公开(公告)号：US20170322582A1

公开(公告)日：2017-11-09

申请号：US15657535

申请日：2017-07-24

Applicant: QUALCOMM Incorporated

Inventor： Madjid Hafizi ,  Jie Xu ,  Xiaohua Kong ,  Nam V. Dang

IPC: G05F3/08 ,  H04L25/02

CPC classification number: G05F3/08 ,  H03F2200/03 ,  H04L25/0278 ,  H04L25/028

Abstract: A pre-driver circuit generates a driver bias signal based on a swing command, a driver impedance characteristic, and an input signal. A driver receives the driver bias signal and generates, in response, a driver signal having a swing and having an output impedance corresponding to the bias signal. Optionally, the driver receives power from a switchable one of multiple supply rails, according to the swing. Optionally, the driver has voltage controlled resistor elements and the driver bias signal is generated based on the swing command and a replica of the driver voltage controlled resistor elements.

公开(公告)号：US10817007B2

公开(公告)日：2020-10-27

申请号：US15657535

申请日：2017-07-24

Applicant: QUALCOMM Incorporated

Inventor： Madjid Hafizi ,  Jie Xu ,  Xiaohua Kong ,  Nam V. Dang

IPC: G06F3/08 ,  H04L25/02 ,  G05F3/08

Abstract: A pre-driver circuit generates a driver bias signal based on a swing command, a driver impedance characteristic, and an input signal. A driver receives the driver bias signal and generates, in response, a driver signal having a swing and having an output impedance corresponding to the bias signal. Optionally, the driver receives power from a switchable one of multiple supply rails, according to the swing. Optionally, the driver has voltage controlled resistor elements and the driver bias signal is generated based on the swing command and a replica of the driver voltage controlled resistor elements.