发明授权
- 专利标题: Dynamic phase selector phase locked loop circuit
- 专利标题(中): 动态相位选择器锁相环电路
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申请号: US560013申请日: 1995-11-17
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公开(公告)号: US5646968A公开(公告)日: 1997-07-08
- 发明人: Janos Kovacs , Ronald Kroesen , Kevin McCall
- 申请人: Janos Kovacs , Ronald Kroesen , Kevin McCall
- 申请人地址: MA Norwood
- 专利权人: Analog Devices, Inc.
- 当前专利权人: Analog Devices, Inc.
- 当前专利权人地址: MA Norwood
- 主分类号: H03K3/0231
- IPC分类号: H03K3/0231 ; H03K3/03 ; H03L7/081 ; H03L7/087 ; H03L7/099 ; H03L7/14 ; H03D3/24
摘要:
A dynamic phase selector phase locked loop circuit includes: an A/D converter for receiving an input to be sampled; a phase detection circuit for determining the phase error between the input signal and a clock signal; a clock circuit, responsive to the phase detection circuit, for providing the clock signal to the A/D converter for timing the sampling of the input signal; the clock circuit including a delay circuit having a number of delay taps; and a phase selector circuit, responsive to the phase detection circuit, for initially gating the clock signals to the A/D converter from the clock circuit, and enabling one of the delay taps to dynamically adjust the phase of the clock signal and reduce the initial phase error.
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