| 摘要 |
A driver circuit for driving a load connected between an output terminal and a reference potential, includes a first transistor having a collector connected to a first supply potential and an emitter connected to the output terminal. A second transistor has a collector connected to the output terminal and an emitter connected to the reference potential. An emitter-coupled transistor pair has bases to which a symmetrical control signal is applied, one collector which is coupled through a first resistor to the first supply potential and another collector which is coupled through a second resistor with the output terminal. A controllable current source supplies the transistor pair. A control device controls the current source in proportion to a supply voltage occurring between the first supply potential and the reference potential.
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