公开(公告)号：US20170201267A1

公开(公告)日：2017-07-13

申请号：US15426506

申请日：2017-02-07

Applicant: INPHI CORPORATION

Inventor： Michael LE ,  James GORECKI ,  Jamal RIANI ,  Jorge PERNILLO ,  Amber TAN ,  Karthik GOPALAKRISHNAN ,  Belal HELAL ,  Chang-Feng LOI ,  Irene QUEK ,  Guojun REN

IPC: H03M1/38 ,  H03M1/12 ,  H03L7/10 ,  H04L25/03

CPC classification number: H03M1/38 ,  H03M1/0604 ,  H03M1/1038 ,  H03M1/121 ,  H03M1/1215 ,  H03M1/1245 ,  H03M1/468 ,  H04L25/03012 ,  H04L25/03019 ,  H04L25/03878

Abstract: In an example, the present invention provides an analog to digital converter device for a high speed data transmission from 1 GS-s to 100 GS-s, although there can be other variations. In an example, the device has an input receiver device coupled to a transimpedance amplifier. In an example, the transimpedance amplifier is coupled to an input stream of data at 10 GHz to 100 GHz, or other variations.

公开(公告)号：US20210297294A1

公开(公告)日：2021-09-23

申请号：US17224835

申请日：2021-04-07

Applicant: INPHI CORPORATION

Inventor： Dragos CARTINA ,  Ankit BHARGAV ,  Jamal RIANI ,  Wen-Sin LIEW ,  Yu LIAO ,  Chang-Feng LOI

IPC: H04L25/03 ,  H04L25/02 ,  H04L25/49 ,  G01R19/25 ,  G01R13/34 ,  H03F1/32

Abstract: A device and method of operation for digital compensation of dynamic distortion. The transmitter device includes at least a digital-to-analog converter (DAC) connected to a lookup table (LUT), a first shift register, and a second shift register. The method includes iteratively adjusting the input values via the LUT to induce changes in the DAC output that compensate for dynamic distortion, which depends on precursors, current cursors, and postcursors. More specifically, the method includes producing and capturing average output values for each possible sequence of three symbols using the shift register and LUT configuration. Then, the LUT is updated with estimated values to induce desired output values that are adjusted to eliminate clipping. These steps are performed iteratively until one or more check conditions are satisfied. This method can also be combined with techniques such as equalization, eye modulation, and amplitude scaling to introduce desirable output signal characteristics.