CIRCUIT AND DEVICE FOR GENERATING PN CODE

PROBLEM TO BE SOLVED: To provide a PN code generating device capable of speedily generating a PN code. SOLUTION: Four kinds of PN code generating circuits 11 to 14 are connected in parallel with respect to a clock control circuit CC and a data selector DS and are respectively provided with a reset switch RS and a code switch terminal CT in addition. A clock signal CLK and a number of stages switch signal CT are inputted to the clock control part CC. A code switch signal NT1 from the part CC for switching an output signal from the respective parts 11 to 14 is inputted to the data selector DS.