Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2005-12-30
2008-11-11
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S261000
Reexamination Certificate
active
07449949
ABSTRACT:
A data amplifying circuit for an output driver has a swing level that is controllable according to an operation mode. The data amplifying circuit includes a mode responding circuit supplying an additional source current to a source node of an amplifying circuit in response to a mode selection signal. The mode responding circuit controls the supply of the additional source current in accordance with an operation mode. Another data amplifying circuit of a semiconductor device, according to the invention, includes a small-swing amplifier and a full-swing amplifier. The small-swing amplifier causes a swing level of the output signal to be relatively smaller, while the full-swing amplifier causes the output signal swing level be relatively larger. The small-swing and full-swing amplifiers are alternatively enabled in response to the mode selection signal.
REFERENCES:
patent: 5381113 (1995-01-01), Kimura
patent: 7061323 (2006-06-01), Morgan et al.
patent: 2003-223799 (2003-08-01), None
patent: 10-1999-0048151 (1999-07-01), None
patent: 10-1999-0048158 (1999-07-01), None
patent: 10-2000-0028867 (2000-05-01), None
Choi Jung Hwan
Sohn Young Soo
Mills & Onello LLP
Nguyen Khanh V
Samsung Electronics Co,. Ltd.
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