本发明是有关脉冲马达的驱动电路。以往这种电路的例子示于图1,即在限制停止或低速运转时驱动线圈中电流的同时,为防止高速运转时电流以至力矩的下降,预先设置了高电压直流电源(1),并将限制电流(4)接入通电回路。为此,电抗中热损耗大,这就成为驱动电路小型化的障碍。另外, The present invention relates to a drive circuit for a pulse motor. An example of a conventional circuit of this type is shown in FIG. 1, which is a circuit that drives current in a coil while stopping or operating at a low speed, and a high-voltage DC power supply (1) is provided in advance so as to prevent the current and the torque from decreasing at high speed Limit the current (4) into the energized circuit. For this reason, the heat loss in the reactors is large, which becomes an obstacle to miniaturization of the drive circuit. In addition,