公开(公告)号：US20210184663A1

公开(公告)日：2021-06-17

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 ,  H03L7/081 ,  H03F3/217

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：US20200313549A1

公开(公告)日：2020-10-01

申请号：US16837208

申请日：2020-04-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yongbin CHU ,  Yogesh Kumar RAMADASS

IPC: H02M1/44 ,  H03H11/12 ,  H02M3/335 ,  H02M1/12

Abstract: In some examples, a circuit includes an amplifier, a resistor, and a damping network. The amplifier has an amplifier output and first and second amplifier inputs. The first amplifier input is adapted to be coupled to a first terminal, and the second amplifier input is configured to receive a reference voltage. The resistor is coupled between the amplifier output and the first amplifier input. The damping network is coupled between the amplifier output and the first terminal.

公开(公告)号：US20200304080A1

公开(公告)日：2020-09-24

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: H03F3/217 ,  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.