PULSE WIDTH ADJUSTMENT DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a pulse width adjustment device capable of precisely adjusting the pulse width of a clock without being affected by a change in temperature or voltage or the delay quantity of a circuit element.

SOLUTION: This device comprises a delay circuit outputting a plurality of delay pulses having a predetermined delay quantity with a clock CLK of a fixed period as input; a plurality of delay state holding circuits outputting holding signals for measuring the delay quantity per period of the clock CLK by use of the plurality of delay pulses; a holding timing circuit generating a pulse showing the timing of outputting the holding signals and giving it to the delay state holding circuits; a plurality of encoders connected to each delay state holding circuit and counting the number of holding signals measured for one period by use of the holding signals given from the connected delay state holding circuit; and an arithmetic value output circuit performing a predetermined operation to the count value of holding signals outputted from each encoder and outputting an arithmetic value corresponding to the delay quantity per period of the clock CLK.

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