公开(公告)号：US20150066438A1

公开(公告)日：2015-03-05

申请号：US14473635

申请日：2014-08-29

Applicant: BROADCOM CORPORATION

Inventor： Todd Lee Brooks ,  Xicheng Jiang ,  Iuri Mehr ,  David Joseph Stoops ,  Vinod Jayakumar ,  Min Gyu Kim ,  Hui Zheng ,  I-Ning Ku ,  Vinay Chandrasekhar ,  Yee Ling Cheung

IPC: H03B5/04 ,  G01R19/00 ,  G01K1/00 ,  G01L7/00 ,  A61B5/021 ,  H05B33/08 ,  A61B5/01 ,  A61B5/024 ,  A61B5/08 ,  G01J1/00 ,  G01N33/00

CPC classification number: H05B33/089 ,  A61B5/01 ,  A61B5/021 ,  A61B5/024 ,  A61B5/0816 ,  A61B2562/06 ,  G01J1/44 ,  G01K1/02 ,  G01R19/0092 ,  H03K3/0231

Abstract: A sensor interface includes on-chip relaxation oscillator circuit and a PLL that operate cooperatively to generate a highly accurate clock signal on-chip using low-power components. A photodiode generates a current signal based on an optical signal that is representative of a sensor signal. An ADC that operates based on the highly accurate clock signal generates a digital signal based on the current signal generated by the photodiode, and a processor processed the digital signal to estimate sensor data within the sensor signal. Examples of characteristics that may be sensed can include environmental characteristics (e.g., temperature, humidity, barometric pressure, etc.) and/or biomedical characteristics (e.g., body temperature, heart rate, respiratory rate, blood pressure, etc.). In desired, an amplifier processes the photodiode-provided current signal before it is provided to the ADC. Also, one or more CDACs that generate feedback currents may be used to reduce noise sensitivity of the sensor interface.

Abstract translation: 传感器接口包括片上弛豫振荡器电路和PLL，其协作地工作以使用低功率元件在片上产生高精度的时钟信号。 光电二极管基于表示传感器信号的光信号产生电流信号。 基于高度精确的时钟信号操作的ADC基于由光电二极管产生的电流信号产生数字信号，并且处理器处理数字信号以估计传感器信号内的传感器数据。 可以感测的特征的实例可以包括环境特征（例如，温度，湿度，大气压力等）和/或生物医学特征（例如体温，心率，呼吸频率，血压等）。 在期望的情况下，放大器在将其提供给ADC之前处理提供的光电二极管的电流信号。 而且，可以使用产生反馈电流的一个或多个CDAC来降低传感器接口的噪声灵敏度。

公开(公告)号：US09756699B2

公开(公告)日：2017-09-05

申请号：US14473635

申请日：2014-08-29

Applicant: BROADCOM CORPORATION

Inventor： Todd Lee Brooks ,  Xicheng Jiang ,  Iuri Mehr ,  David Joseph Stoops ,  Vinod Jayakumar ,  Min Gyu Kim ,  Hui Zheng ,  I-Ning Ku ,  Vinay Chandrasekhar ,  Yee Ling Cheung

IPC: H04B15/00 ,  H05B33/08 ,  G01R19/00 ,  H03K3/0231 ,  G01K1/02 ,  A61B5/01 ,  A61B5/024 ,  A61B5/08 ,  A61B5/021 ,  G01J1/44

CPC classification number: H05B33/089 ,  A61B5/01 ,  A61B5/021 ,  A61B5/024 ,  A61B5/0816 ,  A61B2562/06 ,  G01J1/44 ,  G01K1/02 ,  G01R19/0092 ,  H03K3/0231

Abstract: A sensor interface includes on-chip relaxation oscillator circuit and a PLL that operate cooperatively to generate a highly accurate clock signal on-chip using low-power components. A photodiode generates a current signal based on an optical signal that is representative of a sensor signal. An ADC that operates based on the highly accurate clock signal generates a digital signal based on the current signal generated by the photodiode, and a processor processed the digital signal to estimate sensor data within the sensor signal. Examples of characteristics that may be sensed can include environmental characteristics (e.g., temperature, humidity, barometric pressure, etc.) and/or biomedical characteristics (e.g., body temperature, heart rate, respiratory rate, blood pressure, etc.). If desired, an amplifier processes the photodiode-provided current signal before it is provided to the ADC. Also, one or more CDACs that generate feedback currents may be used to reduce noise sensitivity of the sensor interface.