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Electronics and Communication Digital Electronics Difficulty: Medium

An optical link uses a fiber having a power loss of 1 dB/km. A typical photo detector has responsivity 0.5 A/W. If the link is 3 km long and the detector is required to produce a current of 25 µA, the required transmitted power is An amplifier has a signal input voltage V i of 0.25 V and draws 1 mA from the source. If the amplifier delivers 8 V to a load of 10 mA, the power gain is How many equations are necessary to solve a circuit with two principal nodes? MPEG coders are used for The Fourier Transform of a function x(t) is X(f). The Fourier transform of $${{dx\left( t \right)} \over {dt}}$$ will be