发明授权
- 专利标题: Signal offset cancellation
- 专利标题(中): 信号偏移消除
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申请号: US12723450申请日: 2010-03-12
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公开(公告)号: US07898313B1公开(公告)日: 2011-03-01
- 发明人: Tin H. Lai , Wilson Wong
- 申请人: Tin H. Lai , Wilson Wong
- 申请人地址: US CA San Jose
- 专利权人: Altera Corporation
- 当前专利权人: Altera Corporation
- 当前专利权人地址: US CA San Jose
- 代理机构: Ropes & Gray LLP
- 主分类号: H03F3/45
- IPC分类号: H03F3/45 ; H03L5/00
摘要:
Techniques and circuitry are provided for programmably controlling signal offsets in integrated circuitry. In one embodiment, an integrated circuit includes a signal offset cancellation circuit that is programmably selected to control the offset of signals on either one input/output or another input/output of an amplifier circuit. In one embodiment, a logic circuit is used to selectively couple a bank of current sources to one input/output or another input/output of a differential amplifier through a switching circuit. The bank of current sources may employed to control the signal offset on either input/output, or may be decoupled from all of the inputs/outputs when signal offset cancellation is not required.
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