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The cell-aware test (CAT) methodology was previously proposed to target cell-internal faults that cannot be easily detected by gate-level stuck-at fault (SAF) patterns generated by conventional ATPG. It was shown to reduce the defect level on CMOS-based designs, with the help of detailed defect injected transistor-level circuit simulation and defect-enhanced SAF ATPG. The detailed transistor-level...
Active capacitor with long lifetime film capacitor can be adopted to replace the short lifetime electrolytic capacitors to improve the reliability of the power converter. However, the conventional active capacitor suffers from the complicated control method. Based on the derived mathematical equations of the active capacitor, a ripple-based duty cycle modulation (RDCM) method for the active capacitor...
A 360° all-pass tunable phase shifter is proposed in this study. The device consists of three high-pass filters and one 180° phase shifter based on a high-pass/low-pass filter structure. Diode switches are used instead of their FET counterparts. The phase shifter needs only approximately half of the bias power sources to significantly reduce the complexity of the circuit. It adopts five sets of controlling...
A simple and effective stepping on-time adjustment (SOTA) method with status judgment for interleaved multichannel critical mode (CRM) boost-type power factor correction (PFC) converters is proposed. The boost-type PFC converter with CRM operation is commonly used for ac–dc conversion because of its circuit simplicity and high efficiency. The interleaved multichannel PFC converter becomes the trend...
In this paper, the active capacitor is proposed to replace the electrolytic capacitor of the power factor correction (PFC) converter. Conventionally, a bulky electrolytic capacitor is connected in parallel with the output stage of the PFC converter to reduce the output ripple voltage. However, the electrolytic capacitor would shorten the lifetime and reduce the reliability of the PFC converter. Thus,...
This paper proposes a stepping on-time adjustment (SOTA) control method with status judgment for multichannel interleaving critical mode (CRM) boost PFC converter. The interleaved control is a trend for high power applications. However, conventional interleaved methods are complicated to implement when more than two channels are required. The SOTA method with status judgment is proposed to simplify...
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