发明公开
EP0587265A1 Cross coupled op-amp input transconductance reduction
失效
KreuzgekoppelterOperationverstärkermit reduzierter Eingangstranskonduktanz。
- 专利标题： Cross coupled op-amp input transconductance reduction
- 专利标题（中）： KreuzgekoppelterOperationverstärkermit reduzierter Eingangstranskonduktanz。
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申请号： EP93302343.4申请日： 1993-03-26
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公开(公告)号： EP0587265A1公开(公告)日： 1994-03-16
- 发明人: Wile, Donald T.
- 申请人： NATIONAL SEMICONDUCTOR CORPORATION
- 申请人地址： 2900 Semiconductor Drive, P.O. Box 58090 Santa Clara, California 95052-8090 US
- 专利权人： NATIONAL SEMICONDUCTOR CORPORATION
- 当前专利权人： NATIONAL SEMICONDUCTOR CORPORATION
- 当前专利权人地址： 2900 Semiconductor Drive, P.O. Box 58090 Santa Clara, California 95052-8090 US
- 代理机构： Horton, Andrew Robert Grant
- 优先权： US926728 19920807
- 主分类号： H03F3/45
- IPC分类号： H03F3/45 ; H03F1/32
摘要：
A monolithic silicon, planar epitaxial, PN junction isolated integrated circuit employing an input stage for an operational amplifier in which the input stage displays reduced transconductance. This provides a means for reducing the size of the amplifier compensation capacitor which typically requires the most chip area of any circuit component. The transconductance reduction is achieved by forming the input stage from ratioed plural collector lateral transistors (15,16) which drive a current mirror load (17). The plural collectors are cross-coupled to the current mirror load and the collector ratio determines the transconductance reduction.
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