发明名称 |
Linear dead-band-free digital phase detection |
摘要 |
A phase-locked loop includes a phase detector, a loop filter, a voltage controlled oscillator and a frequency divider arranged such that the phase detector generates a phase detector output signal as a function of a phase difference between the reference clock signal and the feedback signal; the loop filter generates a frequency control signal from the phase detector output signal; the voltage controlled oscillator generates a phase-locked loop output signal that has a frequency that is controlled by the frequency control signal; and the frequency divider generates the feedback signal from the phase-locked loop output signal. The phase-locked loop further includes one or more circuit elements that maintain an operating point of the phase detector such that, for a predetermined range of both positive and negative phase differences between the reference clock signal and the feedback signal, the output signal is generated as a substantially linear function of the phase difference between the reference clock signal and the feedback signal. |
申请公布号 |
US6985551(B1) |
申请公布日期 |
2006.01.10 |
申请号 |
US20000580632 |
申请日期 |
2000.05.30 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) |
发明人 |
MATTISSON SVEN;HAGBERG HANS;NILSSON MAGNUS |
分类号 |
H03D3/24;H03D13/00;H03L7/089;H03L7/197 |
主分类号 |
H03D3/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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