Invention Grant
- Patent Title: Voltage-mode driver with pre-emphasis
- Patent Title (中): 电压模式驱动器,预加重
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Application No.: US12979337Application Date: 2010-12-28
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Publication No.: US08415986B2Publication Date: 2013-04-09
- Inventor: Sumantra Seth , Rajavelu Thinakaran
- Applicant: Sumantra Seth , Rajavelu Thinakaran
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Alan A. R. Cooper; Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: H03B1/00
- IPC: H03B1/00 ; H03K3/00

Abstract:
A voltage-mode driver circuit supporting pre-emphasis includes multiple resistors, and multiple transistors operated as switches. Control signals operating the transistors represent a logic level of an input signal to the driver circuit. To generate a pre-emphasized output, the transistors are operated to connect a parallel arrangement of the resistors between output terminals of the driver and corresponding constant reference potentials. To generate an output in the steady-state, the transistors are operated to connect some of the resistors across the output terminals of the driver, thereby reducing the output voltage. A desired output impedance of the driver, and a desired level of pre-emphasis are obtained by appropriate selection of the resistance values of the resistors. The current consumption of the driver is less in the steady-state than in the pre-emphasis mode.
Public/Granted literature
- US20120161816A1 VOLTAGE-MODE DRIVER WITH PRE-EMPHASIS Public/Granted day:2012-06-28
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