Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1998-03-04
2000-04-04
Shingleton, Michael B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330253, 330258, 330259, 330 9, 330277, H03F 345
Patent
active
060466383
ABSTRACT:
A receive amplifier for high-speed data has a differential input stage with a very wide common-mode rejection range and low offset voltage. This input stage interfaces the differential data signals to be received. The input stage is a dual complementary differential configuration of ten MOS transistors preferably connected to provide a pair of differential inputs, a pair of differential outputs, and a single common-mode feedback input. The latter feedback input is used in the preferred embodiment to achieve balance and high common-mode rejection. Two-transistor CMOS inverters are preferably used both as amplifying stages after the input stage and as a feedback amplifier. In alternative embodiments, the nodes connected to the feedback input are instead reconnected to fixed voltages, typically one of the supply voltages or a fixed intermediate voltage, to form two independent amplifiers, one for each input node.
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patent: 4958133 (1990-09-01), Bazes
patent: 5252868 (1993-10-01), Miida et al.
patent: 5381112 (1995-01-01), Rybicki
patent: 5703532 (1997-12-01), Shin et al.
Nortel Networks Corporation
Shingleton Michael B.
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