Patent ID: 7127650

Claim:
A method for testing an electronic memory having memory cells, which comprises: selecting a memory area of the memory, the memory area including at least some of the memory cells; sequentially reading out a test pattern stored in the memory cells in the selected memory area in a defined order through a common output to present at the common output the test pattern as a time-dependent signal; Fourier transforming the time-dependent signal into a spectrum dependent upon the test pattern; generating a test result that is dependent on the spectrum; and carrying out the test-result-generating step to generate a two-alternative test result by: forming a difference spectrum from the spectrum and a reference spectrum in a selected frequency range; and outputting a first of the alternatives for the test result if the following holds true for a predetermined limit value in the selected frequency range: |D(f)|≦λ, where, D(f) designates the difference spectrum and λ designates the predetermined limit value, and, otherwise, outputting a second of the alternatives for the test result.