Method and apparatus for controlling the common-mode output volt

Details Method and apparatus for controlling the common-mode output volt Method and apparatus for controlling the common-mode output volt

1998-02-19

1999-08-17

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 65, 330258, H03K 522

Patent

active

059399040

ABSTRACT:
A method and device for controlling the common-node output voltage of a differential buffer is disclosed. According to the invention, the common-mode output voltage of the differential buffer is controlled to a desired value by supplying a first current to the output of the differential buffer and supplying a second current to the output of the differential buffer, the second current being opposite in polarity and lower in magnitude than the first current. The common-mode output voltage of the differential buffer is sensed and an adjustment current is added to the second current to adjust the common-mode output voltage to the desired value.

REFERENCES:
patent: 4904953 (1990-02-01), McCormack
patent: 5239210 (1993-08-01), Scott
patent: 5281924 (1994-01-01), Maloberti et al.
patent: 5319316 (1994-06-01), Fensch
patent: 5475323 (1995-12-01), Harris et al.
patent: 5491447 (1996-02-01), Goetschel et al.
patent: 5703532 (1997-12-01), Shin et al.

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