公开(公告)号：US11309814B2

公开(公告)日：2022-04-19

申请号：US17101910

申请日：2020-11-23

Applicant: Texas Instruments Incorporated

Inventor： Michael Edwin Butenhoff ,  Rakesh Raja ,  Nicholas James Oborny

IPC: H02P7/285 ,  H03K17/16

Abstract: Enhanced motor power control circuitry is presented herein. In one implementation, a circuit includes power transistor elements in a half-bridge arrangement configured to selectively switch current for a phase of a motor according to control signals applied to corresponding gate terminals. The circuit also includes control circuitry configured to produce the control signals to achieve target states among the power transistor elements. The control signals have ramp rates determined based at least on polarities of the current through the power transistor elements during inactive states.

公开(公告)号：US10651803B2

公开(公告)日：2020-05-12

申请号：US15816369

申请日：2017-11-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Seung Bae Lee ,  Michael Edwin Butenhoff ,  Sudhir Nagaraj

IPC: H03F3/45 ,  H03F1/26 ,  H03F1/34

Abstract: Reducing noise for an amplifier-based system circuit that comprises a first differential input pair and a second differential input pair, a first input stage circuit connected to the first differential input pair, wherein the first input stage is configured with a first transconductance value, a second input stage circuit connected to the second differential input pair, wherein the second input stage is configured with a second transconductance value that is less than the first transconductance value, a transimpedance circuit coupled to the first input stage circuit and the second input stage circuit, and a feedback loop circuit coupled to the transimpedance circuit and to the second differential input pair, wherein the feedback loop circuit is not connected to the first differential input pair.