Patent ID: 8174302

Claim:
A pulse signal generator, comprising: a period setting unit that receives a period set signal including an information indicative of a pulse period, and that outputs a period control signal controlling the pulse period; a duty ratio setting unit that receives a duty ratio set signal including an information indicative of a duty ratio of a pulse, that receives a signal including the pulse period set in the period setting unit, and that generates a duty ratio control signal controlling the duty ratio of the pulse on a basis of the pulse period and the duty ratio set signal; and a pulse generation unit that comprises a comparator, wherein the comparator compares a signal indicative of a voltage level value changed in response to the period control signal with the duty ratio control signal to generate a comparison result signal, wherein the pulse generation unit generates a pulse signal including the pulse period and the duty ratio of the pulse on a basis of the comparison result signal, and wherein the duty ratio setting unit generates a potential corresponding to the signal including the pulse period set in the period setting unit, and divides the potential on a basis of the duty ratio set signal to generate the duty ratio control signal.