发明授权
US08237475B1 Techniques for generating PVT compensated phase offset to improve accuracy of a locked loop
有权
用于产生PVT补偿相位偏移以提高锁定环路精度的技术
- 专利标题: Techniques for generating PVT compensated phase offset to improve accuracy of a locked loop
- 专利标题(中): 用于产生PVT补偿相位偏移以提高锁定环路精度的技术
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申请号: US12248031申请日: 2008-10-08
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公开(公告)号: US08237475B1公开(公告)日: 2012-08-07
- 发明人: Pradeep Nagarajan , Sean Shau-Tu Lu , Chiakang Sung , Joseph Huang , Yan Chong
- 申请人: Pradeep Nagarajan , Sean Shau-Tu Lu , Chiakang Sung , Joseph Huang , Yan Chong
- 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
- 代理商 Steven J. Cahill
- 主分类号: H03L7/06
- IPC分类号: H03L7/06
摘要:
A circuit includes a locked loop and a phase offset circuit. The locked loop generates first control signals for controlling a first delay in the locked loop. The phase offset circuit delays an input signal by a second delay that is controlled by second control signals to generate a delayed signal. The phase offset circuit generates the second control signals by adjusting the first control signals to increase the accuracy of the delayed signal with respect to a target phase. The second control signals compensate for at least a portion of a change in the second delay that is caused by a variation in at least one of a process, a supply voltage, and a temperature of the circuit.
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