Transimpedance amplifier chip and light receiving module

A transimpedance amplifier and optical receiving technology, which is applied in the field of optical communication, can solve the problems of reducing the sensitivity performance of optical receivers, and achieve the effects of eliminating the space limitation of packaging and wiring, improving sensitivity, and simplifying packaging and wiring schemes
CN111404494BActive Publication Date: 2020-09-15MICROTERA SEMICON (GUANGZHOU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MICROTERA SEMICON (GUANGZHOU) CO LTD
Publication Date
2020-09-15

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Abstract

The invention provides a transimpedance amplifier chip and a light receiving module, comprising: a photodetector packaged in the same package body, a filter capacitor and a transimpedance amplifier chip; the transimpedance amplifier chip includes a built-in filter resistance area isolated by a deep groove And the transimpedance amplifier device area, filter resistors are formed in the built-in filter resistor area, the two ends of the filter resistors are led to the corresponding pads through the metal layer wires, the built-in filter resistors and the metal layers in the built-in filter resistor area are not connected to the substrate ; Devices constituting the transimpedance amplifier are formed in the region of the transimpedance amplifier device. The invention increases the filter circuit formed by the filter capacitor and the filter resistor to reduce the influence of the external Wi-Fi signal on the optical receiver, and improves the sensitivity of the optical receiver; overcomes technical difficulties and sets the filter resistor in the transimpedance amplifier chip, saving chips The use cost of external resistors eliminates the limitation of packaging and wiring space, and at the same time simplifies the packaging and wiring scheme, which is of great practical value.
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Description

technical field

[0001] The invention relates to the technical field of optical communication, in particular to a transimpedance amplifier chip and an optical receiving module. Background technique

[0002] Optical communication technology is a communication method that uses light waves as the transmission medium. Both light waves and radio waves are electromagnetic waves, but the frequency of light waves is higher than that of radio waves, and the wavelength is shorter than that of radio waves. Therefore, it has the advantages of wide transmission frequency, large communication capacity and strong anti-electromagnetic interference ability.

[0003] Optical communication mainly includes optical transmitter, optical fiber and optical receiver. Among them, the role of the optical transmitter is to convert the HDB3 signal code sent from the multiplexing equipment into NRZ code; then encode the NRZ code into a code pattern suitable for transmission on the optical cable line; T...

Claims

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