发明名称 |
VOLATGE CONVERTING APPARATUS AND SUB-HARMONIC DETECTOR THEREOF |
摘要 |
A voltage converting apparatus and a sub-harmonic detector are disclosed. The sub-harmonic detector includes a pulse eliminating circuit, a counter, and a comparator. The pulse eliminating circuit receives a pulse width modulation (PWM) signal and a reference PWM signal having a same period. The PWM signal and reference PWM signal has a plurality of pulses and reference pulses respectively. The pulse eliminating circuit eliminates at least one part of the pulses which overlap with the reference pulses for generating a processed signal. The counter counts the processed signal and the PWM signal during a time period to obtain first and second counting values. The comparator compares the first and second counting values for detecting whether a sub-harmonic condition happens or not in the PWM signal. |
申请公布号 |
US2014063856(A1) |
申请公布日期 |
2014.03.06 |
申请号 |
US201313794817 |
申请日期 |
2013.03.12 |
申请人 |
EXCELLIANCE MOS CORPORATION |
发明人 |
HUANG FU-CHUN;CHOU HUNG-CHE;LIN PAO-CHUAN |
分类号 |
H02M3/335 |
主分类号 |
H02M3/335 |
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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