MODULATION METHOD OF PULSE WIDTH MULTIPLE

摘要

PURPOSE:To increase the response speed without using a complicated multiple circuit by converting the input binary value data into the binary value data having the desired multiple value. CONSTITUTION:A shift number changing signal p2 sent from a bit shift number changing circuit 1 drives a data bit shifter 2 to change the bit shift number (n) every modulation cycle and to convert the number (n) into the binary value data obtained by multiplying the input binary value data A by 2<n> times. Here the sum total of binary value data is set equal to the (m) times of a desired conversion multiple. These conversion data are supplied successively to a pulse width modulator 4 via a temporary memory 3 to undergo the pulse width modulation in a modulation cycle. The pulse width modulated data are then averaged by an averaging circuit 5. In such a way, the response speed can be increased without using any complicated multiple circuit.