Applied Materials, Inc.
Narrow range sense amplifier with immunity to noise and variation

Abstract:

A memory circuit may include a memory array, and the memory array may include a plurality of data columns. The plurality of data columns may be configured to store data bits and provide data signals when selected by a read operation. The memory array may also include one or more reference columns distributed in the memory array and configured to provide a reference signal. The reference signal may track with process, voltage, and temperature variations that are specific to the memory array, and may be used to remove a common signal component and adjust the signal level to distinguish between logic 0 and logic 1 data signals.