| 摘要 |
A coil load driving circuit in which generation of radiation noise when a motor is stationary is minimized, includes output buffers that output a PWM pulse to both terminals of a motor; a transfer voltage generating circuit that outputs transfer voltages V<SUB>TR1</SUB>, V<SUB>TR2 </SUB>proportional to the difference between an input control voltage V<SUB>IN </SUB>and input reference voltage V<SUB>REF</SUB>; PWM comparators that output PWM signals PW 1 , PW 2 corresponding to the transfer voltages V<SUB>TR1</SUB>, V<SUB>TR2</SUB>; and an output PWM pulse synthesis circuit that controls the output buffer in accordance with an AND signal of the PWM signal PW 1 and an exclusive OR signal EX of the PWM signals PW 1 and PW 2 , and controls the output buffer in accordance with an AND signal of the PWM signal PW 2 and the exclusive OR signal EX.
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