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Unpredictable continuous conduction mode switching frequency variation that occurs commonly in ripple-based control can lead to serious electronic–magnetic interface noise problems and thus increase the effort required for designing noise filters. Sensorless load current correction and dynamic tolerance window techniques are proposed in this paper to reduce the frequency variations caused by conduction...
This paper presents an integrated sigma-delta noise-suppression buck converter using a discrete-time second order single-bit sigma-delta modulator (DT-SDM2). The context includes the description of small signal analysis and circuit design flow. The DT-SDM2 buck converter was designed and fabricated with a standard TSMC 0.35μm 3.3V CMOS process. The operating frequency of the proposed DT-SDM2 ranges...
An integrated sigma-delta noise-shaped buck converter that uses a discrete-time second order single-bit sigma-delta modulator (DT-SDM2) is presented. The DT-SDM2 buck converter and a compared PWM controller are designed and fabricated on a standard TSMC 0.35 ??m 3.3 V CMOS process. The operating frequency of the proposed DT-SDM2 ranges from 400 KHz to 1.2 MHz. Simulation results show that DT-SDM2...
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