Analog DNA computing devices toward the control of molecular robots

This paper introduces a variety of analog computing elements utilizing dynamics of DNA strand displacement reactions. In the proposed method, the establishment of functional relationship between the concentrations of inputs and those of outputs at the steady state is regarded as computation. We will propose analog versions of an amplifier, an adder, a multiplier, a divider and a constant gate, which are time responsive. Some further discussion will be made toward the construction of controllers for molecular robots.