| 摘要 |
PURPOSE:To obtain a reference frequency for high resolution by accumulating a numeral, set by a setting circuit, by an accumulator and by driving a binary counter by an overflow pulse. CONSTITUTION:The output C1 of a counter in a counting type setting circuit 23e and the output of an oscillator 33 are applied to an adder 39 through an AND circuit 34. Evey time the output of the oscillator 33 goes up to a 1, the adder 39 applies the output C1 to an accumulator 44. An overflow pulse OVF from the accumulator is led to AND circuits 35-38. Outputs C2-C5 from counting type setting circuits 23a-23d are led to adders 40-43 through the circuits 35-38, and accumulators 45-48 accumulate the outputs C2-C5. Overflow pulses from the accumulators 45-48 are outputted as reference pulses F1-F4 through binary counters 49-52. |
