Patent ID: 7758015

Claim:
A solenoid-operated valve controller for controlling a double-solenoid-operated valve having a plurality of solenoid coils disposed on respective ends of a valve spool, comprising: a switch comprising a transistor having a drain terminal, a source terminal, and a gate terminal; a plurality of signal lines wired in association with the solenoid coils, respectively; said signal lines being connected to respective ends of said solenoid coils; said solenoid coils having other ends, which are electrically connected in common to said drain terminal of said transistor; and a control circuit for selecting at least one of said solenoid coils and also permitting simultaneous selection of said solenoid coils, which corresponds to signal states of a plurality of input signals that are supplied respectively to said signal lines, and turning on and off said switch in order to control said selected one of the solenoid coils, wherein said switch is turned off during a period in which said solenoid coils are simultaneously selected by said control circuit.