发明名称 |
Gain calibration of a digital controlled oscillator |
摘要 |
A novel apparatus for and a method of estimating, calibrating and tracking in real-time the gain of a radio frequency (RF) digitally controlled oscillator (DCO) in an all-digital phase locked loop (ADPLL). Precise setting of the inverse DCO gain in the ADPLL modulating path allows direct wideband frequency modulation that is independent of the ADPLL loop bandwidth. The gain calibration technique is based on a steepest descent iterative algorithm wherein the phase ADPLL error is sampled and correlated with the modulating data to generate a gradient. The gradient is then scaled and added to the current value of the DCO gain multiplier.
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申请公布号 |
US7466207(B2) |
申请公布日期 |
2008.12.16 |
申请号 |
US20070619529 |
申请日期 |
2007.01.03 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
STASZEWSKI ROBERT B.;FEYGIN GENNADY;ELIEZER OREN E.;LEIPOLD DIRK |
分类号 |
H03C3/06;H03L7/091;H03L7/099 |
主分类号 |
H03C3/06 |
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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