Shuang SONG,Jiawei XU,Roland Van WEGBERG,Nick Van HELLEPUTTE
申请号：
US16709908
公开号：
US20200187788A1
申请日:
2019.12.10
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A device for read-out of a photoplethysmography (PPG) signal comprises: a photodiode, which is configured to detect a PPG signal, the photodiode comprising a first and a second terminal； and a read-out circuitry for reading out the PPG signal, wherein an input stage is connected to receive a first and a second input signal from the terminals and a DC bias voltage, and wherein the input stage is configured for current sensing to provide a fully differential amplification of the input signals to a first and a second current signal, and wherein an output stage is configured to receive the current signals, wherein the current signals comprise an AC and a DC component of the PPG signal, and wherein the output stage is configured to generate a differential output voltage through a gain component.
