PULSE WIDTH MODULATOR

专利名称：PULSE WIDTH MODULATOR发明人：MIZUNO KIMIMOTO申请号：JP10475488申请日：19880427公开号：JPH01278287A公开日：19891108

摘要：PURPOSE:To raise the resolution of a PWM circuit and to provide a full-digitaltype pulse width modulator by setting a count value for determining the pulse width of apulse width modulation signal to a preset counter. CONSTITUTION:A time of a carrierfrequency signal with the same level to the arrival to a current deviation amount level atthe time of the rise of the frequency signal is read from a ROM 24, and set by a countedvalue to a preset type subtraction counter 26. A time from the arrival of the level of thefrequency signal at a current deviation amount level at the time of rise of the frequencysignal to the arrival to a current deviation amount level at the time of fall of the samesignal is read from the table of the ROM 24, and set to a subtraction counter 27. Thecounter 27 repeats at each time of the rise of the frequency signal to output a pulsewidth modulation signal having a predetermined width.

申请人：MITSUBISHI ELECTRIC CORP

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