Patent ID: 7495428

Claim:
A pulse generator for generating pulses with a predetermined pulse width, said pulse generator comprising: a plurality of pulsers connected in series, for each of which is configured so as to adjusting the pulse width of input pulses, and so as to output pulses with a predetermined pulse width thus adjusted, respectively and which are connected in series; a plurality of signal acquisition units which are provided corresponding to said plurality of pulsers, and each of which allows said pulses output from a corresponding one of said pulsers to be acquired from the output terminal of said corresponding pulser, wherein the plurality of pulsers comprises a first-stage pulser and a final-stage pulser; a selection unit which selects one of said pulses acquired by one of said plurality of signal acquisition units; a feedback path for inputting the pulses thus selected by said selection unit to the first-stage pulser of said plurality of pulsers; and a measurement unit for measuring the pulse width of the pulses thus selected by said selection unit based upon the loop cycle time of the pulse selected by said election unit passing through said feedback path; wherein when said selection unit selects the pulse acquired by one of the plurality of pulsers, the feedback path is formed without passing through any latter-stage pulser than a stage of the selected one pulser, and said selection unit selects the pulses acquired from each of the plurality of signal acquisition units in order, from the first-stage pulser to the final-stage pulser.