Mismatch-Error Shaping-Based Digital Multiphase Modulator

作者：Rodriguez Miguel^*; Miaja Pablo F; Sebastian Javier; Maksimovic Dragan

来源：IEEE Transactions on Power Electronics, 2012, 27(4): 2055-2066.

DOI：10.1109/TPEL.2011.2168612

• Digital-analog conversion
• digital control
• noise shaping
• switched-mode power supply

This paper introduces a digital multiphase modulator (MPM) using mismatch-error shaping techniques based on a digital-to-analog converter view of multiphase power converters. The proposed modulator has relatively simple implementation requiring no explicit pulsewidth modulation and generates control pulses for any number of phases using a single, low-frequency clock. Advantages and disadvantages of the mismatch-error shaping MPM are examined through analysis, simulations, and experimental results. The proposed MPM is particularly well suited for multilevel envelope-tracking amplifiers supplying power to linear RF power amplifiers. Results are shown for an experimental eight-phase buck converter in an envelope-tracking application.

• 出版日期2012-4