发明授权
- 专利标题: Low distortion current switches for high speed current steering digital-to-analog converters
- 专利标题(中): 低失真电流开关用于高速电流转向数模转换器
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申请号: US10724645申请日: 2003-12-01
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公开(公告)号: US06833801B1公开(公告)日: 2004-12-21
- 发明人: Geir Sigurd Ostrem , Paul W. Kalthoff
- 申请人: Geir Sigurd Ostrem , Paul W. Kalthoff
- 主分类号: H03M166
- IPC分类号: H03M166
摘要:
Low distortion current switches for high speed current steering digital-to-analog converters. The current switches use a compensation method for improving the spurious peformance of a CMOS current steering DAC for high output frequencies caused by the capacitance of the common node of the switch transistors. For this purpose, a replica switch is provided, with the voltage change on the common node of the replica switch being used to provide a corresponding charge to the common node of the main switch in an amount equal to the charge needed to change the voltage on the common node of the main switch by the same amount as the voltage change on the common node of the replica switch. Multiple embodiments are disclosed.
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