Write driver circuit

A semiconductor integrated circuit device comprising:

• a plurality of write driver circuits driving a magnetic head for writing data to a plurality of magnetic disks, respectively, and
• a mode switching circuit for setting a write mode for simultaneously placing the plurality of write driver circuits in operating condition, wherein
• each of the plurality of write driver circuits includes:
• first and second pnp type transistors whose bases are each supplied with a pair of complementary input signals,
• first and second npn type transistors whose bases are connected to respective collectors of the first and second pnp type transistors,
• first resistor elements each connected between the emitters of the first and second pnp type transistors and the collectors of the first and second npn type transistors,
• second resistor elements each connected between the commonly connected collectors of the first and second npn type transistors and an external power supply terminal supplied with a first supply voltage,
• third and fourth npn type transistors each connected to the first and second npn type transistors in series and subjected to complementary switching control by means of inverted signals of the corresponding input signals, and
• an inductive head connected between a first output terminal provided at the connection between the first and third npn type transistors and a second output terminal provided at the connection between the second and fourth npn type transistors.