| 摘要 |
PURPOSE:To suppress generation of distorsions due to triangular waves, by performing electric current supply and absorption to a load by a logical output compared with a triangular wave having a phase which is different from that of the positive signal of input signals by 180 deg. and another logical output compared with another triangular wave having a phase which is different from that of the negative signal of the input signals by 180 deg.. CONSTITUTION:The positive signal of input signals supplied to an input terminal 31 is compared with the 1st and 2nd output triangular waves, whose phases are different from another by 180 deg., of a triangular wave generating circuit 78 at comparators 41 and 42 and an NOR circuit 45 generates its output only when the level of input signals is higher than both output triangular waves. On the other hand, the negative signal of the input signals is compared with the 3rd and 4th output triangular waves, whose phases are different from each other by 180 deg., of the circuit 78 at comparators 43 and 44 and another NOR circuit 46 generates its output only when the level of input signals is lower than both output triangular waves. The output of the circuit 45 makes an FET51 conductive and supplies an electric current to a load 61 and the output of the circuit 46 makes another FET52 conductive and absorbs the electric current from the load 61. Therefore, the non-linearity in the vicinity of the positive and negative apexes of the triangular waves can suppress generation of distorsions given to the signals.
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