Pulse width modulation generated by a sigma delta loop
AssigneeInfineon Technologies AG
InventorDirk HAMMERSCHMIDT
Life of this patent
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Abstract
A sigma delta (SD) pulse-width modulation (PWM) loop includes a loop filter implementing a linear transfer function to generate a loop filter signal, wherein the loop filter is configured to receive an input signal and a first feedback signal and generate the loop filter signal based on the input signal, the first feedback signal, and the linear transfer function; and a hysteresis comparator coupled to an output of the loop filter, the hysteresis comparator configured to receive the loop filter signal and generate a sigma delta PWM signal based on the loop filter signal, wherein the first feedback signal is derived from the sigma delta PWM signal.
Claims18
A sigma delta (SD) pulse-width modulation (PWM) loop, comprising:
- a loop filter implementing a linear transfer function to generate a loop filter signal, wherein the loop filter is configured to receive an input signal and a first feedback signal and generate the loop filter signal based on the input signal, the first feedback signal, and the linear transfer function;
- and
- a hysteresis comparator coupled to an output of the loop filter, the hysteresis comparator configured to receive the loop filter signal and generate a sigma delta PWM signal based on the loop filter signal,
- wherein the first feedback signal is derived from the sigma delta PWM signal.
Dependencies are inferred from the claim text.