首页>
外国专利>
SYSTEM AND METHOD OF CALIBRATING POWER-ON-GATING WINDOW FOR A TIME-TO-DIGITAL CONVERTER (TDC) OF A DIGITAL PHASE LOCKED LOOP (DPLL)
SYSTEM AND METHOD OF CALIBRATING POWER-ON-GATING WINDOW FOR A TIME-TO-DIGITAL CONVERTER (TDC) OF A DIGITAL PHASE LOCKED LOOP (DPLL)
展开▼
机译:校准数字锁相环(DPLL)的时间数字转换器(TDC)的开机门窗的系统和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A system and method are disclosed related to calibrating a power-on gating window for a time-to-digital converter (TDC) of a digital phase locked loop (DPLL). The gating window is calibrated to ensure proper operation of the DPLL, while at the same time operating the TDC in a power efficient manner. In particular, the technique entails setting the width of the TDC gating window to a default value; operating the DPLL until the control loop is substantially locked; decreasing the width of the TDC gating window by a predetermined amount, while monitoring the phase error signal generated by the phase error device of the DPLL; determining the current width of the TDC gating window at substantially a time when the phase error arrives at or crosses a predetermined threshold; and increasing the current width of the TDC gating window by a predetermined amount to build in a margin of error for the operating width of the TDC gating window.
展开▼