Patent · US Active

High-speed pre-driver and voltage level converter with built-in de-emphasis for HDMI transmit applications

US8542039B2 · kind B2 · utility

2Cited by

6References

24Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Miao Li · Shanghai, CN
Zhi Zhu · San Diego, US
Xiaohua Kong · San Diego, US
Nam V. Dang · San Diego, US

Key dates

Filing date	Nov 11, 2011
Grant date	Sep 24, 2013
Priority date	—
Expiry date	Dec 25, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04L25/0272
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

In an example, a high-speed pre-driver and voltage level converter with built-in de-emphasis for HDMI transmit applications is provided. An exemplary integrated circuit includes a serializer, a pre-driver coupled to receive a differential input from the serializer, and a driver. The pre-driver includes all-p-type metal-oxide-silicon (PMOS) cross-coupled level converter comprising four PMOS transistors and two de-emphasis PMOS transistors forming a de-emphasis tap coupled to the output of the cross-coupled level converter. The driver is coupled to the pre-driver output and is configured to receive a differential input from the pre-driver.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.