| 摘要 |
A dc voltage converter or dc-RF modulation converter includes an inverting {dot over (Cuk converter circuit operating under hysteretic feedback control. In an exemplary embodiment, the converter further includes a damping circuit to ensure stability over the extended control frequency bandwidth afforded by the hysteretic control. The converter may further include a non pulse-skipping pulse width control circuit, such that the hysteretic controller's switching signal is limited to maximum and minimum pulse widths, which avoids potential saturation issues where transformer isolation is used for switching the {dot over (Cuk circuit. In an exemplary application, the converter is used as part of a supply modulation amplifier circuit within a wireless base station, which application capitalizes on the extended bandwidth gained through hysteretic control and reduced circuit complexity by generating signal amplification power directly from the -48 VDC supply rail in the base station.
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