PPM SIGNAL DATA DISCRIMINATING CIRCUIT

PURPOSE:To decrease a burden on a software and to obtain a high speed of a discriminating processing by executing the discrimination of PPM signal data with a hardware. CONSTITUTION:A timer circuit 3 generates a clock signal and converts the pulse width of a PPM signal data pulse to the number of this clock signal. In the time of one pulse of PPM signal data, the number of the clock signal outputted by this timer circuit 3 is counted. A register 7 of an initial setting register group 4 stores a reference clock number to correspond to the pulse width the specified data pulse of a PPM signal, the clock number counted by the timer circuit 3 and the reference clock number in a memory circuit 7 are compared and the type of the PPM signal data pulse is discriminated by a comparator circuit 9. When the result of the comparison is coincident, this data pulse is detected as a prescribed pulse.