Serial to parallel conversion of pulse-rate signals using binary rate multiplier principle

A novel representation of process variables as frequency signals is presented in this paper. Traditional analog computers and transfer function analyzers built using the binary rate multiplier principle did not explicitly consider negative numbers. It is proposed to introduce a two-pin system in which the sign of the variable is made available as 1-bit data on one pin and a series of pulses, whose frequency is proportional to the magnitude of the variable on another pin. Using this concept, the binary rate multiplier had been redesigned to accept signals of both the polarities. Integrators can be constructed, feedback of a variable can be realized and summing operation could be performed easily using this new representation.