Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1997-12-29
1999-07-27
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 51, G11C 706
Patent
active
059296607
ABSTRACT:
A single-ended sense amplifier pre-charges the data output line of a bank of memory cells or register file to approximately the switch point of an inverter that is part of a buffer, in preparation for the next data read cycle. The amplifier includes a stack of six transistors connected in series between a supply voltage and ground. The memory output is connected to the stack mid-point, to a latch input and to a buffer input. The most recent binary logic level read from memory passes through the latch. The latch and stack are then clocked, and the three-transistor portion of the stack turned on pulls the voltage on the stack mid-point to approximately one-half the supply voltage, which is the buffer inverter switch point. The stack is then turned off, and the stack mid-point floats at that voltage value in preparation for the next read cycle. As such, the common data line needs only slew a relatively small amount of voltage during the next read cycle. Also, the circuit of the present invention will "track" over process and temperature variations, thereby making its performance relatively consistent because the actual inverter switch point terminates the pre-charge.
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Kosakowski Richard H.
Tran Toan
United Technologies Corporation
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