Sense amplifier and method for small bit line swing with short propagation delay for high speed MOS memories
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United States of America Patent
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-
Oct 19, 1982
Grant Date -
N/A
app pub date -
Feb 11, 1980
filing date -
Feb 11, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit for producing a signal of one type in the absence of a semiconductor at an addressed memory location and a signal of another type in the presence of the semiconductor includes a constant voltage reference source to supply a variable current to a pull up FET. The pull up FET is connected to be in series with the memory semiconductor when it is present in the circuit, and operates to supply a low level voltage to an output amplifier when the semiconductor is present and a high level voltage when the semiconductor is not present. The low level voltage is centered about the trigger point of the amplifier, so that the bit line swing from the memory semiconductor produces a full MOS output from the amplifier.
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