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Transimpedance Considerations for High-Speed Amplifiers

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Transimpedance Considerations for High-Speed Amplifiers

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  • Author: Xavier Ramus
The purpose of a transimpedance circuit is to convert an input current from a current source (typically a photodiode) into an output voltage. The simplest method to achieve this conversion is to use a resistor connected to ground. However, the achievable gain using this method is limited by the following factors: 1. The current source input impedance; 2. The load impedance; and 3. Desired bandwidth.

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