| 摘要 |
<p>PURPOSE:To achieve cost reduction while securing a function, by driving the first load part not exerting the effect of voltage variation on the function by the output of a power supply due to a battery or AC adapter and driving the second and third load parts required in stability by a stabilized power supply. CONSTITUTION:The first load part high in current consumption and no exerting the effect of voltage variation on a function like a pressure pump for feeding compressed air to a cuff under pressure or a solenoid valve rapidly discharging the compressed air of the cuff is driven by the output of a power supply due to a battery or AC adapter. The second load part required to be relatively stabilized like a microcomputer controlling the whole sequence and the third load part reguired to be most stabilized in direct relation to pressure accuracy receive currents through stabilized power supply circuits 25, 26. Predetermined final voltage is detected by a voltage detection part 27 to control the driving of the microcomputer.</p> |
