| 摘要 |
A drive circuit for an output device, such as a printer or the like, has a processing unit (4) for generating control signals for controlling the output device, and driving means (6) operable by the control signals for driving the output device. The drive circuit also has a power supply (1), and voltage detecting means (3) for detecting a drop in the voltage supplied by the power supply below a pre-determined level higher than a minimum operating voltage for the processing means. The voltage detecting means are arranged to co-operate with the driving means so as to inhibit operation of the output device when the power supply voltage drops below the pre-determined level.
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