Switched-mode power supply bias current modulation

The patent applies periodic action by varying the bias current in a periodic manner synchronized with the PWM switching cycle. The bias current is adjusted at specific intervals during the switching period, creating a periodic modulation pattern that distributes switching noise across different time points rather than concentrating it at regular intervals, thereby improving EMI characteristics while maintaining power conversion functionality

The patent implements dynamics by making the bias current variable rather than fixed. The bias current is dynamically adjusted based on the switching state and timing, allowing the system to adapt the bias current magnitude and timing to optimize EMI performance while maintaining proper power switch operation throughout different switching cycles

The patent applies segmentation by dividing the bias current into multiple discrete levels or stages that can be selectively activated. The bias current adjustment circuit is segmented into separate control paths that can independently modify different aspects of the bias current (magnitude, timing, duration), allowing for nuanced EMI control without requiring a completely complex redesign of the entire current supply system

The patent implements parameter changes by modifying key parameters of the bias current including its magnitude, timing relative to the PWM cycle, and duration. These parameter variations are controlled through the bias current adjustment circuit which changes the electrical characteristics of the bias current to achieve noise reduction while maintaining circuit functionality