Patent ID: 11969264
Assignee: AMENGINE CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. 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.