Digital logic unit reconfigurable in nonvolatile fashion

Details Digital logic unit reconfigurable in nonvolatile fashion Digital logic unit reconfigurable in nonvolatile fashion

2008-07-15

2008-07-15

Tran, Anh Q (Department: 2819)

Electronic digital logic circuitry

Multifunctional or programmable

C326S038000, C326S047000

Reexamination Certificate

active

11795316

ABSTRACT:
A circuit analyzes the configured status of cells with a magnetic layer system, resistance of which may be altered by magnetic field pulses, forming a first line branch with data cells arranged in series and a second line branch with configurable cells arranged in series. The circuit includes a difference amplifier for determining a voltage signal giving the difference voltage of the line branches. Also included in the circuit is a voltage shifter for shifting the voltage signal to a value other than 0 volts, such as an adder or subtractor. In addition, the circuit includes a comparator or window comparator, for the decision as to whether the voltage signal lies in a valid or forbidden range and an evaluation unit for evaluating a valid voltage signal and for output of a logical low or high signal.

REFERENCES:
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patent: 2004/051853 (2004-06-01), None
R. Richter et al., “Nonvolatile field programmable spin-logic for reconfigurable computing”, Applied Physics Letters, vol. 80, No. 7, Feb. 18, 2002, pp. 1291-1293.
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W. Black, Jr. et al., “Programmable logic using giant-magnetoresistance and spin-dependent tunneling devices”, Journal of Applied Physics, vol. 87, No. 9, May 1, 2000, pp. 6674-6679.
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German Patent Office Action, mailed Sep. 23, 2005 and issued in corresponding German Patent Application No. 10 2005 001 938.2-42.

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