Invention Grant
- Patent Title: Electronic device, fiber-optic communication system comprising the electronic device and method of operating the electronic device
- Patent Title (中): 电子设备,包括电子设备的光纤通信系统和操作电子设备的方法
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Application No.: US13656434Application Date: 2012-10-19
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Publication No.: US08841972B2Publication Date: 2014-09-23
- Inventor: Gerd Schuppener
- Applicant: Texas Instruments Deutschland GmbH
- Applicant Address: DE Freising
- Assignee: Texas Instruments Deutschland GmbH
- Current Assignee: Texas Instruments Deutschland GmbH
- Current Assignee Address: DE Freising
- Agent Alan A. R. Cooper; Frederick J. Telecky, Jr.
- Main IPC: H03F3/08
- IPC: H03F3/08

Abstract:
An electronic device, a fiber-optic communication system comprising the electronic device and a method of operating the electronic device are provided. The electronic device comprises a transimpedance-type amplifier having a transimpedance stage comprising an amplifier which is coupled in series with an input node. A feedback resistor is coupled in series between an output node of the amplifier and an inverting input node of the amplifier to provide a virtual ground node which is coupled to the input node, the inverting input node of the amplifier and to the feedback resistor. A current source is coupled to the virtual ground node so as to compensate for an offset current in an input signal which is coupled to the input node of the electronic device. Further, the electronic device comprises a control stage which is configured to control the current source as a function of a current through the feedback transistor.
Public/Granted literature
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