Silergy Semiconductor Technology (hangzhou) Ltd

Huisen He

Lili Shao

Baoyu Zhang

Yanni Zhang

Xianguo Huang

Zheng Lv

A method of manufacturing an optoelectronic integrated device can include: providing a semiconductor substrate including at least one optoelectronic device in the semiconductor substrate; forming a first dielectric layer on a first surface of the semiconductor substrate; forming a multilayer insulating layer on the first dielectric layer; forming a first opening in the multilayer insulating layer to expose the first dielectric layer above the optoelectronic device area; and forming a second dielectric layer on the dielectric layer, where the first dielectric layer and the second dielectric layer are anti-reflection layers.

Photoelectric integrated device and manufacturing method thereof

An ambient light filter configured to filter ambient light noises from an optical current that is at least partially caused by an optical pulse sequence emitted by a light emitting device, can include: a sample and detection circuit configured to sample the optical current and to obtain a current component in a first mode, and to remove the current component from the optical current and to generate a detection signal in a second mode; a current amplifier configured to receive the detection signal, and to generate an amplified current signal; and a control circuit configured to switch the sample and detection circuit between the first and second modes, where the control circuit switches the sample and detection circuit to the first mode in at least one optical pulse gap, and switches the sample and detection circuit to the second mode when a next optical pulse arrives.

Ambient light filter and associated photo sensor having a first detection mode in at least one optical pulse gap

A photoelectric sensor can include: a lighting element configured to generate a first optical signal, where a second optical signal is generated by reflection of the first optical signal when emitting an object; a driving circuit configured to drive the lighting element; a photoelectric conversion circuit configured to generate a first optical current in accordance with the second optical signal; and a programmable current amplifier circuit configured to sample and hold the first optical current when the lighting element is in operation, and to generate a second optical current when the lighting element is out of operation in one detection period, where the second optical current lasts for at least one working period in the detection period, and where the second optical current represents the first optical current.

Photoelectric sensor, photoelectric measurement method and heart rate measurement equipment

A photo detector can include: a light emitting device configured to emit light; a driving circuit configured to drive the light emitting device; a photo-electric conversion circuit configured to generate an optical current signal according to an optical signal; an isolation circuit configured to transmit the optical current signal in an isolated manner; an ambient light filter configured to filter a current component of the optical current signal corresponding to an ambient light, and to generate a clean optical current signal; a current amplification circuit configured to amplify the clean optical current signal, and to generate an amplified optical current signal; (vii) an analog-to-digital converter configured to convert the amplified optical current signal to a digital signal; and a control circuit configured to output an optical detection signal according to the digital signal.

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Hangzhou, China

Huisen He