We calculate the switching time as a function of optical energy for a
single-stage smart pixel receiver. We find that operating the receiver
s dynamically using modelocked pulses is the most energy-efficient met
hod of operation. We also show that the receivers no longer operate wi
th constant optical input energy, like the symmetric self electro-opti
c effect device (S-SEED), but rather the product of the required optic
al energy and the switching time is constant, as a result of the intro
duction of electrical voltage gain.