Design And Construction Of A High-Frequency 3.3 V Transimpedance Amplifier
by Rea Schmid, Senior Analog Applications Engineer, Texas Instruments
While a lot of information has been published about current-to-voltage (transimpedance) designs, little has been published about how to complete a transimpedance design and design engineers are left with a fuzzy understanding of this process. Additionally, transimpedance is not well discussed at the academic level. With so many partial explanations, one is left with only a brief understanding of theory and little direction in circuit implementation, making it difficult to find a comprehensive explanation of how transimpedance designs are completed.
This TechNote walks you through a practical design using a photo detector along with circuit models, guiding the design engineer through the necessary steps to construct and design this type of circuit. Finally, the article provides a key circuit to help measure the final circuit’s actual performance.
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