Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-10-23
2008-09-09
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S253000, C330S257000
Reexamination Certificate
active
07423486
ABSTRACT:
A differential amplifier formed on a silicon-on-insulator substrate, including means to prevent the bodies of its differential input transistors from charging to unwanted potentials in the standby state. In one aspect of the invention, the means takes the form of switching transistors inserted between the differential input transistors and their loads. In another aspect of the invention, the means takes the form of switching transistors inserted between the sources and bodies of the differential input transistors. In another aspect of the invention the means is a regulator section that holds the bodies of the differential input transistors at an appropriate potential level.
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patent: 6018267 (2000-01-01), Tran et al.
patent: 6326847 (2001-12-01), Xu
patent: 6346858 (2002-02-01), Forbes
patent: 6873209 (2005-03-01), Takata et al.
patent: 7102439 (2006-09-01), Heightley et al.
patent: 8-213564 (1996-08-01), None
patent: 9-45883 (1997-02-01), None
patent: 2001-23376 (2001-01-01), None
Nguyen Khanh V
Oki Electric Industry Co. Ltd.
Studebaker Donald R.
Studebaker & Brackett PC
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