Adaptive controller used in photoplethysmography sensing system
AssigneeAmengine Corporation
InventorsPaul C. P. Chao, Tse-Yi Tu, Bo-Wei Pan, Yan-Hwa Wu
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Abstract
An adaptive controller used in a photoplethysmography sensing system, comprises a plurality of hardware circuits which are configured to: receive a photoplethysmography signal (hereinafter, “PPG signal”) processed; determine whether the PPG signal processed satisfies with a requirement; output the PPG signal processed if the PPG signal processed satisfies with a requirement; and adjust a gain of an amplifier for amplifying the PPG signal and/or a driving signal of a light source if the PPG signal processed does not satisfy with a requirement.
Claims18
An adaptive controller used in a photoplethysmography (PPG) sensing system, comprising:
- a filter, configured to receive a plurality of PPG signals generated by a plurality of photo sensors, and output a plurality of filtered PPG signals, wherein each filtered PPG signal of the plurality of filtered PPG signals has a peak;
- a peak detection circuit, configured to receive the plurality of filtered PPG signals, and generate a plurality of processed PPG signals;
- and
- a plurality of error amplifiers, wherein each error amplifier of the plurality of error amplifiers is configured to compare the peak of a filtered PPG signal of the plurality of filtered PPG signals with a reference signal, and output a control signal to a gate of a corresponding switch transistor according to a comparison result, wherein the corresponding switch transistor has an end configured to be connected to a light source, and a driving signal of the light source is configured to be adjusted according to the control signal.
Dependencies are inferred from the claim text.