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Bipolar Memory

Posted on 1998-02-05
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Are RAM chips large bipolar memory arrays?  In particular DRAM chips.
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Question by:amj120397
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jhance earned 200 total points
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No, DRAMS are exclusively CMOS these days.  Bipolar memories are still made but only for very specialized applications.  They are relatively small in capacity as it is not possible to construct bipolar transistors anywhere near as small as CMOS transistors.  They are also incredibly power hungry.  Why are they used?  They are extremely fast.  You can buy bipolar RAMs with access times of less then 1nS.  The fastest DRAMS are around 40-50nS.
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