Low comment mode impedence differential driver and applications

Details Low comment mode impedence differential driver and applications Low comment mode impedence differential driver and applications

1999-04-07

2000-09-12

Luu, Matthew

Computer graphics processing and selective visual display system

Display driving control circuitry

345 98, 345100, G09G 500, G09G 336

Patent

active

061184381

ABSTRACT:
A low common mode impedance differential driver includes an independent current source, a switching module, a dependent current source, and a bias control circuit. The independent and dependent current sources are operably coupled to the switching module to provide first and second current paths through the switching module. The bias control circuit is operably coupled to the dependent current source and to the differential output produced by the switching module. The bias control circuit provides a control signal to the dependent current source that causes the common mode of the differential output to be maintained within a desired tolerance.

REFERENCES:
patent: 4721943 (1988-01-01), Stallkamp
patent: 4745485 (1988-05-01), Iwasaki

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