Optical receivers are widely used in Laser pointer, Time of Flight (TOF), and many other applications....

 

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Optical receivers are widely used in Laser pointer, Time of Flight (TOF), and many other applications. Since detected light in sensor induces small current change, we need to change current signal to voltage signal, and make large enough swing that can be recognized in next stage (1, 0 digital value normally). To make voltage swing large, we need amplifier. Suppose that light information is captured every 10 ns, then amplifier should have almost flat gain up to 100 MHz. Fortunately, amplifier can support with 20% margin in real condition, and 50% margin in ideal condition (assume there is no noise). In other world, we only need 80MHz, and 50 MHz for real, and ideal condition, with enough gain. Optical receivers are widely used in Laser pointer, Time of Flight (TOF), and many other applications. Since detected light in sensor induces small current change, we need to change current signal to voltage signal, and make large enough swing that can be recognized in next stage (1, 0 digital value normally). To make voltage swing large, we need amplifier. Suppose that light information is captured every 10 ns, then amplifier should have almost flat gain up to 100 MHz. Fortunately, amplifier can support with 20% margin in real condition, and 50% margin in ideal condition (assume there is no noise). In other world, we only need 80MHz, and 50 MHz for real, and ideal condition, with enough gain.

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Solution To meet the requirements stated an amplif... View the full answer