US 12,470,303 B2
Receiver optical sub-assembly, bi-directional optical sub-assembly, optical module, and optical network device
Rixiang Cao, Dongguan (CN); Yu Xiong, Shenzhen (CN); Zelin Wang, Dongguan (CN); and Zhe Yu, Dongguan (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Oct. 20, 2023, as Appl. No. 18/491,572.
Application 18/491,572 is a continuation of application No. 17/557,450, filed on Dec. 21, 2021, granted, now 11,848,710.
Application 17/557,450 is a continuation of application No. PCT/CN2020/097010, filed on Jun. 19, 2020.
Claims priority of application No. 201910544063.6 (CN), filed on Jun. 21, 2019.
Prior Publication US 2024/0121008 A1, Apr. 11, 2024
Int. Cl. H04B 10/67 (2013.01); H03F 3/08 (2006.01); H04B 10/40 (2013.01); H04B 10/69 (2013.01)
CPC H04B 10/67 (2013.01) [H03F 3/08 (2013.01); H04B 10/40 (2013.01); H04B 10/691 (2013.01); H04B 10/697 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A receiver optical sub-assembly, comprising a photodiode, a trans-impedance amplifier, a first filter component, and a second filter component, wherein:
the photodiode is configured to convert an optical signal into an electrical signal, a positive electrode of the photodiode is connected to an input terminal of the trans-impedance amplifier, and a negative electrode of the photodiode is connected to a first power supply;
the trans-impedance amplifier is configured to amplify the electrical signal output by the photodiode, a power terminal of the trans-impedance amplifier is connected to a second power supply, and a first ground terminal of the trans-impedance amplifier is connected to an external ground;
a second ground terminal of the trans-impedance amplifier is connected to the external ground by using the first filter component; and
a first terminal of the second filter component is connected to the negative electrode of the photodiode, and a second terminal of the second filter component is connected to the first terminal of the first filter component.