公开(公告)号：US11356082B2

公开(公告)日：2022-06-07

申请号：US17119604

申请日：2020-12-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yinglai Xia ,  Shailendra Kumar Baranwal ,  Yogesh Kumar Ramadass ,  Junmin Jiang

IPC: H03K4/08 ,  H03L7/089 ,  H03L7/099 ,  H03F3/217 ,  H03L7/081 ,  H03K19/20

Abstract: A device includes a first ramp generator having a first ramp generator output configured to provide a first ramp, a second ramp generator having a second ramp generator output configured to provide a second ramp, and a third ramp generator having a third ramp generator output configured to provide a third ramp. The first ramp is a sawtooth voltage waveform having a first common mode voltage and a first peak-to-peak voltage. The second ramp is a sawtooth voltage waveform having a second common mode voltage and a second peak-to-peak voltage. The third ramp is a sawtooth voltage waveform having a third common mode voltage and a third peak-to-peak voltage. A frequency of the second ramp is approximately equal to a frequency of the third ramp, and the frequency of the third ramp is approximately double a frequency of the first ramp.

公开(公告)号：US20240088878A1

公开(公告)日：2024-03-14

申请号：US18512158

申请日：2023-11-17

Applicant: Texas Instruments Incorporated

Inventor： Yinglai Xia ,  Shailendra Kumar Baranwal ,  Yogesh Kumar Ramadass ,  Junmin Jiang

IPC: H03K4/08 ,  H03F3/217 ,  H03L7/081 ,  H03L7/089 ,  H03L7/099

CPC classification number: H03K4/08 ,  H03F3/2173 ,  H03L7/081 ,  H03L7/0891 ,  H03L7/099 ,  H03F2200/03 ,  H03K19/20

Abstract: In one example, an apparatus comprises a power stage having a first power stage input, a second power stage input, and a power stage output. The apparatus also comprises a modulator circuit having a first ramp input, a second ramp input, a modulator input, a first modulator output, and a second modulator output, the first modulator output coupled to the first power stage input, and the second modulator output coupled to the second power stage input. The apparatus also comprises a multi-level ramp generator having a first ramp output and a second ramp output, the first ramp output coupled to the first ramp input, and the second ramp output coupled the second ramp input.

公开(公告)号：US11824543B2

公开(公告)日：2023-11-21

申请号：US17832280

申请日：2022-06-03

Applicant: Texas Instruments Incorporated

Inventor： Yinglai Xia ,  Shailendra Kumar Baranwal ,  Yogesh Kumar Ramadass ,  Junmin Jiang

IPC: H03K4/08 ,  H03L7/089 ,  H03L7/099 ,  H03F3/217 ,  H03L7/081 ,  H03K19/20

CPC classification number: H03K4/08 ,  H03F3/2173 ,  H03L7/081 ,  H03L7/0891 ,  H03L7/099 ,  H03F2200/03 ,  H03K19/20

Abstract: A device includes a first ramp generator having a first ramp generator output configured to provide a first ramp, a second ramp generator having a second ramp generator output configured to provide a second ramp, and a third ramp generator having a third ramp generator output configured to provide a third ramp. The first ramp is a sawtooth voltage waveform having a first common mode voltage and a first peak-to-peak voltage. The second ramp is a sawtooth voltage waveform having a second common mode voltage and a second peak-to-peak voltage. The third ramp is a sawtooth voltage waveform having a third common mode voltage and a third peak-to-peak voltage. A frequency of the second ramp is approximately equal to a frequency of the third ramp, and the frequency of the third ramp is approximately double a frequency of the first ramp.

公开(公告)号：US10965279B2

公开(公告)日：2021-03-30

申请号：US16360927

申请日：2019-03-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yogesh Kumar Ramadass ,  Bhushan Talele ,  Shailendra Kumar Baranwal ,  Yinglai Xia ,  Junmin Jiang

IPC: H03F3/38 ,  H03K4/08 ,  H03F3/217 ,  H02M3/07 ,  H03L7/081 ,  H03L7/093 ,  H03L7/099

Abstract: A multi-level ramp generator comprises three ramp generators. The first ramp generator generates a first ramp signal, comprising a sawtooth voltage waveform with a first common mode voltage and a first peak to peak voltage. The second ramp generator generates a second ramp signal, comprising a sawtooth voltage waveform with a second common mode voltage and a second peak-to-peak voltage. The third ramp generator generates a third ramp signal, comprising a sawtooth voltage waveform with a third common mode voltage and the second peak-to-peak voltage. The second and third ramp signals are in phase with each other and the first ramp signal is 180° out of phase with the second and third ramp signals. In some implementations, each of the first, second, and third ramp generators comprise a respective delay locked loop and a respective voltage controlled oscillator.

公开(公告)号：US20220302908A1

公开(公告)日：2022-09-22

申请号：US17832280

申请日：2022-06-03

Applicant: Texas Instruments Incorporated

Inventor： Yinglai Xia ,  Shailendra Kumar Baranwal ,  Yogesh Kumar Ramadass ,  Junmin Jiang

IPC: H03K4/08 ,  H03L7/089 ,  H03L7/099 ,  H03F3/217 ,  H03L7/081

Abstract: A device includes a first ramp generator having a first ramp generator output configured to provide a first ramp, a second ramp generator having a second ramp generator output configured to provide a second ramp, and a third ramp generator having a third ramp generator output configured to provide a third ramp. The first ramp is a sawtooth voltage waveform having a first common mode voltage and a first peak-to-peak voltage. The second ramp is a sawtooth voltage waveform having a second common mode voltage and a second peak-to-peak voltage. The third ramp is a sawtooth voltage waveform having a third common mode voltage and a third peak-to-peak voltage. A frequency of the second ramp is approximately equal to a frequency of the third ramp, and the frequency of the third ramp is approximately double a frequency of the first ramp.

公开(公告)号：US10886881B2

公开(公告)日：2021-01-05

申请号：US16360703

申请日：2019-03-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yinglai Xia ,  Shailendra Kumar Baranwal ,  Junmin Jiang ,  Yogesh Kumar Ramadass

IPC: H03F3/45 ,  H03F3/217 ,  H02M3/07

Abstract: An amplifier comprises eight transistors: the first coupled to a linked node and to a positive output node, the second coupled to the linked node and to a negative output node, the third coupled to the positive output node and a common potential, the fourth coupled to the negative output node and the common potential, the fifth coupled to a battery node, the sixth coupled to the fifth transistor and to the positive output node, the seventh coupled to the battery node, and the eighth coupled to the seventh transistor and to the negative output node. The amplifier also includes a charge pump to convert the battery voltage to an increased voltage on the linked node. The charge pump includes capacitors and operates at a lower frequency in lower power mode and a higher frequency in higher power mode to increase power provided to the linked node.