|InterJournal Complex Systems, 40
|Manuscript Number: |
Submission Date: 963011
|Comparing the bit-energy of continuous and discrete signal representations|
Category: Brief Article
A canonical model of a communication channel is employed to quantify the performance of physical computational systems. Using information theory we investigate the efficiency as measured in bit-energy (joules/bit) of continuous/discrete-value and continuous/discrete-time circuits. We employ physical models of noise and power dissipation in the circuit elements in order to derive the signal-to-noise ratio, average power consumption, and channel capacity given a constraint on the maximum range of the processed signals. Results of this comparison indicate that analog systems outperform digital systems only at very low signal-to-noise ratios.
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