发明名称 |
Multiple-sampling circuit for measuring reflected voltage and discharge time of a transformer |
摘要 |
A multiple-sampling circuit is proposed for measuring a voltage signal and a discharge time of a transformer. Sampling signals are used for generating hold voltages by alternately sampling the reflected voltage from the transformer. A buffer amplifier generates a buffer voltage from the higher voltage of hold voltages. A sampling switch periodically conducts the buffer voltage to produce a voltage-feedback signal. The voltage-feedback signal is proportional to an output voltage of the switching circuit. A threshold signal added to the reflected voltage signal produces a level-shift reflected signal. A discharge-time signal is generated as the switching signal is disabled. The discharge-time signal is disabled once the level-shift signal is lower than the voltage-feedback signal. The pulse width of the discharge-time signal is therefore correlated to the discharge time of the transformer. The sampling signals are enabled to generate hold voltages only when the discharge-time signal is enabled.
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申请公布号 |
US2006133118(A1) |
申请公布日期 |
2006.06.22 |
申请号 |
US20040022167 |
申请日期 |
2004.12.21 |
申请人 |
YANG TA-YUNG;HUNG GUO-KIANG;LIN JENN-YU G |
发明人 |
YANG TA-YUNG;HUNG GUO-KIANG;LIN JENN-YU G. |
分类号 |
H02M3/335 |
主分类号 |
H02M3/335 |
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