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专利名称：Protection circuit for a CMOS integrated
circuit
发明人：Ta-Lee Yu申请号：US08/685035申请日：19960723公开号：US05742465A公开日：19980421
摘要：A protection circuit for a CMOS integrated circuit which is biased with a firstvoltage and a second voltage includes a voltage divider, a voltage comparator, and aswitch. The full level of the first voltage is higher than that of the second voltage. Thevoltage divider divides the first voltage which is to be compared with the second voltagein the voltage comparator. The switch is controlled by the voltage comparator. Theswitch isolates the CMOS integrated circuit from the second voltage when the firstvoltage is lower than the second voltage. Therefore, no forward bias current path existsin the CMOS integrated circuit even though the voltage levels of the first and secondvoltages reach their full levels at different times.
申请人：WINBOND ELECTRONICS CORPORATION
代理机构：Fish & Richardson P
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