发明授权
US07358783B1 Voltage, temperature, and process independent programmable phase shift for PLL
有权
PLL的电压，温度和过程独立的可编程相移
- 专利标题： Voltage, temperature, and process independent programmable phase shift for PLL
- 专利标题（中）： PLL的电压，温度和过程独立的可编程相移
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申请号： US10400191申请日： 2003-03-25
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公开(公告)号： US07358783B1公开(公告)日： 2008-04-15
- 发明人: Bonnie I. Wang , Joseph Huang , Chiakang Sung , Xiaobao Wang , In Whan Kim , Wayne Yeung , Khai Nguyen
- 申请人： Bonnie I. Wang , Joseph Huang , Chiakang Sung , Xiaobao Wang , In Whan Kim , Wayne Yeung , Khai Nguyen
- 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
- 代理商 Jeffrey H. Ingerman; Chia-Hao La
- 主分类号： H03L7/095
- IPC分类号： H03L7/095
摘要：
A circuit provides a programmable phase shift feature, where the phase shift is programmably selectable by a user. This circuitry may be incorporated in a programmable logic device (PLD) or field programmable gate array (FPGA) to provide additional programmability features. The programmable phase shift circuitry may be implemented within a phase locked loop (PLL) or delay locked loop (DLL) circuit. In an implementation, the programmable phase shift circuitry is implemented using two programmable counters.