Measurement of Loop Gain with the Digital Modulator

  title={Measurement of Loop Gain with the Digital Modulator},
  author={B. H. Cho and Fred C. Lee},
  journal={IEEE Transactions on Power Electronics},
A loop gain measurement technique for switching regulators using a digital modulator is introduced. While the conventional technique injects and measures the analog signals, the proposed digital modulator injects a digital perturbation and measures the resultant duty cycle modulation. Since the duty cycle signal, derived from all feedback loops, provides the ultimate control of a switching regulator, the loop gain defined at the duty cycle modulator is unique. Employing the digital modulator… CONTINUE READING
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