Abstract
Spool type valve, which is the selector valve with three ports connection and two position, is considered one of fluid logic elements. This fluid logic element is a “conditioned disjunction” logic element for which the Boolean expression is X=(A∧C)∨(B∧C)=(ABC). The “conditioned disjunction” is one of universal decision elements. The main objective of this paper is to present a technique which can be used to synthesize directly a n-variable logic function by the fluid logic element. When a n-variable logic function is given in the truth table, the paper describes how to obtain an expression including “conditioned disjunction” logic operations only. The paper also discusses how to derived by the technique simplified circuits of such basic memory elements as flip-flop and registers.
