公开(公告)号：US10148312B2

公开(公告)日：2018-12-04

申请号：US15072735

申请日：2016-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Theodore Ernest Yu ,  Yogesh Kumar Ramadass

IPC: H04B1/00 ,  H04B1/69

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.

公开(公告)号：US20170272116A1

公开(公告)日：2017-09-21

申请号：US15072735

申请日：2016-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Theodore Ernest Yu ,  Yogesh Kumar Ramadass

IPC: H04B1/69

CPC classification number: H04B1/69 ,  H02M1/44 ,  H02M3/155 ,  H02M3/156

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.

公开(公告)号：US09680375B2

公开(公告)日：2017-06-13

申请号：US14631388

申请日：2015-02-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Theodore Ernest Yu ,  Ali Motamedi ,  Dingkun Du ,  Sombuddha Chakraborty ,  Patrick Teterud ,  Keith Thomas Sanders, Jr.

IPC: H02M3/156 ,  H02M1/44 ,  H02M1/00

CPC classification number: H02M3/156 ,  H02M1/44 ,  H02M2001/0012

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.