公开(公告)号：US20250028341A1

公开(公告)日：2025-01-23

申请号：US18498927

申请日：2023-10-31

Applicant: QUALCOMM Incorporated

Inventor： Bengt Stefan GUSTAVSSON ,  Louis Dominic OLIVEIRA ,  Tomer SARAF ,  Robert John LITTRELL ,  Ganesh KIRAN ,  William Wei-Ting KUO

IPC: G05F1/56 ,  G06F1/10 ,  H03K5/125 ,  H03K5/24

Abstract: Aspects relate to mechanisms for detecting a voltage level on a data communication interface between a slave device and a host device. Based on the detected voltage level, the slave device may respond to the host device on the data communication interface at the detected voltage level. In some examples, the slave device may include a circuit configured to toggle between a first voltage level and a second voltage level to provide one of the first voltage level or the second voltage level corresponding to the detected voltage level on the data communication interface.

公开(公告)号：US20170250662A1

公开(公告)日：2017-08-31

申请号：US15443889

申请日：2017-02-27

Applicant: QUALCOMM Incorporated

Inventor： William COPE ,  Julian ASCHIERI ,  Tomer SARAF

IPC: H03F3/26 ,  H03F3/187

CPC classification number: H03F3/187 ,  H03F1/523 ,  H03F3/185 ,  H03F3/2173 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/331 ,  H03F2200/426 ,  H03F2200/78 ,  H03F2203/45514 ,  H03M3/49 ,  H03M3/492

Abstract: Certain aspects of the present disclosure provide amplifiers. Certain aspects of the present disclosure provide methods and apparatus for protecting an such amplifiers, for example an audio amplifier, or a delta-sigma modulator from saturation. One example amplifier generally includes an output stage comprising a plurality of transistors; and a feedback network having an input coupled to an output of the output stage and comprising a plurality of integrators connected in series. At least one of the plurality of integrators generally includes an operational amplifier having an input and an output, a first resistive element coupled to the input of the operational amplifier, a capacitive element coupled between the input and the output of the operational amplifier; and a first switch coupled between the input and the output of the operational amplifier. For certain aspects, the amplifier may be a class-D amplifier or a direct digital feedback amplifier (DDFA).