发明授权
- 专利标题: Method and apparatus for settling and maintaining a DC offset
- 专利标题(中): 用于稳定和维持DC偏移的方法和装置
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申请号: US09515286申请日: 2000-02-29
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公开(公告)号: US06225848B1公开(公告)日: 2001-05-01
- 发明人: Keith A. Tilley , Raul Salvi , Enrique Ferrer , Atif A. Meraj , David J. Graham
- 申请人: Keith A. Tilley , Raul Salvi , Enrique Ferrer , Atif A. Meraj , David J. Graham
- 主分类号: H03K508
- IPC分类号: H03K508
摘要:
A DC offset correction loop (200) utilizes a sign bit generator (204), binary search stage (206), and a digital-to-analog converter (208) in its feedback path to correct for DC offsets at the input of a gain stage (202). When a correction value is obtained, it is applied and held (524) to compensate for the DC offset. When a programming event occurs (534), such as detecting an increase in DC offset beyond a threshold, detecting a significant temperature change, or passage of time, a new DC offset correction cycle is initiated.
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