Static information storage and retrieval – Floating gate – Particular biasing
Reexamination Certificate
2008-04-29
2008-04-29
Phan, Trong (Department: 2827)
Static information storage and retrieval
Floating gate
Particular biasing
C365S185330
Reexamination Certificate
active
11121114
ABSTRACT:
A simple method and device for accurately measuring flash memory cell current. The sensing scheme comprises an integrator, an analog to digital converter, and a digital to analog converter. The method comprises the acts of applying an input current and a feedback output current to a summer, integrating the resulting summer output over time, passing the integrated output to a clocked comparator, outputting a comparator output which controls a feedback circuit that keeps the integrator's voltage at the same level as a reference voltage, and outputting a digital average current to a counter. Delta sigma modulation (averaging) is employed to cancel out noise that would otherwise affect the cell current measurement.
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R. J. Baker, “Delta-Sigma Modulation for Sensing”, Boise State University, College of Engineering, pp. 1-36, Apr. 16, 2004.
Baker R. J.
Taylor Jennifer
Dickstein & Shapiro LLP
Micro)n Technology, Inc.
Phan Trong
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