| 摘要 |
PROBLEM TO BE SOLVED: To provide a phase detecting method of sample-and-hold to attain a reduction of a spurious output and provide a phase detector using the method. SOLUTION: After charging a ramp node (502) to a first voltage level following a sampling time (606) of a phase detector (500) of sample-and-hold, during a pre-charging time (610) of a hold period (614), a leakage current at a SH switch (514) is reduced with pre-charging the node (502) to a second voltage level, so that voltage drifts are minimized and a reduction of a spurious of the detector (500) is attained. |
