spectrum
    Patent number: 10148312
    Abstract: A method of generating a spread spectrum signal is disclosed. The method includes selecting a first pseudorandom slope for a modulation curve. A current frequency on the modulation curve is selected. An oscillating signal is produced at the current frequency for a respective time. The current frequency is set to a next frequency on the modulation curve. The steps of producing an oscillating frequency and setting the current frequency to a next frequency are repeated until the current frequency is a final frequency on the modulation curve.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: December 4, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Theodore Ernest Yu, Yogesh Kumar Ramadass
  • CIRCUIT AND METHOD TO REDUCE FUNDAMENTAL AND MODULATION SPURS WITH SPREAD SPECTRUM
    Publication number: 20170272116
    Abstract: A method of generating a spread spectrum signal is disclosed. The method includes selecting a first pseudorandom slope for a modulation curve. A current frequency on the modulation curve is selected. An oscillating signal is produced at the current frequency for a respective time. The current frequency is set to a next frequency on the modulation curve. The steps of producing an oscillating frequency and setting the current frequency to a next frequency are repeated until the current frequency is a final frequency on the modulation curve.
    Type: Application
    Filed: March 17, 2016
    Publication date: September 21, 2017
    Inventors: Theodore Ernest Yu, Yogesh Kumar Ramadass
  • Switching mode power supply with adaptively randomized spread spectrum
    Patent number: 9680375
    Abstract: In described examples, a switching mode power supply includes an output filter, a driver, a pulse width modulator, and pulse adaptation circuitry. The output filter is configured to provide output of the switching mode power supply. The driver is coupled to the output filter and is configured to switch current to the output filter. The pulse width modulator is configured to generate pulses that control switching of current by the driver. The pulse width modulator includes spread spectrum logic configured to randomize timing of the pulses generated by the pulse width modulator. The pulse adaptation circuitry is configured to identify an instantaneous excursion of the output of the switching mode power supply beyond a predetermined threshold, and to modify the randomized timing of the pulses produced by the pulse width modulator based on the identified instantaneous excursion.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: June 13, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Theodore Ernest Yu, Ali Motamedi, Dingkun Du, Sombuddha Chakraborty, Patrick Teterud, Keith Thomas Sanders, Jr.
  • SWITCHING MODE POWER SUPPLY WITH ADAPTIVELY RANDOMIZED SPREAD SPECTRUM
    Publication number: 20150244269
    Abstract: In described examples, a switching mode power supply includes an output filter, a driver, a pulse width modulator, and pulse adaptation circuitry. The output filter is configured to provide output of the switching mode power supply. The driver is coupled to the output filter and is configured to switch current to the output filter. The pulse width modulator is configured to generate pulses that control switching of current by the driver. The pulse width modulator includes spread spectrum logic configured to randomize timing of the pulses generated by the pulse width modulator. The pulse adaptation circuitry is configured to identify an instantaneous excursion of the output of the switching mode power supply beyond a predetermined threshold, and to modify the randomized timing of the pulses produced by the pulse width modulator based on the identified instantaneous excursion.
    Type: Application
    Filed: February 25, 2015
    Publication date: August 27, 2015
    Inventors: Theodore Ernest YU, Ali MOTAMEDI, Dingkun DU, Sombuddha CHAKRABORTY, Patrick TETERUD, Keith Thomas SANDERS, JR.