| 摘要 |
The invention concerns a voltage regulating circuit (1) capable of detecting "latch-up" disturbing the voltage to be regulated, eliminating said phenomenon and restoring the voltage at a predetermined level. Said circuit comprises a bipolar transistor (2), a resistor (5) and means supplying substantially constant voltage (6). Said circuit (1) also comprises voltage detecting means (11) arranged to receive the regulated voltage (Vreg), and supply a control voltage to said transistor (2) capable of controlling its being switched between a conductive state and a locked state, such that the transistor (2) is in locked state when a "latch-up" occurs causing the regulated voltage to fall below a first voltage level, and such that the transistor (2) is in conductive state, when said regulated voltage is lower than a second voltage level, below which the "latch-up" phenomenon is eliminated.
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