Line driver with active termination

Details Line driver with active termination Line driver with active termination

2006-03-28

2006-03-28

Chang, Daniel (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S026000, C327S108000

Reexamination Certificate

active

07019552

ABSTRACT:
The line driver with active termination includes: a differential amplifier having an inverting output terminal, a non-inverting output terminal, an inverting input terminal, and a non-inverting input terminal; a first resistor unit coupled to the inverting input terminal; a impedance matching resistor unit coupled to the non-inverting output terminal; and a resistive feedback network, having a plurality of resistors in symmetric configuration. The resistive feedback network further includes: a second resistor unit coupled to the impedance matching resistor unit and the inverting input terminal; a third resistor unit coupled to the non-inverting output terminal and the inverting input terminal; a fourth resistor unit coupled to the impedance matching resistor unit and the inverting input terminal; and a fifth resistor unit coupled to the inverting output terminal and the inverting input terminal. Each of the resistor units and the impedance matching resistor unit includes a plurality of resistors in symmetric configuration.

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patent: 010045720 (2002-04-01), None
Bram Nauta et. al.,Analog Line Driver with Adaptive Impedance Matching,IEEE Journal of Solid-State Circuits, vol. 33, No. 12, Dec. 1998, pp. 1992-1998.
M. Corsi et. al.,An ADSL Central Office Analog Front-End Integrating Actively-Terminated Line Driver, Receiver and Filters.,2001 IEEE International Sold-State Circuits Conference.
Faramarz Sabouri et. al.,A 740mW ADSL Line Driver for Central Office with 75dB MTPR,2002 IEEE International Solid-State Circuits Conference.

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