公开(公告)号：US20180115286A1

公开(公告)日：2018-04-26

申请号：US15332830

申请日：2016-10-24

Applicant: SYNAPTICS INCORPORATED

Inventor： Yonggang CHEN ,  Sagar KUMAR

IPC: H03F1/30 ,  H03F3/195 ,  H04L25/03

CPC classification number: H04L25/03057 ,  H03F1/301 ,  H03F1/42 ,  H03F3/193 ,  H03F3/45197 ,  H03F2200/297 ,  H03F2200/447 ,  H03F2200/552

Abstract: Frequency characteristics of a peaking stage can vary depending on variations in the process used to fabricate the peaking stage. For example, depending on the batch of wafers and where on a wafer the peaking stage is formed, the capacitors and resistors may have different values, thereby changing the frequency characteristics of the peaking stage. The embodiments herein describe a peaking stage that is invariant of the process variation. That is, one or more of the frequency characteristics of the peaking stages do not vary as the values of a capacitor or resistor change. As such, peaking stages formed in different process corners on the wafer have the same frequency characteristics, and thus, function in a similar manner.

公开(公告)号：US20170288615A1

公开(公告)日：2017-10-05

申请号：US15085889

申请日：2016-03-30

Applicant: SYNAPTICS INCORPORATED

Inventor： Kevin FRONCZAK ,  Murat OZBAS ,  Yonggang CHEN

IPC: H03F1/30 ,  H03F3/45

CPC classification number: H03F1/30 ,  H03F3/45071 ,  H03F3/45475 ,  H03F3/45982 ,  H03F2200/375 ,  H03F2200/447 ,  H03F2203/45048 ,  H03F2203/45286 ,  H03F2203/45288 ,  H03F2203/45594 ,  H03F2203/45604

Abstract: An apparatus, system, and method are disclosed for compensating input offset of an amplifier having first and second amplifier output nodes. The method comprises generating a proportional-to-absolute temperature (PTAT) current, generating a complementary-to-absolute temperature (CTAT) current, and selecting, based on the input offset, one of the first and second amplifier output nodes into which a compensation current is to be coupled. The compensation current is based on a selected one of the PTAT current and CTAT current.