| 摘要 |
<p>A motor driving circuit includes first and second transistors (TR1, TR2) whose collectors are respectively-connected to each one end of a pair of motor coils (L1, L2) and whose emitters are grounded through a first resistor (R1), and which are alternately turned on, a switching circuit (TSC2) connected between the other ends of the pair of motor coils (L1, L2) and a power supply terminal (VC), and a comparator (CMP2) which receives a reference voltage and a voltage drop across the first resistor (R1) respectively at its first and second input terminals and controls the conduction state of the switching circuit (TSC2) in accordance with the result of comparison between two input voltages. A second resistor (R29) and a capacitor (C2) are connected in series between the output terminal and the second input terminal of the comparator (CMP2).</p> |
