CALCULATION TYPE CONTINUOUS FREQUENCY VARIABLE OSCILLATION CIRCUIT

PROBLEM TO BE SOLVED: To provide a variable frequency oscillation circuit which continuously and smoothly changes frequencies over a wide range and easily adjusting a delay time. SOLUTION: This variable frequency oscillation circuit is provided with a clock oscillation circuit 1 for generating a pulse signal by a clock of a fixed period, a clock distribution circuit 2, a plurality of AND circuits 4 and 5 for outputting only a particular pulse to delay circuits 6 and 7 according to a control signal from a main control circuit 3, the plurality of delay circuits 6 and 7 for delaying an inputted pulse signal only by a delay time D(n) set by the main control circuit 3 and outputting the inputted pulse signal to an OR circuit 8, the OR circuit 8 for outputting the inputted pulse signal as an OR operation, and the main control circuit 3 having a memory for calculation for storing control information calculated from the pulse signal inputted from the clock oscillation circuit 1 and preset frequency information. COPYRIGHT: (C)2005,JPO&NCIPI