公开(公告)号：US10241948B2

公开(公告)日：2019-03-26

申请号：US15980559

申请日：2018-05-15

Applicant: FINISAR CORPORATION

Inventor： Hongdang He ,  Qin Chen

IPC: G01R19/22 ,  G06F13/38

Abstract: An example embodiment includes an idle state detection circuit. The idle state detection circuit includes a bias current loop, a rectifying circuit loop, a voltage translating loop, and a filter circuit. The bias current loop provides a rectifying diode a forward current such that the rectifying diode detects an alternating current (AC) signal received from a transmitter via one or more transmission nodes. The rectifying circuit loop stores differential peak to peak amplitude information representative of a peak to peak amplitude of the AC signal in a first capacitor that is electrically coupled to a cathode side of the rectifying diode. The voltage translating loop converts the differential peak to peak amplitude information stored at the first capacitor to a single-end voltage signal across a first resistor that is electrically coupled to the cathode side of the rectifying diode. The filter circuit filters an AC component of the single-end voltage signal.

公开(公告)号：US09838116B2

公开(公告)日：2017-12-05

申请号：US14991348

申请日：2016-01-08

Applicant: Finisar Corporation

Inventor： Hongdang He ,  Qin Chen

IPC: H04B10/079 ,  H04B10/80 ,  G06F13/42 ,  G06F13/40

CPC classification number: H04B10/07955 ,  G06F13/4086 ,  G06F13/4282 ,  G06F2213/0026 ,  H04B10/801

Abstract: A peripheral component interconnect-express (PCIe) link with presence of an active optical cable (AOC) that couples between an electrical PCIe (E-PCIe) transmitter and an E-PCIe receiver may include the AOC. The AOC may include an electrical-to-optical PCIe (EO-PCIe) transceiver coupled to the E-PCIe transmitter. The EO-PCIe transceiver may include a laser diode driver that includes a common mode voltage output terminal. The EO-PCIe transceiver may include a detection condition circuit that includes a decoupling capacitor. The decoupling capacitor may be referenced to a ground level and may connect to the common mode voltage output terminal of the laser diode driver. The detection condition circuit may create a receiver detection condition for a receiver detection circuit of the E-PCIe transmitter to detect presence of the AOC.

公开(公告)号：US20180260350A1

公开(公告)日：2018-09-13

申请号：US15980559

申请日：2018-05-15

Applicant: FINISAR CORPORATION

Inventor： Hongdang He ,  Qin Chen

IPC: G06F13/38

CPC classification number: G06F13/38 ,  G06F13/385 ,  G06F2213/0026

Abstract: An example embodiment includes an idle state detection circuit. The idle state detection circuit includes a bias current loop, a rectifying circuit loop, a voltage translating loop, and a filter circuit. The bias current loop provides a rectifying diode a forward current such that the rectifying diode detects an alternating current (AC) signal received from a transmitter via one or more transmission nodes. The rectifying circuit loop stores differential peak to peak amplitude information representative of a peak to peak amplitude of the AC signal in a first capacitor that is electrically coupled to a cathode side of the rectifying diode. The voltage translating loop converts the differential peak to peak amplitude information stored at the first capacitor to a single-end voltage signal across a first resistor that is electrically coupled to the cathode side of the rectifying diode. The filter circuit filters an AC component of the single-end voltage signal.

公开(公告)号：US09971718B2

公开(公告)日：2018-05-15

申请号：US14834722

申请日：2015-08-25

Applicant: FINISAR CORPORATION

Inventor： Hongdang He ,  Qin Chen

IPC: G01R19/22 ,  G06F13/38

CPC classification number: G06F13/38 ,  G06F13/385 ,  G06F2213/0026

Abstract: An example embodiment includes an idle state detection circuit. The idle state detection circuit includes a bias current loop, a rectifying circuit loop, a voltage translating loop, and a filter circuit. The bias current loop provides a rectifying diode a forward current such that the rectifying diode detects an alternating current (AC) signal received from a transmitter via one or more transmission nodes. The rectifying circuit loop stores differential peak to peak amplitude information representative of a peak to peak amplitude of the AC signal in a first capacitor that is electrically coupled to a cathode side of the rectifying diode. The voltage translating loop converts the differential peak to peak amplitude information stored at the first capacitor to a single-end voltage signal across a first resistor that is electrically coupled to the cathode side of the rectifying diode. The filter circuit filters an AC component of the single-end voltage signal.

公开(公告)号：US20170026115A1

公开(公告)日：2017-01-26

申请号：US14991348

申请日：2016-01-08

Applicant: Finisar Corporation

Inventor： Hongdang He ,  Qin Chen

IPC: H04B10/079 ,  G06F13/42 ,  G06F13/40 ,  H04B10/80

CPC classification number: H04B10/07955 ,  G06F13/4086 ,  G06F13/4282 ,  G06F2213/0026 ,  H04B10/801

Abstract: A peripheral component interconnect-express (PCIe) link with presence of an active optical cable (AOC) that couples between an electrical PCIe (E-PCIe) transmitter and an E-PCIe receiver may include the AOC. The AOC may include an electrical-to-optical PCIe (EO-PCIe) transceiver coupled to the E-PCIe transmitter. The EO-PCIe transceiver may include a laser diode driver that includes a common mode voltage output terminal. The EO-PCIe transceiver may include a detection condition circuit that includes a decoupling capacitor. The decoupling capacitor may be referenced to a ground level and may connect to the common mode voltage output terminal of the laser diode driver. The detection condition circuit may create a receiver detection condition for a receiver detection circuit of the E-PCIe transmitter to detect presence of the AOC.

Abstract translation: 具有耦合在电PCIe（E-PCIe）发射机和E-PCIe接收机之间的有源光缆（AOC）的外围组件互连快速（PCIe）链路可以包括AOC。 AOC可以包括耦合到E-PCIe发射机的电 - 光PCIe（EO-PCIe）收发器。 EO-PCIe收发器可以包括包括共模电压输出端的激光二极管驱动器。 EO-PCIe收发器可以包括包括去耦电容器的检测条件电路。 去耦电容器可以参考地电平并且可以连接到激光二极管驱动器的共模电压输出端。 检测条件电路可以产生用于E-PCIe发射机的接收机检测电路的接收机检测条件，以检测AOC的存在。

公开(公告)号：US20170005587A1

公开(公告)日：2017-01-05

申请号：US14834722

申请日：2015-08-25

Applicant: FINISAR CORPORATION

Inventor： Hongdang He ,  Qin Chen

IPC: H02M7/06

CPC classification number: G06F13/38 ,  G06F13/385 ,  G06F2213/0026

Abstract: An example embodiment includes an idle state detection circuit. The idle state detection circuit includes a bias current loop, a rectifying circuit loop, a voltage translating loop, and a filter circuit. The bias current loop provides a rectifying diode a forward current such that the rectifying diode detects an alternating current (AC) signal received from a transmitter via one or more transmission nodes. The rectifying circuit loop stores differential peak to peak amplitude information representative of a peak to peak amplitude of the AC signal in a first capacitor that is electrically coupled to a cathode side of the rectifying diode. The voltage translating loop converts the differential peak to peak amplitude information stored at the first capacitor to a single-end voltage signal across a first resistor that is electrically coupled to the cathode side of the rectifying diode. The filter circuit filters an AC component of the single-end voltage signal.

Abstract translation: 一个示例实施例包括空闲状态检测电路。 空闲状态检测电路包括偏置电流回路，整流电路回路，电压转换回路和滤波电路。 偏置电流回路为整流二极管提供正向电流，使得整流二极管经由一个或多个传输节点检测从发送器接收的交流（AC）信号。 整流电路回路存储表示在电耦合到整流二极管的阴极侧的第一电容器中的交流信号的峰峰值振幅信号的峰值峰值信号。 电压转换环路将差分峰值与存储在第一电容器处的峰值振幅信息转换成电耦合到整流二极管的阴极侧的第一电阻器的单端电压信号。 滤波电路对单端电压信号的交流分量进行滤波。