专利名称：Static method to negate offset voltages in CMOS operational amplifiers
松花江上简谱>军舰进行曲发明人：Eugene R. Bukowski, Jr.
luciano pavarottimy logo申请号：US07/265113
申请日：19881031
公开号：US04948992A
becoming a legend生平第一次放下矜持公开日：
19900814
专利内容由知识产权出版社提供
摘要：Disclosed is a generator and method for using the generator to negate offset voltages in operational amplifiers. The generator includes an operational amplifier (op amp) whose input stage includes a current source coupled to a differential pair of input devices. The physical characteristics of the devices are such that an intentional offset voltage greater than the normal op amp offset voltage is provided in the input stage. The output terminal of the generator op amp is connected to the substrate terminal of one of the input devices. The offset voltages of other op amps can be negated by interconnecting the substrate terminal of one device in each input differential pair to the output terminal of the generator op amp and creating an intentional offset voltage in the input differential pair of each op amp.
申请人：INTERNATIONAL BUSINESS MACHINES CORPORATION
代理人：Joscelyn G. Cockburn
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