| 摘要 |
<p>In a printing wire driving apparatus wherein a plurality of printing wires mounted on a carriage of a printer are driven in accordance with printing data, there are provided with a voltage regulator (10) including a transistor chopper (10a) for periodically chopping input voltage, and a smoothing circuit (10b) for smoothing the output voltage of the transistor chopper, a plurality of printing wire driving circuits connected in parallel across output lines of the smoothing circuit (106), each of the printing wire driving circuits including a printing wire operating coil (18), a driving circuit (19) connected in series with the operating coil and a transistor (10) which are connected in series across the output lines. There is also provided a system controller (30) for controlling the operation of the transistor chopper (10a), and for controlling a printing signal generator (31) which generates electric signals adapted to control the printing wire driving circuits.</p> |
