Amplifiers – With semiconductor amplifying device – Including balanced to unbalanced circuits and vice versa
Patent
1999-06-17
2000-06-27
Pascal, Robert
Amplifiers
With semiconductor amplifying device
Including balanced to unbalanced circuits and vice versa
330258, 327 65, H03F 304, H03F 345, H03K 522
Patent
active
060811625
ABSTRACT:
An embodiment of the invention is directed to a method of automatically adjusting a common mode output level of a first differential amplifier that is connected to a first digital circuit, in response to variation in a trip point level of a second digital circuit. The second digital circuit includes a replicate of the first digital circuit to generate a trip point level that is equivalent to a trip point level of the first digital circuit. The invention may yield a single-ended digital signal whose duty cycle accurately tracks that of an input differential signal pair in a manner that is substantially independent of fabrication process skew.
REFERENCES:
patent: 4353059 (1982-10-01), Vaitkus
patent: 5047665 (1991-09-01), Burt
patent: 5374859 (1994-12-01), Doyle et al.
patent: 5990743 (1999-11-01), Gabara
Intel Corporation
Nguyen Patricia T.
Pascal Robert
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