Patent ID: 8395429
Filing Date: 2013-03-12
Classification: G06F,H03L

Abstract:
1. A signal generating device outputting a pulse signal based on a timing when an integrated waveform in a sawtooth shape crosses over a previously set threshold value, said device comprising: a clock source outputting a clock signal; an integrated waveform generation unit receiving an inputted digital signal having a digital value according to a set frequency and integrating the digital value based on the clock signal to generate the integrated waveform in a sawtooth shape; a clock information output unit outputting a head clock signal and a rear clock signal reading a head digital value and a last digital value in a string of odd digital values at regular intervals including digital values before and after the previously set threshold value in a region where the digital value outputted from said integrated waveform generation unit changes in one direction; a circuit unit outputting a coefficient value corresponding to a ratio between the difference value among the head digital value and the threshold value and the difference value among the last digital value and the threshold value; a use ratio determination unit outputting a signal corresponding to a use ratio between the head clock signal and the rear clock signal regarded as a time point when the digital value of the integrated waveform is the threshold value for only a predetermined time, based on the coefficient value; a clock selection unit selecting and outputting one side of the head clock signal and the rear clock signal outputted from said clock information output unit, for only a predetermined time, by the signal corresponding to the use ratio outputted from said use ratio determination unit; and a signal output unit outputting a pulse signal obtained by being toggled by each clock signal outputted from said clock selection unit.